Replace the existing unittest APIs with the new runner infrastructure.

test/expect_async_test.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2015, 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 unittest.expect_async_test;
-
-import 'dart:async';
-
-import 'package:metatest/metatest.dart';
+import 'package:unittest/src/state.dart';
 import 'package:unittest/unittest.dart';
 
-void main() => initTests(_test);
-
-void _test(message) {
-  initMetatest(message);
-
-  var count = 0;
-
-  expectTestsPass('expect async test', () {
-    test('expectAsync zero params', () {
-      new Future.sync(expectAsync(() {
-        ++count;
-      }));
-    });
-
-    test('expectAsync 1 param', () {
-      var func = expectAsync((arg) {
-        expect(arg, 0);
-        ++count;
-      });
-      new Future.sync(() => func(0));
-    });
-
-    test('expectAsync 2 param', () {
-      var func = expectAsync((arg0, arg1) {
-        expect(arg0, 0);
-        expect(arg1, 1);
-        ++count;
-      });
-      new Future.sync(() => func(0, 1));
-    });
-
-    test('single arg to Future.catchError', () {
-      var func = expectAsync((error) {
-        expect(error, isStateError);
-        ++count;
-      });
-
-      new Future(() {
-        throw new StateError('test');
-      }).catchError(func);
-    });
-
-    test('2 args to Future.catchError', () {
-      var func = expectAsync((error, stack) {
-        expect(error, isStateError);
-        expect(stack is StackTrace, isTrue);
-        ++count;
-      });
-
-      new Future(() {
-        throw new StateError('test');
-      }).catchError(func);
-    });
-
-    test('zero of two optional positional args', () {
-      var func = expectAsync(([arg0 = true, arg1 = true]) {
-        expect(arg0, isTrue);
-        expect(arg1, isTrue);
-        ++count;
-      });
-
-      new Future.sync(() => func());
-    });
-
-    test('one of two optional positional args', () {
-      var func = expectAsync(([arg0 = true, arg1 = true]) {
-        expect(arg0, isFalse);
-        expect(arg1, isTrue);
-        ++count;
-      });
-
-      new Future.sync(() => func(false));
-    });
-
-    test('two of two optional positional args', () {
-      var func = expectAsync(([arg0 = true, arg1 = true]) {
-        expect(arg0, isFalse);
-        expect(arg1, isNull);
-        ++count;
-      });
-
-      new Future.sync(() => func(false, null));
-    });
-
-    test('verify count', () {
-      expect(count, 8);
+import 'utils.dart';
+
+void main() {
+  group("supports a function with this many arguments:", () {
+    test("0", () {
+      var callbackRun = false;
+      return runTest(() {
+        expectAsync(() {
+          callbackRun = true;
+        })();
+      }).then((liveTest) {
+        expectTestPassed(liveTest);
+        expect(callbackRun, isTrue);
+      });
+    });
+
+    test("1", () {
+      var callbackRun = false;
+      return runTest(() {
+        expectAsync((arg) {
+          expect(arg, equals(1));
+          callbackRun = true;
+        })(1);
+      }).then((liveTest) {
+        expectTestPassed(liveTest);
+        expect(callbackRun, isTrue);
+      });
+    });
+
+    test("2", () {
+      var callbackRun = false;
+      return runTest(() {
+        expectAsync((arg1, arg2) {
+          expect(arg1, equals(1));
+          expect(arg2, equals(2));
+          callbackRun = true;
+        })(1, 2);
+      }).then((liveTest) {
+        expectTestPassed(liveTest);
+        expect(callbackRun, isTrue);
+      });
+    });
+
+    test("3", () {
+      var callbackRun = false;
+      return runTest(() {
+        expectAsync((arg1, arg2, arg3) {
+          expect(arg1, equals(1));
+          expect(arg2, equals(2));
+          expect(arg3, equals(3));
+          callbackRun = true;
+        })(1, 2, 3);
+      }).then((liveTest) {
+        expectTestPassed(liveTest);
+        expect(callbackRun, isTrue);
+      });
+    });
+
+    test("4", () {
+      var callbackRun = false;
+      return runTest(() {
+        expectAsync((arg1, arg2, arg3, arg4) {
+          expect(arg1, equals(1));
+          expect(arg2, equals(2));
+          expect(arg3, equals(3));
+          expect(arg4, equals(4));
+          callbackRun = true;
+        })(1, 2, 3, 4);
+      }).then((liveTest) {
+        expectTestPassed(liveTest);
+        expect(callbackRun, isTrue);
+      });
+    });
+
+    test("5", () {
+      var callbackRun = false;
+      return runTest(() {
+        expectAsync((arg1, arg2, arg3, arg4, arg5) {
+          expect(arg1, equals(1));
+          expect(arg2, equals(2));
+          expect(arg3, equals(3));
+          expect(arg4, equals(4));
+          expect(arg5, equals(5));
+          callbackRun = true;
+        })(1, 2, 3, 4, 5);
+      }).then((liveTest) {
+        expectTestPassed(liveTest);
+        expect(callbackRun, isTrue);
+      });
+    });
+
+    test("6", () {
+      var callbackRun = false;
+      return runTest(() {
+        expectAsync((arg1, arg2, arg3, arg4, arg5, arg6) {
+          expect(arg1, equals(1));
+          expect(arg2, equals(2));
+          expect(arg3, equals(3));
+          expect(arg4, equals(4));
+          expect(arg5, equals(5));
+          expect(arg6, equals(6));
+          callbackRun = true;
+        })(1, 2, 3, 4, 5, 6);
+      }).then((liveTest) {
+        expectTestPassed(liveTest);
+        expect(callbackRun, isTrue);
+      });
+    });
+  });
+
+  group("with optional arguments", () {
+    test("allows them to be passed", () {
+      var callbackRun = false;
+      return runTest(() {
+        expectAsync(([arg = 1]) {
+          expect(arg, equals(2));
+          callbackRun = true;
+        })(2);
+      }).then((liveTest) {
+        expectTestPassed(liveTest);
+        expect(callbackRun, isTrue);
+      });
+    });
+
+    test("allows them not to be passed", () {
+      var callbackRun = false;
+      return runTest(() {
+        expectAsync(([arg = 1]) {
+          expect(arg, equals(1));
+          callbackRun = true;
+        })();
+      }).then((liveTest) {
+        expectTestPassed(liveTest);
+        expect(callbackRun, isTrue);
+      });
+    });
+  });
+
+  test("doesn't support a function with 7 arguments", () {
+    expect(() => expectAsync((_1, _2, _3, _4, _5, _6, _7) {}),
+        throwsArgumentError);
+  });
+
+  group("by default", () {
+    test("won't allow the test to complete until it's called", () {
+      return expectTestBlocks(
+          () => expectAsync(() {}),
+          (callback) => callback());
+    });
+
+    test("may only be called once", () {
+      return runTest(() {
+        var callback = expectAsync(() {});
+        callback();
+        callback();
+      }).then((liveTest) {
+        expectTestFailed(liveTest,
+            "Callback called more times than expected (1).");
+      });
+    });
+  });
+
+  group("with count", () {
+    test("won't allow the test to complete until it's called at least that "
+        "many times", () {
+      var liveTest;
+      var future;
+      liveTest = createTest(() {
+        var callback = expectAsync(() {}, count: 3);
+        future = pumpEventQueue().then((_) {
+          expect(liveTest.state.status, equals(Status.running));
+          callback();
+          return pumpEventQueue();
+        }).then((_) {
+          expect(liveTest.state.status, equals(Status.running));
+          callback();
+          return pumpEventQueue();
+        }).then((_) {
+          expect(liveTest.state.status, equals(Status.running));
+          callback();
+        });
+      });
+
+      return liveTest.run().then((_) {
+        expectTestPassed(liveTest);
+        // Ensure that the outer test doesn't complete until the inner future
+        // completes.
+        return future;
+      });
+    });
+
+    test("will throw an error if it's called more than that many times", () {
+      return runTest(() {
+        var callback = expectAsync(() {}, count: 3);
+        callback();
+        callback();
+        callback();
+        callback();
+      }).then((liveTest) {
+        expectTestFailed(
+            liveTest, "Callback called more times than expected (3).");
+      });
+    });
+
+    group("0,", () {
+      test("won't block the test's completion", () {
+        expectAsync(() {}, count: 0);
+      });
+
+      test("will throw an error if it's ever called", () {
+        return runTest(() {
+          expectAsync(() {}, count: 0)();
+        }).then((liveTest) {
+          expectTestFailed(
+              liveTest, "Callback called more times than expected (0).");
+        });
+      });
+    });
+  });
+
+  group("with max", () {
+    test("will allow the callback to be called that many times", () {
+      var callback = expectAsync(() {}, max: 3);
+      callback();
+      callback();
+      callback();
+    });
+
+    test("will allow the callback to be called fewer than that many times", () {
+      var callback = expectAsync(() {}, max: 3);
+      callback();
+    });
+
+    test("will throw an error if it's called more than that many times", () {
+      return runTest(() {
+        var callback = expectAsync(() {}, max: 3);
+        callback();
+        callback();
+        callback();
+        callback();
+      }).then((liveTest) {
+        expectTestFailed(
+            liveTest, "Callback called more times than expected (3).");
+      });
+    });
+
+    test("-1, will allow the callback to be called any number of times", () {
+      var callback = expectAsync(() {}, max: -1);
+      for (var i = 0; i < 20; i++) {
+        callback();
+      }
+    });
+  });
+
+  test("will throw an error if max is less than count", () {
+    expect(() => expectAsync(() {}, max: 1, count: 2),
+        throwsArgumentError);
+  });
+
+  group("expectAsyncUntil()", () {
+    test("won't allow the test to complete until isDone returns true", () {
+      var liveTest;
+      var future;
+      liveTest = createTest(() {
+        var done = false;
+        var callback = expectAsyncUntil(() {}, () => done);
+
+        future = pumpEventQueue().then((_) {
+          expect(liveTest.state.status, equals(Status.running));
+          callback();
+          return pumpEventQueue();
+        }).then((_) {
+          expect(liveTest.state.status, equals(Status.running));
+          done = true;
+          callback();
+        });
+      });
+
+      return liveTest.run().then((_) {
+        expectTestPassed(liveTest);
+        // Ensure that the outer test doesn't complete until the inner future
+        // completes.
+        return future;
+      });
+    });
+
+    test("doesn't call isDone until after the callback is called", () {
+      var callbackRun = false;
+      expectAsyncUntil(() => callbackRun = true, () {
+        expect(callbackRun, isTrue);
+        return true;
+      })();
+    });
+  });
+
+  group("with errors", () {
+    test("reports them to the current test", () {
+      return runTest(() {
+        expectAsync(() => throw new TestFailure('oh no'))();
+      }).then((liveTest) {
+        expectTestFailed(liveTest, 'oh no');
+      });
+    });
+
+    test("swallows them and returns null", () {
+      var returnValue;
+      var caughtError = false;
+      return runTest(() {
+        try {
+          returnValue = expectAsync(() => throw new TestFailure('oh no'))();
+        } on TestFailure catch (_) {
+          caughtError = true;
+        }
+      }).then((liveTest) {
+        expectTestFailed(liveTest, 'oh no');
+        expect(returnValue, isNull);
+        expect(caughtError, isFalse);
+      });
     });
   });
 }