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267 lines
10 KiB
267 lines
10 KiB
/** |
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved. |
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* |
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* This source code is licensed under the MIT license found in the |
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* LICENSE file in the root directory of this source tree. |
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*/ |
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/// <reference types="node" /> |
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import type { Context } from 'vm'; |
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import type { LegacyFakeTimers, ModernFakeTimers } from '@jest/fake-timers'; |
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import type { Circus, Config, Global } from '@jest/types'; |
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import type { fn as JestMockFn, mocked as JestMockMocked, spyOn as JestMockSpyOn, ModuleMocker } from 'jest-mock'; |
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export declare type EnvironmentContext = { |
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console: Console; |
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docblockPragmas: Record<string, string | Array<string>>; |
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testPath: Config.Path; |
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}; |
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export declare type ModuleWrapper = (this: Module['exports'], module: Module, exports: Module['exports'], require: Module['require'], __dirname: string, __filename: Module['filename'], jest?: Jest, ...extraGlobals: Array<Global.Global[keyof Global.Global]>) => unknown; |
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export declare class JestEnvironment<Timer = unknown> { |
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constructor(config: Config.ProjectConfig, context?: EnvironmentContext); |
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global: Global.Global; |
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fakeTimers: LegacyFakeTimers<Timer> | null; |
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fakeTimersModern: ModernFakeTimers | null; |
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moduleMocker: ModuleMocker | null; |
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getVmContext(): Context | null; |
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setup(): Promise<void>; |
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teardown(): Promise<void>; |
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handleTestEvent?: Circus.EventHandler; |
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exportConditions?: () => Array<string>; |
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} |
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export declare type Module = NodeModule; |
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export interface Jest { |
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/** |
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* Advances all timers by the needed milliseconds so that only the next timeouts/intervals will run. |
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* Optionally, you can provide steps, so it will run steps amount of next timeouts/intervals. |
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*/ |
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advanceTimersToNextTimer(steps?: number): void; |
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/** |
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* Disables automatic mocking in the module loader. |
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*/ |
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autoMockOff(): Jest; |
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/** |
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* Enables automatic mocking in the module loader. |
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*/ |
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autoMockOn(): Jest; |
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/** |
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* Clears the mock.calls and mock.instances properties of all mocks. |
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* Equivalent to calling .mockClear() on every mocked function. |
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*/ |
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clearAllMocks(): Jest; |
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/** |
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* Removes any pending timers from the timer system. If any timers have been |
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* scheduled, they will be cleared and will never have the opportunity to |
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* execute in the future. |
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*/ |
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clearAllTimers(): void; |
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/** |
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* Indicates that the module system should never return a mocked version |
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* of the specified module, including all of the specified module's |
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* dependencies. |
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*/ |
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deepUnmock(moduleName: string): Jest; |
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/** |
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* Disables automatic mocking in the module loader. |
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* |
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* After this method is called, all `require()`s will return the real |
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* versions of each module (rather than a mocked version). |
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*/ |
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disableAutomock(): Jest; |
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/** |
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* When using `babel-jest`, calls to mock will automatically be hoisted to |
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* the top of the code block. Use this method if you want to explicitly avoid |
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* this behavior. |
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*/ |
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doMock(moduleName: string, moduleFactory?: () => unknown, options?: { |
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virtual?: boolean; |
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}): Jest; |
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/** |
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* Indicates that the module system should never return a mocked version |
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* of the specified module from require() (e.g. that it should always return |
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* the real module). |
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*/ |
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dontMock(moduleName: string): Jest; |
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/** |
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* Enables automatic mocking in the module loader. |
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*/ |
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enableAutomock(): Jest; |
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/** |
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* Creates a mock function. Optionally takes a mock implementation. |
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*/ |
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fn: typeof JestMockFn; |
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/** |
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* Given the name of a module, use the automatic mocking system to generate a |
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* mocked version of the module for you. |
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* |
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* This is useful when you want to create a manual mock that extends the |
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* automatic mock's behavior. |
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* |
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* @deprecated Use `jest.createMockFromModule()` instead |
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*/ |
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genMockFromModule(moduleName: string): unknown; |
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/** |
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* Given the name of a module, use the automatic mocking system to generate a |
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* mocked version of the module for you. |
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* |
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* This is useful when you want to create a manual mock that extends the |
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* automatic mock's behavior. |
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*/ |
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createMockFromModule(moduleName: string): unknown; |
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/** |
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* Determines if the given function is a mocked function. |
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*/ |
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isMockFunction(fn: (...args: Array<any>) => unknown): fn is ReturnType<typeof JestMockFn>; |
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/** |
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* Mocks a module with an auto-mocked version when it is being required. |
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*/ |
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mock(moduleName: string, moduleFactory?: () => unknown, options?: { |
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virtual?: boolean; |
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}): Jest; |
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/** |
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* Mocks a module with the provided module factory when it is being imported. |
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*/ |
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unstable_mockModule<T = unknown>(moduleName: string, moduleFactory: () => Promise<T> | T, options?: { |
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virtual?: boolean; |
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}): Jest; |
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/** |
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* Returns the actual module instead of a mock, bypassing all checks on |
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* whether the module should receive a mock implementation or not. |
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* |
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* @example |
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``` |
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jest.mock('../myModule', () => { |
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// Require the original module to not be mocked... |
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const originalModule = jest.requireActual(moduleName); |
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return { |
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__esModule: true, // Use it when dealing with esModules |
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...originalModule, |
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getRandom: jest.fn().mockReturnValue(10), |
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}; |
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}); |
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const getRandom = require('../myModule').getRandom; |
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getRandom(); // Always returns 10 |
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``` |
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*/ |
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requireActual: (moduleName: string) => unknown; |
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/** |
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* Returns a mock module instead of the actual module, bypassing all checks |
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* on whether the module should be required normally or not. |
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*/ |
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requireMock: (moduleName: string) => unknown; |
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/** |
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* Resets the state of all mocks. |
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* Equivalent to calling .mockReset() on every mocked function. |
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*/ |
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resetAllMocks(): Jest; |
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/** |
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* Resets the module registry - the cache of all required modules. This is |
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* useful to isolate modules where local state might conflict between tests. |
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*/ |
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resetModules(): Jest; |
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/** |
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* Restores all mocks back to their original value. Equivalent to calling |
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* `.mockRestore` on every mocked function. |
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* |
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* Beware that jest.restoreAllMocks() only works when the mock was created with |
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* jest.spyOn; other mocks will require you to manually restore them. |
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*/ |
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restoreAllMocks(): Jest; |
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mocked: typeof JestMockMocked; |
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/** |
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* Runs failed tests n-times until they pass or until the max number of |
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* retries is exhausted. This only works with `jest-circus`! |
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*/ |
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retryTimes(numRetries: number): Jest; |
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/** |
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* Exhausts tasks queued by setImmediate(). |
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* |
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* > Note: This function is not available when using Lolex as fake timers implementation |
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*/ |
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runAllImmediates(): void; |
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/** |
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* Exhausts the micro-task queue (usually interfaced in node via |
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* process.nextTick). |
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*/ |
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runAllTicks(): void; |
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/** |
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* Exhausts the macro-task queue (i.e., all tasks queued by setTimeout() |
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* and setInterval()). |
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*/ |
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runAllTimers(): void; |
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/** |
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* Executes only the macro-tasks that are currently pending (i.e., only the |
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* tasks that have been queued by setTimeout() or setInterval() up to this |
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* point). If any of the currently pending macro-tasks schedule new |
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* macro-tasks, those new tasks will not be executed by this call. |
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*/ |
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runOnlyPendingTimers(): void; |
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/** |
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* Advances all timers by msToRun milliseconds. All pending "macro-tasks" |
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* that have been queued via setTimeout() or setInterval(), and would be |
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* executed within this timeframe will be executed. |
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*/ |
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advanceTimersByTime(msToRun: number): void; |
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/** |
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* Returns the number of fake timers still left to run. |
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*/ |
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getTimerCount(): number; |
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/** |
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* Explicitly supplies the mock object that the module system should return |
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* for the specified module. |
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* |
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* Note It is recommended to use `jest.mock()` instead. The `jest.mock` |
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* API's second argument is a module factory instead of the expected |
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* exported module object. |
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*/ |
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setMock(moduleName: string, moduleExports: unknown): Jest; |
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/** |
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* Set the default timeout interval for tests and before/after hooks in |
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* milliseconds. |
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* |
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* Note: The default timeout interval is 5 seconds if this method is not |
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* called. |
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*/ |
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setTimeout(timeout: number): Jest; |
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/** |
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* Creates a mock function similar to `jest.fn` but also tracks calls to |
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* `object[methodName]`. |
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* |
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* Note: By default, jest.spyOn also calls the spied method. This is |
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* different behavior from most other test libraries. |
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*/ |
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spyOn: typeof JestMockSpyOn; |
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/** |
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* Indicates that the module system should never return a mocked version of |
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* the specified module from require() (e.g. that it should always return the |
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* real module). |
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*/ |
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unmock(moduleName: string): Jest; |
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/** |
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* Instructs Jest to use fake versions of the standard timer functions. |
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*/ |
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useFakeTimers(implementation?: 'modern' | 'legacy'): Jest; |
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/** |
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* Instructs Jest to use the real versions of the standard timer functions. |
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*/ |
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useRealTimers(): Jest; |
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/** |
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* `jest.isolateModules(fn)` goes a step further than `jest.resetModules()` |
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* and creates a sandbox registry for the modules that are loaded inside |
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* the callback function. This is useful to isolate specific modules for |
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* every test so that local module state doesn't conflict between tests. |
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*/ |
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isolateModules(fn: () => void): Jest; |
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/** |
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* When mocking time, `Date.now()` will also be mocked. If you for some reason need access to the real current time, you can invoke this function. |
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* |
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* > Note: This function is only available when using Lolex as fake timers implementation |
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*/ |
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getRealSystemTime(): number; |
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/** |
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* Set the current system time used by fake timers. Simulates a user changing the system clock while your program is running. It affects the current time but it does not in itself cause e.g. timers to fire; they will fire exactly as they would have done without the call to `jest.setSystemTime()`. |
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* |
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* > Note: This function is only available when using Lolex as fake timers implementation |
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*/ |
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setSystemTime(now?: number | Date): void; |
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}
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