Tests: xslt_stylesheet parameter from variable.

xslt.t

diff --git a/xslt.t b/xslt.t
index c50c3f2..1516e97 100644
--- a/xslt.t
+++ b/xslt.t
@@ -21,7 +21,7 @@
 select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
-my $t = Test::Nginx->new()->has(qw/http xslt/)->plan(5);
+my $t = Test::Nginx->new()->has(qw/http xslt/)->plan(6);
 
 $t->write_file_expand('nginx.conf', <<'EOF');
 
@@ -56,6 +56,10 @@
             xslt_stylesheet %%TESTDIR%%/first.xslt;
             xslt_stylesheet %%TESTDIR%%/test.xslt;
         }
+        location /x5 {
+            xslt_stylesheet %%TESTDIR%%/test.xslt
+                            param1='$server_name';
+        }
     }
 }
 
@@ -102,6 +106,7 @@
 $t->write_file('x2', '<root>data</root>');
 $t->write_file('x3', '<!DOCTYPE root><root>&test;</root>');
 $t->write_file('x4', '<root>data</root>');
+$t->write_file('x5', '<root>data</root>');
 
 $t->run();
 
@@ -114,4 +119,12 @@
 like(http_get("/x3"), qr!200 OK.*data=test entity!ms, 'entities');
 like(http_get("/x4"), qr!200 OK.*data=other data!ms, 'several stylesheets');
 
+TODO: {
+todo_skip 'heap-buffer-overflow', 1 unless $t->has_version('1.17.2')
+	or $ENV{TEST_NGINX_UNSAFE};
+
+like(http_get("/x5"), qr!200 OK.*param1=localhost!ms, 'params variable');
+
+}
+
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