Fix and tests command line options

tests/compiler/dart2js/command_line_test.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 file.
+
+// Test the command line options of dart2js.
+
+import 'dart:async';
+
+import 'package:async_helper/async_helper.dart';
+import 'package:expect/expect.dart';
+
+import 'package:compiler/compiler_new.dart' as api;
+import 'package:compiler/src/commandline_options.dart';
+import 'package:compiler/src/dart2js.dart' as entry;
+import 'package:compiler/src/options.dart' show CompilerOptions;
+
+main() {
+  asyncTest(() async {
+    await test([], exitCode: 1);
+    await test(['foo.dart']);
+    await test([Flags.resolveOnly, 'foo.dart'],
+        resolveOnly: true,
+        resolutionOutput: Uri.base.resolve('out.data'));
+    await test(['--resolution-input=bar.dart', 'foo.dart'],
+        resolutionInputs: [Uri.base.resolve('bar.dart')]);
+    await test([Flags.resolveOnly, '--resolution-input=bar.dart', 'foo.dart'],
+        resolveOnly: true,
+        resolutionOutput: Uri.base.resolve('out.data'),
+        resolutionInputs: [Uri.base.resolve('bar.dart')]);
+    await test([Flags.resolveOnly, '--resolution-input=out.data', 'foo.dart'],
+        exitCode: 1);
+  });
+}
+
+Future test(List<String> arguments,
+    {int exitCode,
+     bool resolveOnly: false,
+     Uri resolutionOutput,
+     List<Uri> resolutionInputs}) async {
+  print('--------------------------------------------------------------------');
+  print('dart2js ${arguments.join(' ')}');
+  print('--------------------------------------------------------------------');
+  entry.CompileFunc oldCompileFunc = entry.compileFunc;
+  entry.ExitFunc oldExitFunc = entry.exitFunc;
+
+  CompilerOptions options;
+  int actualExitCode;
+  entry.compileFunc = (_options, input, diagnostics, output) {
+    options = _options;
+    return new Future<api.CompilationResult>.value(
+        new api.CompilationResult(null));
+  };
+  entry.exitFunc = (_exitCode) {
+    actualExitCode = _exitCode;
+    throw 'exited';
+  };
+  try {
+    await entry.compilerMain(arguments);
+  } catch (e, s) {
+    Expect.equals('exited', e, "Unexpected exception: $e\n$s");
+  }
+  Expect.equals(exitCode, actualExitCode, "Unexpected exit code");
+  if (actualExitCode == null) {
+    Expect.isNotNull(options, "Missing options object");
+    Expect.equals(resolveOnly, options.resolveOnly,
+        "Unexpected resolveOnly value");
+    Expect.equals(resolutionOutput, options.resolutionOutput,
+        "Unexpected resolutionOutput value");
+    if (resolutionInputs == null) {
+      Expect.isNull(options.resolutionInputs,
+          "Unexpected resolutionInputs value");
+    } else {
+      Expect.listEquals(resolutionInputs, options.resolutionInputs,
+          "Unexpected resolutionInputs value");
+    }
+  }
+
+  entry.compileFunc = oldCompileFunc;
+  entry.exitFunc = oldExitFunc;
+}