import { tryInvoke } from '..';
import { moduleFor, AbstractTestCase as TestCase } from 'internal-test-helpers';

let obj;

moduleFor(
  'Ember.tryInvoke',
  class extends TestCase {
    constructor() {
      super();

      obj = {
        aMethodThatExists() {
          return true;
        },
        aMethodThatTakesArguments(arg1, arg2) {
          return arg1 === arg2;
        },
      };
    }

    teardown() {
      obj = undefined;
    }

    ["@test should return undefined when the object doesn't exist"](assert) {
      assert.equal(tryInvoke(undefined, 'aMethodThatDoesNotExist'), undefined);
    }

    ["@test should return undefined when asked to perform a method that doesn't exist on the object"](
      assert
    ) {
      assert.equal(tryInvoke(obj, 'aMethodThatDoesNotExist'), undefined);
    }

    ['@test should return what the method returns when asked to perform a method that exists on the object'](
      assert
    ) {
      assert.equal(tryInvoke(obj, 'aMethodThatExists'), true);
    }

    ['@test should return what the method returns when asked to perform a method that takes arguments and exists on the object'](
      assert
    ) {
      assert.equal(tryInvoke(obj, 'aMethodThatTakesArguments', [true, true]), true);
    }
  }
);