1 files changed, 84 insertions, 0 deletions
diff --git a/t/t0021-conversion.sh b/t/t0021-conversion.sh
new file mode 100755
index 0000000000..a839f4e074
--- /dev/null
+++ b/t/t0021-conversion.sh
@@ -0,0 +1,84 @@
+#!/bin/sh
+
+test_description='blob conversion via gitattributes'
+
+. ./test-lib.sh
+
+cat <<\EOF >rot13.sh
+tr '[a-zA-Z]' '[n-za-mN-ZA-M]'
+EOF
+chmod +x rot13.sh
+
+test_expect_success setup '
+	git config filter.rot13.smudge ./rot13.sh &&
+	git config filter.rot13.clean ./rot13.sh &&
+
+	{
+	    echo "*.t filter=rot13"
+	    echo "*.i ident"
+	} >.gitattributes &&
+
+	{
+	    echo a b c d e f g h i j k l m
+	    echo n o p q r s t u v w x y z
+	    echo '\''$Id$'\''
+	} >test &&
+	cat test >test.t &&
+	cat test >test.o &&
+	cat test >test.i &&
+	git add test test.t test.i &&
+	rm -f test test.t test.i &&
+	git checkout -- test test.t test.i
+'
+
+script='s/^\$Id: \([0-9a-f]*\) \$/\1/p'
+
+test_expect_success check '
+
+	cmp test.o test &&
+	cmp test.o test.t &&
+
+	# ident should be stripped in the repository
+	git diff --raw --exit-code :test :test.i &&
+	id=$(git rev-parse --verify :test) &&
+	embedded=$(sed -ne "$script" test.i) &&
+	test "z$id" = "z$embedded"
+'
+
+# If an expanded ident ever gets into the repository, we want to make sure that
+# it is collapsed before being expanded again on checkout
+test_expect_success expanded_in_repo '
+	{
+		echo "File with expanded keywords"
+		echo "\$Id\$"
+		echo "\$Id:\$"
+		echo "\$Id: 0000000000000000000000000000000000000000 \$"
+		echo "\$Id: NoSpaceAtEnd\$"
+		echo "\$Id:NoSpaceAtFront \$"
+		echo "\$Id:NoSpaceAtEitherEnd\$"
+		echo "\$Id: NoTerminatingSymbol"
+	} > expanded-keywords &&
+
+	{
+		echo "File with expanded keywords"
+		echo "\$Id: 4f21723e7b15065df7de95bd46c8ba6fb1818f4c \$"
+		echo "\$Id: 4f21723e7b15065df7de95bd46c8ba6fb1818f4c \$"
+		echo "\$Id: 4f21723e7b15065df7de95bd46c8ba6fb1818f4c \$"
+		echo "\$Id: 4f21723e7b15065df7de95bd46c8ba6fb1818f4c \$"
+		echo "\$Id: 4f21723e7b15065df7de95bd46c8ba6fb1818f4c \$"
+		echo "\$Id: 4f21723e7b15065df7de95bd46c8ba6fb1818f4c \$"
+		echo "\$Id: NoTerminatingSymbol"
+	} > expected-output &&
+
+	git add expanded-keywords &&
+	git commit -m "File with keywords expanded" &&
+
+	echo "expanded-keywords ident" >> .gitattributes &&
+
+	rm -f expanded-keywords &&
+	git checkout -- expanded-keywords &&
+	cat expanded-keywords &&
+	cmp expanded-keywords expected-output
+'
+
+test_done