Mocktio 5.0.x and later on Java 11/17 fails when mocking interface default methods #3013
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jxblum
changed the title
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Same problem on OpenJDK 17: $ java -version
openjdk version "17.0.7" 2023-04-18
OpenJDK Runtime Environment Temurin-17.0.7+7 (build 17.0.7+7)
OpenJDK 64-Bit Server VM Temurin-17.0.7+7 (build 17.0.7+7, mixed mode, sharing)
jblumWLVDQ:cp-labs jblum$
Again, I don't think Java version matters from |
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It doesn't even matter if the interface Cache<KEY extends Comparable<KEY>, VALUE> extends Iterable<KEY> {
boolean contains(KEY key);
@SuppressWarnings("unchecked")
default boolean containsAll(KEY... keys) {
return Arrays.stream(keys).allMatch(this::contains);
}
} |
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Given a custom interface ExtList<T> extends List<T> {
@SuppressWarnings("unchecked")
default boolean containsAll(T... elements) {
return Arrays.stream(elements).allMatch(this::contains);
}
}This test case passes: @Test
@SuppressWarnings("unchecked")
public void listContainsAllElementsReturnsTrue() {
ExtList<Object> mockList = mock(ExtList.class);
doReturn(true).when(mockList).contains(any());
doCallRealMethod().when(mockList).containsAll(any(Object[].class));
assertThat(mockList.containsAll("ONE", "TWO")).isTrue();
verify(mockList, times(1)).containsAll(eq("ONE"), eq("TWO"));
Arrays.asList("ONE", "TWO").forEach(element ->
verify(mockList, times(1)).contains(eq(element)));
verifyNoMoreInteractions(mockList);
}Though, I am not sure why the Update Gist: https://gist.github.com/jxblum/570a58ccf0e4590c3a97b82901c95952 |
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After a bit more experimentation, the test only passes when the arrangement on the mock is the following: doCallRealMethod().when(mockCache).containsAll(any(), any());Given 2 arguments. How to mock a vararg method in Mockito |
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Stubbing varargs methods has changed in Mockito 5 and is documented in the release notes: https://github.com/mockito/mockito/releases/tag/v5.0.0 |
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According to the Javadoc for doCallRealMethod().when(mockCache).containsAll(any()); |
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The JavaDoc has been updated in #3003 |
I am running Java
17with JUnit5.9.3and Mockito5.3.1on Mac OS13.3.1.Java Version
$ java -version java version "17.0.7" 2023-04-18 LTS Java(TM) SE Runtime Environment (build 17.0.7+8-LTS-224) Java HotSpot(TM) 64-Bit Server VM (build 17.0.7+8-LTS-224, mixed mode, sharing)Maven Dependencies
The following example:
https://gist.github.com/jxblum/570a58ccf0e4590c3a97b82901c95952
Does not work correct with Mockito
5.0.0or later, up to and including5.3.1.This used to work on Mockito
4.11.0(pre5.0) but no longer works!The following error occurs:
This is even a problem on Java 11, though I suspect the Java version has little to do with the underlying issue.
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