From https://github.com/stefanuebe/vaadin-fullcalendar
 * branch            master     -> FETCH_HEAD
Already on 'master'
Your branch is up to date with 'origin/master'.
HEAD is now at 70aca27 7.1.6 final
$ mvn versions:set-property -Dproperty=vaadin.version -DnewVersion=25.1.1 -DgenerateBackupPoms=false -B --no-transfer-progress
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO] 
[INFO] FullCalendar for Flow                                              [jar]
[INFO] FullCalendar Scheduler for Flow                                    [jar]
[INFO] Full Calendar web component demo                                   [jar]
[INFO] fullcalendar-parent                                                [pom]
[INFO] Full Calendar E2E Test App                                         [jar]
[INFO] 
[INFO] ------------------< org.vaadin.stefan:fullcalendar2 >-------------------
[INFO] Building FullCalendar for Flow 7.1.6                               [1/5]
[INFO]   from addon/pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- versions:2.21.0:set-property (default-cli) @ fullcalendar2 ---
[INFO] 
[INFO] -------------< org.vaadin.stefan:fullcalendar2-scheduler >--------------
[INFO] Building FullCalendar Scheduler for Flow 7.1.6                     [2/5]
[INFO]   from addon-scheduler/pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- versions:2.21.0:set-property (default-cli) @ fullcalendar2-scheduler ---
[INFO] 
[INFO] ----------------< org.vaadin.stefan:fullcalendar-demo >-----------------
[INFO] Building Full Calendar web component demo 25.0.0-SNAPSHOT          [3/5]
[INFO]   from demo/pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- versions:2.21.0:set-property (default-cli) @ fullcalendar-demo ---
[INFO] 
[INFO] ---------------< org.vaadin.stefan:fullcalendar-parent >----------------
[INFO] Building fullcalendar-parent 7.1.6                                 [4/5]
[INFO]   from pom.xml
[INFO] --------------------------------[ pom ]---------------------------------
[INFO] 
[INFO] --- versions:2.21.0:set-property (default-cli) @ fullcalendar-parent ---
[INFO] 
[INFO] ------------< org.vaadin.stefan:fullcalendar-e2e-test-app >-------------
[INFO] Building Full Calendar E2E Test App 25.0.0-SNAPSHOT                [5/5]
[INFO]   from e2e-test-app/pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- versions:2.21.0:set-property (default-cli) @ fullcalendar-e2e-test-app ---
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] FullCalendar for Flow 7.1.6 ........................ SUCCESS [  2.113 s]
[INFO] FullCalendar Scheduler for Flow 7.1.6 .............. SUCCESS [  0.039 s]
[INFO] Full Calendar web component demo 25.0.0-SNAPSHOT ... SUCCESS [  0.041 s]
[INFO] fullcalendar-parent 7.1.6 .......................... SUCCESS [  0.008 s]
[INFO] Full Calendar E2E Test App 25.0.0-SNAPSHOT ......... SUCCESS [  0.082 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  3.413 s
[INFO] Finished at: 2026-04-14T06:35:50Z
[INFO] ------------------------------------------------------------------------
$ mvn versions:set -DnewVersion=25.1.1 -DartifactId=vaadin-bom -DgenerateBackupPoms=false -B --no-transfer-progress
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO] 
[INFO] FullCalendar for Flow                                              [jar]
[INFO] FullCalendar Scheduler for Flow                                    [jar]
[INFO] Full Calendar web component demo                                   [jar]
[INFO] fullcalendar-parent                                                [pom]
[INFO] Full Calendar E2E Test App                                         [jar]
[INFO] 
[INFO] ---------------< org.vaadin.stefan:fullcalendar-parent >----------------
[INFO] Building fullcalendar-parent 7.1.6                                 [1/5]
[INFO]   from pom.xml
[INFO] --------------------------------[ pom ]---------------------------------
[INFO] 
[INFO] --- versions:2.21.0:set (default-cli) @ fullcalendar-parent ---
[INFO] Searching for local aggregator root...
[INFO] Local aggregation root: /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar
[INFO] Processing change of org.vaadin.stefan:vaadin-bom:7.1.6 -> 25.1.1
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] FullCalendar for Flow 7.1.6 ........................ SKIPPED
[INFO] FullCalendar Scheduler for Flow 7.1.6 .............. SKIPPED
[INFO] Full Calendar web component demo 25.0.0-SNAPSHOT ... SKIPPED
[INFO] fullcalendar-parent 7.1.6 .......................... SUCCESS [  1.498 s]
[INFO] Full Calendar E2E Test App 25.0.0-SNAPSHOT ......... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.454 s
[INFO] Finished at: 2026-04-14T06:35:56Z
[INFO] ------------------------------------------------------------------------
$ mvn clean verify -B --no-transfer-progress
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO] 
[INFO] FullCalendar for Flow                                              [jar]
[INFO] FullCalendar Scheduler for Flow                                    [jar]
[INFO] Full Calendar web component demo                                   [jar]
[INFO] fullcalendar-parent                                                [pom]
[INFO] Full Calendar E2E Test App                                         [jar]
[INFO] 
[INFO] ------------------< org.vaadin.stefan:fullcalendar2 >-------------------
[INFO] Building FullCalendar for Flow 7.1.6                               [1/5]
[INFO]   from addon/pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- clean:3.2.0:clean (default-clean) @ fullcalendar2 ---
[INFO] Deleting /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/target
[INFO] 
[INFO] --- resources:3.3.1:resources (default-resources) @ fullcalendar2 ---
[INFO] Copying 3 resources from src/main/resources to target/classes
[INFO] 
[INFO] --- compiler:3.14.1:compile (default-compile) @ fullcalendar2 ---
[INFO] Recompiling the module because of changed source code.
[INFO] Compiling 98 source files with javac [debug release 21] to target/classes
[WARNING] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/main/java/org/vaadin/stefan/fullcalendar/dataprovider/EntryQuery.java:[29,20] @Builder will ignore the initializing expression entirely. If you want the initializing expression to serve as default, add @Builder.Default. If it is not supposed to be settable during building, make the field final.
[WARNING] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/main/java/org/vaadin/stefan/fullcalendar/FullCalendar.java:[180,12] deprecated item is not annotated with @Deprecated
[INFO] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/main/java/org/vaadin/stefan/fullcalendar/FullCalendarBuilder.java: /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/main/java/org/vaadin/stefan/fullcalendar/FullCalendarBuilder.java uses or overrides a deprecated API.
[INFO] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/main/java/org/vaadin/stefan/fullcalendar/FullCalendarBuilder.java: Recompile with -Xlint:deprecation for details.
[INFO] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/main/java/org/vaadin/stefan/fullcalendar/FullCalendar.java: Some input files use unchecked or unsafe operations.
[INFO] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/main/java/org/vaadin/stefan/fullcalendar/FullCalendar.java: Recompile with -Xlint:unchecked for details.
[INFO] 
[INFO] --- resources:3.3.1:testResources (default-testResources) @ fullcalendar2 ---
[INFO] skip non existing resourceDirectory /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/test/resources
[INFO] 
[INFO] --- compiler:3.14.1:testCompile (default-testCompile) @ fullcalendar2 ---
[INFO] Recompiling the module because of changed dependency.
[INFO] Compiling 22 source files with javac [debug release 21] to target/test-classes
[WARNING] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/test/java/org/vaadin/stefan/fullcalendar/FullCalendarTest.java:[163,60] non-varargs call of varargs method with inexact argument type for last parameter;
  cast to org.vaadin.stefan.fullcalendar.BusinessHours for a varargs call
  cast to org.vaadin.stefan.fullcalendar.BusinessHours[] for a non-varargs call and to suppress this warning
[WARNING] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/test/java/org/vaadin/stefan/fullcalendar/FullCalendarTest.java:[424,49] non-varargs call of varargs method with inexact argument type for last parameter;
  cast to org.vaadin.stefan.fullcalendar.converters.JsonItemPropertyConverter for a varargs call
  cast to org.vaadin.stefan.fullcalendar.converters.JsonItemPropertyConverter[] for a non-varargs call and to suppress this warning
[INFO] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/test/java/org/vaadin/stefan/fullcalendar/AdvancedOptionsTest.java: Some input files use or override a deprecated API.
[INFO] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/test/java/org/vaadin/stefan/fullcalendar/AdvancedOptionsTest.java: Recompile with -Xlint:deprecation for details.
[INFO] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/test/java/org/vaadin/stefan/fullcalendar/FullCalendarTest.java: Some input files use unchecked or unsafe operations.
[INFO] /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/src/test/java/org/vaadin/stefan/fullcalendar/FullCalendarTest.java: Recompile with -Xlint:unchecked for details.
[INFO] 
[INFO] --- surefire:3.5.4:test (default-test) @ fullcalendar2 ---
[INFO] Using auto detected provider org.apache.maven.surefire.junitplatform.JUnitPlatformProvider
[INFO] 
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running org.vaadin.stefan.fullcalendar.JsCallbackTest
[INFO] Tests run: 26, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.023 s -- in org.vaadin.stefan.fullcalendar.JsCallbackTest
[INFO] Running org.vaadin.stefan.fullcalendar.ConverterTest
[INFO] Tests run: 13, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.048 s -- in org.vaadin.stefan.fullcalendar.ConverterTest
[INFO] Running org.vaadin.stefan.fullcalendar.DeltaTest
[INFO] Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.033 s -- in org.vaadin.stefan.fullcalendar.DeltaTest
[INFO] Running org.vaadin.stefan.fullcalendar.JsonUtilsTest
[INFO] Tests run: 12, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.190 s -- in org.vaadin.stefan.fullcalendar.JsonUtilsTest
[INFO] Running org.vaadin.stefan.fullcalendar.InMemoryEntryProviderTest
[INFO] Tests run: 11, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.219 s -- in org.vaadin.stefan.fullcalendar.InMemoryEntryProviderTest
[INFO] Running org.vaadin.stefan.fullcalendar.EntryTest
[INFO] Tests run: 12, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.114 s -- in org.vaadin.stefan.fullcalendar.EntryTest
[INFO] Running org.vaadin.stefan.fullcalendar.RecurringTimeTest
[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.012 s -- in org.vaadin.stefan.fullcalendar.RecurringTimeTest
[INFO] Running org.vaadin.stefan.fullcalendar.EntryModelTest
[INFO] Tests run: 59, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.170 s -- in org.vaadin.stefan.fullcalendar.EntryModelTest
[INFO] Running org.vaadin.stefan.fullcalendar.FullCalendarBuilderTest
[INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.006 s -- in org.vaadin.stefan.fullcalendar.FullCalendarBuilderTest
[INFO] Running org.vaadin.stefan.fullcalendar.EventSourcesTest
[INFO] Tests run: 58, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.288 s -- in org.vaadin.stefan.fullcalendar.EventSourcesTest
[INFO] Running org.vaadin.stefan.fullcalendar.TimezoneTests
[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.006 s -- in org.vaadin.stefan.fullcalendar.TimezoneTests
[INFO] Running org.vaadin.stefan.fullcalendar.AdvancedOptionsTest
[INFO] Tests run: 30, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.073 s -- in org.vaadin.stefan.fullcalendar.AdvancedOptionsTest
[INFO] Running org.vaadin.stefan.fullcalendar.CalendarLocaleTest
[INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.021 s -- in org.vaadin.stefan.fullcalendar.CalendarLocaleTest
[INFO] Running org.vaadin.stefan.fullcalendar.FullCalendarTest
[INFO] Tests run: 18, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.123 s -- in org.vaadin.stefan.fullcalendar.FullCalendarTest
[INFO] Running org.vaadin.stefan.fullcalendar.TimeslotsSelectedEventTest
OpenJDK 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended
WARNING: A Java agent has been loaded dynamically (/home/ghrunner/.m2/repository/net/bytebuddy/byte-buddy-agent/1.12.22/byte-buddy-agent-1.12.22.jar)
WARNING: If a serviceability tool is in use, please run with -XX:+EnableDynamicAgentLoading to hide this warning
WARNING: If a serviceability tool is not in use, please run with -Djdk.instrument.traceUsage for more information
WARNING: Dynamic loading of agents will be disallowed by default in a future release
[ERROR] Tests run: 6, Failures: 0, Errors: 6, Skipped: 0, Time elapsed: 2.504 s <<< FAILURE! -- in org.vaadin.stefan.fullcalendar.TimeslotsSelectedEventTest
[ERROR] org.vaadin.stefan.fullcalendar.TimeslotsSelectedEventTest.getStartAsInstant -- Time elapsed: 1.419 s <<< ERROR!
org.mockito.exceptions.base.MockitoException: 

Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at org.mockito.junit.jupiter.MockitoExtension.beforeEach(MockitoExtension.java:153)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	Suppressed: java.lang.NullPointerException: Cannot invoke "java.util.Set.forEach(java.util.function.Consumer)" because the return value of "org.junit.jupiter.api.extension.ExtensionContext$Store.remove(Object, java.lang.Class)" is null
		at org.mockito.junit.jupiter.MockitoExtension.afterEach(MockitoExtension.java:184)
		... 2 more
Caused by: org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	... 3 more
Caused by: java.lang.IllegalStateException: 
Byte Buddy could not instrument all classes within the mock's type hierarchy

This problem should never occur for javac-compiled classes. This problem has been observed for classes that are:
 - Compiled by older versions of scalac
 - Classes that are part of the Android distribution
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:285)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.mockClass(InlineBytecodeGenerator.java:218)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.lambda$mockClass$0(TypeCachingBytecodeGenerator.java:47)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:40)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMockType(InlineDelegateByteBuddyMockMaker.java:396)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.doCreateMock(InlineDelegateByteBuddyMockMaker.java:355)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMock(InlineDelegateByteBuddyMockMaker.java:334)
	at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.createMock(InlineByteBuddyMockMaker.java:56)
	at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:99)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:88)
	at org.mockito.Mockito.mock(Mockito.java:2037)
	at org.mockito.internal.configuration.MockAnnotationProcessor.processAnnotationForMock(MockAnnotationProcessor.java:74)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:28)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:25)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:44)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:72)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:73)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:47)
	at org.mockito.MockitoAnnotations.openMocks(MockitoAnnotations.java:81)
	at org.mockito.internal.framework.DefaultMockitoSession.<init>(DefaultMockitoSession.java:43)
	at org.mockito.internal.session.DefaultMockitoSessionBuilder.startMocking(DefaultMockitoSessionBuilder.java:83)
	... 3 more
Caused by: java.lang.IllegalArgumentException: Java 21 (65) is not supported by the current version of Byte Buddy which officially supports Java 20 (64) - update Byte Buddy or set net.bytebuddy.experimental as a VM property
	at net.bytebuddy.utility.OpenedClassReader.of(OpenedClassReader.java:96)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForInlining.create(TypeWriter.java:4011)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default.make(TypeWriter.java:2224)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$UsingTypeWriter.make(DynamicType.java:4050)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase.make(DynamicType.java:3734)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.transform(InlineBytecodeGenerator.java:402)
	at java.instrument/java.lang.instrument.ClassFileTransformer.transform(ClassFileTransformer.java:244)
	at java.instrument/sun.instrument.TransformerManager.transform(TransformerManager.java:188)
	at java.instrument/sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:610)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:225)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:281)
	... 27 more

[ERROR] org.vaadin.stefan.fullcalendar.TimeslotsSelectedEventTest.getEnd -- Time elapsed: 0.222 s <<< ERROR!
org.mockito.exceptions.base.MockitoException: 

Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at org.mockito.junit.jupiter.MockitoExtension.beforeEach(MockitoExtension.java:153)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	Suppressed: java.lang.NullPointerException: Cannot invoke "java.util.Set.forEach(java.util.function.Consumer)" because the return value of "org.junit.jupiter.api.extension.ExtensionContext$Store.remove(Object, java.lang.Class)" is null
		at org.mockito.junit.jupiter.MockitoExtension.afterEach(MockitoExtension.java:184)
		... 2 more
Caused by: org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	... 3 more
Caused by: java.lang.IllegalStateException: 
Byte Buddy could not instrument all classes within the mock's type hierarchy

This problem should never occur for javac-compiled classes. This problem has been observed for classes that are:
 - Compiled by older versions of scalac
 - Classes that are part of the Android distribution
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:285)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.mockClass(InlineBytecodeGenerator.java:218)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.lambda$mockClass$0(TypeCachingBytecodeGenerator.java:47)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:40)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMockType(InlineDelegateByteBuddyMockMaker.java:396)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.doCreateMock(InlineDelegateByteBuddyMockMaker.java:355)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMock(InlineDelegateByteBuddyMockMaker.java:334)
	at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.createMock(InlineByteBuddyMockMaker.java:56)
	at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:99)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:88)
	at org.mockito.Mockito.mock(Mockito.java:2037)
	at org.mockito.internal.configuration.MockAnnotationProcessor.processAnnotationForMock(MockAnnotationProcessor.java:74)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:28)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:25)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:44)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:72)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:73)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:47)
	at org.mockito.MockitoAnnotations.openMocks(MockitoAnnotations.java:81)
	at org.mockito.internal.framework.DefaultMockitoSession.<init>(DefaultMockitoSession.java:43)
	at org.mockito.internal.session.DefaultMockitoSessionBuilder.startMocking(DefaultMockitoSessionBuilder.java:83)
	... 3 more
Caused by: java.lang.IllegalArgumentException: Java 21 (65) is not supported by the current version of Byte Buddy which officially supports Java 20 (64) - update Byte Buddy or set net.bytebuddy.experimental as a VM property
	at net.bytebuddy.utility.OpenedClassReader.of(OpenedClassReader.java:96)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForInlining.create(TypeWriter.java:4011)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default.make(TypeWriter.java:2224)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$UsingTypeWriter.make(DynamicType.java:4050)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase.make(DynamicType.java:3734)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.transform(InlineBytecodeGenerator.java:402)
	at java.instrument/java.lang.instrument.ClassFileTransformer.transform(ClassFileTransformer.java:244)
	at java.instrument/sun.instrument.TransformerManager.transform(TransformerManager.java:188)
	at java.instrument/sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:610)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:225)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:281)
	... 27 more

[ERROR] org.vaadin.stefan.fullcalendar.TimeslotsSelectedEventTest.getStartWithOffset -- Time elapsed: 0.207 s <<< ERROR!
org.mockito.exceptions.base.MockitoException: 

Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at org.mockito.junit.jupiter.MockitoExtension.beforeEach(MockitoExtension.java:153)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	Suppressed: java.lang.NullPointerException: Cannot invoke "java.util.Set.forEach(java.util.function.Consumer)" because the return value of "org.junit.jupiter.api.extension.ExtensionContext$Store.remove(Object, java.lang.Class)" is null
		at org.mockito.junit.jupiter.MockitoExtension.afterEach(MockitoExtension.java:184)
		... 2 more
Caused by: org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	... 3 more
Caused by: java.lang.IllegalStateException: 
Byte Buddy could not instrument all classes within the mock's type hierarchy

This problem should never occur for javac-compiled classes. This problem has been observed for classes that are:
 - Compiled by older versions of scalac
 - Classes that are part of the Android distribution
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:285)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.mockClass(InlineBytecodeGenerator.java:218)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.lambda$mockClass$0(TypeCachingBytecodeGenerator.java:47)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:40)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMockType(InlineDelegateByteBuddyMockMaker.java:396)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.doCreateMock(InlineDelegateByteBuddyMockMaker.java:355)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMock(InlineDelegateByteBuddyMockMaker.java:334)
	at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.createMock(InlineByteBuddyMockMaker.java:56)
	at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:99)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:88)
	at org.mockito.Mockito.mock(Mockito.java:2037)
	at org.mockito.internal.configuration.MockAnnotationProcessor.processAnnotationForMock(MockAnnotationProcessor.java:74)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:28)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:25)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:44)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:72)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:73)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:47)
	at org.mockito.MockitoAnnotations.openMocks(MockitoAnnotations.java:81)
	at org.mockito.internal.framework.DefaultMockitoSession.<init>(DefaultMockitoSession.java:43)
	at org.mockito.internal.session.DefaultMockitoSessionBuilder.startMocking(DefaultMockitoSessionBuilder.java:83)
	... 3 more
Caused by: java.lang.IllegalArgumentException: Java 21 (65) is not supported by the current version of Byte Buddy which officially supports Java 20 (64) - update Byte Buddy or set net.bytebuddy.experimental as a VM property
	at net.bytebuddy.utility.OpenedClassReader.of(OpenedClassReader.java:96)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForInlining.create(TypeWriter.java:4011)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default.make(TypeWriter.java:2224)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$UsingTypeWriter.make(DynamicType.java:4050)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase.make(DynamicType.java:3734)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.transform(InlineBytecodeGenerator.java:402)
	at java.instrument/java.lang.instrument.ClassFileTransformer.transform(ClassFileTransformer.java:244)
	at java.instrument/sun.instrument.TransformerManager.transform(TransformerManager.java:188)
	at java.instrument/sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:610)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:225)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:281)
	... 27 more

[ERROR] org.vaadin.stefan.fullcalendar.TimeslotsSelectedEventTest.getEndAsInstant -- Time elapsed: 0.112 s <<< ERROR!
org.mockito.exceptions.base.MockitoException: 

Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at org.mockito.junit.jupiter.MockitoExtension.beforeEach(MockitoExtension.java:153)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	Suppressed: java.lang.NullPointerException: Cannot invoke "java.util.Set.forEach(java.util.function.Consumer)" because the return value of "org.junit.jupiter.api.extension.ExtensionContext$Store.remove(Object, java.lang.Class)" is null
		at org.mockito.junit.jupiter.MockitoExtension.afterEach(MockitoExtension.java:184)
		... 2 more
Caused by: org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	... 3 more
Caused by: java.lang.IllegalStateException: 
Byte Buddy could not instrument all classes within the mock's type hierarchy

This problem should never occur for javac-compiled classes. This problem has been observed for classes that are:
 - Compiled by older versions of scalac
 - Classes that are part of the Android distribution
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:285)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.mockClass(InlineBytecodeGenerator.java:218)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.lambda$mockClass$0(TypeCachingBytecodeGenerator.java:47)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:40)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMockType(InlineDelegateByteBuddyMockMaker.java:396)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.doCreateMock(InlineDelegateByteBuddyMockMaker.java:355)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMock(InlineDelegateByteBuddyMockMaker.java:334)
	at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.createMock(InlineByteBuddyMockMaker.java:56)
	at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:99)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:88)
	at org.mockito.Mockito.mock(Mockito.java:2037)
	at org.mockito.internal.configuration.MockAnnotationProcessor.processAnnotationForMock(MockAnnotationProcessor.java:74)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:28)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:25)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:44)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:72)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:73)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:47)
	at org.mockito.MockitoAnnotations.openMocks(MockitoAnnotations.java:81)
	at org.mockito.internal.framework.DefaultMockitoSession.<init>(DefaultMockitoSession.java:43)
	at org.mockito.internal.session.DefaultMockitoSessionBuilder.startMocking(DefaultMockitoSessionBuilder.java:83)
	... 3 more
Caused by: java.lang.IllegalArgumentException: Java 21 (65) is not supported by the current version of Byte Buddy which officially supports Java 20 (64) - update Byte Buddy or set net.bytebuddy.experimental as a VM property
	at net.bytebuddy.utility.OpenedClassReader.of(OpenedClassReader.java:96)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForInlining.create(TypeWriter.java:4011)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default.make(TypeWriter.java:2224)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$UsingTypeWriter.make(DynamicType.java:4050)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase.make(DynamicType.java:3734)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.transform(InlineBytecodeGenerator.java:402)
	at java.instrument/java.lang.instrument.ClassFileTransformer.transform(ClassFileTransformer.java:244)
	at java.instrument/sun.instrument.TransformerManager.transform(TransformerManager.java:188)
	at java.instrument/sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:610)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:225)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:281)
	... 27 more

[ERROR] org.vaadin.stefan.fullcalendar.TimeslotsSelectedEventTest.getEndWithOffset -- Time elapsed: 0.184 s <<< ERROR!
org.mockito.exceptions.base.MockitoException: 

Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at org.mockito.junit.jupiter.MockitoExtension.beforeEach(MockitoExtension.java:153)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	Suppressed: java.lang.NullPointerException: Cannot invoke "java.util.Set.forEach(java.util.function.Consumer)" because the return value of "org.junit.jupiter.api.extension.ExtensionContext$Store.remove(Object, java.lang.Class)" is null
		at org.mockito.junit.jupiter.MockitoExtension.afterEach(MockitoExtension.java:184)
		... 2 more
Caused by: org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	... 3 more
Caused by: java.lang.IllegalStateException: 
Byte Buddy could not instrument all classes within the mock's type hierarchy

This problem should never occur for javac-compiled classes. This problem has been observed for classes that are:
 - Compiled by older versions of scalac
 - Classes that are part of the Android distribution
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:285)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.mockClass(InlineBytecodeGenerator.java:218)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.lambda$mockClass$0(TypeCachingBytecodeGenerator.java:47)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:40)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMockType(InlineDelegateByteBuddyMockMaker.java:396)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.doCreateMock(InlineDelegateByteBuddyMockMaker.java:355)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMock(InlineDelegateByteBuddyMockMaker.java:334)
	at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.createMock(InlineByteBuddyMockMaker.java:56)
	at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:99)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:88)
	at org.mockito.Mockito.mock(Mockito.java:2037)
	at org.mockito.internal.configuration.MockAnnotationProcessor.processAnnotationForMock(MockAnnotationProcessor.java:74)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:28)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:25)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:44)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:72)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:73)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:47)
	at org.mockito.MockitoAnnotations.openMocks(MockitoAnnotations.java:81)
	at org.mockito.internal.framework.DefaultMockitoSession.<init>(DefaultMockitoSession.java:43)
	at org.mockito.internal.session.DefaultMockitoSessionBuilder.startMocking(DefaultMockitoSessionBuilder.java:83)
	... 3 more
Caused by: java.lang.IllegalArgumentException: Java 21 (65) is not supported by the current version of Byte Buddy which officially supports Java 20 (64) - update Byte Buddy or set net.bytebuddy.experimental as a VM property
	at net.bytebuddy.utility.OpenedClassReader.of(OpenedClassReader.java:96)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForInlining.create(TypeWriter.java:4011)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default.make(TypeWriter.java:2224)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$UsingTypeWriter.make(DynamicType.java:4050)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase.make(DynamicType.java:3734)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.transform(InlineBytecodeGenerator.java:402)
	at java.instrument/java.lang.instrument.ClassFileTransformer.transform(ClassFileTransformer.java:244)
	at java.instrument/sun.instrument.TransformerManager.transform(TransformerManager.java:188)
	at java.instrument/sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:610)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:225)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:281)
	... 27 more

[ERROR] org.vaadin.stefan.fullcalendar.TimeslotsSelectedEventTest.getStart -- Time elapsed: 0.230 s <<< ERROR!
org.mockito.exceptions.base.MockitoException: 

Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at org.mockito.junit.jupiter.MockitoExtension.beforeEach(MockitoExtension.java:153)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	Suppressed: java.lang.NullPointerException: Cannot invoke "java.util.Set.forEach(java.util.function.Consumer)" because the return value of "org.junit.jupiter.api.extension.ExtensionContext$Store.remove(Object, java.lang.Class)" is null
		at org.mockito.junit.jupiter.MockitoExtension.afterEach(MockitoExtension.java:184)
		... 2 more
Caused by: org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	... 3 more
Caused by: java.lang.IllegalStateException: 
Byte Buddy could not instrument all classes within the mock's type hierarchy

This problem should never occur for javac-compiled classes. This problem has been observed for classes that are:
 - Compiled by older versions of scalac
 - Classes that are part of the Android distribution
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:285)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.mockClass(InlineBytecodeGenerator.java:218)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.lambda$mockClass$0(TypeCachingBytecodeGenerator.java:47)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399)
	at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190)
	at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410)
	at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:40)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMockType(InlineDelegateByteBuddyMockMaker.java:396)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.doCreateMock(InlineDelegateByteBuddyMockMaker.java:355)
	at org.mockito.internal.creation.bytebuddy.InlineDelegateByteBuddyMockMaker.createMock(InlineDelegateByteBuddyMockMaker.java:334)
	at org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker.createMock(InlineByteBuddyMockMaker.java:56)
	at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:99)
	at org.mockito.internal.MockitoCore.mock(MockitoCore.java:88)
	at org.mockito.Mockito.mock(Mockito.java:2037)
	at org.mockito.internal.configuration.MockAnnotationProcessor.processAnnotationForMock(MockAnnotationProcessor.java:74)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:28)
	at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:25)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:44)
	at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:72)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:73)
	at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:47)
	at org.mockito.MockitoAnnotations.openMocks(MockitoAnnotations.java:81)
	at org.mockito.internal.framework.DefaultMockitoSession.<init>(DefaultMockitoSession.java:43)
	at org.mockito.internal.session.DefaultMockitoSessionBuilder.startMocking(DefaultMockitoSessionBuilder.java:83)
	... 3 more
Caused by: java.lang.IllegalArgumentException: Java 21 (65) is not supported by the current version of Byte Buddy which officially supports Java 20 (64) - update Byte Buddy or set net.bytebuddy.experimental as a VM property
	at net.bytebuddy.utility.OpenedClassReader.of(OpenedClassReader.java:96)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForInlining.create(TypeWriter.java:4011)
	at net.bytebuddy.dynamic.scaffold.TypeWriter$Default.make(TypeWriter.java:2224)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$UsingTypeWriter.make(DynamicType.java:4050)
	at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase.make(DynamicType.java:3734)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.transform(InlineBytecodeGenerator.java:402)
	at java.instrument/java.lang.instrument.ClassFileTransformer.transform(ClassFileTransformer.java:244)
	at java.instrument/sun.instrument.TransformerManager.transform(TransformerManager.java:188)
	at java.instrument/sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:610)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
	at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:225)
	at org.mockito.internal.creation.bytebuddy.InlineBytecodeGenerator.triggerRetransformation(InlineBytecodeGenerator.java:281)
	... 27 more

[INFO] Running org.vaadin.stefan.fullcalendar.FullCalendarOptionsTest
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.014 s -- in org.vaadin.stefan.fullcalendar.FullCalendarOptionsTest
[INFO] Running org.vaadin.stefan.fullcalendar.InteractionCallbacksTest
[INFO] Tests run: 27, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.283 s -- in org.vaadin.stefan.fullcalendar.InteractionCallbacksTest
[INFO] Running org.vaadin.stefan.fullcalendar.DraggableTest
[INFO] Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.053 s -- in org.vaadin.stefan.fullcalendar.DraggableTest
[INFO] Running org.vaadin.stefan.fullcalendar.AccessibilityTouchTest
[INFO] Tests run: 29, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.143 s -- in org.vaadin.stefan.fullcalendar.AccessibilityTouchTest
[INFO] Running org.vaadin.stefan.fullcalendar.BusinessHoursTest
[INFO] Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.009 s -- in org.vaadin.stefan.fullcalendar.BusinessHoursTest
[INFO] Running org.vaadin.stefan.fullcalendar.DisplayOptionsTest
[INFO] Tests run: 40, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.133 s -- in org.vaadin.stefan.fullcalendar.DisplayOptionsTest
[INFO] 
[INFO] Results:
[INFO] 
[ERROR] Errors: 
[ERROR]   TimeslotsSelectedEventTest.getEnd » Mockito 
Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
[ERROR]   TimeslotsSelectedEventTest.getEndAsInstant » Mockito 
Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
[ERROR]   TimeslotsSelectedEventTest.getEndWithOffset » Mockito 
Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
[ERROR]   TimeslotsSelectedEventTest.getStart » Mockito 
Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
[ERROR]   TimeslotsSelectedEventTest.getStartAsInstant » Mockito 
Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
[ERROR]   TimeslotsSelectedEventTest.getStartWithOffset » Mockito 
Mockito cannot mock this class: class org.vaadin.stefan.fullcalendar.FullCalendar.

If you're not sure why you're getting this error, please open an issue on GitHub.


Java               : 21
JVM vendor name    : Eclipse Adoptium
JVM vendor version : 21+35-LTS
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 21+35-LTS
JVM info           : mixed mode, sharing
OS name            : Linux
OS version         : 6.8.0-107-generic


You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

Underlying exception : org.mockito.exceptions.base.MockitoException: Could not modify all classes [interface com.vaadin.flow.component.HasTheme, class com.vaadin.flow.component.Component, interface com.vaadin.flow.component.HasSize, interface com.vaadin.flow.component.AttachNotifier, interface com.vaadin.flow.component.DetachNotifier, interface java.io.Serializable, interface com.vaadin.flow.component.HasStyle, class java.lang.Object, class org.vaadin.stefan.fullcalendar.FullCalendar, interface com.vaadin.flow.component.HasElement]
[INFO] 
[ERROR] Tests run: 371, Failures: 0, Errors: 6, Skipped: 0
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] FullCalendar for Flow 7.1.6 ........................ FAILURE [ 20.795 s]
[INFO] FullCalendar Scheduler for Flow 7.1.6 .............. SKIPPED
[INFO] Full Calendar web component demo 25.0.0-SNAPSHOT ... SKIPPED
[INFO] fullcalendar-parent 7.1.6 .......................... SKIPPED
[INFO] Full Calendar E2E Test App 25.0.0-SNAPSHOT ......... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  21.569 s
[INFO] Finished at: 2026-04-14T06:36:28Z
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:3.5.4:test (default-test) on project fullcalendar2: 
[ERROR] 
[ERROR] See /home/ghrunner/actions-runner/_work/vaadin-ecosystem-build/vaadin-ecosystem-build/work/vaadin-fullcalendar/addon/target/surefire-reports for the individual test results.
[ERROR] See dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException