假设您要测试的类如下所示

class ABCSupplier {

    void supply() {

        CompletableFuture.supplyAsync(XYZ::getFieldABC);
    }
}

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您可以使用Mockito模拟静力学，如下所示：

@ExtendWith(MockitoExtension.class)
class ABCSupplierTest {

    @InjectMocks
    ABCSupplier abcSupplier;

    @Captor
    private ArgumentCaptor<Supplier<ABC>> supplierArgumentCaptor;

    @Test
    void it_should_supply_ABC_field() {

        final ABC abc = new ABC();

        try (var completableFutureMockedStatic = Mockito.mockStatic(CompletableFuture.class);
            var xyzMockedStatic = Mockito.mockStatic(XYZ.class)) {

            xyzMockedStatic.when(XYZ::getFieldABC)
                .thenReturn(abc);

            this.abcSupplier.supply();

            completableFutureMockedStatic.verify(() -> CompletableFuture.supplyAsync(this.supplierArgumentCaptor.capture()));

            Assertions.assertThat(this.supplierArgumentCaptor.getValue().get())
                .isEqualTo(abc);
        }
    }
}

型