[PATCH 12/9 v5] t7800: add tests for difftool --dir-diff

[Tim Henigan <tim.henigan@gmail.com>]

Signed-off-by: Tim Henigan <tim.henigan@gmail.com>
---

This replaces 12/9 in the previous version of the series.

Changes in v5:

Based on an example provided by David Aguilar on the Git developer
list, the 'difftool --dir-diff from subdirectory' test is now wrapped
in parentheses "()".

>From David's email:
> If we wrap the subdir operations in parentheses, then the sub-shell
> saves us from having to do "cd ..".  It also helps prevent leakage
> from earlier failures, which is helpful when writing new tests.


 t/t7800-difftool.sh |   39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
index 41d8399..5f3ad3f 100755
--- a/t/t7800-difftool.sh
+++ b/t/t7800-difftool.sh
@@ -311,4 +311,43 @@ test_expect_success PERL 'difftool --tool-help' '
 	echo "$tool_help" | stdin_contains tool
 '
 
+test_expect_success PERL 'setup change in subdirectory' '
+	git checkout master &&
+	mkdir sub &&
+	echo master >sub/sub &&
+	git add sub/sub &&
+	git commit -m "added sub/sub" &&
+	echo test >>file &&
+	echo test >>sub/sub &&
+	git add . &&
+	git commit -m "modified both"
+'
+
+test_expect_success PERL 'difftool -d' '
+	diff=$(git difftool -d --extcmd ls branch) &&
+	echo "$diff" | stdin_contains sub &&
+	echo "$diff" | stdin_contains file
+'
+
+test_expect_success PERL 'difftool --dir-diff' '
+	diff=$(git difftool --dir-diff --extcmd ls branch) &&
+	echo "$diff" | stdin_contains sub &&
+	echo "$diff" | stdin_contains file
+'
+
+test_expect_success PERL 'difftool --dir-diff ignores --prompt' '
+	diff=$(git difftool --dir-diff --prompt --extcmd ls branch) &&
+	echo "$diff" | stdin_contains sub &&
+	echo "$diff" | stdin_contains file
+'
+
+test_expect_success PERL 'difftool --dir-diff from subdirectory' '
+	(
+		cd sub &&
+		diff=$(git difftool --dir-diff --extcmd ls branch) &&
+		echo "$diff" | stdin_contains sub &&
+		echo "$diff" | stdin_contains file
+	)
+'
+
 test_done
-- 
1.7.10.rc1.40.g756bbcd