Add a new kind of suite to ease test.dart integration.

pkg/testing/lib/src/test_dart.dart

+// Copyright (c) 2016, 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.md file.
+
+library testing.test_dart;
+
+import 'dart:convert' show
+    JSON;
+
+import 'dart:io' show
+    Platform;
+
+import 'suite.dart' show
+    Suite;
+
+/// A suite that runs test.dart.
+class TestDart extends Suite {
+  final String common;
+
+  final String processes;
+
+  final List<String> commandLines;
+
+  TestDart(String name, this.common, this.processes, this.commandLines)
+      : super(name, "test_dart",
+          // This suite doesn't know what it's status file is because test.dart
+          // doesn't know.
+          null);
+
+  factory TestDart.fromJsonMap(Uri base, Map json, String name, String kind) {
+    String common = json["common"] ?? "";
+    // TODO(ahe): Compute this value based on number of cores.
+    String processes = json["processes"] ?? "-j16";
+    List<String> commandLines = json["command-lines"] ?? <String>[];
+    return new TestDart(name, common, processes, commandLines);
+  }
+
+  void writeFirstImportOn(StringSink sink) {
+    sink.writeln("import 'dart:io' as io;");
+    sink.writeln(
+        "import 'package:testing/src/stdio_process.dart' show StdioProcess;");
+  }
+
+  void writeRunCommandOn(StringSink sink) {
+    Uri dartVm;
+    if (Platform.isMacOS) {
+      dartVm = Uri.base.resolve("tools/sdks/mac/dart-sdk/bin/dart");
+    } else if (Platform.isWindows) {
+      dartVm = Uri.base.resolve("tools/sdks/win/dart-sdk/bin/dart.exe");
+    } else if (Platform.isLinux) {
+      dartVm = Uri.base.resolve("tools/sdks/linux/dart-sdk/bin/dart");
+    } else {
+      throw "Operating system not supported: ${Platform.operatingSystem}";
+    }
+    List<String> processedArguments = <String>[];
+    processedArguments.add(Uri.base.resolve(
+            "tools/testing/dart/package_testing_support.dart").toFilePath());
+    for (String commandLine in commandLines) {
+      String arguments = common;
+      arguments += " $processes";
+      arguments += " $commandLine";
+      processedArguments.add(arguments);
+    }
+    String executable = JSON.encode(dartVm.toFilePath());
+    String arguments = JSON.encode(processedArguments);
+    sink.write("""
+  {
+    print('Running $arguments');
+    StdioProcess process = await StdioProcess.run($executable, $arguments,
+        suppressOutput: false, timeout: null);
+    if (process.exitCode != 0) {
+      print(process.output);
+      io.exitCode = 1;
+    }
+  }
+""");
+  }
+
+  String toString() {
+    return "TestDart($name, ${JSON.encode(common)}, ${JSON.encode(processes)},"
+        " ${JSON.encode(commandLines)})";
+  }
+}