Re-apply "Remove unittest and matcher from the repo."

pkg/matcher/test/prints_matcher_test.dart

-// Copyright (c) 2014, 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 matcher.prints_matchers_test;
-
-import 'dart:async';
-
-import 'package:matcher/matcher.dart';
-import 'package:unittest/unittest.dart';
-
-import 'test_utils.dart';
-
-/// The VM and dart2js have different toStrings for closures.
-final closureToString = (() {}).toString();
-
-void main() {
-  initUtils();
-
-  group('synchronous', () {
-    test("passes with an expected print", () {
-      shouldPass(() => print("Hello, world!"), prints("Hello, world!\n"));
-    });
-
-    test("combines multiple prints", () {
-      shouldPass(() {
-        print("Hello");
-        print("World!");
-      }, prints("Hello\nWorld!\n"));
-    });
-
-    test("works with a Matcher", () {
-      shouldPass(() => print("Hello, world!"), prints(contains("Hello")));
-    });
-
-    test("describes a failure nicely", () {
-      shouldFail(() => print("Hello, world!"), prints("Goodbye, world!\n"),
-          "Expected: prints 'Goodbye, world!\\n' ''"
-          "  Actual: <$closureToString> "
-          "   Which: printed 'Hello, world!\\n' ''"
-          "   Which: is different. "
-          "Expected: Goodbye, w ... "
-          "  Actual: Hello, wor ... "
-          "          ^ Differ at offset 0");
-    });
-
-    test("describes a failure with a non-descriptive Matcher nicely", () {
-      shouldFail(() => print("Hello, world!"), prints(contains("Goodbye")),
-          "Expected: prints contains 'Goodbye'"
-          "  Actual: <$closureToString> "
-          "   Which: printed 'Hello, world!\\n' ''");
-    });
-
-    test("describes a failure with no text nicely", () {
-      shouldFail(() {}, prints(contains("Goodbye")),
-          "Expected: prints contains 'Goodbye'"
-          "  Actual: <$closureToString> "
-          "   Which: printed nothing.");
-    });
-  });
-
-  group('asynchronous', () {
-    test("passes with an expected print", () {
-      shouldPass(() => new Future(() => print("Hello, world!")),
-          prints("Hello, world!\n"));
-    });
-
-    test("combines multiple prints", () {
-      shouldPass(() => new Future(() {
-        print("Hello");
-        print("World!");
-      }), prints("Hello\nWorld!\n"));
-    });
-
-    test("works with a Matcher", () {
-      shouldPass(() => new Future(() => print("Hello, world!")),
-          prints(contains("Hello")));
-    });
-
-    test("describes a failure nicely", () {
-      shouldFail(() => new Future(() => print("Hello, world!")),
-          prints("Goodbye, world!\n"),
-          "Expected: 'Goodbye, world!\\n' ''"
-          "  Actual: 'Hello, world!\\n' ''"
-          "   Which: is different. "
-          "Expected: Goodbye, w ... "
-          "  Actual: Hello, wor ... "
-          "          ^ Differ at offset 0",
-          isAsync: true);
-    });
-
-    test("describes a failure with a non-descriptive Matcher nicely", () {
-      shouldFail(() => new Future(() => print("Hello, world!")),
-          prints(contains("Goodbye")),
-          "Expected: contains 'Goodbye'"
-          "  Actual: 'Hello, world!\\n' ''",
-          isAsync: true);
-    });
-
-    test("describes a failure with no text nicely", () {
-      shouldFail(() => new Future.value(), prints(contains("Goodbye")),
-          "Expected: contains 'Goodbye'"
-          "  Actual: ''",
-          isAsync: true);
-    });
-  });
-}