t4034: diff.*.wordregex should not be "sticky" in --word-diff

The test case applies a custom wordRegex to one file in a diff, and expects
that the default word splitting applies to the second file in the diff.
But the custom wordRegex is also incorrectly used for the second file.

Helped-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t4034-diff-words.sh b/t/t4034-diff-words.sh
index 5c2012111c28d338ad979fb7bcca871e744184fe..310ace1b5d32658c0afb33f66d9aa78dd3e75c6e 100755 (executable)
--- a/t/t4034-diff-words.sh
+++ b/t/t4034-diff-words.sh
@@ -3,6 +3,7 @@
 test_description='word diff colors'
 
 . ./test-lib.sh
+. "$TEST_DIRECTORY"/diff-lib.sh
 
 cat >pre.simple <<-\EOF
        h(4)
@@ -293,6 +294,10 @@ test_expect_success '--word-diff=none' '
        word_diff --word-diff=plain --word-diff=none
 '
 
+test_expect_success 'unset default driver' '
+       test_unconfig diff.wordregex
+'
+
 test_language_driver bibtex
 test_language_driver cpp
 test_language_driver csharp
@@ -348,4 +353,35 @@ test_expect_success 'word-diff with no newline at EOF' '
        word_diff --word-diff=plain
 '
 
+test_expect_success 'setup history with two files' '
+       echo "a b; c" >a.tex &&
+       echo "a b; c" >z.txt &&
+       git add a.tex z.txt &&
+       git commit -minitial &&
+
+       # modify both
+       echo "a bx; c" >a.tex &&
+       echo "a bx; c" >z.txt &&
+       git commit -mmodified -a
+'
+
+test_expect_failure 'wordRegex for the first file does not apply to the second' '
+       echo "*.tex diff=tex" >.gitattributes &&
+       git config diff.tex.wordRegex "[a-z]+|." &&
+       cat >expect <<-\EOF &&
+               diff --git a/a.tex b/a.tex
+               --- a/a.tex
+               +++ b/a.tex
+               @@ -1 +1 @@
+               a [-b-]{+bx+}; c
+               diff --git a/z.txt b/z.txt
+               --- a/z.txt
+               +++ b/z.txt
+               @@ -1 +1 @@
+               a [-b;-]{+bx;+} c
+       EOF
+       git diff --word-diff HEAD~ >actual &&
+       compare_diff_patch expect actual
+'
+
 test_done