[PATCH 1/4] t4015: split out the "setup" part of ws-error-highlight test

[Junio C Hamano <gitster@pobox.com>]

We'd want to run this same set of test twice, once with the option
and another time with an equivalent configuration setting.  Split
out the step that prepares the test data and expected output and
move the test for the command line option into a separate test.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t4015-diff-whitespace.sh | 39 +++++++++++++++++++++------------------
 1 file changed, 21 insertions(+), 18 deletions(-)

diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
index 2434157aa7..4a4f374824 100755
--- a/t/t4015-diff-whitespace.sh
+++ b/t/t4015-diff-whitespace.sh
@@ -869,7 +869,8 @@ test_expect_success 'diff that introduces and removes ws breakages' '
 	test_cmp expected current
 '
 
-test_expect_success 'the same with --ws-error-highlight' '
+test_expect_success 'ws-error-highlight test setup' '
+
 	git reset --hard &&
 	{
 		echo "0. blank-at-eol " &&
@@ -882,10 +883,7 @@ test_expect_success 'the same with --ws-error-highlight' '
 		echo "2. and a new line "
 	} >x &&
 
-	git -c color.diff=always diff --ws-error-highlight=default,old |
-	test_decode_color >current &&
-
-	cat >expected <<-\EOF &&
+	cat >expect.default-old <<-\EOF &&
 	<BOLD>diff --git a/x b/x<RESET>
 	<BOLD>index d0233a2..700886e 100644<RESET>
 	<BOLD>--- a/x<RESET>
@@ -897,12 +895,7 @@ test_expect_success 'the same with --ws-error-highlight' '
 	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
 	EOF
 
-	test_cmp expected current &&
-
-	git -c color.diff=always diff --ws-error-highlight=all |
-	test_decode_color >current &&
-
-	cat >expected <<-\EOF &&
+	cat >expect.all <<-\EOF &&
 	<BOLD>diff --git a/x b/x<RESET>
 	<BOLD>index d0233a2..700886e 100644<RESET>
 	<BOLD>--- a/x<RESET>
@@ -914,12 +907,7 @@ test_expect_success 'the same with --ws-error-highlight' '
 	<GREEN>+<RESET><GREEN>2. and a new line<RESET><BLUE> <RESET>
 	EOF
 
-	test_cmp expected current &&
-
-	git -c color.diff=always diff --ws-error-highlight=none |
-	test_decode_color >current &&
-
-	cat >expected <<-\EOF &&
+	cat >expect.none <<-\EOF
 	<BOLD>diff --git a/x b/x<RESET>
 	<BOLD>index d0233a2..700886e 100644<RESET>
 	<BOLD>--- a/x<RESET>
@@ -931,7 +919,22 @@ test_expect_success 'the same with --ws-error-highlight' '
 	<GREEN>+2. and a new line <RESET>
 	EOF
 
-	test_cmp expected current
+'
+
+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_done
-- 
2.10.1-510-g1ef781f2c1