t: add tests for error conditions with --pathspec-from-file

Also move some old tests into the new tests: it doesn't seem reasonable
to have individual error condition tests.

Old test for `git commit` was corrected, previously it was instructed
to use stdin but wasn't provided with any stdin. While this works at
the moment, it's not exactly perfect.

Old tests for `git reset` were improved to test for a specific error
message.

Suggested-By: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t2026-checkout-pathspec-file.sh

@@ -136,4 +136,21 @@ test_expect_success 'only touches what was listed' '
 	verify_expect
 '
 
+test_expect_success 'error conditions' '
+	restore_checkpoint &&
+	echo fileA.t >list &&
+
+	test_must_fail git checkout --pathspec-from-file=list --detach 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with --detach" err &&
+
+	test_must_fail git checkout --pathspec-from-file=list --patch 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with --patch" err &&
+
+	test_must_fail git checkout --pathspec-from-file=list -- fileA.t 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with pathspec arguments" err &&
+
+	test_must_fail git checkout --pathspec-file-nul 2>err &&
+	test_i18ngrep -e "--pathspec-file-nul requires --pathspec-from-file" err
+'
+
 test_done

t/t2072-restore-pathspec-file.sh

@@ -136,4 +136,22 @@ test_expect_success 'only touches what was listed' '
 	verify_expect
 '
 
+test_expect_success 'error conditions' '
+	restore_checkpoint &&
+	echo fileA.t >list &&
+	>empty_list &&
+
+	test_must_fail git restore --pathspec-from-file=list --patch --source=HEAD^1 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with --patch" err &&
+
+	test_must_fail git restore --pathspec-from-file=list --source=HEAD^1 -- fileA.t 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with pathspec arguments" err &&
+
+	test_must_fail git restore --pathspec-file-nul --source=HEAD^1 2>err &&
+	test_i18ngrep -e "--pathspec-file-nul requires --pathspec-from-file" err &&
+
+	test_must_fail git restore --pathspec-from-file=empty_list --source=HEAD^1 2>err &&
+	test_i18ngrep -e "you must specify path(s) to restore" err
+'
+
 test_done

t/t3704-add-pathspec-file.sh

@@ -124,4 +124,29 @@ test_expect_success 'only touches what was listed' '
 	verify_expect
 '
 
+test_expect_success 'error conditions' '
+	restore_checkpoint &&
+	echo fileA.t >list &&
+	>empty_list &&
+
+	test_must_fail git add --pathspec-from-file=list --interactive 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with --interactive/--patch" err &&
+
+	test_must_fail git add --pathspec-from-file=list --patch 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with --interactive/--patch" err &&
+
+	test_must_fail git add --pathspec-from-file=list --edit 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with --edit" err &&
+
+	test_must_fail git add --pathspec-from-file=list -- fileA.t 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with pathspec arguments" err &&
+
+	test_must_fail git add --pathspec-file-nul 2>err &&
+	test_i18ngrep -e "--pathspec-file-nul requires --pathspec-from-file" err &&
+
+	# This case succeeds, but still prints to stderr
+	git add --pathspec-from-file=empty_list 2>err &&
+	test_i18ngrep -e "Nothing specified, nothing added." err
+'
+
 test_done

t/t7107-reset-pathspec-file.sh

@@ -128,15 +128,6 @@ test_expect_success 'quotes not compatible with --pathspec-file-nul' '
 	test_must_fail verify_expect
 '
 
-test_expect_success '--pathspec-from-file is not compatible with --soft or --hard' '
-	restore_checkpoint &&
-
-	git rm fileA.t &&
-	echo fileA.t >list &&
-	test_must_fail git reset --soft --pathspec-from-file=list &&
-	test_must_fail git reset --hard --pathspec-from-file=list
-'
-
 test_expect_success 'only touches what was listed' '
 	restore_checkpoint &&
 
@@ -152,4 +143,25 @@ test_expect_success 'only touches what was listed' '
 	verify_expect
 '
 
+test_expect_success 'error conditions' '
+	restore_checkpoint &&
+	echo fileA.t >list &&
+	git rm fileA.t &&
+
+	test_must_fail git reset --pathspec-from-file=list --patch 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with --patch" err &&
+
+	test_must_fail git reset --pathspec-from-file=list -- fileA.t 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with pathspec arguments" err &&
+
+	test_must_fail git reset --pathspec-file-nul 2>err &&
+	test_i18ngrep -e "--pathspec-file-nul requires --pathspec-from-file" err &&
+
+	test_must_fail git reset --soft --pathspec-from-file=list 2>err &&
+	test_i18ngrep -e "fatal: Cannot do soft reset with paths" err &&
+
+	test_must_fail git reset --hard --pathspec-from-file=list 2>err &&
+	test_i18ngrep -e "fatal: Cannot do hard reset with paths" err
+'
+
 test_done

t/t7526-commit-pathspec-file.sh

@@ -127,10 +127,31 @@ test_expect_success 'only touches what was listed' '
 	verify_expect
 '
 
-test_expect_success '--pathspec-from-file and --all cannot be used together' '
+test_expect_success 'error conditions' '
 	restore_checkpoint &&
-	test_must_fail git commit --pathspec-from-file=- --all -m "Commit" 2>err &&
-	test_i18ngrep "[-]-pathspec-from-file with -a does not make sense" err
+	echo fileA.t >list &&
+	>empty_list &&
+
+	test_must_fail git commit --pathspec-from-file=list --interactive -m "Commit" 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with --interactive/--patch" err &&
+
+	test_must_fail git commit --pathspec-from-file=list --patch -m "Commit" 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with --interactive/--patch" err &&
+
+	test_must_fail git commit --pathspec-from-file=list --all -m "Commit" 2>err &&
+	test_i18ngrep -e "--pathspec-from-file with -a does not make sense" err &&
+
+	test_must_fail git commit --pathspec-from-file=list -m "Commit" -- fileA.t 2>err &&
+	test_i18ngrep -e "--pathspec-from-file is incompatible with pathspec arguments" err &&
+
+	test_must_fail git commit --pathspec-file-nul -m "Commit" 2>err &&
+	test_i18ngrep -e "--pathspec-file-nul requires --pathspec-from-file" err &&
+
+	test_must_fail git commit --pathspec-from-file=empty_list --include -m "Commit" 2>err &&
+	test_i18ngrep -e "No paths with --include/--only does not make sense." err &&
+
+	test_must_fail git commit --pathspec-from-file=empty_list --only -m "Commit" 2>err &&
+	test_i18ngrep -e "No paths with --include/--only does not make sense." err
 '
 
 test_done