t5600: modernize style

This is an old script which could use some updating before
we add to it:

  - use the standard line-breaking:

      test_expect_success 'title' '
              body
      '

  - run all code inside test_expect blocks to catch
    unexpected failures in setup steps

  - use "test_commit -C" instead of manually entering
    sub-repo

  - use test_when_finished for cleanup steps

  - test_path_is_* as appropriate

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t5600-clone-fail-cleanup.sh

@@ -11,42 +11,44 @@ remove the directory before attempting a clone again.'
 
 . ./test-lib.sh
 
-test_expect_success \
-    'clone of non-existent source should fail' \
-    'test_must_fail git clone foo bar'
+test_expect_success 'clone of non-existent source should fail' '
+	test_must_fail git clone foo bar
+'
 
-test_expect_success \
-    'failed clone should not leave a directory' \
-    '! test -d bar'
+test_expect_success 'failed clone should not leave a directory' '
+	test_path_is_missing bar
+'
 
-# Need a repo to clone
-test_create_repo foo
+test_expect_success 'create a repo to clone' '
+	test_create_repo foo
+'
 
-# create some objects so that we can corrupt the repo later
-(cd foo && touch file && git add file && git commit -m 'add file' >/dev/null 2>&1)
+test_expect_success 'create objects in repo for later corruption' '
+	test_commit -C foo file
+'
 
 # source repository given to git clone should be relative to the
 # current path not to the target dir
-test_expect_success \
-    'clone of non-existent (relative to $PWD) source should fail' \
-    'test_must_fail git clone ../foo baz'
+test_expect_success 'clone of non-existent (relative to $PWD) source should fail' '
+	test_must_fail git clone ../foo baz
+'
 
-test_expect_success \
-    'clone should work now that source exists' \
-    'git clone foo bar'
+test_expect_success 'clone should work now that source exists' '
+	git clone foo bar
+'
 
-test_expect_success \
-    'successful clone must leave the directory' \
-    'test -d bar'
+test_expect_success 'successful clone must leave the directory' '
+	test_path_is_dir bar
+'
 
 test_expect_success 'failed clone --separate-git-dir should not leave any directories' '
+	test_when_finished "rmdir foo/.git/objects.bak" &&
 	mkdir foo/.git/objects.bak/ &&
+	test_when_finished "mv foo/.git/objects.bak/* foo/.git/objects/" &&
 	mv foo/.git/objects/* foo/.git/objects.bak/ &&
 	test_must_fail git clone --separate-git-dir gitdir foo worktree &&
-	test_must_fail test -e gitdir &&
-	test_must_fail test -e worktree &&
-	mv foo/.git/objects.bak/* foo/.git/objects/ &&
-	rmdir foo/.git/objects.bak
+	test_path_is_missing gitdir &&
+	test_path_is_missing worktree
 '
 
 test_done