突变在应该使用具有自动注入字段的方法时未被杀死

问：

我有以下几点：

public class UnsetProperty extends Command {

    @Resource
    private SetProperty setProperty;

    public String parse(String[] args) {
        if (args.length != 4) {
            throw new RuntimeException("Incorrect number of arguments. Expected 4. Got " + args.length);
        }
        String publisher = args[0];
        String version = args[1];
        String mode = args[2];
        String property = args[3];

        /*
         * Unsetting a property is done by changing the current property to null.
         * Technically, the old property doesn't get changed, a new one is inserted with
         * a higher revision number, and it becomes the canonical one.
        */
        setProperty.setProperty(publisher, version, mode, property, null, false);
        return "";
    }
}

和以下测试：

public class UnsetPropertyTest extends CommandTest {
    @Configuration
    public static class Config {

        @Bean(name = "mockSetProperty")
        public SetProperty getSetProperty() {
            return mock(SetProperty.class);
        }

        @Bean
        public UnsetProperty getUnsetProperty() {
            return new UnsetProperty();
        }

    }

    @Resource
    @InjectMocks
    private UnsetProperty unsetProperty;

    @Resource(name = "mockSetProperty")
    private SetProperty setProperty;

    // ... SNIP ...

    @Test
    public void testCallsSetPropertyWithCorrectParameters() throws SQLException, TaboolaException {
        final String[] args = new String[]{"publisher", "version", "mode", "property"};
        final String output = unsetProperty.parse(args);
        verify(setProperty).setProperty("publisher", "version", "mode", "property", null, false);
        // The above line should have killed the mutation!
        verifyNoMoreInteractions(setProperty);
        assertThat(output).isEqualTo("");
    }
}

正如预期的那样，测试通过。当我通过 PIT 运行它时，我得到以下结果

33   1. removed call to my/package/SetProperty::setProperty → SURVIVED

第 #33 行在类代码中突出显示。

检查的测试如下：

• my.package.UnsetPropertyTest.testCallsSetPropertyWithCorrectParameters(my.package.UnsetPropertyTest)（32 毫秒）
• my.package.UnsetPropertyTest.testUnsetThrowsForIncorrectNumberOfParameters(my.package.UnsetPropertyTest)（3 毫秒）

现在：

• 当我更改测试调用参数 （） 时，测试失败。不出所料args
• 当我更改断言（）参数时，测试失败。不出所料。verify(setProperty).setProperty(...)
• 当我手动注释掉第一个代码块中突出显示的函数调用时，测试失败。

为什么突变能存活下来？

我正在使用 Java 8、Mockito 1.9.5 和 PIT 1.1.4。