Add 4 integration tests for the analysis domain.

pkg/analysis_server/test/integration/analysis/set_priority_files_test.dart

+// Copyright (c) 2017, 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.
+
+import 'package:analysis_server/plugin/protocol/protocol.dart';
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import '../integration_tests.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(SetPriorityFilesTest);
+  });
+}
+
+@reflectiveTest
+class SetPriorityFilesTest extends AbstractAnalysisServerIntegrationTest {
+  test_options() async {
+    String pathname = sourcePath('foo.dart');
+    writeFile(pathname, 'class Foo { void baz() {} }');
+    writeFile(sourcePath('bar.dart'), 'class Bar { void baz() {} }');
+
+    standardAnalysisSetup();
+    await sendAnalysisSetPriorityFiles([pathname]);
+
+    ServerStatusParams status = await analysisFinished;
+    expect(status.analysis.isAnalyzing, false);
+  }
+
+  @override
+  bool get enableNewAnalysisDriver => true;
+}