Add handling of HTTP header "Expires"

tests/standalone/src/io/HttpDateTest.dart

Index: tests/standalone/src/io/HttpDateTest.dart
diff --git a/tests/standalone/src/io/HttpDateTest.dart b/tests/standalone/src/io/HttpDateTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..0b02ca7fa27e981fe1fdbb90533d1970f4d1dd41
--- /dev/null
+++ b/tests/standalone/src/io/HttpDateTest.dart
@@ -0,0 +1,91 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#source("../../../../runtime/bin/http_utils.dart");
+
+class HttpException implements Exception {
+  const HttpException([String this.message = ""]);
+  String toString() => "HttpException: $message";
+  final String message;
+}
+
+void testParseHttpDate() {
+  TimeZone utc = new TimeZone.utc();
+  Date date;
+  date = new Date.withTimeZone(1999, Date.JUN, 11, 18, 46, 53, 0, utc);
+  Expect.equals(date, _HttpUtils.parseDate("Fri, 11 Jun 1999 18:46:53 GMT"));
+  Expect.equals(date, _HttpUtils.parseDate("Friday, 11-Jun-1999 18:46:53 GMT"));
+  Expect.equals(date, _HttpUtils.parseDate("Fri Jun 11 18:46:53 1999"));
+
+  date = new Date.withTimeZone(1970, Date.JAN, 1, 0, 0, 0, 0, utc);
+  Expect.equals(date, _HttpUtils.parseDate("Thu, 1 Jan 1970 00:00:00 GMT"));
+  Expect.equals(date,
+                _HttpUtils.parseDate("Thursday, 1-Jan-1970 00:00:00 GMT"));
+  Expect.equals(date, _HttpUtils.parseDate("Thu Jan  1 00:00:00 1970"));
+
+  date = new Date.withTimeZone(2012, Date.MAR, 5, 23, 59, 59, 0, utc);
+  Expect.equals(date, _HttpUtils.parseDate("Mon, 5 Mar 2012 23:59:59 GMT"));
+  Expect.equals(date, _HttpUtils.parseDate("Monday, 5-Mar-2012 23:59:59 GMT"));
+  Expect.equals(date, _HttpUtils.parseDate("Mon Mar  5 23:59:59 2012"));
+}
+
+void testFormatParseHttpDate() {
+  test(int year,
+       int month,
+       int day,
+       int hours,
+       int minutes,
+       int seconds,
+       String expectedFormatted) {
+    TimeZone utc = new TimeZone.utc();
+    Date date;
+    String formatted;
+    date = new Date.withTimeZone(
+        year, month, day, hours, minutes, seconds, 0, utc);
+    formatted = _HttpUtils.formatDate(date);
+    Expect.equals(expectedFormatted, formatted);
+    Expect.equals(date, _HttpUtils.parseDate(formatted));
+  }
+
+  test(1999, Date.JUN, 11, 18, 46, 53, "Fri, 11 Jun 1999 18:46:53 GMT");
+  test(1970, Date.JAN, 1, 0, 0, 0, "Thu, 1 Jan 1970 00:00:00 GMT");
+  test(2012, Date.MAR, 5, 23, 59, 59, "Mon, 5 Mar 2012 23:59:59 GMT");
+}
+
+void testParseHttpDateFailures() {
+  Expect.throws(() {
+    _HttpUtils.parseDate("");
+  });
+  String valid = "Mon, 5 Mar 2012 23:59:59 GMT";
+  for (int i = 1; i < valid.length - 1; i++) {
+    String tmp = valid.substring(0, i);
+    Expect.throws(() {
+      _HttpUtils.parseDate(tmp);
+    });
+    Expect.throws(() {
+      _HttpUtils.parseDate(" $tmp");
+    });
+    Expect.throws(() {
+      _HttpUtils.parseDate(" $tmp ");
+    });
+    Expect.throws(() {
+      _HttpUtils.parseDate("$tmp ");
+    });
+  }
+  Expect.throws(() {
+    _HttpUtils.parseDate(" $valid");
+  });
+  Expect.throws(() {
+    _HttpUtils.parseDate(" $valid ");
+  });
+  Expect.throws(() {
+    _HttpUtils.parseDate("$valid ");
+  });
+}
+
+void main() {
+  testParseHttpDate();
+  testFormatParseHttpDate();
+  testParseHttpDateFailures();
+}