rework analyzer_cli to use ContextBuilder getAnalysisOptions

pkg/analyzer_cli/test/analysis_options_test.dart

+import 'dart:async';
+import 'dart:io';
+
+import 'package:analyzer_cli/src/driver.dart' show Driver, outSink, errorSink;
+import 'package:analyzer_cli/src/options.dart' show ExitHandler, exitHandler;
+import 'package:path/path.dart' as path;
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import 'utils.dart' show testDirectory, withTempDir;
+
+main() {
+  defineReflectiveTests(OptionsTest);
+}
+
+
+@reflectiveTest
+class OptionsTest {
+  _Runner runner;
+
+  void setUp() {
+    runner = new _Runner.setUp();
+  }
+
+  void tearDown() {
+    runner.tearDown();
+    runner = null;
+  }
+
+  test_options() async {
+    Future<Null> copy(FileSystemEntity src, String dstPath) async {
+      if (src is Directory) {
+        await (new Directory(dstPath)).create(recursive: true);
+        for (FileSystemEntity entity in src.listSync()) {
+          await copy(entity, path.join(dstPath, path.basename(entity.path)));
+        }
+      } else if (src is File) {
+        await src.copy(dstPath);
+      }
+    }
+
+    // Copy to temp dir so that existing analysis options
+    // in the test directory hierarchy do not interfere
+    var projDir = path.join(testDirectory, 'data', 'flutter_analysis_options');
+    await withTempDir((String tempDirPath) async {
+      await copy(new Directory(projDir), tempDirPath);
+      var expectedPath = path.join(tempDirPath, 'somepkgs', 'flutter', 'lib', 'analysis_options_user.yaml');
+      expect(FileSystemEntity.isFileSync(expectedPath), isTrue);
+      await runner.run2([
+        "--packages",
+        path.join(tempDirPath, 'packagelist'),
+        path.join(tempDirPath, 'lib', 'main.dart')
+      ]);
+      expect(runner.stdout, contains('The parameter \'child\' is required'));
+      // Should be a warning as specified in analysis_options_user.yaml
+      // not a hint
+      expect(runner.stdout, contains('1 warning found'));
+    });
+  }
+}
+
+class _Runner {
+  final _stdout = new StringBuffer();
+  final _stderr = new StringBuffer();
+
+  final StringSink _savedOutSink;
+  final StringSink _savedErrorSink;
+  final int _savedExitCode;
+  final ExitHandler _savedExitHandler;
+
+  _Runner.setUp()
+      : _savedOutSink = outSink,
+        _savedErrorSink = errorSink,
+        _savedExitHandler = exitHandler,
+        _savedExitCode = exitCode {
+    outSink = _stdout;
+    errorSink = _stderr;
+    exitHandler = (_) {};
+  }
+
+  String get stderr => _stderr.toString();
+
+  String get stdout => _stdout.toString();
+
+  Future<Null> run2(List<String> args) async {
+    await new Driver().start(args);
+    if (stderr.isNotEmpty) {
+      fail("Unexpected output to stderr:\n$stderr");
+    }
+  }
+
+  void tearDown() {
+    outSink = _savedOutSink;
+    errorSink = _savedErrorSink;
+    exitCode = _savedExitCode;
+    exitHandler = _savedExitHandler;
+  }
+}