/
EventPluginRegistry-test.internal.js
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EventPluginRegistry-test.internal.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @emails react-core
*/
'use strict';
describe('EventPluginRegistry', () => {
let EventPluginRegistry;
let createPlugin;
beforeEach(() => {
jest.resetModuleRegistry();
// These tests are intentionally testing the private injection interface.
// The public API surface of this is covered by other tests so
// if `EventPluginRegistry` is ever deleted, these tests should be
// safe to remove too.
EventPluginRegistry = require('events/EventPluginRegistry');
createPlugin = function(properties) {
return Object.assign({extractEvents: function() {}}, properties);
};
});
it('should be able to inject ordering before plugins', () => {
const OnePlugin = createPlugin();
const TwoPlugin = createPlugin();
const ThreePlugin = createPlugin();
EventPluginRegistry.injectEventPluginOrder(['one', 'two', 'three']);
EventPluginRegistry.injectEventPluginsByName({
one: OnePlugin,
two: TwoPlugin,
});
EventPluginRegistry.injectEventPluginsByName({
three: ThreePlugin,
});
expect(EventPluginRegistry.plugins.length).toBe(3);
expect(EventPluginRegistry.plugins[0]).toBe(OnePlugin);
expect(EventPluginRegistry.plugins[1]).toBe(TwoPlugin);
expect(EventPluginRegistry.plugins[2]).toBe(ThreePlugin);
});
it('should be able to inject plugins before and after ordering', () => {
const OnePlugin = createPlugin();
const TwoPlugin = createPlugin();
const ThreePlugin = createPlugin();
EventPluginRegistry.injectEventPluginsByName({
one: OnePlugin,
two: TwoPlugin,
});
EventPluginRegistry.injectEventPluginOrder(['one', 'two', 'three']);
EventPluginRegistry.injectEventPluginsByName({
three: ThreePlugin,
});
expect(EventPluginRegistry.plugins.length).toBe(3);
expect(EventPluginRegistry.plugins[0]).toBe(OnePlugin);
expect(EventPluginRegistry.plugins[1]).toBe(TwoPlugin);
expect(EventPluginRegistry.plugins[2]).toBe(ThreePlugin);
});
it('should be able to inject repeated plugins and out-of-order', () => {
const OnePlugin = createPlugin();
const TwoPlugin = createPlugin();
const ThreePlugin = createPlugin();
EventPluginRegistry.injectEventPluginsByName({
one: OnePlugin,
three: ThreePlugin,
});
EventPluginRegistry.injectEventPluginOrder(['one', 'two', 'three']);
EventPluginRegistry.injectEventPluginsByName({
two: TwoPlugin,
three: ThreePlugin,
});
expect(EventPluginRegistry.plugins.length).toBe(3);
expect(EventPluginRegistry.plugins[0]).toBe(OnePlugin);
expect(EventPluginRegistry.plugins[1]).toBe(TwoPlugin);
expect(EventPluginRegistry.plugins[2]).toBe(ThreePlugin);
});
it('should throw if plugin does not implement `extractEvents`', () => {
const BadPlugin = {};
EventPluginRegistry.injectEventPluginOrder(['bad']);
expect(function() {
EventPluginRegistry.injectEventPluginsByName({
bad: BadPlugin,
});
}).toThrowError(
'EventPluginRegistry: Event plugins must implement an `extractEvents` ' +
'method, but `bad` does not.',
);
});
it('should throw if plugin does not exist in ordering', () => {
const OnePlugin = createPlugin();
const RandomPlugin = createPlugin();
EventPluginRegistry.injectEventPluginOrder(['one']);
expect(function() {
EventPluginRegistry.injectEventPluginsByName({
one: OnePlugin,
random: RandomPlugin,
});
}).toThrowError(
'EventPluginRegistry: Cannot inject event plugins that do not exist ' +
'in the plugin ordering, `random`.',
);
});
it('should throw if ordering is injected more than once', () => {
const pluginOrdering = [];
EventPluginRegistry.injectEventPluginOrder(pluginOrdering);
expect(function() {
EventPluginRegistry.injectEventPluginOrder(pluginOrdering);
}).toThrowError(
'EventPluginRegistry: Cannot inject event plugin ordering more than ' +
'once. You are likely trying to load more than one copy of React.',
);
});
it('should throw if different plugins injected using same name', () => {
const OnePlugin = createPlugin();
const TwoPlugin = createPlugin();
EventPluginRegistry.injectEventPluginsByName({same: OnePlugin});
expect(function() {
EventPluginRegistry.injectEventPluginsByName({same: TwoPlugin});
}).toThrowError(
'EventPluginRegistry: Cannot inject two different event plugins using ' +
'the same name, `same`.',
);
});
it('should publish registration names of injected plugins', () => {
const OnePlugin = createPlugin({
eventTypes: {
click: {registrationName: 'onClick'},
focus: {registrationName: 'onFocus'},
},
});
const TwoPlugin = createPlugin({
eventTypes: {
magic: {
phasedRegistrationNames: {
bubbled: 'onMagicBubble',
captured: 'onMagicCapture',
},
},
},
});
EventPluginRegistry.injectEventPluginsByName({one: OnePlugin});
EventPluginRegistry.injectEventPluginOrder(['one', 'two']);
expect(
Object.keys(EventPluginRegistry.registrationNameModules).length,
).toBe(2);
expect(EventPluginRegistry.registrationNameModules.onClick).toBe(OnePlugin);
expect(EventPluginRegistry.registrationNameModules.onFocus).toBe(OnePlugin);
EventPluginRegistry.injectEventPluginsByName({two: TwoPlugin});
expect(
Object.keys(EventPluginRegistry.registrationNameModules).length,
).toBe(4);
expect(EventPluginRegistry.registrationNameModules.onMagicBubble).toBe(
TwoPlugin,
);
expect(EventPluginRegistry.registrationNameModules.onMagicCapture).toBe(
TwoPlugin,
);
});
it('should throw if multiple registration names collide', () => {
const OnePlugin = createPlugin({
eventTypes: {
photoCapture: {registrationName: 'onPhotoCapture'},
},
});
const TwoPlugin = createPlugin({
eventTypes: {
photo: {
phasedRegistrationNames: {
bubbled: 'onPhotoBubble',
captured: 'onPhotoCapture',
},
},
},
});
EventPluginRegistry.injectEventPluginsByName({
one: OnePlugin,
two: TwoPlugin,
});
expect(function() {
EventPluginRegistry.injectEventPluginOrder(['one', 'two']);
}).toThrowError(
'EventPluginHub: More than one plugin attempted to publish the same ' +
'registration name, `onPhotoCapture`.',
);
});
it('should throw if an invalid event is published', () => {
const OnePlugin = createPlugin({
eventTypes: {
badEvent: {
/* missing configuration */
},
},
});
EventPluginRegistry.injectEventPluginsByName({one: OnePlugin});
expect(function() {
EventPluginRegistry.injectEventPluginOrder(['one']);
}).toThrowError(
'EventPluginRegistry: Failed to publish event `badEvent` for plugin ' +
'`one`.',
);
});
});