// Copyright 2008 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

goog.provide('goog.proto2.DescriptorTest');
goog.setTestOnly('goog.proto2.DescriptorTest');

goog.require('goog.proto2.Descriptor');
goog.require('goog.proto2.Message');
goog.require('goog.testing.jsunit');

function testDescriptorConstruction() {
  var messageType = function() {};
  var descriptor = new goog.proto2.Descriptor(
      messageType, {name: 'test', fullName: 'this.is.a.test'}, []);

  assertEquals('test', descriptor.getName());
  assertEquals('this.is.a.test', descriptor.getFullName());
  assertEquals(null, descriptor.getContainingType());
}

function testParentDescriptor() {
  var parentType = function() {};
  var messageType = function() {};

  var parentDescriptor = new goog.proto2.Descriptor(
      parentType, {name: 'parent', fullName: 'this.is.a.parent'}, []);

  parentType.getDescriptor = function() { return parentDescriptor; };

  var descriptor = new goog.proto2.Descriptor(
      messageType,
      {name: 'test', fullName: 'this.is.a.test', containingType: parentType},
      []);

  assertEquals(parentDescriptor, descriptor.getContainingType());
}

function testStaticGetDescriptorCachesResults() {
  var messageType = function() {};

  // This method would be provided by proto_library() BUILD rule.
  messageType.prototype.getDescriptor = function() {
    if (!messageType.descriptor_) {
      // The descriptor is created lazily when we instantiate a new instance.
      var descriptorObj = {0: {name: 'test', fullName: 'this.is.a.test'}};
      messageType.descriptor_ =
          goog.proto2.Message.createDescriptor(messageType, descriptorObj);
    }
    return messageType.descriptor_;
  };
  messageType.getDescriptor = messageType.prototype.getDescriptor;

  var descriptor = messageType.getDescriptor();
  assertEquals(descriptor, messageType.getDescriptor());  // same instance
}