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[PATCH 04/11] t3030-merge-recursive: don't check the stderr of a subshell

From
SZEDER Gábor <szeder.dev@gmail.com>
Date
Feb 23, 2018, 23:39 UTC
Message-ID
<20180223233951.11154-5-szeder.dev@gmail.com>
In-Reply-To
<20180223233951.11154-1-szeder.dev@gmail.com>

The two test checking 'git mmerge-recursive' in an empty worktree in 't3030-merge-recursive.sh' fail when the test script is run with '-x' tracing (and using a shell other than a Bash version supporting BASH_XTRACEFD). The reason for those failures is that the tests check the emptiness of a subshell's stderr, which includes the trace of commands executed in that subshell as well, throwing off the emptiness check.

Note that both subshells execute four git commands each, meaning that checking the emptiness of the whole subshell implicitly ensures that not only 'git merge-recursive' but none of the other three commands outputs anything to their stderr. Note also that if one of those commands were to output anything on its stderr, then the current combined check would not tell us which one of those four commands the unexpected output came from.

Save the stderr of those four commands only instead of the whole subshell, so it remains free from tracing output, and save and check them individually, so they will show us from which command the unexpected output came from.

After this change t3030 passes with '-x', even when running with /bin/sh.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
---
 t/t3030-merge-recursive.sh | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)
diff --git a/t/t3030-merge-recursive.sh b/t/t3030-merge-recursive.sh
index cdc38fe5d1..cbeea1cf94 100755
--- a/t/t3030-merge-recursive.sh
+++ b/t/t3030-merge-recursive.sh
@@ -525,20 +525,22 @@ test_expect_success 'merge-recursive w/ empty work tree - ours has rename' '
 		GIT_INDEX_FILE="$PWD/ours-has-rename-index" &&
 		export GIT_INDEX_FILE &&
 		mkdir "$GIT_WORK_TREE" &&
-		git read-tree -i -m $c7 &&
-		git update-index --ignore-missing --refresh &&
-		git merge-recursive $c0 -- $c7 $c3 &&
-		git ls-files -s >actual-files
-	) 2>actual-err &&
-	>expected-err &&
+		git read-tree -i -m $c7 2>actual-err &&
+		test_must_be_empty expected-err &&
+		git update-index --ignore-missing --refresh 2>actual-err &&
+		test_must_be_empty expected-err &&
+		git merge-recursive $c0 -- $c7 $c3 2>actual-err &&
+		test_must_be_empty expected-err &&
+		git ls-files -s >actual-files 2>actual-err &&
+		test_must_be_empty expected-err
+	) &&
 	cat >expected-files <<-EOF &&
 	100644 $o3 0	b/c
 	100644 $o0 0	c
 	100644 $o0 0	d/e
 	100644 $o0 0	e
 	EOF
-	test_cmp expected-files actual-files &&
-	test_cmp expected-err actual-err
+	test_cmp expected-files actual-files
 '
 
 test_expect_success 'merge-recursive w/ empty work tree - theirs has rename' '
@@ -548,20 +550,22 @@ test_expect_success 'merge-recursive w/ empty work tree - theirs has rename' '
 		GIT_INDEX_FILE="$PWD/theirs-has-rename-index" &&
 		export GIT_INDEX_FILE &&
 		mkdir "$GIT_WORK_TREE" &&
-		git read-tree -i -m $c3 &&
-		git update-index --ignore-missing --refresh &&
-		git merge-recursive $c0 -- $c3 $c7 &&
-		git ls-files -s >actual-files
-	) 2>actual-err &&
-	>expected-err &&
+		git read-tree -i -m $c3 2>actual-err &&
+		test_must_be_empty expected-err &&
+		git update-index --ignore-missing --refresh 2>>actual-err &&
+		test_must_be_empty expected-err &&
+		git merge-recursive $c0 -- $c3 $c7 2>>actual-err &&
+		test_must_be_empty expected-err &&
+		git ls-files -s >actual-files 2>>actual-err &&
+		test_must_be_empty expected-err
+	) &&
 	cat >expected-files <<-EOF &&
 	100644 $o3 0	b/c
 	100644 $o0 0	c
 	100644 $o0 0	d/e
 	100644 $o0 0	e
 	EOF
-	test_cmp expected-files actual-files &&
-	test_cmp expected-err actual-err
+	test_cmp expected-files actual-files
 '
 
 test_expect_success 'merge removes empty directories' '
-- 
2.16.2.400.g911b7cc0da
Previous: SZEDER GáborNext: Eric Sunshine
Message 10 of 26 in “Make the test suite pass with '-x' and /bin/sh”
  1. 00/11 Make the test suite pass with '-x' and /bin/shSZEDER Gábor, Feb 23, 2018
  2. 02/11 t: add means to disable '-x' tracing for individual test scriptsSZEDER Gábor, Feb 23, 2018
  3. 01/11 t: prevent '-x' tracing from interfering with test helpers' stderrSZEDER Gábor, Feb 23, 2018
  4. SZEDER GáborFeb 24, 2018
  5. t: prevent '-x' tracing from interfering with test helpers' stderrSZEDER Gábor, Feb 25, 2018
  6. 03/11 t1507-rev-parse-upstream: don't check the stderr of a shell functionSZEDER Gábor, Feb 23, 2018
  7. 05/11 t5500-fetch-pack: don't check the stderr of a subshellSZEDER Gábor, Feb 23, 2018
  8. 07/11 t5570-git-daemon: don't check the stderr of a subshellSZEDER Gábor, Feb 23, 2018
  9. 11/11 travis-ci: run tests with '-x' tracingSZEDER Gábor, Feb 23, 2018
  10. 04/11 t3030-merge-recursive: don't check the stderr of a subshellSZEDER Gábor, Feb 23, 2018
  11. Eric SunshineFeb 24, 2018
  12. Junio C HamanoFeb 27, 2018
  13. Junio C HamanoFeb 27, 2018
  14. test_must_be_empty: make sure the file exists, not just emptyJunio C Hamano, Feb 27, 2018
  15. Stefan BellerFeb 27, 2018
  16. Jeff KingFeb 27, 2018
  17. SZEDER GáborFeb 27, 2018
  18. Junio C HamanoFeb 27, 2018
  19. SZEDER GáborFeb 28, 2018
  20. 10/11 t/README: add a note about don't saving stderr of compound commandsSZEDER Gábor, Feb 23, 2018
  21. 08/11 t9903-bash-prompt: don't check the stderr of __git_ps1()SZEDER Gábor, Feb 23, 2018
  22. 06/11 t5526: use $TRASH_DIRECTORY to specify the path of GIT_TRACE log fileSZEDER Gábor, Feb 23, 2018
  23. 09/11 t1510-repo-setup: mark as untraceable with '-x'SZEDER Gábor, Feb 23, 2018
  24. SZEDER GáborMar 2, 2018
  25. Jeff KingMar 3, 2018
  26. SZEDER GáborMar 5, 2018

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