/*****************************************************************************
 * Open MCT, Copyright (c) 2014-2024, United States Government
 * as represented by the Administrator of the National Aeronautics and Space
 * Administration. All rights reserved.
 *
 * Open MCT is 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.
 *
 * Open MCT includes source code licensed under additional open source
 * licenses. See the Open Source Licenses file (LICENSES.md) included with
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 *****************************************************************************/

import EvaluatorPool from './EvaluatorPool.js';

describe('EvaluatorPool', function () {
  let pool;
  let openmct;
  let objectA;
  let objectB;

  beforeEach(function () {
    openmct = {
      composition: jasmine.createSpyObj('compositionAPI', ['get']),
      objects: jasmine.createSpyObj('objectAPI', ['observe'])
    };
    openmct.composition.get.and.callFake(function () {
      const compositionCollection = jasmine.createSpyObj('compositionCollection', [
        'load',
        'on',
        'off'
      ]);
      compositionCollection.load.and.returnValue(Promise.resolve());

      return compositionCollection;
    });
    openmct.objects.observe.and.callFake(function () {
      return function () {};
    });
    pool = new EvaluatorPool(openmct);
    objectA = {
      identifier: {
        namespace: 'someNamespace',
        key: 'someKey'
      },
      configuration: {
        ruleOrder: []
      }
    };
    objectB = {
      identifier: {
        namespace: 'otherNamespace',
        key: 'otherKey'
      },
      configuration: {
        ruleOrder: []
      }
    };
  });

  it('returns new evaluators for different objects', function () {
    const evaluatorA = pool.get(objectA);
    const evaluatorB = pool.get(objectB);
    expect(evaluatorA).not.toBe(evaluatorB);
  });

  it('returns the same evaluator for the same object', function () {
    const evaluatorA = pool.get(objectA);
    const evaluatorB = pool.get(objectA);
    expect(evaluatorA).toBe(evaluatorB);

    const evaluatorC = pool.get(JSON.parse(JSON.stringify(objectA)));
    expect(evaluatorA).toBe(evaluatorC);
  });

  it('returns new evaluator when old is released', function () {
    const evaluatorA = pool.get(objectA);
    const evaluatorB = pool.get(objectA);
    expect(evaluatorA).toBe(evaluatorB);
    pool.release(evaluatorA);
    pool.release(evaluatorB);
    const evaluatorC = pool.get(objectA);
    expect(evaluatorA).not.toBe(evaluatorC);
  });
});
