/**
 * @license
 * Visual Blocks Editor
 *
 * Copyright 2018 Google Inc.
 * https://developers.google.com/blockly/
 *
 * 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.
 */

/**
 * @fileoverview Tests for variable utility functions in Blockly
 * @author fenichel@google.com (Rachel Fenichel)
 */
'use strict';

goog.require('goog.testing');

function variablesTest_setUp() {
  defineGetVarBlock();
  var workspace = new Blockly.Workspace();
  workspace.createVariable('foo', 'type1', '1');
  workspace.createVariable('bar', 'type1', '2');
  workspace.createVariable('baz', 'type1', '3');
  return workspace;
}

function variablesTest_tearDown(workspace) {
  undefineGetVarBlock();
  workspace.dispose();
}

function buildVariablesTest(testImpl) {
  return function() {
    var workspace = variablesTest_setUp();
    try {
      testImpl(workspace);
    } finally {
      variablesTest_tearDown(workspace);
    }
  };
}

var test_allUsedVarModels = buildVariablesTest(
    function(workspace) {
      createMockVarBlock(workspace, '1');
      createMockVarBlock(workspace, '2');
      createMockVarBlock(workspace, '3');

      var result = Blockly.Variables.allUsedVarModels(workspace);
      assertEquals('Expected three variables in the list of used variables',
          3, result.length);
    }
);

var test_allUsedVarModels_someUnused = buildVariablesTest(
    function(workspace) {
      createMockVarBlock(workspace, '2');

      var result = Blockly.Variables.allUsedVarModels(workspace);
      assertEquals('Expected one variable in the list of used variables',
          1, result.length);
      assertEquals('Expected variable with ID 2 in the list of used variables',
          '2', result[0].getId());
    }
);

var test_allUsedVarModels_varUsedTwice = buildVariablesTest(
    function(workspace) {
      createMockVarBlock(workspace, '2');
      createMockVarBlock(workspace, '2');

      var result = Blockly.Variables.allUsedVarModels(workspace);
      // Using the same variable multiple times should not change the number of
      // elements in the list.
      assertEquals('Expected one variable in the list of used variables',
          1, result.length);
      assertEquals('Expected variable with ID 2 in the list of used variables',
          '2', result[0].getId());
    }
);

var test_allUsedVarModels_allUnused = buildVariablesTest(
    function(workspace) {
      var result = Blockly.Variables.allUsedVarModels(workspace);
      assertEquals('Expected no variables in the list of used variables',
          0, result.length);
    }
);