[PATCH v5 7/8] t3437: test script for fixup [-C|-c] options in interactive rebase

[Charvi Mendiratta <charvi077@gmail.com>]

Original-patch-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Charvi Mendiratta <charvi077@gmail.com>
---
 t/lib-rebase.sh                   |   8 +-
 t/t3437-rebase-fixup-options.sh   | 133 ++++++++++++++++++++++++++++++
 t/t3437/expected-combined-message |  19 +++++
 3 files changed, 158 insertions(+), 2 deletions(-)
 create mode 100755 t/t3437-rebase-fixup-options.sh
 create mode 100644 t/t3437/expected-combined-message

diff --git a/t/lib-rebase.sh b/t/lib-rebase.sh
index b72c051f47..d9afed7b47 100644
--- a/t/lib-rebase.sh
+++ b/t/lib-rebase.sh
@@ -4,6 +4,7 @@
 #
 # - override the commit message with $FAKE_COMMIT_MESSAGE
 # - amend the commit message with $FAKE_COMMIT_AMEND
+# - copy the original commit message to a file with $FAKE_MESSAGE_COPY
 # - check that non-commit messages have a certain line count with $EXPECT_COUNT
 # - check the commit count in the commit message header with $EXPECT_HEADER_COUNT
 # - rewrite a rebase -i script as directed by $FAKE_LINES.
@@ -14,8 +15,8 @@
 #       specified line.
 #
 #   "<cmd> <lineno>" -- add a line with the specified command
-#       ("pick", "squash", "fixup", "edit", "reword" or "drop") and the
-#       SHA1 taken from the specified line.
+#       ("pick", "squash", "fixup"|"fixup-C"|"fixup-c", "edit", "reword" or "drop")
+#       and the SHA1 taken from the specified line.
 #
 #   "exec_cmd_with_args" -- add an "exec cmd with args" line.
 #
@@ -33,6 +34,7 @@ set_fake_editor () {
 			exit
 		test -z "$FAKE_COMMIT_MESSAGE" || echo "$FAKE_COMMIT_MESSAGE" > "$1"
 		test -z "$FAKE_COMMIT_AMEND" || echo "$FAKE_COMMIT_AMEND" >> "$1"
+		test -z "$FAKE_MESSAGE_COPY" || cat "$1" >"$FAKE_MESSAGE_COPY"
 		exit
 		;;
 	esac
@@ -51,6 +53,8 @@ set_fake_editor () {
 			action="$line";;
 		exec_*|x_*|break|b)
 			echo "$line" | sed 's/_/ /g' >> "$1";;
+		fixup-*)
+			action=$(echo "$line" | sed 's/-/ -/');;
 		"#")
 			echo '# comment' >> "$1";;
 		">")
diff --git a/t/t3437-rebase-fixup-options.sh b/t/t3437-rebase-fixup-options.sh
new file mode 100755
index 0000000000..c2875803af
--- /dev/null
+++ b/t/t3437-rebase-fixup-options.sh
@@ -0,0 +1,133 @@
+#!/bin/sh
+#
+# Copyright (c) 2018 Phillip Wood
+#
+
+test_description='git rebase interactive fixup options
+
+This test checks the "fixup [-C|-c]" command of rebase interactive.
+In addition to amending the contents of the commit, "fixup -C"
+replaces the original commit message with the message of the fixup
+commit. "fixup -c" also replaces the original message, but opens the
+editor to allow the user to edit the message before committing.
+'
+
+. ./test-lib.sh
+
+. "$TEST_DIRECTORY"/lib-rebase.sh
+
+EMPTY=""
+
+# test_commit_message <rev> -m <msg>
+# test_commit_message <rev> <path>
+# Verify that the commit message of <rev> matches
+# <msg> or the content of <path>.
+test_commit_message () {
+	git show --no-patch --pretty=format:%B "$1" >actual &&
+	case "$2" in
+	-m) echo "$3" >expect &&
+	    test_cmp expect actual ;;
+	*) test_cmp "$2" actual ;;
+	esac
+}
+
+test_expect_success 'setup' '
+	cat >message <<-EOF &&
+	new subject
+	$EMPTY
+	new
+	body
+	EOF
+	test_commit A A &&
+	test_commit B B &&
+
+	set_fake_editor &&
+	git checkout -b test-branch &&
+	test_commit "$(cat message)" A A1 A1 &&
+	test_commit A2 A &&
+	test_commit A3 A &&
+	git checkout -b conflicts-branch A &&
+	test_commit conflicts A
+'
+
+test_expect_success 'simple fixup -C works' '
+	test_when_finished "test_might_fail git rebase --abort" &&
+	git checkout --detach A1 &&
+	git log -1 --pretty=format:%B >expected-message &&
+	FAKE_LINES="1 fixup-C 2 " git rebase -i A &&
+	test_cmp_rev HEAD^ A &&
+	test_cmp_rev HEAD^{tree} A1^{tree} &&
+	test_commit_message HEAD expected-message
+'
+
+test_expect_success 'simple fixup -c works' '
+	test_when_finished "test_might_fail git rebase --abort" &&
+	git checkout --detach A2 &&
+	git log -1 --pretty=format:%B HEAD~ >expected-message &&
+	test_write_lines "" "Modified A1" >>expected-message &&
+	FAKE_LINES="1 fixup-c 2 3" \
+		FAKE_COMMIT_AMEND="Modified A1" \
+		git rebase -i A &&
+	test_cmp_rev HEAD^{tree} A2^{tree} &&
+	test_commit_message HEAD~ expected-message
+'
+
+test_expect_success 'fixup -C with conflicts gives correct message' '
+	test_when_finished "test_might_fail git rebase --abort" &&
+	git checkout --detach A1 &&
+	git log -1 --pretty=format:%B HEAD >expected-message &&
+	test_write_lines "" "edited" >>expected-message &&
+	test_must_fail env FAKE_LINES="1 fixup-C 2" git rebase -i conflicts &&
+	git checkout --theirs -- A &&
+	git add A &&
+	FAKE_COMMIT_AMEND=edited git rebase --continue &&
+	test_cmp_rev HEAD^ conflicts &&
+	test_cmp_rev HEAD^{tree} A1^{tree} &&
+	test_commit_message HEAD expected-message
+'
+
+test_expect_success 'skipping fixup -C after fixup gives correct message' '
+	test_when_finished "test_might_fail git rebase --abort" &&
+	git checkout --detach A3 &&
+	test_must_fail env FAKE_LINES="1 fixup 2 fixup-C 4" git rebase -i A &&
+	git reset --hard &&
+	FAKE_COMMIT_AMEND=edited git rebase --continue &&
+	test_commit_message HEAD -m "B"
+'
+
+test_expect_success 'first fixup -C commented out in sequence fixup fixup -C fixup -C' '
+	test_when_finished "test_might_fail git rebase --abort" &&
+	git checkout --detach A3 &&
+	git log -1 --pretty=format:%B >expected-message &&
+	FAKE_LINES="1 fixup 2 fixup-C 3 fixup-C 4" git rebase -i A &&
+	test_cmp_rev HEAD^ A &&
+	test_commit_message HEAD expected-message
+'
+
+test_expect_success 'multiple fixup -c opens editor once' '
+	test_when_finished "test_might_fail git rebase --abort" &&
+	git checkout --detach A3 &&
+	base=$(git rev-parse HEAD~4) &&
+	FAKE_COMMIT_MESSAGE="Modified-A3" \
+		FAKE_LINES="1 fixup-C 2 fixup-c 3 fixup-c 4" \
+		EXPECT_HEADER_COUNT=4 \
+		git rebase -i $base &&
+	test_commit_message HEAD -m "Modified-A3" &&
+	test_cmp_rev $base HEAD^ &&
+	git show > raw &&
+	grep Modified-A3 raw >out &&
+	test_line_count = 1 out
+'
+
+test_expect_success 'sequence squash, fixup & fixup -c gives combined message' '
+	test_when_finished "test_might_fail git rebase --abort" &&
+	git checkout --detach A3 &&
+	FAKE_LINES="1 squash 2 fixup 3 fixup-c 4" \
+		FAKE_MESSAGE_COPY=actual-combined-message \
+		git -c commit.status=false rebase -i A &&
+	test_i18ncmp "$TEST_DIRECTORY/t3437/expected-combined-message" \
+		actual-combined-message &&
+	test_cmp_rev HEAD^ A
+'
+
+test_done
diff --git a/t/t3437/expected-combined-message b/t/t3437/expected-combined-message
new file mode 100644
index 0000000000..d21bd1b6bb
--- /dev/null
+++ b/t/t3437/expected-combined-message
@@ -0,0 +1,19 @@
+# This is a combination of 4 commits.
+# This is the 1st commit message:
+
+B
+
+# This is the commit message #2:
+
+new subject
+
+new
+body
+
+# The commit message #3 will be skipped:
+
+# A2
+
+# This is the commit message #4:
+
+A3
-- 
2.29.0.rc1