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git/t/t7503-pre-commit-hook.sh
Junio C Hamano 41ac414ea2 Sane use of test_expect_failure
Originally, test_expect_failure was designed to be the opposite
of test_expect_success, but this was a bad decision.  Most tests
run a series of commands that leads to the single command that
needs to be tested, like this:

    test_expect_{success,failure} 'test title' '
	setup1 &&
        setup2 &&
        setup3 &&
        what is to be tested
    '

And expecting a failure exit from the whole sequence misses the
point of writing tests.  Your setup$N that are supposed to
succeed may have failed without even reaching what you are
trying to test.  The only valid use of test_expect_failure is to
check a trivial single command that is expected to fail, which
is a minority in tests of Porcelain-ish commands.

This large-ish patch rewrites all uses of test_expect_failure to
use test_expect_success and rewrites the condition of what is
tested, like this:

    test_expect_success 'test title' '
	setup1 &&
        setup2 &&
        setup3 &&
        ! this command should fail
    '

test_expect_failure is redefined to serve as a reminder that
that test *should* succeed but due to a known breakage in git it
currently does not pass.  So if git-foo command should create a
file 'bar' but you discovered a bug that it doesn't, you can
write a test like this:

    test_expect_failure 'git-foo should create bar' '
        rm -f bar &&
        git foo &&
        test -f bar
    '

This construct acts similar to test_expect_success, but instead
of reporting "ok/FAIL" like test_expect_success does, the
outcome is reported as "FIXED/still broken".

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-01 20:49:34 -08:00

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#!/bin/sh
test_description='pre-commit hook'
. ./test-lib.sh
test_expect_success 'with no hook' '
echo "foo" > file &&
git add file &&
git commit -m "first"
'
test_expect_success '--no-verify with no hook' '
echo "bar" > file &&
git add file &&
git commit --no-verify -m "bar"
'
# now install hook that always succeeds
HOOKDIR="$(git rev-parse --git-dir)/hooks"
HOOK="$HOOKDIR/pre-commit"
mkdir -p "$HOOKDIR"
cat > "$HOOK" <<EOF
#!/bin/sh
exit 0
EOF
chmod +x "$HOOK"
test_expect_success 'with succeeding hook' '
echo "more" >> file &&
git add file &&
git commit -m "more"
'
test_expect_success '--no-verify with succeeding hook' '
echo "even more" >> file &&
git add file &&
git commit --no-verify -m "even more"
'
# now a hook that fails
cat > "$HOOK" <<EOF
#!/bin/sh
exit 1
EOF
test_expect_success 'with failing hook' '
echo "another" >> file &&
git add file &&
! git commit -m "another"
'
test_expect_success '--no-verify with failing hook' '
echo "stuff" >> file &&
git add file &&
git commit --no-verify -m "stuff"
'
chmod -x "$HOOK"
test_expect_success 'with non-executable hook' '
echo "content" >> file &&
git add file &&
git commit -m "content"
'
test_expect_success '--no-verify with non-executable hook' '
echo "more content" >> file &&
git add file &&
git commit --no-verify -m "more content"
'
test_done