Convert a bunch of tests to use scheduled_test's infrastructure.

test/runner/runner_test.dart

 // 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.
 
 @TestOn("vm")
 
 import 'dart:io';
 import 'dart:math' as math;
 
 import 'package:path/path.dart' as p;
+import 'package:scheduled_test/descriptor.dart' as d;
+import 'package:scheduled_test/scheduled_stream.dart';
+import 'package:scheduled_test/scheduled_test.dart';
 import 'package:test/src/util/exit_codes.dart' as exit_codes;
-import 'package:test/src/util/io.dart';
-import 'package:test/test.dart';
 
 import '../io.dart';
 
-String _sandbox;
-
 final _success = """
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("success", () {});
 }
 """;
 
@@ skipping 35 matching lines @@
           [compact]            A single line, updated continuously.
           [expanded]           A separate line for each update.
 
     --verbose-trace            Whether to emit stack traces with core library frames.
     --js-trace                 Whether to emit raw JavaScript stack traces for browser tests.
     --[no-]color               Whether to use terminal colors.
                                (auto-detected by default)
 """;
 
 void main() {
-  setUp(() {
-    _sandbox = createTempDir();
-  });
-
-  tearDown(() {
-    new Directory(_sandbox).deleteSync(recursive: true);
-  });
+  useSandbox();
 
   test("prints help information", () {
-    var result = _runTest(["--help"]);
-    expect(result.stdout, equals("""
+    var test = runTest(["--help"]);
+    expectStdoutEquals(test, """
 Runs tests in this package.
 
-$_usage"""));
-    expect(result.exitCode, equals(exit_codes.success));
+$_usage""");
+    test.shouldExit(0);
   });
 
   group("fails gracefully if", () {
     test("an invalid option is passed", () {
-      var result = _runTest(["--asdf"]);
-      expect(result.stderr, equals("""
+      var test = runTest(["--asdf"]);
+      expectStderrEquals(test, """
 Could not find an option named "asdf".
 
-$_usage"""));
-      expect(result.exitCode, equals(exit_codes.usage));
+$_usage""");
+      test.shouldExit(exit_codes.usage);
     });
 
     test("a non-existent file is passed", () {
-      var result = _runTest(["file"]);
-      expect(result.stdout, allOf([
-        contains('-1: loading file'),
-        contains('Failed to load "file": Does not exist.')
+      var test = runTest(["file"]);
+      test.stdout.expect(containsInOrder([
+        '-1: loading file',
+        'Failed to load "file": Does not exist.'
       ]));
-      expect(result.exitCode, equals(1));
+      test.shouldExit(1);
     });
 
     test("the default directory doesn't exist", () {
-      var result = _runTest([]);
-      expect(result.stderr, equals("""
+      var test = runTest([]);
+      expectStderrEquals(test, """
 No test files were passed and the default "test/" directory doesn't exist.
 
-$_usage"""));
-      expect(result.exitCode, equals(exit_codes.data));
+$_usage""");
+      test.shouldExit(exit_codes.data);
     });
 
     test("a test file fails to load", () {
-      var testPath = p.join(_sandbox, "test.dart");
-      new File(testPath).writeAsStringSync("invalid Dart file");
-      var result = _runTest(["test.dart"]);
+      d.file("test.dart", "invalid Dart file").create();
+      var test = runTest(["test.dart"]);
 
-      expect(result.stdout, allOf([
-        contains('-1: loading test.dart'),
-        contains(
-          '  Failed to load "${p.relative(testPath, from: _sandbox)}":\n'
-          "  line 1 pos 1: unexpected token 'invalid'\n"
-          "  invalid Dart file\n"
-          "  ^\n")
+      test.stdout.expect(containsInOrder([
+        '-1: loading test.dart',
+        'Failed to load "test.dart":',
+        "line 1 pos 1: unexpected token 'invalid'",
+        "invalid Dart file",
+        "^"
       ]));
-      expect(result.exitCode, equals(1));
+      test.shouldExit(1);
     });
 
     // This syntax error is detected lazily, and so requires some extra
     // machinery to support.
     test("a test file fails to parse due to a missing semicolon", () {
-      var testPath = p.join(_sandbox, "test.dart");
-      new File(testPath).writeAsStringSync("void main() {foo}");
-      var result = _runTest(["test.dart"]);
+      d.file("test.dart", "void main() {foo}").create();
+      var test = runTest(["test.dart"]);
 
-      expect(result.stdout, allOf([
-        contains('-1: loading test.dart'),
-        contains(
-          '  Failed to load "${p.relative(testPath, from: _sandbox)}":\n'
-          "  line 1 pos 17: semicolon expected\n"
-          "  void main() {foo}\n"
-          "                  ^\n")
+      test.stdout.expect(containsInOrder([
+        '-1: loading test.dart',
+        'Failed to load "test.dart":',
+        'line 1 pos 17: semicolon expected',
+        'void main() {foo}',
+        '                ^'
       ]));
-      expect(result.exitCode, equals(1));
+      test.shouldExit(1);
     });
 
     // This is slightly different from the above test because it's an error
     // that's caught first by the analyzer when it's used to parse the file.
     test("a test file fails to parse", () {
-      var testPath = p.join(_sandbox, "test.dart");
-      new File(testPath).writeAsStringSync("@TestOn)");
-      var result = _runTest(["test.dart"]);
+      d.file("test.dart", "@TestOn)").create();
+      var test = runTest(["test.dart"]);
 
-      expect(result.stdout, allOf([
-        contains('-1: loading test.dart'),
-        contains(
-          '  Failed to load "${p.relative(testPath, from: _sandbox)}":\n'
-          "  line 1 pos 8: unexpected token ')'\n"
-          "  @TestOn)\n"
-          "         ^\n")
+      test.stdout.expect(containsInOrder([
+        '-1: loading test.dart',
+        'Failed to load "test.dart":',
+        "line 1 pos 8: unexpected token ')'",
+        "@TestOn)",
+        "       ^"
       ]));
-      expect(result.exitCode, equals(1));
+      test.shouldExit(1);
     });
 
     test("an annotation's structure is invalid", () {
-      var testPath = p.join(_sandbox, "test.dart");
-      new File(testPath).writeAsStringSync("@TestOn()\nlibrary foo;");
-      var result = _runTest(["test.dart"]);
+      d.file("test.dart", "@TestOn()\nlibrary foo;").create();
+      var test = runTest(["test.dart"]);
 
-      expect(result.stdout, allOf([
-        contains('-1: loading test.dart'),
-        contains(
-          '  Failed to load "${p.relative(testPath, from: _sandbox)}":\n'
-          "  Error on line 1, column 8: TestOn takes 1 argument.\n"
-          "  @TestOn()\n"
-          "         ^^\n")
+      test.stdout.expect(containsInOrder([
+        '-1: loading test.dart',
+        'Failed to load "test.dart":',
+        "Error on line 1, column 8: TestOn takes 1 argument.",
+        "@TestOn()",
+        "       ^^"
       ]));
-      expect(result.exitCode, equals(1));
+      test.shouldExit(1);
     });
 
     test("an annotation's contents are invalid", () {
-      var testPath = p.join(_sandbox, "test.dart");
-      new File(testPath).writeAsStringSync("@TestOn('zim')\nlibrary foo;");
-      var result = _runTest(["test.dart"]);
+      d.file("test.dart", "@TestOn('zim')\nlibrary foo;").create();
+      var test = runTest(["test.dart"]);
 
-      expect(result.stdout, allOf([
-        contains('-1: loading test.dart'),
-        contains(
-          '  Failed to load "${p.relative(testPath, from: _sandbox)}":\n'
-          "  Error on line 1, column 10: Undefined variable.\n"
-          "  @TestOn('zim')\n"
-          "           ^^^\n")
+      test.stdout.expect(containsInOrder([
+        '-1: loading test.dart',
+        'Failed to load "test.dart":',
+        "Error on line 1, column 10: Undefined variable.",
+        "@TestOn('zim')",
+        "         ^^^"
       ]));
-      expect(result.exitCode, equals(1));
+      test.shouldExit(1);
     });
 
     test("a test file throws", () {
-      var testPath = p.join(_sandbox, "test.dart");
-      new File(testPath).writeAsStringSync("void main() => throw 'oh no';");
+      d.file("test.dart", "void main() => throw 'oh no';").create();
+      var test = runTest(["test.dart"]);
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, allOf([
-        contains('-1: loading test.dart'),
-        contains(
-            'Failed to load "${p.relative(testPath, from: _sandbox)}": oh no')
+      test.stdout.expect(containsInOrder([
+        '-1: loading test.dart',
+        'Failed to load "test.dart": oh no'
       ]));
-      expect(result.exitCode, equals(1));
+      test.shouldExit(1);
     });
 
     test("a test file doesn't have a main defined", () {
-      var testPath = p.join(_sandbox, "test.dart");
-      new File(testPath).writeAsStringSync("void foo() {}");
+      d.file("test.dart", "void foo() {}").create();
+      var test = runTest(["test.dart"]);
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, allOf([
-        contains('-1: loading test.dart'),
-        contains(
-            'Failed to load "${p.relative(testPath, from: _sandbox)}": No '
-                'top-level main() function defined.')
+      test.stdout.expect(containsInOrder([
+        '-1: loading test.dart',
+        'Failed to load "test.dart": No top-level main() function defined.'
       ]));
-      expect(result.exitCode, equals(1));
+      test.shouldExit(1);
     });
 
     test("a test file has a non-function main", () {
-      var testPath = p.join(_sandbox, "test.dart");
-      new File(testPath).writeAsStringSync("int main;");
+      d.file("test.dart", "int main;").create();
+      var test = runTest(["test.dart"]);
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, allOf([
-        contains('-1: loading test.dart'),
-        contains(
-            'Failed to load "${p.relative(testPath, from: _sandbox)}": '
-                'Top-level main getter is not a function.')
+      test.stdout.expect(containsInOrder([
+        '-1: loading test.dart',
+        'Failed to load "test.dart": Top-level main getter is not a function.'
       ]));
-      expect(result.exitCode, equals(1));
+      test.shouldExit(1);
     });
 
     test("a test file has a main with arguments", () {
-      var testPath = p.join(_sandbox, "test.dart");
-      new File(testPath).writeAsStringSync("void main(arg) {}");
+      d.file("test.dart", "void main(arg) {}").create();
+      var test = runTest(["test.dart"]);
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, allOf([
-        contains('-1: loading test.dart'),
-        contains(
-            'Failed to load "${p.relative(testPath, from: _sandbox)}": '
-                'Top-level main() function takes arguments.')
+      test.stdout.expect(containsInOrder([
+        '-1: loading test.dart',
+        'Failed to load "test.dart": Top-level main() function takes arguments.'
       ]));
-      expect(result.exitCode, equals(1));
+      test.shouldExit(1);
     });
 
     test("multiple load errors occur", () {
-      var testPath = p.join(_sandbox, "test.dart");
-      new File(testPath).writeAsStringSync("invalid Dart file");
-      var result = _runTest(["test.dart", "nonexistent.dart"]);
+      d.file("test.dart", "invalid Dart file").create();
+      var test = runTest(["test.dart", "nonexistent.dart"]);
 
-      expect(result.stdout, allOf([
-        contains('loading test.dart'),
-        contains(
-          '  Failed to load "test.dart":\n'
-          "  line 1 pos 1: unexpected token 'invalid'\n"
-          "  invalid Dart file\n"
-          "  ^\n"),
-        contains('loading nonexistent.dart'),
-        contains('Failed to load "nonexistent.dart": Does not exist.')
+      test.stdout.expect(containsInOrder([
+        'loading nonexistent.dart',
+        'Failed to load "nonexistent.dart": Does not exist.',
+        'loading test.dart',
+        'Failed to load "test.dart":',
+        "line 1 pos 1: unexpected token 'invalid'",
+        "invalid Dart file",
+        "^"
       ]));
+      test.shouldExit(1);
     });
 
     // TODO(nweiz): test what happens when a test file is unreadable once issue
     // 15078 is fixed.
   });
 
   group("runs successful tests", () {
     test("defined in a single file", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync(_success);
-      var result = _runTest(["test.dart"]);
-      expect(result.exitCode, equals(0));
+      d.file("test.dart", _success).create();
+      var test = runTest(["test.dart"]);
+      test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
+      test.shouldExit(0);
     });
 
     test("defined in a directory", () {
       for (var i = 0; i < 3; i++) {
-        new File(p.join(_sandbox, "${i}_test.dart"))
-            .writeAsStringSync(_success);
+        d.file("${i}_test.dart", _success).create();
       }
 
-      var result = _runTest(["."]);
-      expect(result.exitCode, equals(0));
+      var test = runTest(["."]);
+      test.stdout.expect(consumeThrough(contains("+3: All tests passed!")));
+      test.shouldExit(0);
     });
 
     test("defaulting to the test directory", () {
-      new Directory(p.join(_sandbox, "test")).createSync();
-      for (var i = 0; i < 3; i++) {
-        new File(p.join(_sandbox, "test", "${i}_test.dart"))
-            .writeAsStringSync(_success);
-      }
+      d.dir("test", new Iterable.generate(3, (i) {
+        return d.file("${i}_test.dart", _success);
+      })).create();
 
-      var result = _runTest([]);
-      expect(result.exitCode, equals(0));
+      var test = runTest([]);
+      test.stdout.expect(consumeThrough(contains("+3: All tests passed!")));
+      test.shouldExit(0);
     });
 
     test("directly", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync(_success);
-      var result = _runDart([
+      d.file("test.dart", _success).create();
+      var test = runDart([
         "--package-root=${p.join(packageDir, 'packages')}",
         "test.dart"
       ]);
-      expect(result.stdout, contains("All tests passed!"));
-      expect(result.exitCode, equals(0));
+
+      test.stdout.expect(consumeThrough(contains("All tests passed!")));
+      test.shouldExit(0);
     });
 
     // Regression test; this broke in 0.12.0-beta.9.
     test("on a file in a subdirectory", () {
-      new Directory(p.join(_sandbox, "dir")).createSync();
-      new File(p.join(_sandbox, "dir", "test.dart"))
-          .writeAsStringSync(_success);
-      var result = _runTest(["dir/test.dart"]);
-      expect(result.exitCode, equals(0));
+      d.dir("dir", [d.file("test.dart", _success)]).create();
+
+      var test = runTest(["dir/test.dart"]);
+      test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
+      test.shouldExit(0);
     });
   });
 
   group("runs failing tests", () {
     test("defined in a single file", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync(_failure);
-      var result = _runTest(["test.dart"]);
-      expect(result.exitCode, equals(1));
+      d.file("test.dart", _failure).create();
+
+      var test = runTest(["test.dart"]);
+      test.stdout.expect(consumeThrough(contains("-1: Some tests failed.")));
+      test.shouldExit(1);
     });
 
     test("defined in a directory", () {
       for (var i = 0; i < 3; i++) {
-        new File(p.join(_sandbox, "${i}_test.dart"))
-            .writeAsStringSync(_failure);
+        d.file("${i}_test.dart", _failure).create();
       }
 
-      var result = _runTest(["."]);
-      expect(result.exitCode, equals(1));
+      var test = runTest(["."]);
+      test.stdout.expect(consumeThrough(contains("-3: Some tests failed.")));
+      test.shouldExit(1);
     });
 
     test("defaulting to the test directory", () {
-      new Directory(p.join(_sandbox, "test")).createSync();
-      for (var i = 0; i < 3; i++) {
-        new File(p.join(_sandbox, "test", "${i}_test.dart"))
-            .writeAsStringSync(_failure);
-      }
+      d.dir("test", new Iterable.generate(3, (i) {
+        return d.file("${i}_test.dart", _failure);
+      })).create();
 
-      var result = _runTest([]);
-      expect(result.exitCode, equals(1));
+      var test = runTest([]);
+      test.stdout.expect(consumeThrough(contains("-3: Some tests failed.")));
+      test.shouldExit(1);
     });
 
     test("directly", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync(_failure);
-      var result = _runDart([
+      d.file("test.dart", _failure).create();
+      var test = runDart([
         "--package-root=${p.join(packageDir, 'packages')}",
         "test.dart"
       ]);
-      expect(result.stdout, contains("Some tests failed."));
-      expect(result.exitCode, isNot(equals(0)));
+      test.stdout.expect(consumeThrough(contains("Some tests failed.")));
+      test.shouldExit(255);
     });
   });
 
   test("runs tests even when a file fails to load", () {
-    new File(p.join(_sandbox, "test.dart")).writeAsStringSync(_success);
-    var result = _runTest(["test.dart", "nonexistent.dart"]);
-    expect(result.stdout, contains("+1 -1: Some tests failed."));
-    expect(result.exitCode, equals(1));
+    d.file("test.dart", _success).create();
+
+    var test = runTest(["test.dart", "nonexistent.dart"]);
+    test.stdout.expect(consumeThrough(contains("+1 -1: Some tests failed.")));
+    test.shouldExit(1);
   });
 
   test("respects top-level @Timeout declarations", () {
-    new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+    d.file("test.dart", '''
 @Timeout(const Duration(seconds: 0))
 
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("timeout", () {});
 }
-''');
+''').create();
 
-    var result = _runTest(["test.dart"]);
-    expect(result.stdout, contains("Test timed out after 0 seconds."));
-    expect(result.stdout, contains("-1: Some tests failed."));
+    var test = runTest(["test.dart"]);
+    test.stdout.expect(containsInOrder([
+      "Test timed out after 0 seconds.",
+      "-1: Some tests failed."
+    ]));
+    test.shouldExit(1);
   });
 
   test("respects top-level @Skip declarations", () {
-    new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+    d.file("test.dart", '''
 @Skip()
 
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("fail", () => throw 'oh no');
 }
-''');
+''').create();
 
-    var result = _runTest(["test.dart"]);
-    expect(result.stdout, contains("+0 ~1: All tests skipped."));
+    var test = runTest(["test.dart"]);
+    test.stdout.expect(consumeThrough(contains("+0 ~1: All tests skipped.")));
+    test.shouldExit(0);
   });
 
   group("with onPlatform", () {
     test("respects matching Skips", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+      d.file("test.dart", '''
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("fail", () => throw 'oh no', onPlatform: {"vm": new Skip()});
 }
-''');
+''').create();
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, contains("+0 ~1: All tests skipped."));
+      var test = runTest(["test.dart"]);
+      test.stdout.expect(consumeThrough(contains("+0 ~1: All tests skipped.")));
+      test.shouldExit(0);
     });
 
     test("ignores non-matching Skips", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+      d.file("test.dart", '''
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("success", () {}, onPlatform: {"chrome": new Skip()});
 }
-''');
+''').create();
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, contains("+1: All tests passed!"));
+      var test = runTest(["test.dart"]);
+      test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
+      test.shouldExit(0);
     });
 
     test("respects matching Timeouts", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+      d.file("test.dart", '''
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("fail", () => throw 'oh no', onPlatform: {
     "vm": new Timeout(new Duration(seconds: 0))
   });
 }
-''');
+''').create();
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, contains("Test timed out after 0 seconds."));
-      expect(result.stdout, contains("-1: Some tests failed."));
+      var test = runTest(["test.dart"]);
+      test.stdout.expect(containsInOrder([
+        "Test timed out after 0 seconds.",
+        "-1: Some tests failed."
+      ]));
+      test.shouldExit(1);
     });
 
     test("ignores non-matching Timeouts", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+      d.file("test.dart", '''
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("success", () {}, onPlatform: {
     "chrome": new Timeout(new Duration(seconds: 0))
   });
 }
-''');
+''').create();
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, contains("+1: All tests passed!"));
+      var test = runTest(["test.dart"]);
+      test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
+      test.shouldExit(0);
     });
 
     test("applies matching platforms in order", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+      d.file("test.dart", '''
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("success", () {}, onPlatform: {
     "vm": new Skip("first"),
     "vm || windows": new Skip("second"),
     "vm || linux": new Skip("third"),
     "vm || mac-os": new Skip("fourth"),
     "vm || android": new Skip("fifth")
   });
 }
-''');
+''').create();
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, contains("Skip: fifth"));
-      expect(result.stdout, isNot(anyOf([
-        contains("Skip: first"),
-        contains("Skip: second"),
-        contains("Skip: third"),
-        contains("Skip: fourth")
-      ])));
+      var test = runTest(["test.dart"]);
+      test.stdout.fork().expect(never(contains("Skip: first")));
+      test.stdout.fork().expect(never(contains("Skip: second")));
+      test.stdout.fork().expect(never(contains("Skip: third")));
+      test.stdout.fork().expect(never(contains("Skip: fourth")));
+      test.stdout.expect(consumeThrough(contains("Skip: fifth")));
+      test.shouldExit(0);
     });
   });
 
   group("with an @OnPlatform annotation", () {
     test("respects matching Skips", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+      d.file("test.dart", '''
 @OnPlatform(const {"vm": const Skip()})
 
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("fail", () => throw 'oh no');
 }
-''');
+''').create();
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, contains("+0 ~1: All tests skipped."));
+      var test = runTest(["test.dart"]);
+      test.stdout.expect(consumeThrough(contains("+0 ~1: All tests skipped.")));
+      test.shouldExit(0);
     });
 
     test("ignores non-matching Skips", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+      d.file("test.dart", '''
 @OnPlatform(const {"chrome": const Skip()})
 
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("success", () {});
 }
-''');
+''').create();
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, contains("+1: All tests passed!"));
+      var test = runTest(["test.dart"]);
+      test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
+      test.shouldExit(0);
     });
 
     test("respects matching Timeouts", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+      d.file("test.dart", '''
 @OnPlatform(const {
   "vm": const Timeout(const Duration(seconds: 0))
 })
 
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("fail", () => throw 'oh no');
 }
-''');
+''').create();
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, contains("Test timed out after 0 seconds."));
-      expect(result.stdout, contains("-1: Some tests failed."));
+      var test = runTest(["test.dart"]);
+      test.stdout.expect(containsInOrder([
+        "Test timed out after 0 seconds.",
+        "-1: Some tests failed."
+      ]));
+      test.shouldExit(1);
     });
 
     test("ignores non-matching Timeouts", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync('''
+      d.file("test.dart", '''
 @OnPlatform(const {
   "chrome": const Timeout(const Duration(seconds: 0))
 })
 
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("success", () {});
 }
-''');
+''').create();
 
-      var result = _runTest(["test.dart"]);
-      expect(result.stdout, contains("+1: All tests passed!"));
+      var test = runTest(["test.dart"]);
+      test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
+      test.shouldExit(0);
     });
   });
 
   group("flags:", () {
     test("with the --color flag, uses colors", () {
-      new File(p.join(_sandbox, "test.dart")).writeAsStringSync(_failure);
-      var result = _runTest(["--color", "test.dart"]);
+      d.file("test.dart", _failure).create();
+      var test = runTest(["--color", "test.dart"]);
       // This is the color code for red.
-      expect(result.stdout, contains("\u001b[31m"));
+      test.stdout.expect(consumeThrough(contains("\u001b[31m")));
+      test.shouldExit();
     });
 
     group("with the --name flag,", () {
       test("selects tests with matching names", () {
-        new File(p.join(_sandbox, "test.dart")).writeAsStringSync("""
+        d.file("test.dart", """
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("selected 1", () {});
   test("nope", () => throw new TestFailure("oh no"));
   test("selected 2", () {});
 }
-""");
+""").create();
 
-        var result = _runTest(["--name", "selected", "test.dart"]);
-        expect(result.stdout, contains("+2: All tests passed!"));
-        expect(result.exitCode, equals(0));
+        var test = runTest(["--name", "selected", "test.dart"]);
+        test.stdout.expect(consumeThrough(contains("+2: All tests passed!")));
+        test.shouldExit(0);
       });
 
       test("supports RegExp syntax", () {
-        new File(p.join(_sandbox, "test.dart")).writeAsStringSync("""
+        d.file("test.dart", """
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("test 1", () {});
   test("test 2", () => throw new TestFailure("oh no"));
   test("test 3", () {});
 }
-""");
+""").create();
 
-        var result = _runTest(["--name", "test [13]", "test.dart"]);
-        expect(result.stdout, contains("+2: All tests passed!"));
-        expect(result.exitCode, equals(0));
+        var test = runTest(["--name", "test [13]", "test.dart"]);
+        test.stdout.expect(consumeThrough(contains("+2: All tests passed!")));
+        test.shouldExit(0);
       });
 
       test("produces an error when no tests match", () {
-        new File(p.join(_sandbox, "test.dart")).writeAsStringSync(_success);
+        d.file("test.dart", _success).create();
 
-        var result = _runTest(["--name", "no match", "test.dart"]);
-        expect(result.stderr,
-            contains('No tests match regular expression "no match".'));
-        expect(result.exitCode, equals(exit_codes.data));
+        var test = runTest(["--name", "no match", "test.dart"]);
+        test.stderr.expect(consumeThrough(
+            contains('No tests match regular expression "no match".')));
+        test.shouldExit(exit_codes.data);
       });
 
       test("doesn't filter out load exceptions", () {
-        var result = _runTest(["--name", "name", "file"]);
-        expect(result.stdout, allOf([
-          contains('-1: loading file'),
-          contains('Failed to load "file": Does not exist.')
+        var test = runTest(["--name", "name", "file"]);
+        test.stdout.expect(containsInOrder([
+          '-1: loading file',
+          '  Failed to load "file": Does not exist.'
         ]));
-        expect(result.exitCode, equals(1));
+        test.shouldExit(1);
       });
     });
 
     group("with the --plain-name flag,", () {
       test("selects tests with matching names", () {
-        new File(p.join(_sandbox, "test.dart")).writeAsStringSync("""
+        d.file("test.dart", """
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("selected 1", () {});
   test("nope", () => throw new TestFailure("oh no"));
   test("selected 2", () {});
 }
-""");
+""").create();
 
-        var result = _runTest(["--plain-name", "selected", "test.dart"]);
-        expect(result.stdout, contains("+2: All tests passed!"));
-        expect(result.exitCode, equals(0));
+        var test = runTest(["--plain-name", "selected", "test.dart"]);
+        test.stdout.expect(consumeThrough(contains("+2: All tests passed!")));
+        test.shouldExit(0);
       });
 
       test("doesn't support RegExp syntax", () {
-        new File(p.join(_sandbox, "test.dart")).writeAsStringSync("""
+        d.file("test.dart", """
 import 'dart:async';
 
 import 'package:test/test.dart';
 
 void main() {
   test("test 1", () => throw new TestFailure("oh no"));
   test("test 2", () => throw new TestFailure("oh no"));
   test("test [12]", () {});
 }
-""");
+""").create();
 
-        var result = _runTest(["--plain-name", "test [12]", "test.dart"]);
-        expect(result.stdout, contains("+1: All tests passed!"));
-        expect(result.exitCode, equals(0));
+        var test = runTest(["--plain-name", "test [12]", "test.dart"]);
+        test.stdout.expect(consumeThrough(contains("+1: All tests passed!")));
+        test.shouldExit(0);
       });
 
       test("produces an error when no tests match", () {
-        new File(p.join(_sandbox, "test.dart")).writeAsStringSync(_success);
+        d.file("test.dart", _success).create();
 
-        var result = _runTest(["--plain-name", "no match", "test.dart"]);
-        expect(result.stderr,
-            contains('No tests match "no match".'));
-        expect(result.exitCode, equals(exit_codes.data));
+        var test = runTest(["--plain-name", "no match", "test.dart"]);
+        test.stderr.expect(
+            consumeThrough(contains('No tests match "no match".')));
+        test.shouldExit(exit_codes.data);
       });
     });
   });
 }
-
-ProcessResult _runTest(List<String> args) =>
-    runTest(args, workingDirectory: _sandbox);
-
-ProcessResult _runDart(List<String> args) =>
-    runDart(args, workingDirectory: _sandbox);