[RFC/ PATCH 5/5] t7609: test merge and checkout error messages

@@ -0,0 +1,122 @@
+#!/bin/sh
+
+test_description='unpack-trees error messages'
+
+. ./test-lib.sh
+
+
+test_expect_success 'setup' '
+	echo one >one &&
+	git add one &&
+	git commit -a -m First &&
+
+	git checkout -b branch &&
+	echo two>two &&
+	echo three>three &&
+	echo four>four &&
+	echo five>five &&
+	git add two three four five &&
+	git commit -m Second &&
+
+	git checkout master &&
+	echo other>two &&
+	echo other>three &&
+	echo other>four &&
+	echo other>five
+'
+
+cat> expect <<EOF
+error: Untracked working tree files:
+	two
+	three
+	four
+	five
+would be overwritten by merge.
+EOF
+
+test_expect_success 'untracked files overwritten by merge' '
+	! git merge branch 2> out &&
+	test_cmp out expect
+'
+
+cat> expect <<EOF
+error: Your local changes to the files:
+	two
+	three
+	four
+would be overwritten by merge.
+Please, commit your changes or stash them before you can merge.
+error: Untracked working tree files:
+	five
+would be overwritten by merge.
+EOF
+
+test_expect_success 'untracked files or local changes ovewritten by merge' '
+	git add two &&
+	git add three &&
+	git add four &&
+	! git merge branch 2> out &&
+	test_cmp out expect
+'
+
+cat> expect <<EOF
+error: You have local changes to:
+	rep/two
+	rep/one
+cannot switch branches.
+EOF
+
+test_expect_success 'cannot switch branches because of local changes' '
+	git add five &&
+	mkdir rep &&
+	echo one>rep/one &&
+	echo two>rep/two &&
+	git add rep/one rep/two &&
+	git commit -m Fourth &&
+	git checkout master &&
+	echo uno>rep/one &&
+	echo dos>rep/two &&
+	! git checkout branch 2> out &&
+	test_cmp out expect
+'
+
+cat> expect <<EOF
+error: Entry 'rep/one' would be overwritten by merge. Cannot merge.
+error: Entry 'rep/two' would be overwritten by merge. Cannot merge.
+EOF
+
+test_expect_success 'not uptodate file plumbing error' '
+	git add rep/one rep/two &&
+	! git checkout branch 2> out &&
+	test_cmp out expect
+'
+
+cat> expect <<EOF
+error: Updating 'rep' would lose untracked files in it
+error: Updating 'rep2' would lose untracked files in it
+EOF
+
+test_expect_success 'not_uptodate_dir plumbing error' '
+	git init uptodate &&
+	cd uptodate &&
+	mkdir rep &&
+	mkdir rep2 &&
+	touch rep/foo &&
+	touch rep2/foo &&
+	git add rep/foo rep2/foo &&
+	git commit -m init &&
+	git checkout -b branch &&
+	git rm rep -r &&
+	git rm rep2 -r &&
+	touch rep &&
+	touch rep2 &&
+	git add rep rep2&&
+	git commit -m "added test as a file" &&
+	git checkout master &&
+	touch rep/untracked-file &&
+	touch rep2/untracked-file &&
+	! git checkout branch 2> out &&
+	test_cmp out ../expect
+'
+
+test_done