Add test for git clean -e.

Signed-off-by: Jared Hance <jaredhance@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t7300-clean.sh b/t/t7300-clean.sh
index 7d8ed68..3a43571 100755
--- a/t/t7300-clean.sh
+++ b/t/t7300-clean.sh
@@ -438,4 +438,20 @@
 	! test -d bar
 '
 
+test_expect_success 'git clean -e' '
+	rm -fr repo &&
+	mkdir repo &&
+	(
+		cd repo &&
+		git init &&
+		touch 1 2 3 known &&
+		git add known &&
+		git clean -f -e 1 -e 2 &&
+		test -e 1 &&
+		test -e 2 &&
+		! (test -e 3) &&
+		test -e known
+	)
+'
+
 test_done