code: @Test public void rmTest() throws IOException {
    StringBuilder toCompare=new StringBuilder();
    mFsShell.mkdir(new String[]{"mkdir","/testFolder1/testFolder2/testFile2"});
    toCompare.append(getCommandOutput(new String[]{"mkdir","/testFolder1/testFolder2/testFile2"}));
    Assert.assertNotNull(mTfs.getFile("/testFolder1"));
    Assert.assertNotNull(mTfs.getFile("/testFolder1/testFolder2"));
    Assert.assertNotNull(mTfs.getFile("/testFolder1/testFolder2/testFile2"));
    mFsShell.rm(new String[]{"rm","/testFolder1/testFolder2/testFile2"});
    toCompare.append(getCommandOutput(new String[]{"rm","/testFolder1/testFolder2/testFile2"}));
    Assert.assertEquals(toCompare.toString(),mOutput.toString());
    Assert.assertNotNull(mTfs.getFile("/testFolder1"));
    Assert.assertNotNull(mTfs.getFile("/testFolder1/testFolder2"));
    Assert.assertNull(mTfs.getFile("/testFolder1/testFolder2/testFile2"));
    mFsShell.rm(new String[]{"rm","/testFolder1"});
    toCompare.append(getCommandOutput(new String[]{"rm","/testFolder1"}));
    Assert.assertEquals(toCompare.toString(),mOutput.toString());
    Assert.assertNull(mTfs.getFile("/testFolder1"));
    Assert.assertNull(mTfs.getFile("/testFolder1/testFolder2"));
    Assert.assertNull(mTfs.getFile("/testFolder1/testFolder2/testFile2"));
  }
  