angular-cn/packages/zone.js/lib/mocha/mocha.ts

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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
'use strict';
Zone.__load_patch('mocha', (global: any, Zone: ZoneType) => {
const Mocha = global.Mocha;
if (typeof Mocha === 'undefined') {
// return if Mocha is not available, because now zone-testing
// will load mocha patch with jasmine/jest patch
return;
}
if (typeof Zone === 'undefined') {
throw new Error('Missing Zone.js');
}
const ProxyZoneSpec = (Zone as any)['ProxyZoneSpec'];
const SyncTestZoneSpec = (Zone as any)['SyncTestZoneSpec'];
if (!ProxyZoneSpec) {
throw new Error('Missing ProxyZoneSpec');
}
if (Mocha['__zone_patch__']) {
throw new Error('"Mocha" has already been patched with "Zone".');
}
Mocha['__zone_patch__'] = true;
const rootZone = Zone.current;
const syncZone = rootZone.fork(new SyncTestZoneSpec('Mocha.describe'));
let testZone: Zone|null = null;
const suiteZone = rootZone.fork(new ProxyZoneSpec());
const mochaOriginal = {
after: Mocha.after,
afterEach: Mocha.afterEach,
before: Mocha.before,
beforeEach: Mocha.beforeEach,
describe: Mocha.describe,
it: Mocha.it
};
function modifyArguments(args: IArguments, syncTest: Function, asyncTest?: Function): any[] {
for (let i = 0; i < args.length; i++) {
let arg = args[i];
if (typeof arg === 'function') {
// The `done` callback is only passed through if the function expects at
// least one argument.
// Note we have to make a function with correct number of arguments,
// otherwise mocha will
// think that all functions are sync or async.
args[i] = (arg.length === 0) ? syncTest(arg) : asyncTest !(arg);
// Mocha uses toString to view the test body in the result list, make sure we return the
// correct function body
args[i].toString = function() { return arg.toString(); };
}
}
return args as any;
}
function wrapDescribeInZone(args: IArguments): any[] {
const syncTest: any = function(fn: Function) {
return function(this: unknown) { return syncZone.run(fn, this, arguments as any as any[]); };
};
return modifyArguments(args, syncTest);
}
function wrapTestInZone(args: IArguments): any[] {
const asyncTest = function(fn: Function) {
return function(this: unknown, done: Function) { return testZone !.run(fn, this, [done]); };
};
const syncTest: any = function(fn: Function) {
return function(this: unknown) { return testZone !.run(fn, this); };
};
return modifyArguments(args, syncTest, asyncTest);
}
function wrapSuiteInZone(args: IArguments): any[] {
const asyncTest = function(fn: Function) {
return function(this: unknown, done: Function) { return suiteZone.run(fn, this, [done]); };
};
const syncTest: any = function(fn: Function) {
return function(this: unknown) { return suiteZone.run(fn, this); };
};
return modifyArguments(args, syncTest, asyncTest);
}
global.describe = global.suite = Mocha.describe = function() {
return mochaOriginal.describe.apply(this, wrapDescribeInZone(arguments));
};
global.xdescribe = global.suite.skip = Mocha.describe.skip = function() {
return mochaOriginal.describe.skip.apply(this, wrapDescribeInZone(arguments));
};
global.describe.only = global.suite.only = Mocha.describe.only = function() {
return mochaOriginal.describe.only.apply(this, wrapDescribeInZone(arguments));
};
global.it = global.specify = global.test =
Mocha.it = function() { return mochaOriginal.it.apply(this, wrapTestInZone(arguments)); };
global.xit = global.xspecify = Mocha.it.skip = function() {
return mochaOriginal.it.skip.apply(this, wrapTestInZone(arguments));
};
global.it.only = global.test.only = Mocha.it.only = function() {
return mochaOriginal.it.only.apply(this, wrapTestInZone(arguments));
};
global.after = global.suiteTeardown = Mocha.after = function() {
return mochaOriginal.after.apply(this, wrapSuiteInZone(arguments));
};
global.afterEach = global.teardown = Mocha.afterEach = function() {
return mochaOriginal.afterEach.apply(this, wrapTestInZone(arguments));
};
global.before = global.suiteSetup = Mocha.before = function() {
return mochaOriginal.before.apply(this, wrapSuiteInZone(arguments));
};
global.beforeEach = global.setup = Mocha.beforeEach = function() {
return mochaOriginal.beforeEach.apply(this, wrapTestInZone(arguments));
};
((originalRunTest, originalRun) => {
Mocha.Runner.prototype.runTest = function(fn: Function) {
Zone.current.scheduleMicroTask('mocha.forceTask', () => { originalRunTest.call(this, fn); });
};
Mocha.Runner.prototype.run = function(fn: Function) {
this.on('test', (e: any) => { testZone = rootZone.fork(new ProxyZoneSpec()); });
this.on('fail', (test: any, err: any) => {
const proxyZoneSpec = testZone && testZone.get('ProxyZoneSpec');
if (proxyZoneSpec && err) {
try {
// try catch here in case err.message is not writable
err.message += proxyZoneSpec.getAndClearPendingTasksInfo();
} catch (error) {
}
}
});
return originalRun.call(this, fn);
};
})(Mocha.Runner.prototype.runTest, Mocha.Runner.prototype.run);
});