[GSoC PATCH 16/16] t2206: avoid suppressing git's exit code

[Trieu Huynh <vikingtc4@gmail.com>]

Update t2206-add-submodule-ignored.sh to redirect git-cmds output
to a temporary file instead of piping it directly to not hide the
exit code of git commands behind pipes, as a crash in git might
go unnoticed.

Some tests run inside a subdirectory that is itself a git repo and
use 'git add .' on the whole working tree, so the temporary file is
written as '../actual' to keep it outside the inner repo and prevent
it from being accidentally staged.

Signed-off-by: Trieu Huynh <vikingtc4@gmail.com>
---
 t/t2206-add-submodule-ignored.sh | 45 +++++++++++++++++++++-----------
 1 file changed, 30 insertions(+), 15 deletions(-)

diff --git a/t/t2206-add-submodule-ignored.sh b/t/t2206-add-submodule-ignored.sh
index e581e87ab2..7141012e50 100755
--- a/t/t2206-add-submodule-ignored.sh
+++ b/t/t2206-add-submodule-ignored.sh
@@ -45,9 +45,11 @@ test_expect_success 'main: add submodule with default config'  '
 	cd main &&
 	git submodule add ../sub &&
 	git commit -m "add submodule" &&
-	git log --oneline --name-only | grep "^sub$" &&
+	git log --oneline --name-only >actual &&
+	test_grep "^sub$" actual &&
 	git -C sub reset --hard v2.0 &&
-	git status --porcelain | grep "^ M sub$" &&
+	git status --porcelain >actual &&
+	test_grep "^ M sub$" actual &&
 	echo
 '
 #3
@@ -58,8 +60,10 @@ test_expect_success 'main: submodule config ignore=all'  '
 	git config -f .gitmodules submodule.sub.ignore all &&
 	GIT_TRACE=1 git add . &&
 	git commit -m "update submodule config sub.ignore all" &&
-	! git status --porcelain | grep "^.*$" &&
-	! git log --oneline --name-only | grep "^sub$" &&
+	git status --porcelain >../actual &&
+	test_must_be_empty ../actual &&
+	git log --oneline --name-only >../actual &&
+	test_grep ! "^sub$" ../actual &&
 	echo
 '
 #4
@@ -69,8 +73,10 @@ test_expect_success 'sub: change to different sha1 and check status in main'  '
 	cd "${base_path}" &&
 	cd main &&
 	git -C sub reset --hard v1.0 &&
-	! git status --porcelain | grep "^ M sub$" &&
-	git status --ignore-submodules=none --porcelain | grep "^ M sub$" &&
+	git status --porcelain >../actual &&
+	test_grep ! "^ M sub$" ../actual &&
+	git status --ignore-submodules=none --porcelain >../actual &&
+	test_grep "^ M sub$" ../actual &&
 	echo
 '
 
@@ -80,7 +86,8 @@ test_expect_success 'main: check normal add and status'  '
 	cd "${base_path}" &&
 	cd main &&
 	GIT_TRACE=1 git add . &&
-	! git status --porcelain | grep "^ M sub$" &&
+	git status --porcelain >../actual &&
+	test_grep ! "^ M sub$" ../actual &&
 	echo
 '
 
@@ -91,7 +98,8 @@ test_expect_success 'main: check --force add . and status'  '
 	cd "${base_path}" &&
 	cd main &&
 	GIT_TRACE=1 git add --force . &&
-	! git status --porcelain | grep "^M  sub$" &&
+	git status --porcelain >../actual &&
+	test_grep ! "^M  sub$" ../actual &&
 	echo
 '
 
@@ -101,8 +109,10 @@ test_expect_success 'main: check --force add . and status'  '
 test_expect_success 'main: check _add sub_ and status'  '
 	cd "${base_path}" &&
 	cd main &&
-	GIT_TRACE=1 git add sub 2>&1 | grep "Skipping submodule due to ignore=all: sub" &&
-	! git status --porcelain | grep "^M  sub$" &&
+	GIT_TRACE=1 git add sub >../actual 2>&1 &&
+	test_grep "Skipping submodule due to ignore=all: sub" ../actual &&
+	git status --porcelain >../actual &&
+	test_grep ! "^M  sub$" ../actual &&
 	echo
 '
 
@@ -118,15 +128,20 @@ test_expect_success 'main: check force add sub and ./sub/ and status'  '
 	cd main &&
 	echo "Adding with --force should work: git add --force sub" &&
 	GIT_TRACE=1 git add --force sub &&
-	git status --porcelain | grep "^M  sub$" &&
+	git status --porcelain >../actual &&
+	test_grep "^M  sub$" ../actual &&
 	git restore --staged sub &&
-	! git status --porcelain | grep "^M  sub$" &&
+	git status --porcelain >../actual &&
+	test_grep ! "^M  sub$" ../actual &&
 	echo "Adding with --force should work: git add --force ./sub/" &&
 	GIT_TRACE=1 git add --force ./sub/ &&
-	git status --porcelain | grep "^M  sub$" &&
+	git status --porcelain >../actual &&
+	test_grep "^M  sub$" ../actual &&
 	git commit -m "update submodule pointer" &&
-	! git status --porcelain | grep "^ M sub$" &&
-	git log --ignore-submodules=none --name-only --oneline | grep "^sub$" &&
+	git status --porcelain >../actual &&
+	test_grep ! "^ M sub$" ../actual &&
+	git log --ignore-submodules=none --name-only --oneline >../actual &&
+	test_grep "^sub$" ../actual &&
 	echo
 '
 
-- 
2.43.0