我正在使用gitlab ci和image从源代码构建apache flink java:8u111-jdk ，并发现对文件权限的测试失败，因为不尊重文件权限。
其中一个单元测试如下：

@Test
    public void testDeleteDirectory() throws Exception {

        // deleting a non-existent file should not cause an error

        File doesNotExist = new File(tmp.newFolder(), "abc");
        FileUtils.deleteDirectory(doesNotExist);

        // deleting a write protected file should throw an error

        File cannotDeleteParent = tmp.newFolder();
        File cannotDeleteChild = new File(cannotDeleteParent, "child");

        try {
            assumeTrue(cannotDeleteChild.createNewFile());
            assumeTrue(cannotDeleteParent.setWritable(false));
            assumeTrue(cannotDeleteChild.setWritable(false));

            FileUtils.deleteDirectory(cannotDeleteParent);
            fail("this should fail with an exception");
        }
        catch (AccessDeniedException ignored) {
            // this is expected
        }
        finally {
            //noinspection ResultOfMethodCallIgnored
            cannotDeleteParent.setWritable(true);
            //noinspection ResultOfMethodCallIgnored
            cannotDeleteChild.setWritable(true);
        }
    }

试验结果为：

testDeleteDirectory(org.apache.flink.util.FileUtilsTest)  Time elapsed: 0.022 sec  <<< FAILURE!
java.lang.AssertionError: this should fail with an exception
    at org.junit.Assert.fail(Assert.java:88)
    at org.apache.flink.util.FileUtilsTest.testDeleteDirectory(FileUtilsTest.java:129)

当我深入研究代码时，我发现下面的语句 java.io.File :
在某些平台上，可以使用允许修改不允许写操作的文件的特权来启动java虚拟机。
所以我怀疑是ci环境出了问题。如何进一步调试问题？谢谢！
环境：
docker图像：java:8u111-jdk
操作系统内核：linux 4.9.0-8-amd64 x86\U 64
发行：debian 8
jdk版本：openjdk 1.8.0\u 111