[GSOC][PATCH 1/1] t3701: Avoid suppression of exit status of git

[Edwin Fernando <edwinfernando734@gmail.com>]

Pipes and command substitution in bash suppress the exit codes of the
first executed command. In the test scripts errors when running git
should be exposed. Remove all such suppressions of git by writing
output to files, chaining commands with &&, or other means.

Signed-off-by: Edwin Fernando <edwinfernando734@gmail.com>
---
 t/t3701-add-interactive.sh | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/t/t3701-add-interactive.sh b/t/t3701-add-interactive.sh
index 3a99837d9b..80446b311d 100755
--- a/t/t3701-add-interactive.sh
+++ b/t/t3701-add-interactive.sh
@@ -292,8 +292,10 @@ test_expect_success FILEMODE 'patch does not affect mode' '
 	echo content >>file &&
 	chmod +x file &&
 	printf "n\\ny\\n" | git add -p &&
-	git show :file | grep content &&
-	git diff file | grep "new mode"
+	git show :file > show_file &&
+	grep content show_file &&
+	git diff file > diff_file &&
+	grep "new mode" diff_file
 '
 
 test_expect_success FILEMODE 'stage mode but not hunk' '
@@ -301,8 +303,10 @@ test_expect_success FILEMODE 'stage mode but not hunk' '
 	echo content >>file &&
 	chmod +x file &&
 	printf "y\\nn\\n" | git add -p &&
-	git diff --cached file | grep "new mode" &&
-	git diff          file | grep "+content"
+	git diff --cached file > diff_file &&
+	grep "new mode" diff_file &&
+	git diff file > diff_file &&
+	grep "+content" diff_file
 '
 
 
@@ -311,9 +315,12 @@ test_expect_success FILEMODE 'stage mode and hunk' '
 	echo content >>file &&
 	chmod +x file &&
 	printf "y\\ny\\n" | git add -p &&
-	git diff --cached file | grep "new mode" &&
-	git diff --cached file | grep "+content" &&
-	test -z "$(git diff file)"
+	git diff --cached file > diff_file &&
+	grep "new mode" diff_file &&
+	git diff --cached file diff_file &&
+	grep "+content" diff_file &&
+	git diff file > diff_file &&
+	test -z $(cat diff_file)
 '
 
 # end of tests disabled when filemode is not usable
@@ -970,8 +977,8 @@ test_expect_success 'handle submodules' '
 
 	force_color git -C for-submodules add -p dirty-head >output 2>&1 <y &&
 	git -C for-submodules ls-files --stage dirty-head >actual &&
-	rev="$(git -C for-submodules/dirty-head rev-parse HEAD)" &&
-	grep "$rev" actual
+	git -C for-submodules/dirty-head rev-parse HEAD > rev &&
+	grep -f rev actual
 '
 
 test_expect_success 'set up pathological context' '
-- 
2.40.0