t/t4015-diff-whitespace.sh - jrn/git - Git at Google

 #!/bin/sh
 #
 # Copyright (c) 2006 Johannes E. Schindelin
 #

 test_description='Test special whitespace in diff engine.

 '
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/diff-lib.sh

 test_expect_success "Ray Lehtiniemi's example" '
 	cat <<-\EOF >x &&
 	do {
 	   nothing;
 	} while (0);
 	EOF
 	git update-index --add x &&

 	cat <<-\EOF >x &&
 	do
 	{
 	   nothing;
 	}
 	while (0);
 	EOF

 	cat <<-\EOF >expect &&
 	diff --git a/x b/x
 	index adf3937..6edc172 100644
 	--- a/x
 	+++ b/x
 	@@ -1,3 +1,5 @@
 	-do {
 	+do
 	+{
 	    nothing;
 	-} while (0);
 	+}
 	+while (0);
 	EOF

 	git diff >out &&
 	test_cmp expect out &&

 	git diff -w >out &&
 	test_cmp expect out &&

 	git diff -b >out &&
 	test_cmp expect out
 '

 test_expect_success 'another test, without options' '
 	tr Q "\015" <<-\EOF >x &&
 	whitespace at beginning
 	whitespace change
 	whitespace in the middle
 	whitespace at end
 	unchanged line
 	CR at endQ
 	EOF

 	git update-index x &&

 	tr "_" " " <<-\EOF >x &&
 	_	whitespace at beginning
 	whitespace 	 change
 	white space in the middle
 	whitespace at end__
 	unchanged line
 	CR at end
 	EOF

 	tr "Q_" "\015 " <<-\EOF >expect &&
 	diff --git a/x b/x
 	index d99af23..22d9f73 100644
 	--- a/x
 	+++ b/x
 	@@ -1,6 +1,6 @@
 	-whitespace at beginning
 	-whitespace change
 	-whitespace in the middle
 	-whitespace at end
 	+ 	whitespace at beginning
 	+whitespace 	 change
 	+white space in the middle
 	+whitespace at end__
 	 unchanged line
 	-CR at endQ
 	+CR at end
 	EOF

 	git diff >out &&
 	test_cmp expect out &&

 	>expect &&
 	git diff -w >out &&
 	test_cmp expect out &&

 	git diff -w -b >out &&
 	test_cmp expect out &&

 	git diff -w --ignore-space-at-eol >out &&
 	test_cmp expect out &&

 	git diff -w -b --ignore-space-at-eol >out &&
 	test_cmp expect out &&


 	tr "Q_" "\015 " <<-\EOF >expect &&
 	diff --git a/x b/x
 	index d99af23..22d9f73 100644
 	--- a/x
 	+++ b/x
 	@@ -1,6 +1,6 @@
 	-whitespace at beginning
 	+_	whitespace at beginning
 	 whitespace 	 change
 	-whitespace in the middle
 	+white space in the middle
 	 whitespace at end__
 	 unchanged line
 	 CR at end
 	EOF
 	git diff -b >out &&
 	test_cmp expect out &&

 	git diff -b --ignore-space-at-eol >out &&
 	test_cmp expect out &&

 	tr "Q_" "\015 " <<-\EOF >expect &&
 	diff --git a/x b/x
 	index d99af23..22d9f73 100644
 	--- a/x
 	+++ b/x
 	@@ -1,6 +1,6 @@
 	-whitespace at beginning
 	-whitespace change
 	-whitespace in the middle
 	+_	whitespace at beginning
 	+whitespace 	 change
 	+white space in the middle
 	 whitespace at end__
 	 unchanged line
 	 CR at end
 	EOF
 	git diff --ignore-space-at-eol >out &&
 	test_cmp expect out
 '

 test_expect_success 'ignore-blank-lines: only new lines' '
 	test_seq 5 >x &&
 	git update-index x &&
 	test_seq 5 | sed "/3/i\\
 " >x &&
 	git diff --ignore-blank-lines >out &&
 	>expect &&
 	test_cmp out expect
 '

 test_expect_success 'ignore-blank-lines: only new lines with space' '
 	test_seq 5 >x &&
 	git update-index x &&
 	test_seq 5 | sed "/3/i\\
  " >x &&
 	git diff -w --ignore-blank-lines >out &&
 	>expect &&
 	test_cmp out expect
 '

 test_expect_success 'ignore-blank-lines: after change' '
 	cat <<-\EOF >x &&
 	1
 	2

 	3
 	4
 	5

 	6
 	7
 	EOF
 	git update-index x &&
 	cat <<-\EOF >x &&
 	change

 	1
 	2
 	3
 	4
 	5
 	6

 	7
 	EOF
 	git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp &&
 	cat <<-\EOF >expected &&
 	diff --git a/x b/x
 	--- a/x
 	+++ b/x
 	@@ -1,6 +1,7 @@
 	+change
 	+
 	 1
 	 2
 	-
 	 3
 	 4
 	 5
 	EOF
 	compare_diff_patch expected out.tmp
 '

 test_expect_success 'ignore-blank-lines: before change' '
 	cat <<-\EOF >x &&
 	1
 	2

 	3
 	4
 	5
 	6
 	7
 	EOF
 	git update-index x &&
 	cat <<-\EOF >x &&

 	1
 	2
 	3
 	4
 	5

 	6
 	7
 	change
 	EOF
 	git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp &&
 	cat <<-\EOF >expected &&
 	diff --git a/x b/x
 	--- a/x
 	+++ b/x
 	@@ -4,5 +4,7 @@
 	 3
 	 4
 	 5
 	+
 	 6
 	 7
 	+change
 	EOF
 	compare_diff_patch expected out.tmp
 '

 test_expect_success 'ignore-blank-lines: between changes' '
 	cat <<-\EOF >x &&
 	1
 	2
 	3
 	4
 	5


 	6
 	7
 	8
 	9
 	10
 	EOF
 	git update-index x &&
 	cat <<-\EOF >x &&
 	change
 	1
 	2

 	3
 	4
 	5
 	6
 	7
 	8

 	9
 	10
 	change
 	EOF
 	git diff --ignore-blank-lines >out.tmp &&
 	cat <<-\EOF >expected &&
 	diff --git a/x b/x
 	--- a/x
 	+++ b/x
 	@@ -1,5 +1,7 @@
 	+change
 	 1
 	 2
 	+
 	 3
 	 4
 	 5
 	@@ -8,5 +8,7 @@
 	 6
 	 7
 	 8
 	+
 	 9
 	 10
 	+change
 	EOF
 	compare_diff_patch expected out.tmp
 '

 test_expect_success 'ignore-blank-lines: between changes (with interhunkctx)' '
 	test_seq 10 >x &&
 	git update-index x &&
 	cat <<-\EOF >x &&
 	change
 	1
 	2

 	3
 	4
 	5

 	6
 	7
 	8
 	9

 	10
 	change
 	EOF
 	git diff --inter-hunk-context=2 --ignore-blank-lines >out.tmp &&
 	cat <<-\EOF >expected &&
 	diff --git a/x b/x
 	--- a/x
 	+++ b/x
 	@@ -1,10 +1,15 @@
 	+change
 	 1
 	 2
 	+
 	 3
 	 4
 	 5
 	+
 	 6
 	 7
 	 8
 	 9
 	+
 	 10
 	+change
 	EOF
 	compare_diff_patch expected out.tmp
 '

 test_expect_success 'ignore-blank-lines: scattered spaces' '
 	test_seq 10 >x &&
 	git update-index x &&
 	cat <<-\EOF >x &&
 	change
 	1
 	2
 	3

 	4

 	5

 	6


 	7

 	8
 	9
 	10
 	change
 	EOF
 	git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp &&
 	cat <<-\EOF >expected &&
 	diff --git a/x b/x
 	--- a/x
 	+++ b/x
 	@@ -1,3 +1,4 @@
 	+change
 	 1
 	 2
 	 3
 	@@ -8,3 +15,4 @@
 	 8
 	 9
 	 10
 	+change
 	EOF
 	compare_diff_patch expected out.tmp
 '

 test_expect_success 'ignore-blank-lines: spaces coalesce' '
 	test_seq 6 >x &&
 	git update-index x &&
 	cat <<-\EOF >x &&
 	change
 	1
 	2
 	3

 	4

 	5

 	6
 	change
 	EOF
 	git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp &&
 	cat <<-\EOF >expected &&
 	diff --git a/x b/x
 	--- a/x
 	+++ b/x
 	@@ -1,6 +1,11 @@
 	+change
 	 1
 	 2
 	 3
 	+
 	 4
 	+
 	 5
 	+
 	 6
 	+change
 	EOF
 	compare_diff_patch expected out.tmp
 '

 test_expect_success 'ignore-blank-lines: mix changes and blank lines' '
 	test_seq 16 >x &&
 	git update-index x &&
 	cat <<-\EOF >x &&
 	change
 	1
 	2

 	3
 	4
 	5
 	change
 	6
 	7
 	8

 	9
 	10
 	11
 	change
 	12
 	13
 	14

 	15
 	16
 	change
 	EOF
 	git diff --ignore-blank-lines >out.tmp &&
 	cat <<-\EOF >expected &&
 	diff --git a/x b/x
 	--- a/x
 	+++ b/x
 	@@ -1,8 +1,11 @@
 	+change
 	 1
 	 2
 	+
 	 3
 	 4
 	 5
 	+change
 	 6
 	 7
 	 8
 	@@ -9,8 +13,11 @@
 	 9
 	 10
 	 11
 	+change
 	 12
 	 13
 	 14
 	+
 	 15
 	 16
 	+change
 	EOF
 	compare_diff_patch expected out.tmp
 '

 test_expect_success 'check mixed spaces and tabs in indent' '
 	# This is indented with SP HT SP.
 	echo " 	 foo();" >x &&
 	git diff --check | grep "space before tab in indent"
 '

 test_expect_success 'check mixed tabs and spaces in indent' '
 	# This is indented with HT SP HT.
 	echo "	 	foo();" >x &&
 	git diff --check | grep "space before tab in indent"
 '

 test_expect_success 'check with no whitespace errors' '
 	git commit -m "snapshot" &&
 	echo "foo();" >x &&
 	git diff --check
 '

 test_expect_success 'check with trailing whitespace' '
 	echo "foo(); " >x &&
 	test_must_fail git diff --check
 '

 test_expect_success 'check with space before tab in indent' '
 	# indent has space followed by hard tab
 	echo " 	foo();" >x &&
 	test_must_fail git diff --check
 '

 test_expect_success '--check and --exit-code are not exclusive' '
 	git checkout x &&
 	git diff --check --exit-code
 '

 test_expect_success '--check and --quiet are not exclusive' '
 	git diff --check --quiet
 '

 test_expect_success 'check staged with no whitespace errors' '
 	echo "foo();" >x &&
 	git add x &&
 	git diff --cached --check
 '

 test_expect_success 'check staged with trailing whitespace' '
 	echo "foo(); " >x &&
 	git add x &&
 	test_must_fail git diff --cached --check
 '

 test_expect_success 'check staged with space before tab in indent' '
 	# indent has space followed by hard tab
 	echo " 	foo();" >x &&
 	git add x &&
 	test_must_fail git diff --cached --check
 '

 test_expect_success 'check with no whitespace errors (diff-index)' '
 	echo "foo();" >x &&
 	git add x &&
 	git diff-index --check HEAD
 '

 test_expect_success 'check with trailing whitespace (diff-index)' '
 	echo "foo(); " >x &&
 	git add x &&
 	test_must_fail git diff-index --check HEAD
 '

 test_expect_success 'check with space before tab in indent (diff-index)' '
 	# indent has space followed by hard tab
 	echo " 	foo();" >x &&
 	git add x &&
 	test_must_fail git diff-index --check HEAD
 '

 test_expect_success 'check staged with no whitespace errors (diff-index)' '
 	echo "foo();" >x &&
 	git add x &&
 	git diff-index --cached --check HEAD
 '

 test_expect_success 'check staged with trailing whitespace (diff-index)' '
 	echo "foo(); " >x &&
 	git add x &&
 	test_must_fail git diff-index --cached --check HEAD
 '

 test_expect_success 'check staged with space before tab in indent (diff-index)' '
 	# indent has space followed by hard tab
 	echo " 	foo();" >x &&
 	git add x &&
 	test_must_fail git diff-index --cached --check HEAD
 '

 test_expect_success 'check with no whitespace errors (diff-tree)' '
 	echo "foo();" >x &&
 	git commit -m "new commit" x &&
 	git diff-tree --check HEAD^ HEAD
 '

 test_expect_success 'check with trailing whitespace (diff-tree)' '
 	echo "foo(); " >x &&
 	git commit -m "another commit" x &&
 	test_must_fail git diff-tree --check HEAD^ HEAD
 '

 test_expect_success 'check with space before tab in indent (diff-tree)' '
 	# indent has space followed by hard tab
 	echo " 	foo();" >x &&
 	git commit -m "yet another" x &&
 	test_must_fail git diff-tree --check HEAD^ HEAD
 '

 test_expect_success 'check trailing whitespace (trailing-space: off)' '
 	git config core.whitespace "-trailing-space" &&
 	echo "foo ();   " >x &&
 	git diff --check
 '

 test_expect_success 'check trailing whitespace (trailing-space: on)' '
 	git config core.whitespace "trailing-space" &&
 	echo "foo ();   " >x &&
 	test_must_fail git diff --check
 '

 test_expect_success 'check space before tab in indent (space-before-tab: off)' '
 	# indent contains space followed by HT
 	git config core.whitespace "-space-before-tab" &&
 	echo " 	foo ();" >x &&
 	git diff --check
 '

 test_expect_success 'check space before tab in indent (space-before-tab: on)' '
 	# indent contains space followed by HT
 	git config core.whitespace "space-before-tab" &&
 	echo " 	foo ();   " >x &&
 	test_must_fail git diff --check
 '

 test_expect_success 'check spaces as indentation (indent-with-non-tab: off)' '
 	git config core.whitespace "-indent-with-non-tab" &&
 	echo "        foo ();" >x &&
 	git diff --check
 '

 test_expect_success 'check spaces as indentation (indent-with-non-tab: on)' '
 	git config core.whitespace "indent-with-non-tab" &&
 	echo "        foo ();" >x &&
 	test_must_fail git diff --check
 '

 test_expect_success 'ditto, but tabwidth=9' '
 	git config core.whitespace "indent-with-non-tab,tabwidth=9" &&
 	git diff --check
 '

 test_expect_success 'check tabs and spaces as indentation (indent-with-non-tab: on)' '
 	git config core.whitespace "indent-with-non-tab" &&
 	echo "	                foo ();" >x &&
 	test_must_fail git diff --check
 '

 test_expect_success 'ditto, but tabwidth=10' '
 	git config core.whitespace "indent-with-non-tab,tabwidth=10" &&
 	test_must_fail git diff --check
 '

 test_expect_success 'ditto, but tabwidth=20' '
 	git config core.whitespace "indent-with-non-tab,tabwidth=20" &&
 	git diff --check
 '

 test_expect_success 'check tabs as indentation (tab-in-indent: off)' '
 	git config core.whitespace "-tab-in-indent" &&
 	echo "	foo ();" >x &&
 	git diff --check
 '

 test_expect_success 'check tabs as indentation (tab-in-indent: on)' '
 	git config core.whitespace "tab-in-indent" &&
 	echo "	foo ();" >x &&
 	test_must_fail git diff --check
 '

 test_expect_success 'check tabs and spaces as indentation (tab-in-indent: on)' '
 	git config core.whitespace "tab-in-indent" &&
 	echo "	                foo ();" >x &&
 	test_must_fail git diff --check
 '

 test_expect_success 'ditto, but tabwidth=1 (must be irrelevant)' '
 	git config core.whitespace "tab-in-indent,tabwidth=1" &&
 	test_must_fail git diff --check
 '

 test_expect_success 'check tab-in-indent and indent-with-non-tab conflict' '
 	git config core.whitespace "tab-in-indent,indent-with-non-tab" &&
 	echo "foo ();" >x &&
 	test_must_fail git diff --check
 '

 test_expect_success 'check tab-in-indent excluded from wildcard whitespace attribute' '
 	git config --unset core.whitespace &&
 	echo "x whitespace" >.gitattributes &&
 	echo "	  foo ();" >x &&
 	git diff --check &&
 	rm -f .gitattributes
 '

 test_expect_success 'line numbers in --check output are correct' '
 	echo "" >x &&
 	echo "foo(); " >>x &&
 	git diff --check | grep "x:2:"
 '

 test_expect_success 'checkdiff detects new trailing blank lines (1)' '
 	echo "foo();" >x &&
 	echo "" >>x &&
 	git diff --check | grep "new blank line"
 '

 test_expect_success 'checkdiff detects new trailing blank lines (2)' '
 	{ echo a; echo b; echo; echo; } >x &&
 	git add x &&
 	{ echo a; echo; echo; echo; echo; } >x &&
 	git diff --check | grep "new blank line"
 '

 test_expect_success 'checkdiff allows new blank lines' '
 	git checkout x &&
 	mv x y &&
 	(
 		echo "/* This is new */" &&
 		echo "" &&
 		cat y
 	) >x &&
 	git diff --check
 '

 cat <<EOF >expect
 EOF
 test_expect_success 'whitespace-only changes not reported' '
 	git reset --hard &&
 	echo >x "hello world" &&
 	git add x &&
 	git commit -m "hello 1" &&
 	echo >x "hello  world" &&
 	git diff -b >actual &&
 	test_cmp expect actual
 '

 cat <<EOF >expect
 diff --git a/x b/z
 similarity index NUM%
 rename from x
 rename to z
 index 380c32a..a97b785 100644
 EOF
 test_expect_success 'whitespace-only changes reported across renames' '
 	git reset --hard &&
 	for i in 1 2 3 4 5 6 7 8 9; do echo "$i$i$i$i$i$i"; done >x &&
 	git add x &&
 	git commit -m "base" &&
 	sed -e "5s/^/ /" x >z &&
 	git rm x &&
 	git add z &&
 	git diff -w -M --cached |
 	sed -e "/^similarity index /s/[0-9][0-9]*/NUM/" >actual &&
 	test_cmp expect actual
 '

 cat >expected <<\EOF
 diff --git a/empty b/void
 similarity index 100%
 rename from empty
 rename to void
 EOF

 test_expect_success 'rename empty' '
 	git reset --hard &&
 	>empty &&
 	git add empty &&
 	git commit -m empty &&
 	git mv empty void &&
 	git diff -w --cached -M >current &&
 	test_cmp expected current
 '

 test_expect_success 'combined diff with autocrlf conversion' '

 	git reset --hard &&
 	echo >x hello &&
 	git commit -m "one side" x &&
 	git checkout HEAD^ &&
 	echo >x goodbye &&
 	git commit -m "the other side" x &&
 	git config core.autocrlf true &&
 	test_must_fail git merge master &&

 	git diff | sed -e "1,/^@@@/d" >actual &&
 	! grep "^-" actual

 '

 # Start testing the colored format for whitespace checks

 test_expect_success 'setup diff colors' '
 	git config color.diff always &&
 	git config color.diff.plain normal &&
 	git config color.diff.meta bold &&
 	git config color.diff.frag cyan &&
 	git config color.diff.func normal &&
 	git config color.diff.old red &&
 	git config color.diff.new green &&
 	git config color.diff.commit yellow &&
 	git config color.diff.whitespace blue &&

 	git config core.autocrlf false
 '

 test_expect_success 'diff that introduces a line with only tabs' '
 	git config core.whitespace blank-at-eol &&
 	git reset --hard &&
 	echo "test" >x &&
 	git commit -m "initial" x &&
 	echo "{NTN}" | tr "NT" "\n\t" >>x &&
 	git -c color.diff=always diff | test_decode_color >current &&

 	cat >expected <<-\EOF &&
 	<BOLD>diff --git a/x b/x<RESET>
 	<BOLD>index 9daeafb..2874b91 100644<RESET>
 	<BOLD>--- a/x<RESET>
 	<BOLD>+++ b/x<RESET>
 	<CYAN>@@ -1 +1,4 @@<RESET>
 	 test<RESET>
 	<GREEN>+<RESET><GREEN>{<RESET>
 	<GREEN>+<RESET><BLUE>	<RESET>
 	<GREEN>+<RESET><GREEN>}<RESET>
 	EOF

 	test_cmp expected current
 '

 test_expect_success 'diff that introduces and removes ws breakages' '
 	git reset --hard &&
 	{
 		echo "0. blank-at-eol " &&
 		echo "1. blank-at-eol "
 	} >x &&
 	git commit -a --allow-empty -m preimage &&
 	{
 		echo "0. blank-at-eol " &&
 		echo "1. still-blank-at-eol " &&
 		echo "2. and a new line "
 	} >x &&

 	git -c color.diff=always diff |
 	test_decode_color >current &&

 	cat >expected <<-\EOF &&
 	<BOLD>diff --git a/x b/x<RESET>
 	<BOLD>index d0233a2..700886e 100644<RESET>
 	<BOLD>--- a/x<RESET>
 	<BOLD>+++ b/x<RESET>
 	<CYAN>@@ -1,2 +1,3 @@<RESET>
 	 0. blank-at-eol <RESET>
 	<RED>-1. blank-at-eol <RESET>
 	<GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
 	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
 	EOF

 	test_cmp expected current
 '

 test_expect_success 'ws-error-highlight test setup' '

 	git reset --hard &&
 	{
 		echo "0. blank-at-eol " &&
 		echo "1. blank-at-eol "
 	} >x &&
 	git commit -a --allow-empty -m preimage &&
 	{
 		echo "0. blank-at-eol " &&
 		echo "1. still-blank-at-eol " &&
 		echo "2. and a new line "
 	} >x &&

 	cat >expect.default-old <<-\EOF &&
 	<BOLD>diff --git a/x b/x<RESET>
 	<BOLD>index d0233a2..700886e 100644<RESET>
 	<BOLD>--- a/x<RESET>
 	<BOLD>+++ b/x<RESET>
 	<CYAN>@@ -1,2 +1,3 @@<RESET>
 	 0. blank-at-eol <RESET>
 	<RED>-<RESET><RED>1. blank-at-eol<RESET><BLUE> <RESET>
 	<GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
 	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
 	EOF

 	cat >expect.all <<-\EOF &&
 	<BOLD>diff --git a/x b/x<RESET>
 	<BOLD>index d0233a2..700886e 100644<RESET>
 	<BOLD>--- a/x<RESET>
 	<BOLD>+++ b/x<RESET>
 	<CYAN>@@ -1,2 +1,3 @@<RESET>
 	 <RESET>0. blank-at-eol<RESET><BLUE> <RESET>
 	<RED>-<RESET><RED>1. blank-at-eol<RESET><BLUE> <RESET>
 	<GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
 	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
 	EOF

 	cat >expect.none <<-\EOF
 	<BOLD>diff --git a/x b/x<RESET>
 	<BOLD>index d0233a2..700886e 100644<RESET>
 	<BOLD>--- a/x<RESET>
 	<BOLD>+++ b/x<RESET>
 	<CYAN>@@ -1,2 +1,3 @@<RESET>
 	 0. blank-at-eol <RESET>
 	<RED>-1. blank-at-eol <RESET>
 	<GREEN>+1. still-blank-at-eol <RESET>
 	<GREEN>+2. and a new line <RESET>
 	EOF

 '

 test_expect_success 'test --ws-error-highlight option' '

 	git -c color.diff=always diff --ws-error-highlight=default,old |
 	test_decode_color >current &&
 	test_cmp expect.default-old current &&

 	git -c color.diff=always diff --ws-error-highlight=all |
 	test_decode_color >current &&
 	test_cmp expect.all current &&

 	git -c color.diff=always diff --ws-error-highlight=none |
 	test_decode_color >current &&
 	test_cmp expect.none current

 '

 test_expect_success 'test diff.wsErrorHighlight config' '

 	git -c color.diff=always -c diff.wsErrorHighlight=default,old diff |
 	test_decode_color >current &&
 	test_cmp expect.default-old current &&

 	git -c color.diff=always -c diff.wsErrorHighlight=all diff |
 	test_decode_color >current &&
 	test_cmp expect.all current &&

 	git -c color.diff=always -c diff.wsErrorHighlight=none diff |
 	test_decode_color >current &&
 	test_cmp expect.none current

 '

 test_expect_success 'option overrides diff.wsErrorHighlight' '

 	git -c color.diff=always -c diff.wsErrorHighlight=none \
 		diff --ws-error-highlight=default,old |
 	test_decode_color >current &&
 	test_cmp expect.default-old current &&

 	git -c color.diff=always -c diff.wsErrorHighlight=default \
 		diff --ws-error-highlight=all |
 	test_decode_color >current &&
 	test_cmp expect.all current &&

 	git -c color.diff=always -c diff.wsErrorHighlight=all \
 		diff --ws-error-highlight=none |
 	test_decode_color >current &&
 	test_cmp expect.none current

 '

 test_done
	#!/bin/sh
	#
	# Copyright (c) 2006 Johannes E. Schindelin
	#

	test_description='Test special whitespace in diff engine.

	'
	. ./test-lib.sh
	. "$TEST_DIRECTORY"/diff-lib.sh

	test_expect_success "Ray Lehtiniemi's example" '
	cat <<-\EOF >x &&
	do {
	nothing;
	} while (0);
	EOF
	git update-index --add x &&

	cat <<-\EOF >x &&
	do
	{
	nothing;
	}
	while (0);
	EOF

	cat <<-\EOF >expect &&
	diff --git a/x b/x
	index adf3937..6edc172 100644
	--- a/x
	+++ b/x
	@@ -1,3 +1,5 @@
	-do {
	+do
	+{
	nothing;
	-} while (0);
	+}
	+while (0);
	EOF

	git diff >out &&
	test_cmp expect out &&

	git diff -w >out &&
	test_cmp expect out &&

	git diff -b >out &&
	test_cmp expect out
	'

	test_expect_success 'another test, without options' '
	tr Q "\015" <<-\EOF >x &&
	whitespace at beginning
	whitespace change
	whitespace in the middle
	whitespace at end
	unchanged line
	CR at endQ
	EOF

	git update-index x &&

	tr "_" " " <<-\EOF >x &&
	_ whitespace at beginning
	whitespace change
	white space in the middle
	whitespace at end__
	unchanged line
	CR at end
	EOF

	tr "Q_" "\015 " <<-\EOF >expect &&
	diff --git a/x b/x
	index d99af23..22d9f73 100644
	--- a/x
	+++ b/x
	@@ -1,6 +1,6 @@
	-whitespace at beginning
	-whitespace change
	-whitespace in the middle
	-whitespace at end
	+ whitespace at beginning
	+whitespace change
	+white space in the middle
	+whitespace at end__
	unchanged line
	-CR at endQ
	+CR at end
	EOF

	git diff >out &&
	test_cmp expect out &&

	>expect &&
	git diff -w >out &&
	test_cmp expect out &&

	git diff -w -b >out &&
	test_cmp expect out &&

	git diff -w --ignore-space-at-eol >out &&
	test_cmp expect out &&

	git diff -w -b --ignore-space-at-eol >out &&
	test_cmp expect out &&


	tr "Q_" "\015 " <<-\EOF >expect &&
	diff --git a/x b/x
	index d99af23..22d9f73 100644
	--- a/x
	+++ b/x
	@@ -1,6 +1,6 @@
	-whitespace at beginning
	+_ whitespace at beginning
	whitespace change
	-whitespace in the middle
	+white space in the middle
	whitespace at end__
	unchanged line
	CR at end
	EOF
	git diff -b >out &&
	test_cmp expect out &&

	git diff -b --ignore-space-at-eol >out &&
	test_cmp expect out &&

	tr "Q_" "\015 " <<-\EOF >expect &&
	diff --git a/x b/x
	index d99af23..22d9f73 100644
	--- a/x
	+++ b/x
	@@ -1,6 +1,6 @@
	-whitespace at beginning
	-whitespace change
	-whitespace in the middle
	+_ whitespace at beginning
	+whitespace change
	+white space in the middle
	whitespace at end__
	unchanged line
	CR at end
	EOF
	git diff --ignore-space-at-eol >out &&
	test_cmp expect out
	'

	test_expect_success 'ignore-blank-lines: only new lines' '
	test_seq 5 >x &&
	git update-index x &&
	test_seq 5 \| sed "/3/i\\
	" >x &&
	git diff --ignore-blank-lines >out &&
	>expect &&
	test_cmp out expect
	'

	test_expect_success 'ignore-blank-lines: only new lines with space' '
	test_seq 5 >x &&
	git update-index x &&
	test_seq 5 \| sed "/3/i\\
	" >x &&
	git diff -w --ignore-blank-lines >out &&
	>expect &&
	test_cmp out expect
	'

	test_expect_success 'ignore-blank-lines: after change' '
	cat <<-\EOF >x &&
	1
	2

	3
	4
	5

	6
	7
	EOF
	git update-index x &&
	cat <<-\EOF >x &&
	change

	1
	2
	3
	4
	5
	6

	7
	EOF
	git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp &&
	cat <<-\EOF >expected &&
	diff --git a/x b/x
	--- a/x
	+++ b/x
	@@ -1,6 +1,7 @@
	+change
	+
	1
	2
	-
	3
	4
	5
	EOF
	compare_diff_patch expected out.tmp
	'

	test_expect_success 'ignore-blank-lines: before change' '
	cat <<-\EOF >x &&
	1
	2

	3
	4
	5
	6
	7
	EOF
	git update-index x &&
	cat <<-\EOF >x &&

	1
	2
	3
	4
	5

	6
	7
	change
	EOF
	git diff --inter-hunk-context=100 --ignore-blank-lines >out.tmp &&
	cat <<-\EOF >expected &&
	diff --git a/x b/x
	--- a/x
	+++ b/x
	@@ -4,5 +4,7 @@
	3
	4
	5
	+
	6
	7
	+change
	EOF
	compare_diff_patch expected out.tmp
	'

	test_expect_success 'ignore-blank-lines: between changes' '
	cat <<-\EOF >x &&
	1
	2
	3
	4
	5


	6
	7
	8
	9
	10
	EOF
	git update-index x &&
	cat <<-\EOF >x &&
	change
	1
	2

	3
	4
	5
	6
	7
	8

	9
	10
	change
	EOF
	git diff --ignore-blank-lines >out.tmp &&
	cat <<-\EOF >expected &&
	diff --git a/x b/x
	--- a/x
	+++ b/x
	@@ -1,5 +1,7 @@
	+change
	1
	2
	+
	3
	4
	5
	@@ -8,5 +8,7 @@
	6
	7
	8
	+
	9
	10
	+change
	EOF
	compare_diff_patch expected out.tmp
	'

	test_expect_success 'ignore-blank-lines: between changes (with interhunkctx)' '
	test_seq 10 >x &&
	git update-index x &&
	cat <<-\EOF >x &&
	change
	1
	2

	3
	4
	5

	6
	7
	8
	9

	10
	change
	EOF
	git diff --inter-hunk-context=2 --ignore-blank-lines >out.tmp &&
	cat <<-\EOF >expected &&
	diff --git a/x b/x
	--- a/x
	+++ b/x
	@@ -1,10 +1,15 @@
	+change
	1
	2
	+
	3
	4
	5
	+
	6
	7
	8
	9
	+
	10
	+change
	EOF
	compare_diff_patch expected out.tmp
	'

	test_expect_success 'ignore-blank-lines: scattered spaces' '
	test_seq 10 >x &&
	git update-index x &&
	cat <<-\EOF >x &&
	change
	1
	2
	3

	4

	5

	6


	7

	8
	9
	10
	change
	EOF
	git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp &&
	cat <<-\EOF >expected &&
	diff --git a/x b/x
	--- a/x
	+++ b/x
	@@ -1,3 +1,4 @@
	+change
	1
	2
	3
	@@ -8,3 +15,4 @@
	8
	9
	10
	+change
	EOF
	compare_diff_patch expected out.tmp
	'

	test_expect_success 'ignore-blank-lines: spaces coalesce' '
	test_seq 6 >x &&
	git update-index x &&
	cat <<-\EOF >x &&
	change
	1
	2
	3

	4

	5

	6
	change
	EOF
	git diff --inter-hunk-context=4 --ignore-blank-lines >out.tmp &&
	cat <<-\EOF >expected &&
	diff --git a/x b/x
	--- a/x
	+++ b/x
	@@ -1,6 +1,11 @@
	+change
	1
	2
	3
	+
	4
	+
	5
	+
	6
	+change
	EOF
	compare_diff_patch expected out.tmp
	'

	test_expect_success 'ignore-blank-lines: mix changes and blank lines' '
	test_seq 16 >x &&
	git update-index x &&
	cat <<-\EOF >x &&
	change
	1
	2

	3
	4
	5
	change
	6
	7
	8

	9
	10
	11
	change
	12
	13
	14

	15
	16
	change
	EOF
	git diff --ignore-blank-lines >out.tmp &&
	cat <<-\EOF >expected &&
	diff --git a/x b/x
	--- a/x
	+++ b/x
	@@ -1,8 +1,11 @@
	+change
	1
	2
	+
	3
	4
	5
	+change
	6
	7
	8
	@@ -9,8 +13,11 @@
	9
	10
	11
	+change
	12
	13
	14
	+
	15
	16
	+change
	EOF
	compare_diff_patch expected out.tmp
	'

	test_expect_success 'check mixed spaces and tabs in indent' '
	# This is indented with SP HT SP.
	echo " foo();" >x &&
	git diff --check \| grep "space before tab in indent"
	'

	test_expect_success 'check mixed tabs and spaces in indent' '
	# This is indented with HT SP HT.
	echo " foo();" >x &&
	git diff --check \| grep "space before tab in indent"
	'

	test_expect_success 'check with no whitespace errors' '
	git commit -m "snapshot" &&
	echo "foo();" >x &&
	git diff --check
	'

	test_expect_success 'check with trailing whitespace' '
	echo "foo(); " >x &&
	test_must_fail git diff --check
	'

	test_expect_success 'check with space before tab in indent' '
	# indent has space followed by hard tab
	echo " foo();" >x &&
	test_must_fail git diff --check
	'

	test_expect_success '--check and --exit-code are not exclusive' '
	git checkout x &&
	git diff --check --exit-code
	'

	test_expect_success '--check and --quiet are not exclusive' '
	git diff --check --quiet
	'

	test_expect_success 'check staged with no whitespace errors' '
	echo "foo();" >x &&
	git add x &&
	git diff --cached --check
	'

	test_expect_success 'check staged with trailing whitespace' '
	echo "foo(); " >x &&
	git add x &&
	test_must_fail git diff --cached --check
	'

	test_expect_success 'check staged with space before tab in indent' '
	# indent has space followed by hard tab
	echo " foo();" >x &&
	git add x &&
	test_must_fail git diff --cached --check
	'

	test_expect_success 'check with no whitespace errors (diff-index)' '
	echo "foo();" >x &&
	git add x &&
	git diff-index --check HEAD
	'

	test_expect_success 'check with trailing whitespace (diff-index)' '
	echo "foo(); " >x &&
	git add x &&
	test_must_fail git diff-index --check HEAD
	'

	test_expect_success 'check with space before tab in indent (diff-index)' '
	# indent has space followed by hard tab
	echo " foo();" >x &&
	git add x &&
	test_must_fail git diff-index --check HEAD
	'

	test_expect_success 'check staged with no whitespace errors (diff-index)' '
	echo "foo();" >x &&
	git add x &&
	git diff-index --cached --check HEAD
	'

	test_expect_success 'check staged with trailing whitespace (diff-index)' '
	echo "foo(); " >x &&
	git add x &&
	test_must_fail git diff-index --cached --check HEAD
	'

	test_expect_success 'check staged with space before tab in indent (diff-index)' '
	# indent has space followed by hard tab
	echo " foo();" >x &&
	git add x &&
	test_must_fail git diff-index --cached --check HEAD
	'

	test_expect_success 'check with no whitespace errors (diff-tree)' '
	echo "foo();" >x &&
	git commit -m "new commit" x &&
	git diff-tree --check HEAD^ HEAD
	'

	test_expect_success 'check with trailing whitespace (diff-tree)' '
	echo "foo(); " >x &&
	git commit -m "another commit" x &&
	test_must_fail git diff-tree --check HEAD^ HEAD
	'

	test_expect_success 'check with space before tab in indent (diff-tree)' '
	# indent has space followed by hard tab
	echo " foo();" >x &&
	git commit -m "yet another" x &&
	test_must_fail git diff-tree --check HEAD^ HEAD
	'

	test_expect_success 'check trailing whitespace (trailing-space: off)' '
	git config core.whitespace "-trailing-space" &&
	echo "foo (); " >x &&
	git diff --check
	'

	test_expect_success 'check trailing whitespace (trailing-space: on)' '
	git config core.whitespace "trailing-space" &&
	echo "foo (); " >x &&
	test_must_fail git diff --check
	'

	test_expect_success 'check space before tab in indent (space-before-tab: off)' '
	# indent contains space followed by HT
	git config core.whitespace "-space-before-tab" &&
	echo " foo ();" >x &&
	git diff --check
	'

	test_expect_success 'check space before tab in indent (space-before-tab: on)' '
	# indent contains space followed by HT
	git config core.whitespace "space-before-tab" &&
	echo " foo (); " >x &&
	test_must_fail git diff --check
	'

	test_expect_success 'check spaces as indentation (indent-with-non-tab: off)' '
	git config core.whitespace "-indent-with-non-tab" &&
	echo " foo ();" >x &&
	git diff --check
	'

	test_expect_success 'check spaces as indentation (indent-with-non-tab: on)' '
	git config core.whitespace "indent-with-non-tab" &&
	echo " foo ();" >x &&
	test_must_fail git diff --check
	'

	test_expect_success 'ditto, but tabwidth=9' '
	git config core.whitespace "indent-with-non-tab,tabwidth=9" &&
	git diff --check
	'

	test_expect_success 'check tabs and spaces as indentation (indent-with-non-tab: on)' '
	git config core.whitespace "indent-with-non-tab" &&
	echo " foo ();" >x &&
	test_must_fail git diff --check
	'

	test_expect_success 'ditto, but tabwidth=10' '
	git config core.whitespace "indent-with-non-tab,tabwidth=10" &&
	test_must_fail git diff --check
	'

	test_expect_success 'ditto, but tabwidth=20' '
	git config core.whitespace "indent-with-non-tab,tabwidth=20" &&
	git diff --check
	'

	test_expect_success 'check tabs as indentation (tab-in-indent: off)' '
	git config core.whitespace "-tab-in-indent" &&
	echo " foo ();" >x &&
	git diff --check
	'

	test_expect_success 'check tabs as indentation (tab-in-indent: on)' '
	git config core.whitespace "tab-in-indent" &&
	echo " foo ();" >x &&
	test_must_fail git diff --check
	'

	test_expect_success 'check tabs and spaces as indentation (tab-in-indent: on)' '
	git config core.whitespace "tab-in-indent" &&
	echo " foo ();" >x &&
	test_must_fail git diff --check
	'

	test_expect_success 'ditto, but tabwidth=1 (must be irrelevant)' '
	git config core.whitespace "tab-in-indent,tabwidth=1" &&
	test_must_fail git diff --check
	'

	test_expect_success 'check tab-in-indent and indent-with-non-tab conflict' '
	git config core.whitespace "tab-in-indent,indent-with-non-tab" &&
	echo "foo ();" >x &&
	test_must_fail git diff --check
	'

	test_expect_success 'check tab-in-indent excluded from wildcard whitespace attribute' '
	git config --unset core.whitespace &&
	echo "x whitespace" >.gitattributes &&
	echo " foo ();" >x &&
	git diff --check &&
	rm -f .gitattributes
	'

	test_expect_success 'line numbers in --check output are correct' '
	echo "" >x &&
	echo "foo(); " >>x &&
	git diff --check \| grep "x:2:"
	'

	test_expect_success 'checkdiff detects new trailing blank lines (1)' '
	echo "foo();" >x &&
	echo "" >>x &&
	git diff --check \| grep "new blank line"
	'

	test_expect_success 'checkdiff detects new trailing blank lines (2)' '
	{ echo a; echo b; echo; echo; } >x &&
	git add x &&
	{ echo a; echo; echo; echo; echo; } >x &&
	git diff --check \| grep "new blank line"
	'

	test_expect_success 'checkdiff allows new blank lines' '
	git checkout x &&
	mv x y &&
	(
	echo "/* This is new */" &&
	echo "" &&
	cat y
	) >x &&
	git diff --check
	'

	cat <<EOF >expect
	EOF
	test_expect_success 'whitespace-only changes not reported' '
	git reset --hard &&
	echo >x "hello world" &&
	git add x &&
	git commit -m "hello 1" &&
	echo >x "hello world" &&
	git diff -b >actual &&
	test_cmp expect actual
	'

	cat <<EOF >expect
	diff --git a/x b/z
	similarity index NUM%
	rename from x
	rename to z
	index 380c32a..a97b785 100644
	EOF
	test_expect_success 'whitespace-only changes reported across renames' '
	git reset --hard &&
	for i in 1 2 3 4 5 6 7 8 9; do echo "$i$i$i$i$i$i"; done >x &&
	git add x &&
	git commit -m "base" &&
	sed -e "5s/^/ /" x >z &&
	git rm x &&
	git add z &&
	git diff -w -M --cached \|
	sed -e "/^similarity index /s/[0-9][0-9]*/NUM/" >actual &&
	test_cmp expect actual
	'

	cat >expected <<\EOF
	diff --git a/empty b/void
	similarity index 100%
	rename from empty
	rename to void
	EOF

	test_expect_success 'rename empty' '
	git reset --hard &&
	>empty &&
	git add empty &&
	git commit -m empty &&
	git mv empty void &&
	git diff -w --cached -M >current &&
	test_cmp expected current
	'

	test_expect_success 'combined diff with autocrlf conversion' '

	git reset --hard &&
	echo >x hello &&
	git commit -m "one side" x &&
	git checkout HEAD^ &&
	echo >x goodbye &&
	git commit -m "the other side" x &&
	git config core.autocrlf true &&
	test_must_fail git merge master &&

	git diff \| sed -e "1,/^@@@/d" >actual &&
	! grep "^-" actual

	'

	# Start testing the colored format for whitespace checks

	test_expect_success 'setup diff colors' '
	git config color.diff always &&
	git config color.diff.plain normal &&
	git config color.diff.meta bold &&
	git config color.diff.frag cyan &&
	git config color.diff.func normal &&
	git config color.diff.old red &&
	git config color.diff.new green &&
	git config color.diff.commit yellow &&
	git config color.diff.whitespace blue &&

	git config core.autocrlf false
	'

	test_expect_success 'diff that introduces a line with only tabs' '
	git config core.whitespace blank-at-eol &&
	git reset --hard &&
	echo "test" >x &&
	git commit -m "initial" x &&
	echo "{NTN}" \| tr "NT" "\n\t" >>x &&
	git -c color.diff=always diff \| test_decode_color >current &&

	cat >expected <<-\EOF &&
	<BOLD>diff --git a/x b/x<RESET>
	<BOLD>index 9daeafb..2874b91 100644<RESET>
	<BOLD>--- a/x<RESET>
	<BOLD>+++ b/x<RESET>
	<CYAN>@@ -1 +1,4 @@<RESET>
	test<RESET>
	<GREEN>+<RESET><GREEN>{<RESET>
	<GREEN>+<RESET><BLUE> <RESET>
	<GREEN>+<RESET><GREEN>}<RESET>
	EOF

	test_cmp expected current
	'

	test_expect_success 'diff that introduces and removes ws breakages' '
	git reset --hard &&
	{
	echo "0. blank-at-eol " &&
	echo "1. blank-at-eol "
	} >x &&
	git commit -a --allow-empty -m preimage &&
	{
	echo "0. blank-at-eol " &&
	echo "1. still-blank-at-eol " &&
	echo "2. and a new line "
	} >x &&

	git -c color.diff=always diff \|
	test_decode_color >current &&

	cat >expected <<-\EOF &&
	<BOLD>diff --git a/x b/x<RESET>
	<BOLD>index d0233a2..700886e 100644<RESET>
	<BOLD>--- a/x<RESET>
	<BOLD>+++ b/x<RESET>
	<CYAN>@@ -1,2 +1,3 @@<RESET>
	0. blank-at-eol <RESET>
	<RED>-1. blank-at-eol <RESET>
	<GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
	EOF

	test_cmp expected current
	'

	test_expect_success 'ws-error-highlight test setup' '

	git reset --hard &&
	{
	echo "0. blank-at-eol " &&
	echo "1. blank-at-eol "
	} >x &&
	git commit -a --allow-empty -m preimage &&
	{
	echo "0. blank-at-eol " &&
	echo "1. still-blank-at-eol " &&
	echo "2. and a new line "
	} >x &&

	cat >expect.default-old <<-\EOF &&
	<BOLD>diff --git a/x b/x<RESET>
	<BOLD>index d0233a2..700886e 100644<RESET>
	<BOLD>--- a/x<RESET>
	<BOLD>+++ b/x<RESET>
	<CYAN>@@ -1,2 +1,3 @@<RESET>
	0. blank-at-eol <RESET>
	<RED>-<RESET><RED>1. blank-at-eol<RESET><BLUE> <RESET>
	<GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
	EOF

	cat >expect.all <<-\EOF &&
	<BOLD>diff --git a/x b/x<RESET>
	<BOLD>index d0233a2..700886e 100644<RESET>
	<BOLD>--- a/x<RESET>
	<BOLD>+++ b/x<RESET>
	<CYAN>@@ -1,2 +1,3 @@<RESET>
	<RESET>0. blank-at-eol<RESET><BLUE> <RESET>
	<RED>-<RESET><RED>1. blank-at-eol<RESET><BLUE> <RESET>
	<GREEN>+<RESET><GREEN>1. still-blank-at-eol<RESET><BLUE> <RESET>
	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
	EOF

	cat >expect.none <<-\EOF
	<BOLD>diff --git a/x b/x<RESET>
	<BOLD>index d0233a2..700886e 100644<RESET>
	<BOLD>--- a/x<RESET>
	<BOLD>+++ b/x<RESET>
	<CYAN>@@ -1,2 +1,3 @@<RESET>
	0. blank-at-eol <RESET>
	<RED>-1. blank-at-eol <RESET>
	<GREEN>+1. still-blank-at-eol <RESET>
	<GREEN>+2. and a new line <RESET>
	EOF

	'

	test_expect_success 'test --ws-error-highlight option' '

	git -c color.diff=always diff --ws-error-highlight=default,old \|
	test_decode_color >current &&
	test_cmp expect.default-old current &&

	git -c color.diff=always diff --ws-error-highlight=all \|
	test_decode_color >current &&
	test_cmp expect.all current &&

	git -c color.diff=always diff --ws-error-highlight=none \|
	test_decode_color >current &&
	test_cmp expect.none current

	'

	test_expect_success 'test diff.wsErrorHighlight config' '

	git -c color.diff=always -c diff.wsErrorHighlight=default,old diff \|
	test_decode_color >current &&
	test_cmp expect.default-old current &&

	git -c color.diff=always -c diff.wsErrorHighlight=all diff \|
	test_decode_color >current &&
	test_cmp expect.all current &&

	git -c color.diff=always -c diff.wsErrorHighlight=none diff \|
	test_decode_color >current &&
	test_cmp expect.none current

	'

	test_expect_success 'option overrides diff.wsErrorHighlight' '

	git -c color.diff=always -c diff.wsErrorHighlight=none \
	diff --ws-error-highlight=default,old \|
	test_decode_color >current &&
	test_cmp expect.default-old current &&

	git -c color.diff=always -c diff.wsErrorHighlight=default \
	diff --ws-error-highlight=all \|
	test_decode_color >current &&
	test_cmp expect.all current &&

	git -c color.diff=always -c diff.wsErrorHighlight=all \
	diff --ws-error-highlight=none \|
	test_decode_color >current &&
	test_cmp expect.none current

	'

	test_done