[Outreachy][PATCH v2] t6050: avoid pipes with downstream Git commands

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From: Chizoba ODINAKA <chizobajames21@xxxxxxxxx>

In pipes, the exit code of a chain of commands is determined by
the downstream command. In order not to loss the entire result code of tests,
write output of upstreams into a file.

Signed-off-by: Chizoba ODINAKA <chizobajames21@xxxxxxxxx>
---
Changes in v2:
- split multiple commands chain on the same line across multiple line,
  for easier readability
- replace "grep" with "test_grep", for more context in case of a "grep"
  failure

 t/t6050-replace.sh | 133 +++++++++++++++++++++++++++++----------------
 1 file changed, 87 insertions(+), 46 deletions(-)

diff --git a/t/t6050-replace.sh b/t/t6050-replace.sh
index d7702fc756..599b6bc66c 100755
--- a/t/t6050-replace.sh
+++ b/t/t6050-replace.sh
@@ -98,30 +98,43 @@ test_expect_success 'set up buggy branch' '
 '
 
 test_expect_success 'replace the author' '
-	git cat-file commit $HASH2 | grep "author A U Thor" &&
-	R=$(git cat-file commit $HASH2 | sed -e "s/A U/O/" | git hash-object -t commit --stdin -w) &&
-	git cat-file commit $R | grep "author O Thor" &&
+	git cat-file commit $HASH2 >actual &&
+	test_grep "author A U Thor" actual &&
+	git cat-file commit $HASH2 >actual &&
+	R=$(sed -e "s/A U/O/" actual | git hash-object -t commit --stdin -w) &&
+	git cat-file commit $R >actual &&
+	test_grep "author O Thor" actual &&
 	git update-ref refs/replace/$HASH2 $R &&
-	git show HEAD~5 | grep "O Thor" &&
-	git show $HASH2 | grep "O Thor"
+	git show HEAD~5 >actual &&
+	test_grep "O Thor" actual &&
+	git show $HASH2 >actual &&
+	test_grep "O Thor" actual
 '
 
 test_expect_success 'test --no-replace-objects option' '
-	git cat-file commit $HASH2 | grep "author O Thor" &&
-	git --no-replace-objects cat-file commit $HASH2 | grep "author A U Thor" &&
-	git show $HASH2 | grep "O Thor" &&
-	git --no-replace-objects show $HASH2 | grep "A U Thor"
+	git cat-file commit $HASH2 >actual &&
+	test_grep "author O Thor" actual &&
+	git --no-replace-objects cat-file commit $HASH2 >actual &&
+	test_grep "author A U Thor" actual &&
+	git show $HASH2 >actual &&
+	test_grep "O Thor" actual &&
+	git --no-replace-objects show $HASH2 >actual &&
+	test_grep "A U Thor" actual
 '
 
 test_expect_success 'test GIT_NO_REPLACE_OBJECTS env variable' '
-	GIT_NO_REPLACE_OBJECTS=1 git cat-file commit $HASH2 | grep "author A U Thor" &&
-	GIT_NO_REPLACE_OBJECTS=1 git show $HASH2 | grep "A U Thor"
+	GIT_NO_REPLACE_OBJECTS=1 git cat-file commit $HASH2 >actual &&
+	test_grep "author A U Thor"  actual &&
+	GIT_NO_REPLACE_OBJECTS=1 git show $HASH2 >actual &&
+	test_grep "A U Thor" actual
 '
 
 test_expect_success 'test core.usereplacerefs config option' '
 	test_config core.usereplacerefs false &&
-	git cat-file commit $HASH2 | grep "author A U Thor" &&
-	git show $HASH2 | grep "A U Thor"
+	git cat-file commit $HASH2 >actual &&
+	test_grep "author A U Thor" actual &&
+	git show $HASH2 >actual &&
+	test_grep "A U Thor" actual
 '
 
 cat >tag.sig <<EOF
@@ -148,14 +161,18 @@ test_expect_success 'repack, clone and fetch work' '
 	git clone --no-hardlinks . clone_dir &&
 	(
 		cd clone_dir &&
-		git show HEAD~5 | grep "A U Thor" &&
-		git show $HASH2 | grep "A U Thor" &&
+		git show HEAD~5 >actual &&
+		test_grep "A U Thor" actual &&
+		git show $HASH2 >actual &&
+		test_grep "A U Thor" actual &&
 		git cat-file commit $R &&
 		git repack -a -d &&
 		test_must_fail git cat-file commit $R &&
 		git fetch ../ "refs/replace/*:refs/replace/*" &&
-		git show HEAD~5 | grep "O Thor" &&
-		git show $HASH2 | grep "O Thor" &&
+		git show HEAD~5 >actual &&
+		test_grep "O Thor" actual &&
+		git show $HASH2 >actual &&
+		test_grep "O Thor" actual &&
 		git cat-file commit $R
 	)
 '
@@ -169,13 +186,15 @@ test_expect_success '"git replace" listing and deleting' '
 	test_must_fail git replace --delete &&
 	test_must_fail git replace -l -d $HASH2 &&
 	git replace -d $HASH2 &&
-	git show $HASH2 | grep "A U Thor" &&
+	git show $HASH2 >actual &&
+	test_grep "A U Thor" actual &&
 	test -z "$(git replace -l)"
 '
 
 test_expect_success '"git replace" replacing' '
 	git replace $HASH2 $R &&
-	git show $HASH2 | grep "O Thor" &&
+	git show $HASH2 >actual &&
+	test_grep "O Thor" actual &&
 	test_must_fail git replace $HASH2 $R &&
 	git replace -f $HASH2 $R &&
 	test_must_fail git replace -f &&
@@ -186,7 +205,8 @@ test_expect_success '"git replace" resolves sha1' '
 	SHORTHASH2=$(git rev-parse --short=8 $HASH2) &&
 	git replace -d $SHORTHASH2 &&
 	git replace $SHORTHASH2 $R &&
-	git show $HASH2 | grep "O Thor" &&
+	git show $HASH2 >actual &&
+	test_grep "O Thor" actual &&
 	test_must_fail git replace $HASH2 $R &&
 	git replace -f $HASH2 $R &&
 	test_must_fail git replace --force &&
@@ -209,10 +229,12 @@ test_expect_success '"git replace" resolves sha1' '
 #
 test_expect_success 'create parallel branch without the bug' '
 	git replace -d $HASH2 &&
-	git show $HASH2 | grep "A U Thor" &&
+	git show $HASH2 >actual &&
+	test_grep "A U Thor" actual &&
 	git checkout $HASH1 &&
 	git cherry-pick $HASH2 &&
-	git show $HASH5 | git apply &&
+	git show $HASH5 >actual &&
+	git apply actual &&
 	git commit --amend -m "hello: 4 more lines WITHOUT the bug" hello &&
 	PARA2=$(git rev-parse --verify HEAD) &&
 	git cherry-pick $HASH3 &&
@@ -225,7 +247,8 @@ test_expect_success 'create parallel branch without the bug' '
 	git checkout main &&
 	cur=$(git rev-parse --verify HEAD) &&
 	test "$cur" = "$HASH7" &&
-	git log --pretty=oneline | grep $PARA2 &&
+	git log --pretty=oneline >actual &&
+	test_grep $PARA2 actual &&
 	git remote add cloned ./clone_dir
 '
 
@@ -234,23 +257,31 @@ test_expect_success 'push to cloned repo' '
 	(
 		cd clone_dir &&
 		git checkout parallel &&
-		git log --pretty=oneline | grep $PARA2
+		git log --pretty=oneline >actual &&
+		test_grep $PARA2 actual
 	)
 '
 
 test_expect_success 'push branch with replacement' '
-	git cat-file commit $PARA3 | grep "author A U Thor" &&
-	S=$(git cat-file commit $PARA3 | sed -e "s/A U/O/" | git hash-object -t commit --stdin -w) &&
-	git cat-file commit $S | grep "author O Thor" &&
+	git cat-file commit $PARA3 >actual &&
+	test_grep "author A U Thor" actual &&
+	git cat-file commit $PARA3 >actual &&
+	S=$(sed -e "s/A U/O/" actual | git hash-object -t commit --stdin -w) &&
+	git cat-file commit $S >actual &&
+	test_grep "author O Thor" actual &&
 	git replace $PARA3 $S &&
-	git show $HASH6~2 | grep "O Thor" &&
-	git show $PARA3 | grep "O Thor" &&
+	git show $HASH6~2 >actual &&
+	test_grep "O Thor" actual &&
+	git show $PARA3 >actual &&
+	test_grep "O Thor" actual &&
 	git push cloned $HASH6^:refs/heads/parallel2 &&
 	(
 		cd clone_dir &&
 		git checkout parallel2 &&
-		git log --pretty=oneline | grep $PARA3 &&
-		git show $PARA3 | grep "A U Thor"
+		git log --pretty=oneline >actual &&
+		test_grep $PARA3 actual &&
+		git show $PARA3 >actual &&
+		test_grep "A U Thor" actual
 	)
 '
 
@@ -260,14 +291,14 @@ test_expect_success 'fetch branch with replacement' '
 		cd clone_dir &&
 		git fetch origin refs/heads/tofetch:refs/heads/parallel3 &&
 		git log --pretty=oneline parallel3 >output.txt &&
-		! grep $PARA3 output.txt &&
+		! test_grep $PARA3 output.txt &&
 		git show $PARA3 >para3.txt &&
-		grep "A U Thor" para3.txt &&
+		test_grep "A U Thor" para3.txt &&
 		git fetch origin "refs/replace/*:refs/replace/*" &&
 		git log --pretty=oneline parallel3 >output.txt &&
-		grep $PARA3 output.txt &&
+		test_grep $PARA3 output.txt &&
 		git show $PARA3 >para3.txt &&
-		grep "O Thor" para3.txt
+		test_grep "O Thor" para3.txt
 	)
 '
 
@@ -284,7 +315,7 @@ test_expect_success 'bisect and replacements' '
 '
 
 test_expect_success 'index-pack and replacements' '
-	git --no-replace-objects rev-list --objects HEAD |
+	git --no-replace-objects rev-list --objects HEAD >actual &&
 	git --no-replace-objects pack-objects test- &&
 	git index-pack test-*.pack
 '
@@ -319,7 +350,8 @@ test_expect_success '-f option bypasses the type check' '
 '
 
 test_expect_success 'git cat-file --batch works on replace objects' '
-	git replace | grep $PARA3 &&
+	git replace >actual &&
+	test_grep $PARA3 actual &&
 	echo $PARA3 | git cat-file --batch
 '
 
@@ -344,7 +376,8 @@ test_expect_success 'test --format medium' '
 		echo "$PARA3 -> $S" &&
 		echo "$MYTAG -> $HASH1"
 	} | sort >expected &&
-	git replace -l --format medium | sort >actual &&
+	git replace -l --format medium >actual &&
+	sort actual &&
 	test_cmp expected actual
 '
 
@@ -356,7 +389,8 @@ test_expect_success 'test --format long' '
 		echo "$PARA3 (commit) -> $S (commit)" &&
 		echo "$MYTAG (tag) -> $HASH1 (commit)"
 	} | sort >expected &&
-	git replace --format=long | sort >actual &&
+	git replace --format=long >actual &&
+	sort actual &&
 	test_cmp expected actual
 '
 
@@ -374,12 +408,16 @@ test_expect_success 'setup fake editors' '
 test_expect_success '--edit with and without already replaced object' '
 	test_must_fail env GIT_EDITOR=./fakeeditor git replace --edit "$PARA3" &&
 	GIT_EDITOR=./fakeeditor git replace --force --edit "$PARA3" &&
-	git replace -l | grep "$PARA3" &&
-	git cat-file commit "$PARA3" | grep "A fake Thor" &&
+	git replace -l >actual &&
+	test_grep "$PARA3" actual &&
+	git cat-file commit "$PARA3" >actual &&
+	test_grep "A fake Thor" actual &&
 	git replace -d "$PARA3" &&
 	GIT_EDITOR=./fakeeditor git replace --edit "$PARA3" &&
-	git replace -l | grep "$PARA3" &&
-	git cat-file commit "$PARA3" | grep "A fake Thor"
+	git replace -l >actual &&
+	test_grep "$PARA3" actual &&
+	git cat-file commit "$PARA3" >actual &&
+	test_grep "A fake Thor" actual
 '
 
 test_expect_success '--edit and change nothing or command failed' '
@@ -387,8 +425,10 @@ test_expect_success '--edit and change nothing or command failed' '
 	test_must_fail env GIT_EDITOR=true git replace --edit "$PARA3" &&
 	test_must_fail env GIT_EDITOR="./failingfakeeditor" git replace --edit "$PARA3" &&
 	GIT_EDITOR=./fakeeditor git replace --edit "$PARA3" &&
-	git replace -l | grep "$PARA3" &&
-	git cat-file commit "$PARA3" | grep "A fake Thor"
+	git replace -l >actual &&
+	test_grep "$PARA3" actual &&
+	git cat-file commit "$PARA3" >actual &&
+	test_grep "A fake Thor" actual
 '
 
 test_expect_success 'replace ref cleanup' '
@@ -468,7 +508,8 @@ test_expect_success GPG 'set up a merge commit with a mergetag' '
 	git checkout main &&
 	git merge -s ours test_tag &&
 	HASH10=$(git rev-parse --verify HEAD) &&
-	git cat-file commit $HASH10 | grep "^mergetag object"
+	git cat-file commit $HASH10 >actual &&
+	test_grep "^mergetag object" actual
 '
 
 test_expect_success GPG '--graft on a commit with a mergetag' '
-- 
2.34.1





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