t0401: test post-command for alias, version, typo

When the top-level Git process is an alias, it doesn't load much config
and thus the postCommand.strategy config setting is not loaded properly.
This leads to the post-command hook being run more frequently than we want,
including an alias for 'git add' running the hook even when the worktree
did not change.

Similar state is not loaded by 'git version' or 'git typo'.

Signed-off-by: Derrick Stolee <stolee@gmail.com>

Author: derrickstolee

t/t0401-post-command-hook.sh

@@ -78,12 +78,42 @@ test_expect_success 'with post-index-change config' '
 	test_cmp expect post-index-change.out &&
 	test_path_is_missing post-command.out &&
 
+	# add keeps the worktree the same, so does not run post-command.
+	# and this should work through an alias.
+	git config alias.addalias add &&
+	rm -f post-command.out post-index-change.out &&
+	echo more stuff >>file &&
+	git addalias file &&
+	test_cmp expect post-index-change.out &&
+
+	# TODO: This is the opposite of what we want! We want this to
+	# be missing, but the current state has this happening in this
+	# way.
+	test_path_exists post-command.out &&
+
 	echo stuff >>file &&
 	# reset --hard updates the worktree.
+	# even through an alias
+	git config alias.resetalias "reset --hard" &&
 	rm -f post-command.out post-index-change.out &&
-	git reset --hard &&
+	git resetalias &&
 	test_cmp expect post-index-change.out &&
-	test_cmp expect post-command.out
+	test_cmp expect post-command.out &&
+
+	# TODO: We want to skip the post-command hook here!
+	rm -f post-command.out &&
+	test_must_fail git && # get help text
+	test_path_exists post-command.out &&
+
+	# TODO: We want to skip the post-command hook here!
+	rm -f post-command.out &&
+	git version &&
+	test_path_exists post-command.out &&
+
+	# TODO: We want to skip the post-command hook here!
+	rm -f post-command.out &&
+	test_must_fail git typo &&
+	test_path_exists post-command.out
 '
 
 test_done