Add tests for pre-commit and commit-msg hooks

As desired, these pass for git-commit.sh, fail for builtin-commit (prior
to the fixes), and succeeded for builtin-commit (after the fixes).

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t7501-commit.sh

@@ -4,7 +4,7 @@
 #
 
 # FIXME: Test the various index usages, -i and -o, test reflog,
-# signoff, hooks
+# signoff
 
 test_description='git-commit'
 . ./test-lib.sh

t/t7503-pre-commit-hook.sh

@@ -0,0 +1,64 @@
+#!/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_failure "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

t/t7504-commit-msg-hook.sh

@@ -0,0 +1,88 @@
+#!/bin/sh
+
+test_description='commit-msg 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/commit-msg"
+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_failure "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 "$HOOK"
+test_expect_success "with non-executable hook" \
+	"echo 'content' >> file &&
+	 git add file &&
+	 git commit -m 'content'"
+
+test_expect_success "--no-verify with non-executable hook" \
+	"echo 'more content' >> file &&
+	 git add file &&
+	 git commit --no-verify -m 'more content'"
+
+# now a hook that edits the commit message
+cat > "$HOOK" <<'EOF'
+#!/bin/sh
+echo "new message" > "$1"
+exit 0
+EOF
+chmod +x "$HOOK"
+
+commit_msg_is () {
+	test "`git log --pretty=format:%s%b -1`" = "$1"
+}
+
+test_expect_success "hook edits commit message" \
+	"echo 'additional' >> file &&
+	 git add file &&
+	 git commit -m 'additional' &&
+	 commit_msg_is 'new message'"
+
+test_expect_success "hook doesn't edit commit message" \
+	"echo 'plus' >> file &&
+	 git add file &&
+	 git commit --no-verify -m 'plus' &&
+	 commit_msg_is 'plus'"
+
+test_done