import { RenderingTest, moduleFor } from '../../utils/test-case';
import { set } from 'ember-metal';

moduleFor(
  'Helpers test: {{concat}}',
  class extends RenderingTest {
    ['@test it concats static arguments']() {
      this.render(`{{concat "foo" " " "bar" " " "baz"}}`);
      this.assertText('foo bar baz');
    }

    ['@test it updates for bound arguments']() {
      this.render(`{{concat model.first model.second}}`, {
        model: { first: 'one', second: 'two' },
      });

      this.assertText('onetwo');

      this.runTask(() => this.rerender());

      this.assertText('onetwo');

      this.runTask(() => set(this.context, 'model.first', 'three'));

      this.assertText('threetwo');

      this.runTask(() => set(this.context, 'model.second', 'four'));

      this.assertText('threefour');

      this.runTask(() => set(this.context, 'model', { first: 'one', second: 'two' }));

      this.assertText('onetwo');
    }

    ['@test it can be used as a sub-expression']() {
      this.render(
        `{{concat (concat model.first model.second) (concat model.third model.fourth)}}`,
        {
          model: {
            first: 'one',
            second: 'two',
            third: 'three',
            fourth: 'four',
          },
        }
      );

      this.assertText('onetwothreefour');

      this.runTask(() => this.rerender());

      this.assertText('onetwothreefour');

      this.runTask(() => set(this.context, 'model.first', 'five'));

      this.assertText('fivetwothreefour');

      this.runTask(() => {
        set(this.context, 'model.second', 'six');
        set(this.context, 'model.third', 'seven');
      });

      this.assertText('fivesixsevenfour');

      this.runTask(() => {
        set(this.context, 'model', {
          first: 'one',
          second: 'two',
          third: 'three',
          fourth: 'four',
        });
      });

      this.assertText('onetwothreefour');
    }

    ['@test it can be used as input for other helpers']() {
      this.registerHelper('x-eq', ([actual, expected]) => actual === expected);

      this.render(
        `{{#if (x-eq (concat model.first model.second) "onetwo")}}Truthy!{{else}}False{{/if}}`,
        {
          model: {
            first: 'one',
            second: 'two',
          },
        }
      );

      this.assertText('Truthy!');

      this.runTask(() => this.rerender());

      this.assertText('Truthy!');

      this.runTask(() => set(this.context, 'model.first', 'three'));

      this.assertText('False');

      this.runTask(() => set(this.context, 'model', { first: 'one', second: 'two' }));

      this.assertText('Truthy!');
    }
  }
);