Make the oauth2 lib handle OAuth2 401 errors.

pkg/oauth2/test/utils_test.dart

+// 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.
+
+library utils_test;
+
+import '../../unittest/lib/unittest.dart';
+import '../lib/src/utils.dart';
+
+
+// A matcher that matches a Pair.
+Matcher pairOf(Matcher firstMatcher, Matcher lastMatcher) =>
+   new _PairMatcher(firstMatcher, lastMatcher);
+
+class _PairMatcher extends BaseMatcher {
+  final Matcher _firstMatcher;
+  final Matcher _lastMatcher;
+
+  _PairMatcher(this._firstMatcher, this._lastMatcher);
+
+  bool matches(item, MatchState matchState) {
+    if (item is! Pair) return false;
+    return _firstMatcher.matches(item.first, matchState) &&
+        _lastMatcher.matches(item.last, matchState);
+  }
+
+  Description describe(Description description) {
+    description.addAll("(", ", ", ")", [_firstMatcher, _lastMatcher]);
+  }
+}
+
+
+void main() {
+  group('parseAuthenticateHeader', () {
+    test("parses a scheme", () {
+      expect(parseAuthenticateHeader('bearer'),
+          pairOf(equals('bearer'), equals({})));
+    });
+
+    test("lower-cases the scheme", () {
+      expect(parseAuthenticateHeader('BeaRer'),
+          pairOf(equals('bearer'), equals({})));
+    });
+
+    test("parses a scheme with trailing whitespace", () {
+      expect(parseAuthenticateHeader('bearer   '),
+          pairOf(equals('bearer'), equals({})));
+    });
+
+    test("parses a scheme with one param", () {
+      expect(parseAuthenticateHeader('bearer  foo="bar"'),
+          pairOf(equals('bearer'), equals({'foo': 'bar'})));
+    });
+
+    test("parses a scheme with several params", () {
+      var header = 'bearer foo="bar", bar="baz"  ,baz="qux"';
+      expect(parseAuthenticateHeader(header),
+          pairOf(equals('bearer'), equals({
+            'foo': 'bar',
+            'bar': 'baz',
+            'baz': 'qux'
+          })));
+    });
+
+    test("lower-cases parameter names but not values", () {
+      expect(parseAuthenticateHeader('bearer FoO="bAr"'),
+          pairOf(equals('bearer'), equals({'foo': 'bAr'})));
+    });
+
+    test("allows empty values", () {
+      expect(parseAuthenticateHeader('bearer foo=""'),
+          pairOf(equals('bearer'), equals({'foo': ''})));
+    });
+
+    test("won't parse an empty string", () {
+      expect(() => parseAuthenticateHeader(''),
+          throwsFormatException);
+    });
+
+    test("won't parse a token without a value", () {
+      expect(() => parseAuthenticateHeader('bearer foo'),
+          throwsFormatException);
+
+      expect(() => parseAuthenticateHeader('bearer foo='),
+          throwsFormatException);
+    });
+
+    test("won't parse a token without a value", () {
+      expect(() => parseAuthenticateHeader('bearer foo'),
+          throwsFormatException);
+
+      expect(() => parseAuthenticateHeader('bearer foo='),
+          throwsFormatException);
+    });
+
+    test("won't parse a trailing comma", () {
+      expect(() => parseAuthenticateHeader('bearer foo="bar",'),
+          throwsFormatException);
+    });
+
+    test("won't parse a multiple params without a comma", () {
+      expect(() => parseAuthenticateHeader('bearer foo="bar" bar="baz"'),
+          throwsFormatException);
+    });
+  });
+}