allow object to be passed in as a description

lib/test.dart

@@ -118,9 +118,13 @@ Declarer get _declarer {
 ///
 /// If multiple platforms match, the annotations apply in order as through
 /// they were in nested groups.
-void test(String description, body(), {String testOn, Timeout timeout, skip,
-        tags, Map<String, dynamic> onPlatform}) =>
-    _declarer.test(description, body,
+void test(description, body(),
+        {String testOn,
+        Timeout timeout,
+        skip,
+        tags,
+        Map<String, dynamic> onPlatform}) =>
+    _declarer.test(description.toString(), body,
         testOn: testOn,
         timeout: timeout,
         skip: skip,
@@ -171,10 +175,18 @@ void test(String description, body(), {String testOn, Timeout timeout, skip,
 ///
 /// If multiple platforms match, the annotations apply in order as through
 /// they were in nested groups.
-void group(String description, body(), {String testOn, Timeout timeout, skip,
-        tags, Map<String, dynamic> onPlatform}) =>
-    _declarer.group(description, body,
-        testOn: testOn, timeout: timeout, skip: skip, tags: tags);
+void group(description, body(),
+    {String testOn,
+    Timeout timeout,
+    skip,
+    tags,
+    Map<String, dynamic> onPlatform}) =>
+  description == null
+      ? _declarer.group(description, body,
+          testOn: testOn, timeout: timeout, skip: skip, tags: tags)
+      : _declarer.group(description.toString(), body,
+          testOn: testOn, timeout: timeout, skip: skip, tags: tags);
+
 
 /// Registers a function to be run before tests.
 ///

test/backend/declarer_test.dart

@@ -36,6 +36,15 @@ void main() {
       expect(bodyRun, isTrue);
     });
 
+    test("declares a test with an object as the description", () async {
+      var tests = declare(() {
+        test(Object, () {
+        });
+      });
+
+      expect(tests.single.name, equals("Object"));
+    });
+
     test("declares multiple tests", () {
       var tests = declare(() {
         test("description 1", () {});
@@ -277,6 +286,21 @@ void main() {
       expect(entries.single.entries.single.name, "group description");
     });
 
+    test("tests inherit the group's description when it's not a string", () {
+      var entries = declare(() {
+        group(Object, () {
+          test("description", () {});
+        });
+      });
+
+      expect(entries, hasLength(1));
+      expect(entries.single, new isInstanceOf<Group>());
+      expect(entries.single.name, equals("Object"));
+      expect(entries.single.entries, hasLength(1));
+      expect(entries.single.entries.single, new isInstanceOf<Test>());
+      expect(entries.single.entries.single.name, "Object description");
+    });
+
     test("a test's timeout factor is applied to the group's", () {
       var entries = declare(() {
         group("group", () {