added tests covering #119

+var server = require('webserver').create();
+var service = server.listen(8090, function (request, response) {
+    var code = parseInt(/^\/(\d+)$/.exec(request.url)[1], 10);
+    response.statusCode = code;
+    response.write("");
+    response.close();
+});
+
+codes = [100, 101, 102, 118, 200, 201, 202, 203, 204, 205, 206, 207, 210,
+         300, 301, 302, 303, 304, 305, 307, 310,
+         400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 410, 411, 412, 413,
+              414, 415, 416, 417, 418, 422, 423, 424, 425, 426, 449, 450,
+         500, 501, 502, 503, 504, 505, 507, 509];
+
+casper.start('http://google.com').each(codes, function(self, code) {
+    if (code === 100) {
+        // HTTP 100 is CONTINUE, so don't expect a terminated response
+        return;
+    }
+    this.thenOpen('http://localhost:8090/' + code, function() {
+        this.test.assertHttpStatus(code);
+    });
+});
+
+casper.run(function() {
+    server.close();
+    this.test.done();
+});