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<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
<meta charset="utf-8">
<title>gr-api-interface</title>

<script src="../../../node_modules/@webcomponents/webcomponentsjs/webcomponents-bundle.js"></script>
<script src="/components/wct-browser-legacy/browser.js"></script>

<test-fixture id="basic">
  <template>
    <gr-js-api-interface></gr-js-api-interface>
  </template>
</test-fixture>

<script type="module">
import '../../../test/common-test-setup.js';
import '../gr-js-api-interface/gr-js-api-interface.js';
import {EventEmitter} from './gr-event-interface.js';
import {_testOnly_initGerritPluginApi} from '../gr-js-api-interface/gr-gerrit.js';

const pluginApi = _testOnly_initGerritPluginApi();

suite('gr-event-interface tests', () => {
  let sandbox;

  setup(() => {
    sandbox = sinon.sandbox.create();
  });

  teardown(() => {
    sandbox.restore();
  });

  suite('test on Gerrit', () => {
    setup(() => {
      fixture('basic');
      pluginApi.removeAllListeners();
    });

    test('communicate between plugin and Gerrit', done => {
      const eventName = 'test-plugin-event';
      let p;
      pluginApi.on(eventName, e => {
        assert.equal(e.value, 'test');
        assert.equal(e.plugin, p);
        done();
      });
      pluginApi.install(plugin => {
        p = plugin;
        pluginApi.emit(eventName, {value: 'test', plugin});
      }, '0.1',
      'http://test.com/plugins/testplugin/static/test.js');
    });

    test('listen on events from core', done => {
      const eventName = 'test-plugin-event';
      pluginApi.on(eventName, e => {
        assert.equal(e.value, 'test');
        done();
      });

      pluginApi.emit(eventName, {value: 'test'});
    });

    test('communicate across plugins', done => {
      const eventName = 'test-plugin-event';
      pluginApi.install(plugin => {
        pluginApi.on(eventName, e => {
          assert.equal(e.plugin.getPluginName(), 'testB');
          done();
        });
      }, '0.1',
      'http://test.com/plugins/testA/static/testA.js');

      pluginApi.install(plugin => {
        pluginApi.emit(eventName, {plugin});
      }, '0.1',
      'http://test.com/plugins/testB/static/testB.js');
    });
  });

  suite('test on interfaces', () => {
    let testObj;

    class TestClass extends EventEmitter {
    }

    setup(() => {
      testObj = new TestClass();
    });

    test('on', () => {
      const cbStub = sinon.stub();
      testObj.on('test', cbStub);
      testObj.emit('test');
      testObj.emit('test');
      assert.isTrue(cbStub.calledTwice);
    });

    test('once', () => {
      const cbStub = sinon.stub();
      testObj.once('test', cbStub);
      testObj.emit('test');
      testObj.emit('test');
      assert.isTrue(cbStub.calledOnce);
    });

    test('unsubscribe', () => {
      const cbStub = sinon.stub();
      const unsubscribe = testObj.on('test', cbStub);
      testObj.emit('test');
      unsubscribe();
      testObj.emit('test');
      assert.isTrue(cbStub.calledOnce);
    });

    test('off', () => {
      const cbStub = sinon.stub();
      testObj.on('test', cbStub);
      testObj.emit('test');
      testObj.off('test', cbStub);
      testObj.emit('test');
      assert.isTrue(cbStub.calledOnce);
    });

    test('removeAllListeners', () => {
      const cbStub = sinon.stub();
      testObj.on('test', cbStub);
      testObj.removeAllListeners('test');
      testObj.emit('test');
      assert.isTrue(cbStub.notCalled);
    });
  });
});
</script>