t4016: test quoting funny pathnames in diff output

Signed-off-by: Junio C Hamano <junkio@cox.net>

t/t4016-diff-quote.sh

@@ -0,0 +1,66 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Junio C Hamano
+#
+
+test_description='Quoting paths in diff output.
+'
+
+. ./test-lib.sh
+
+P0='pathname'
+P1='pathname	with HT'
+P2='pathname with SP'
+P3='pathname
+with LF'
+
+test_expect_success setup '
+	echo P0.0 >"$P0.0" &&
+	echo P0.1 >"$P0.1" &&
+	echo P0.2 >"$P0.2" &&
+	echo P0.3 >"$P0.3" &&
+	echo P1.0 >"$P1.0" &&
+	echo P1.2 >"$P1.2" &&
+	echo P1.3 >"$P1.3" &&
+	git add . &&
+	git commit -m initial &&
+	git mv "$P0.0" "R$P0.0" &&
+	git mv "$P0.1" "R$P1.0" &&
+	git mv "$P0.2" "R$P2.0" &&
+	git mv "$P0.3" "R$P3.0" &&
+	git mv "$P1.0" "R$P0.1" &&
+	git mv "$P1.2" "R$P2.1" &&
+	git mv "$P1.3" "R$P3.1" &&
+	:
+'
+
+cat >expect <<\EOF
+ rename pathname.1 => "Rpathname\twith HT.0" (100%)
+ rename pathname.3 => "Rpathname\nwith LF.0" (100%)
+ rename "pathname\twith HT.3" => "Rpathname\nwith LF.1" (100%)
+ rename pathname.2 => Rpathname with SP.0 (100%)
+ rename "pathname\twith HT.2" => Rpathname with SP.1 (100%)
+ rename pathname.0 => Rpathname.0 (100%)
+ rename "pathname\twith HT.0" => Rpathname.1 (100%)
+EOF
+test_expect_success 'git diff --summary -M HEAD' '
+	git diff --summary -M HEAD >actual &&
+	diff -u expect actual
+'
+
+cat >expect <<\EOF
+ pathname.1 => "Rpathname\twith HT.0"            |    0 
+ pathname.3 => "Rpathname\nwith LF.0"            |    0 
+ "pathname\twith HT.3" => "Rpathname\nwith LF.1" |    0 
+ pathname.2 => Rpathname with SP.0               |    0 
+ "pathname\twith HT.2" => Rpathname with SP.1    |    0 
+ pathname.0 => Rpathname.0                       |    0 
+ "pathname\twith HT.0" => Rpathname.1            |    0 
+ 7 files changed, 0 insertions(+), 0 deletions(-)
+EOF
+test_expect_success 'git diff --stat -M HEAD' '
+	git diff --stat -M HEAD >actual &&
+	diff -u expect actual
+'
+
+test_done