Server custom error severity support (#24452).

pkg/analyzer/test/source/error_processor_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.
+
+library analyzer.test.source.error_processor;
+
+import 'package:analyzer/source/analysis_options_provider.dart';
+import 'package:analyzer/source/error_processor.dart';
+import 'package:analyzer/src/context/context.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/error.dart';
+import 'package:analyzer/src/task/options.dart';
+import 'package:plugin/manager.dart';
+import 'package:plugin/plugin.dart';
+import 'package:unittest/unittest.dart';
+import 'package:yaml/src/yaml_node.dart';
+
+import '../generated/test_support.dart';
+import '../utils.dart';
+
+main() {
+  AnalysisError invalid_assignment =
+      new AnalysisError(new TestSource(), 0, 1, HintCode.INVALID_ASSIGNMENT, [
+    ['x'],
+    ['y']
+  ]);
+
+  AnalysisError missing_return =
+      new AnalysisError(new TestSource(), 0, 1, HintCode.MISSING_RETURN, [
+    ['x']
+  ]);
+
+  AnalysisError unused_local_variable = new AnalysisError(
+      new TestSource(), 0, 1, HintCode.UNUSED_LOCAL_VARIABLE, [
+    ['x']
+  ]);
+
+  AnalysisError use_of_void_result =
+      new AnalysisError(new TestSource(), 0, 1, HintCode.USE_OF_VOID_RESULT, [
+    ['x']
+  ]);
+
+  initializeTestEnvironment();
+  oneTimeSetup();
+
+  setUp(() {
+    context = new TestContext();
+  });
+
+  group('ErrorProcessorTest', () {
+    test('configureOptions', () {
+      configureOptions('''
+analyzer:
+  errors:
+    invalid_assignment: error # severity ERROR
+    missing_return: false # ignore
+    unused_local_variable: true # skipped
+    use_of_void_result: unsupported_action # skipped
+''');
+      expect(getProcessor(invalid_assignment).severity, ErrorSeverity.ERROR);
+      expect(getProcessor(missing_return).severity, isNull);
+      expect(getProcessor(unused_local_variable), isNull);
+      expect(getProcessor(use_of_void_result), isNull);
+    });
+  });
+
+  group('ErrorConfigTest', () {
+    var config = '''
+analyzer:
+  errors:
+    invalid_assignment: unsupported_action # should be skipped
+    missing_return: false
+    unused_local_variable: error
+''';
+
+    group('processing', () {
+      test('yaml map', () {
+        var options = optionsProvider.getOptionsFromString(config);
+        var errorConfig = new ErrorConfig(options['analyzer']['errors']);
+        expect(errorConfig.processors, hasLength(2));
+
+        // ignore
+        var missingReturnProcessor = errorConfig.processors
+            .firstWhere((p) => p.appliesTo(missing_return));
+        expect(missingReturnProcessor.severity, isNull);
+
+        // error
+        var unusedLocalProcessor = errorConfig.processors
+            .firstWhere((p) => p.appliesTo(unused_local_variable));
+        expect(unusedLocalProcessor.severity, ErrorSeverity.ERROR);
+
+        // skip
+        var invalidAssignmentProcessor = errorConfig.processors.firstWhere(
+            (p) => p.appliesTo(invalid_assignment),
+            orElse: () => null);
+        expect(invalidAssignmentProcessor, isNull);
+      });
+      test('string map', () {
+        var options = {
+          'invalid_assignment': 'unsupported_action', // should be skipped
+          'missing_return': 'false',
+          'unused_local_variable': 'error'
+        };
+        var errorConfig = new ErrorConfig(options);
+        expect(errorConfig.processors, hasLength(2));
+
+        // ignore
+        var missingReturnProcessor = errorConfig.processors
+            .firstWhere((p) => p.appliesTo(missing_return));
+        expect(missingReturnProcessor.severity, isNull);
+
+        // error
+        var unusedLocalProcessor = errorConfig.processors
+            .firstWhere((p) => p.appliesTo(unused_local_variable));
+        expect(unusedLocalProcessor.severity, ErrorSeverity.ERROR);
+
+        // skip
+        var invalidAssignmentProcessor = errorConfig.processors.firstWhere(
+            (p) => p.appliesTo(invalid_assignment),
+            orElse: () => null);
+        expect(invalidAssignmentProcessor, isNull);
+      });
+    });
+  });
+}
+
+TestContext context;
+
+AnalysisOptionsProvider optionsProvider = new AnalysisOptionsProvider();
+ErrorProcessor processor;
+
+void configureOptions(String options) {
+  Map<String, YamlNode> optionMap =
+      optionsProvider.getOptionsFromString(options);
+  configureContextOptions(context, optionMap);
+}
+
+ErrorProcessor getProcessor(AnalysisError error) =>
+    ErrorProcessor.getProcessor(context, error);
+
+void oneTimeSetup() {
+  List<Plugin> plugins = <Plugin>[];
+  plugins.addAll(AnalysisEngine.instance.requiredPlugins);
+  plugins.add(AnalysisEngine.instance.commandLinePlugin);
+  plugins.add(AnalysisEngine.instance.optionsPlugin);
+  ExtensionManager manager = new ExtensionManager();
+  manager.processPlugins(plugins);
+}
+
+class TestContext extends AnalysisContextImpl {}