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[mockito-match-list] match list param #18360

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Merged
merged 2 commits into from
Mar 9, 2025
Merged

[mockito-match-list] match list param #18360

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f2f7e1d
[mockito-match-list] match list param
sk1418 Mar 3, 2025
d6d64c6
[mockito-match-list] formatting
sk1418 Mar 6, 2025
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55 changes: 55 additions & 0 deletions ...ng-modules/mockito-4/src/test/java/com/baeldung/genericlist/MatchGenericListUnitTest.java
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package com.baeldung.genericlist;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyList;
import static org.mockito.Mockito.when;

import java.util.ArrayList;
import java.util.List;

import org.junit.jupiter.api.Test;
import org.mockito.ArgumentMatchers;
import org.mockito.Mockito;

interface MyInterface {

default String extractFirstLetters(List<String> words) {
return String.join(", ", words.stream()
.map(str -> str.substring(0, 1))
.toList());
}
}

public class MatchGenericListUnitTest {

@Test
void whenUseAnyWithListClass_thenCorrect() {
MyInterface mock = Mockito.mock(MyInterface.class);
when(mock.extractFirstLetters(any(List.class))).thenReturn("a, b, c, d, e");
assertEquals("a, b, c, d, e", mock.extractFirstLetters(new ArrayList<>()));
}

@Test
void whenUseAnyListWithTypeParameterInJava7_thenCorrect() {
//Java 7
MyInterface mock = Mockito.mock(MyInterface.class);
when(mock.extractFirstLetters(ArgumentMatchers.<String> anyList())).thenReturn("a, b, c, d, e");
assertEquals("a, b, c, d, e", mock.extractFirstLetters(new ArrayList<>()));
}

@Test
void whenUseAnyList_thenCorrect() {
MyInterface mock = Mockito.mock(MyInterface.class);
when(mock.extractFirstLetters(anyList())).thenReturn("a, b, c, d, e");
assertEquals("a, b, c, d, e", mock.extractFirstLetters(new ArrayList<>()));
}

@Test
void whenUseAny_thenCorrect() {
MyInterface mock = Mockito.mock(MyInterface.class);
when(mock.extractFirstLetters(any())).thenReturn("a, b, c, d, e");
assertEquals("a, b, c, d, e", mock.extractFirstLetters(new ArrayList<>()));
}

}