Tests: added rewrite "break" directive test for valid location.

rewrite.t

diff --git a/rewrite.t b/rewrite.t
index a8b7848..1bae290 100644
--- a/rewrite.t
+++ b/rewrite.t
@@ -21,7 +21,7 @@
 select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
-my $t = Test::Nginx->new()->has(qw/http rewrite/)->plan(22)
+my $t = Test::Nginx->new()->has(qw/http rewrite proxy/)->plan(23)
 	->write_file_expand('nginx.conf', <<'EOF');
 
 %%TEST_GLOBALS%%
@@ -130,6 +130,12 @@
             rewrite ^(.*) $1?c=$1;
             return 200 "uri:$uri args:$args";
         }
+
+        location /break {
+            rewrite ^ /return200;
+            break;
+            proxy_pass http://127.0.0.1:8080/return204;
+        }
     }
 }
 
@@ -231,4 +237,13 @@
 	qr!^uri:/capturedup/% args:c=/capturedup/%25&a=b$!ms,
 	'escape with added args');
 
+# break
+
+TODO: {
+local $TODO = 'not yet' unless $t->has_version('1.17.8');
+
+like(http_get('/break'), qr/200/, 'valid_location reset');
+
+}
+
 ###############################################################################