--- /dev/null
+#!/bin/sh
+#
+# Copyright (c) 2008 Charles Bailey
+#
+
+test_description='git-mergetool
+
+Testing basic merge tool invocation'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+ echo master >file1 &&
+ git add file1 &&
+ git commit -m "added file1" &&
+ git checkout -b branch1 master &&
+ echo branch1 change >file1 &&
+ echo branch1 newfile >file2 &&
+ git add file1 file2 &&
+ git commit -m "branch1 changes" &&
+ git checkout -b branch2 master &&
+ echo branch2 change >file1 &&
+ echo branch2 newfile >file2 &&
+ git add file1 file2 &&
+ git commit -m "branch2 changes" &&
+ git checkout master &&
+ echo master updated >file1 &&
+ echo master new >file2 &&
+ git add file1 file2 &&
+ git commit -m "master updates"
+'
+
+test_expect_success 'custom mergetool' '
+ git config merge.tool mytool &&
+ git config mergetool.mytool.cmd "cat \"\$REMOTE\" >\"\$MERGED\"" &&
+ git config mergetool.mytool.trustExitCode true &&
+ git checkout branch1 &&
+ ! git merge master >/dev/null 2>&1 &&
+ ( yes "" | git mergetool file1>/dev/null 2>&1 ) &&
+ ( yes "" | git mergetool file2>/dev/null 2>&1 ) &&
+ test "$(cat file1)" = "master updated" &&
+ test "$(cat file2)" = "master new" &&
+ git commit -m "branch1 resolved with mergetool"
+'
+
+test_done