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| author |  Jeff King <peff@peff.net> | 2020-01-16 13:19:40 -0500 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2020-01-16 14:48:26 -0800 |
| commit | e4837b4406ae7a7192e22359dc94d69b8a8ef69d (patch) | |
| tree | 919740ea7ba0c72d8b912cd12c7b495f28926a80 /t | |
| parent | t4018: drop "debugging" cat from hunk-header tests (diff) | |
| download | tgif-e4837b4406ae7a7192e22359dc94d69b8a8ef69d.tar.xz | |
t7800: don't rely on reuse_worktree_file()
A test in t7800 tries to make sure that when git-difftool runs an
external tool that fails, it stops looking at files. Our fake failing
tool prints the file name it was asked to diff before exiting non-zero,
and then we confirm the output contains only that file.
However, this subtly relies on our internal reuse_worktree_file().
Because we're diffing between branches, the command run by difftool
might see:
- the git-stored filename (e.g., "file"), if we decided that the
working tree contents were up-to-date with the object in the index
and HEAD, and we could reuse them
- a temporary filename (e.g. "/tmp/abc123_file") if we had to dump the
contents from the object database
If the latter case happens, then the test fails, because it's expecting
the string "file". I discovered this when debugging something unrelated
with reuse_worktree_file(). I _thought_ it should be able to be
triggered by a racy-git situation, but running:
./t7800-difftool.sh --stress --run=2,13
never seems to fail. However, by my reading of reuse_worktree_file(),
this would probably always fail under Cygwin, because it sets
NO_FAST_WORKING_DIRECTORY. At any rate, since reuse_worktree_file()
is meant to be an optimization that may or may not trigger, our test
should be robust either way.
Instead of checking the filename, let's just make sure we got a single
line of output (which would not be true if we continued after the first
failure).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't')
| -rwxr-xr-x | t/t7800-difftool.sh | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh index 6bac9ed180..29b92907e2 100755 --- a/t/t7800-difftool.sh +++ b/t/t7800-difftool.sh @@ -125,15 +125,14 @@ test_expect_success 'difftool stops on error with --trust-exit-code' ' test_when_finished "rm -f for-diff .git/fail-right-file" && test_when_finished "git reset -- for-diff" && write_script .git/fail-right-file <<-\EOF && - echo "$2" + echo failed exit 1 EOF >for-diff && git add for-diff && - echo file >expect && test_must_fail git difftool -y --trust-exit-code \ --extcmd .git/fail-right-file branch >actual && - test_cmp expect actual + test_line_count = 1 actual ' test_expect_success 'difftool honors exit status if command not found' ' |