polygerrit-ui/app/elements/shared/gr-lib-loader/gr-lib-loader_test.html - gerrit - Git at Google

 <!DOCTYPE html>
 <!--
 @license
 Copyright (C) 2016 The Android Open Source Project

 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.
 -->

 <meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
 <title>gr-lib-loader</title>

 <script src="/bower_components/webcomponentsjs/custom-elements-es5-adapter.js"></script>

 <script src="/bower_components/webcomponentsjs/webcomponents-lite.js"></script>
 <script src="/bower_components/web-component-tester/browser.js"></script>
 <link rel="import" href="../../../test/common-test-setup.html"/>
 <link rel="import" href="gr-lib-loader.html">

 <script>void(0);</script>

 <test-fixture id="basic">
   <template>
     <gr-lib-loader></gr-lib-loader>
   </template>
 </test-fixture>

 <script>
   suite('gr-lib-loader tests', () => {
     let sandbox;
     let element;
     let resolveLoad;
     let loadStub;

     setup(() => {
       sandbox = sinon.sandbox.create();
       element = fixture('basic');

       loadStub = sandbox.stub(element, '_loadScript', () =>
         new Promise(resolve => resolveLoad = resolve)
       );

       // Assert preconditions:
       assert.isFalse(element._hljsState.loading);
     });

     teardown(() => {
       if (window.hljs) {
         delete window.hljs;
       }
       sandbox.restore();

       // Because the element state is a singleton, clean it up.
       element._hljsState.configured = false;
       element._hljsState.loading = false;
       element._hljsState.callbacks = [];
     });

     test('only load once', done => {
       sandbox.stub(element, '_getHLJSUrl').returns('');
       const firstCallHandler = sinon.stub();
       element.getHLJS().then(firstCallHandler);

       // It should now be in the loading state.
       assert.isTrue(loadStub.called);
       assert.isTrue(element._hljsState.loading);
       assert.isFalse(firstCallHandler.called);

       const secondCallHandler = sinon.stub();
       element.getHLJS().then(secondCallHandler);

       // No change in state.
       assert.isTrue(element._hljsState.loading);
       assert.isFalse(firstCallHandler.called);
       assert.isFalse(secondCallHandler.called);

       // Now load the library.
       resolveLoad();
       flush(() => {
         // The state should be loaded and both handlers called.
         assert.isFalse(element._hljsState.loading);
         assert.isTrue(firstCallHandler.called);
         assert.isTrue(secondCallHandler.called);
         done();
       });
     });

     suite('preloaded', () => {
       let hljsStub;

       setup(() => {
         hljsStub = {
           configure: sinon.stub(),
         };
         window.hljs = hljsStub;
       });

       teardown(() => {
         delete window.hljs;
       });

       test('returns hljs', done => {
         const firstCallHandler = sinon.stub();
         element.getHLJS().then(firstCallHandler);
         flush(() => {
           assert.isTrue(firstCallHandler.called);
           assert.isTrue(firstCallHandler.calledWith(hljsStub));
           done();
         });
       });

       test('configures hljs', done => {
         element.getHLJS().then(() => {
           assert.isTrue(window.hljs.configure.calledOnce);
           done();
         });
       });
     });

     suite('_getHLJSUrl', () => {
       suite('checking _getLibRoot', () => {
         let root;

         setup(() => {
           sandbox.stub(element, '_getLibRoot', () => root);
         });

         test('with no root', () => {
           assert.isNull(element._getHLJSUrl());
         });

         test('with root', () => {
           root = 'test-root.com/';
           assert.equal(element._getHLJSUrl(),
               'test-root.com/bower_components/highlightjs/highlight.min.js');
         });
       });
     });
   });
 </script>
	<!DOCTYPE html>
	<!--
	@license
	Copyright (C) 2016 The Android Open Source Project

	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.
	-->

	<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
	<title>gr-lib-loader</title>

	<script src="/bower_components/webcomponentsjs/custom-elements-es5-adapter.js"></script>

	<script src="/bower_components/webcomponentsjs/webcomponents-lite.js"></script>
	<script src="/bower_components/web-component-tester/browser.js"></script>
	<link rel="import" href="../../../test/common-test-setup.html"/>
	<link rel="import" href="gr-lib-loader.html">

	<script>void(0);</script>

	<test-fixture id="basic">
	<template>
	<gr-lib-loader></gr-lib-loader>
	</template>
	</test-fixture>

	<script>
	suite('gr-lib-loader tests', () => {
	let sandbox;
	let element;
	let resolveLoad;
	let loadStub;

	setup(() => {
	sandbox = sinon.sandbox.create();
	element = fixture('basic');

	loadStub = sandbox.stub(element, '_loadScript', () =>
	new Promise(resolve => resolveLoad = resolve)
	);

	// Assert preconditions:
	assert.isFalse(element._hljsState.loading);
	});

	teardown(() => {
	if (window.hljs) {
	delete window.hljs;
	}
	sandbox.restore();

	// Because the element state is a singleton, clean it up.
	element._hljsState.configured = false;
	element._hljsState.loading = false;
	element._hljsState.callbacks = [];
	});

	test('only load once', done => {
	sandbox.stub(element, '_getHLJSUrl').returns('');
	const firstCallHandler = sinon.stub();
	element.getHLJS().then(firstCallHandler);

	// It should now be in the loading state.
	assert.isTrue(loadStub.called);
	assert.isTrue(element._hljsState.loading);
	assert.isFalse(firstCallHandler.called);

	const secondCallHandler = sinon.stub();
	element.getHLJS().then(secondCallHandler);

	// No change in state.
	assert.isTrue(element._hljsState.loading);
	assert.isFalse(firstCallHandler.called);
	assert.isFalse(secondCallHandler.called);

	// Now load the library.
	resolveLoad();
	flush(() => {
	// The state should be loaded and both handlers called.
	assert.isFalse(element._hljsState.loading);
	assert.isTrue(firstCallHandler.called);
	assert.isTrue(secondCallHandler.called);
	done();
	});
	});

	suite('preloaded', () => {
	let hljsStub;

	setup(() => {
	hljsStub = {
	configure: sinon.stub(),
	};
	window.hljs = hljsStub;
	});

	teardown(() => {
	delete window.hljs;
	});

	test('returns hljs', done => {
	const firstCallHandler = sinon.stub();
	element.getHLJS().then(firstCallHandler);
	flush(() => {
	assert.isTrue(firstCallHandler.called);
	assert.isTrue(firstCallHandler.calledWith(hljsStub));
	done();
	});
	});

	test('configures hljs', done => {
	element.getHLJS().then(() => {
	assert.isTrue(window.hljs.configure.calledOnce);
	done();
	});
	});
	});

	suite('_getHLJSUrl', () => {
	suite('checking _getLibRoot', () => {
	let root;

	setup(() => {
	sandbox.stub(element, '_getLibRoot', () => root);
	});

	test('with no root', () => {
	assert.isNull(element._getHLJSUrl());
	});

	test('with root', () => {
	root = 'test-root.com/';
	assert.equal(element._getHLJSUrl(),
	'test-root.com/bower_components/highlightjs/highlight.min.js');
	});
	});
	});
	});
	</script>