1 files changed, 145 insertions, 15 deletions

diff --git a/t/t4018-diff-funcname.sh b/t/t4018-diff-funcname.sh
index 6d3ef6c60b..4bd2a1c838 100755
--- a/t/t4018-diff-funcname.sh
+++ b/t/t4018-diff-funcname.sh
@@ -9,8 +9,7 @@ test_description='Test custom diff function name patterns'
 
 LF='
 '
-
-cat > Beer.java << EOF
+cat >Beer.java <<\EOF
 public class Beer
 {
 	int special;
@@ -29,32 +28,163 @@ public class Beer
 	}
 }
 EOF
+sed 's/beer\\/beer,\\/' <Beer.java >Beer-correct.java
+cat >Beer.perl <<\EOT
+package Beer;
+
+use strict;
+use warnings;
+use parent qw(Exporter);
+our @EXPORT_OK = qw(round finalround);
+
+sub other; # forward declaration
+
+# hello
+
+sub round {
+	my ($n) = @_;
+	print "$n bottles of beer on the wall ";
+	print "$n bottles of beer\n";
+	print "Take one down, pass it around, ";
+	$n = $n - 1;
+	print "$n bottles of beer on the wall.\n";
+}
+
+sub finalround
+{
+	print "Go to the store, buy some more\n";
+	print "99 bottles of beer on the wall.\n");
+}
+
+sub withheredocument {
+	print <<"EOF"
+decoy here-doc
+EOF
+	# some lines of context
+	# to pad it out
+	print "hello\n";
+}
 
-sed 's/beer\\/beer,\\/' < Beer.java > Beer-correct.java
+__END__
+
+=head1 NAME
+
+Beer - subroutine to output fragment of a drinking song
+
+=head1 SYNOPSIS
+
+	use Beer qw(round finalround);
+
+	sub song {
+		for (my $i = 99; $i > 0; $i--) {
+			round $i;
+		}
+		finalround;
+	}
+
+	song;
+
+=cut
+EOT
+sed -e '
+	s/hello/goodbye/
+	s/beer\\/beer,\\/
+	s/more\\/more,\\/
+	s/song;/song();/
+' <Beer.perl >Beer-correct.perl
+
+test_config () {
+	git config "$1" "$2" &&
+	test_when_finished "git config --unset $1"
+}
+
+test_expect_funcname () {
+	lang=${2-java}
+	test_expect_code 1 git diff --no-index -U1 \
+		"Beer.$lang" "Beer-correct.$lang" >diff &&
+	grep "^@@.*@@ $1" diff
+}
+
+for p in bibtex cpp csharp fortran html java matlab objc pascal perl php python ruby tex
+do
+	test_expect_success "builtin $p pattern compiles" '
+		echo "*.java diff=$p" >.gitattributes &&
+		test_expect_code 1 git diff --no-index \
+			Beer.java Beer-correct.java 2>msg &&
+		! grep fatal msg &&
+		! grep error msg
+	'
+	test_expect_success "builtin $p wordRegex pattern compiles" '
+		echo "*.java diff=$p" >.gitattributes &&
+		test_expect_code 1 git diff --no-index --word-diff \
+			Beer.java Beer-correct.java 2>msg &&
+		! grep fatal msg &&
+		! grep error msg
+	'
+done
 
 test_expect_success 'default behaviour' '
-	git diff --no-index Beer.java Beer-correct.java |
-	grep "^@@.*@@ public class Beer"
+	rm -f .gitattributes &&
+	test_expect_funcname "public class Beer\$"
+'
+
+test_expect_success 'set up .gitattributes declaring drivers to test' '
+	cat >.gitattributes <<-\EOF
+	*.java diff=java
+	*.perl diff=perl
+	EOF
 '
 
 test_expect_success 'preset java pattern' '
-	echo "*.java diff=java" >.gitattributes &&
-	git diff --no-index Beer.java Beer-correct.java |
-	grep "^@@.*@@ public static void main("
+	test_expect_funcname "public static void main("
 '
 
-git config diff.java.funcname '!static
-!String
-[^ 	].*s.*'
+test_expect_success 'preset perl pattern' '
+	test_expect_funcname "sub round {\$" perl
+'
+
+test_expect_success 'perl pattern accepts K&R style brace placement, too' '
+	test_expect_funcname "sub finalround\$" perl
+'
+
+test_expect_success 'but is not distracted by end of <<here document' '
+	test_expect_funcname "sub withheredocument {\$" perl
+'
+
+test_expect_success 'perl pattern is not distracted by sub within POD' '
+	test_expect_funcname "=head" perl
+'
+
+test_expect_success 'perl pattern gets full line of POD header' '
+	test_expect_funcname "=head1 SYNOPSIS\$" perl
+'
+
+test_expect_success 'perl pattern is not distracted by forward declaration' '
+	test_expect_funcname "package Beer;\$" perl
+'
 
 test_expect_success 'custom pattern' '
-	git diff --no-index Beer.java Beer-correct.java |
-	grep "^@@.*@@ int special;$"
+	test_config diff.java.funcname "!static
+!String
+[^ 	].*s.*" &&
+	test_expect_funcname "int special;\$"
 '
 
 test_expect_success 'last regexp must not be negated' '
-	git config diff.java.funcname "!static" &&
-	! git diff --no-index Beer.java Beer-correct.java
+	test_config diff.java.funcname "!static" &&
+	test_expect_code 128 git diff --no-index Beer.java Beer-correct.java 2>msg &&
+	grep ": Last expression must not be negated:" msg
+'
+
+test_expect_success 'pattern which matches to end of line' '
+	test_config diff.java.funcname "Beer\$" &&
+	test_expect_funcname "Beer\$"
+'
+
+test_expect_success 'alternation in pattern' '
+	test_config diff.java.funcname "Beer$" &&
+	test_config diff.java.xfuncname "^[ 	]*((public|static).*)$" &&
+	test_expect_funcname "public static void main("
 '
 
 test_done