Replace isAppropriateFor with suitabilityFor and start using it

pkg/analyzer/test/src/task/model_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.src.task.model_test;
 
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/task/model.dart';
 import 'package:analyzer/task/model.dart';
@@ skipping 96 matching lines @@
     String name = 'name';
     BuildTask buildTask = (context, target) {};
     CreateTaskInputs createTaskInputs = (target) {};
     List<ResultDescriptor> results = <ResultDescriptor>[];
     TaskDescriptorImpl descriptor =
         new TaskDescriptorImpl(name, buildTask, createTaskInputs, results);
     expect(descriptor, isNotNull);
     expect(descriptor.name, name);
     expect(descriptor.buildTask, equals(buildTask));
     expect(descriptor.createTaskInputs, equals(createTaskInputs));
-    expect(descriptor.isAppropriateFor(null), isTrue);
+    expect(descriptor.suitabilityFor(null), TaskSuitability.LOWEST);
     expect(descriptor.results, results);
   }
 
   test_create_withIsAppropriateFor() {
     String name = 'name';
     BuildTask buildTask = (context, target) {};
     CreateTaskInputs createTaskInputs = (target) {};
     List<ResultDescriptor> results = <ResultDescriptor>[];
-    IsAppropriateFor isAppropriateFor = (target) => false;
+    SuitabilityFor suitabilityFor = (target) => TaskSuitability.NONE;
     TaskDescriptorImpl descriptor = new TaskDescriptorImpl(
         name, buildTask, createTaskInputs, results,
-        isAppropriateFor: isAppropriateFor);
+        suitabilityFor: suitabilityFor);
     expect(descriptor, isNotNull);
     expect(descriptor.name, name);
     expect(descriptor.buildTask, equals(buildTask));
     expect(descriptor.createTaskInputs, equals(createTaskInputs));
-    expect(descriptor.isAppropriateFor(null), isFalse);
+    expect(descriptor.suitabilityFor(null), TaskSuitability.NONE);
     expect(descriptor.results, results);
   }
 
   test_createTask() {
     BuildTask buildTask =
         (context, target) => new TestAnalysisTask(context, target);
     CreateTaskInputs createTaskInputs = (target) {};
     List<ResultDescriptor> results = <ResultDescriptor>[];
     TaskDescriptorImpl descriptor =
         new TaskDescriptorImpl('name', buildTask, createTaskInputs, results);
     AnalysisContext context = null;
     AnalysisTarget target = new TestSource();
     Map<String, dynamic> inputs = {};
     AnalysisTask createTask = descriptor.createTask(context, target, inputs);
     expect(createTask, isNotNull);
     expect(createTask.context, context);
     expect(createTask.inputs, inputs);
     expect(createTask.target, target);
   }
 }