commandParameters.setString(CommandParameter.MESSAGE, "commit message");

        CheckInScmResult checkinResult =
                getScmManager().checkIn(getScmRepository(), new ScmFileSet(getWorkingCopy()), commandParameters);

        assertResultIsSuccess(checkinResult);

        CheckOutScmResult checkoutResult =
                getScmManager().checkOut(getScmRepository(), new ScmFileSet(getAssertionCopy()));

        assertResultIsSuccess(checkoutResult);

        readmeTxt = new File(getAssertionCopy(), "readme.txt");

        assertEquals("check readme.txt contents", "changed file", FileUtils.fileRead(readmeTxt));

        deleteDirectory(getAssertionCopy());

        assertFalse("check previous assertion copy deleted", getAssertionCopy().exists());

        checkoutResult = getScmManager()
                .getProviderByUrl(getScmUrl())
                .checkOut(getScmRepository(), new ScmFileSet(getAssertionCopy()), new ScmBranch(branch));