Current File : //usr/share/nodejs/@types/node/test.d.ts
/**
* The `node:test` module provides a standalone testing module.
* @see [source](https://github.com/nodejs/node/blob/v18.x/lib/test.js)
*/
declare module "node:test" {
import { AsyncResource } from "node:async_hooks";
/**
* Programmatically start the test runner.
* @since v18.9.0
* @param options Configuration options for running tests.
* @returns A {@link TestsStream} that emits events about the test execution.
*/
function run(options?: RunOptions): TestsStream;
/**
* The `test()` function is the value imported from the test module. Each invocation of this
* function results in reporting the test to the {@link TestsStream}.
*
* The {@link TestContext} object passed to the fn argument can be used to perform actions
* related to the current test. Examples include skipping the test, adding additional
* diagnostic information, or creating subtests.
*
* `test()` returns a {@link Promise} that resolves once the test completes. The return value
* can usually be discarded for top level tests. However, the return value from subtests should
* be used to prevent the parent test from finishing first and cancelling the subtest as shown
* in the following example.
*
* ```js
* test('top level test', async (t) => {
* // The setTimeout() in the following subtest would cause it to outlive its
* // parent test if 'await' is removed on the next line. Once the parent test
* // completes, it will cancel any outstanding subtests.
* await t.test('longer running subtest', async (t) => {
* return new Promise((resolve, reject) => {
* setTimeout(resolve, 1000);
* });
* });
* });
* ```
* @since v18.0.0
* @param name The name of the test, which is displayed when reporting test results.
* Default: The `name` property of fn, or `'<anonymous>'` if `fn` does not have a name.
* @param options Configuration options for the test
* @param fn The function under test. The first argument to this function is a
* {@link TestContext} object. If the test uses callbacks, the callback function is
* passed as the second argument. Default: A no-op function.
* @returns A {@link Promise} resolved with `undefined` once the test completes.
*/
function test(name?: string, fn?: TestFn): Promise<void>;
function test(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
function test(options?: TestOptions, fn?: TestFn): Promise<void>;
function test(fn?: TestFn): Promise<void>;
namespace test {
export { after, afterEach, before, beforeEach, describe, it, mock, only, run, skip, test, todo };
}
/**
* @since v18.6.0
* @param name The name of the suite, which is displayed when reporting suite results.
* Default: The `name` property of fn, or `'<anonymous>'` if `fn` does not have a name.
* @param options Configuration options for the suite
* @param fn The function under suite. Default: A no-op function.
*/
function describe(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
function describe(name?: string, fn?: SuiteFn): Promise<void>;
function describe(options?: TestOptions, fn?: SuiteFn): Promise<void>;
function describe(fn?: SuiteFn): Promise<void>;
namespace describe {
/**
* Shorthand for skipping a suite, same as `describe([name], { skip: true }[, fn])`.
*/
function skip(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
function skip(name?: string, fn?: SuiteFn): Promise<void>;
function skip(options?: TestOptions, fn?: SuiteFn): Promise<void>;
function skip(fn?: SuiteFn): Promise<void>;
/**
* Shorthand for marking a suite as `TODO`, same as `describe([name], { todo: true }[, fn])`.
*/
function todo(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
function todo(name?: string, fn?: SuiteFn): Promise<void>;
function todo(options?: TestOptions, fn?: SuiteFn): Promise<void>;
function todo(fn?: SuiteFn): Promise<void>;
/**
* Shorthand for marking a suite as `only`, same as `describe([name], { only: true }[, fn])`.
* @since v18.15.0
*/
function only(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
function only(name?: string, fn?: SuiteFn): Promise<void>;
function only(options?: TestOptions, fn?: SuiteFn): Promise<void>;
function only(fn?: SuiteFn): Promise<void>;
}
/**
* @since v18.6.0
* @param name The name of the test, which is displayed when reporting test results.
* Default: The `name` property of fn, or `'<anonymous>'` if `fn` does not have a name.
* @param options Configuration options for the test
* @param fn The function under test. If the test uses callbacks, the callback function is
* passed as the second argument. Default: A no-op function.
*/
function it(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
function it(name?: string, fn?: TestFn): Promise<void>;
function it(options?: TestOptions, fn?: TestFn): Promise<void>;
function it(fn?: TestFn): Promise<void>;
namespace it {
/**
* Shorthand for skipping a test, same as `it([name], { skip: true }[, fn])`.
*/
function skip(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
function skip(name?: string, fn?: TestFn): Promise<void>;
function skip(options?: TestOptions, fn?: TestFn): Promise<void>;
function skip(fn?: TestFn): Promise<void>;
/**
* Shorthand for marking a test as `TODO`, same as `it([name], { todo: true }[, fn])`.
*/
function todo(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
function todo(name?: string, fn?: TestFn): Promise<void>;
function todo(options?: TestOptions, fn?: TestFn): Promise<void>;
function todo(fn?: TestFn): Promise<void>;
/**
* Shorthand for marking a test as `only`, same as `it([name], { only: true }[, fn])`.
* @since v18.15.0
*/
function only(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
function only(name?: string, fn?: TestFn): Promise<void>;
function only(options?: TestOptions, fn?: TestFn): Promise<void>;
function only(fn?: TestFn): Promise<void>;
}
/**
* Shorthand for skipping a test, same as `test([name], { skip: true }[, fn])`.
* @since v18.17.0
*/
function skip(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
function skip(name?: string, fn?: TestFn): Promise<void>;
function skip(options?: TestOptions, fn?: TestFn): Promise<void>;
function skip(fn?: TestFn): Promise<void>;
/**
* Shorthand for marking a test as `TODO`, same as `test([name], { todo: true }[, fn])`.
* @since v18.17.0
*/
function todo(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
function todo(name?: string, fn?: TestFn): Promise<void>;
function todo(options?: TestOptions, fn?: TestFn): Promise<void>;
function todo(fn?: TestFn): Promise<void>;
/**
* Shorthand for marking a test as `only`, same as `test([name], { only: true }[, fn])`.
* @since v18.17.0
*/
function only(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
function only(name?: string, fn?: TestFn): Promise<void>;
function only(options?: TestOptions, fn?: TestFn): Promise<void>;
function only(fn?: TestFn): Promise<void>;
/**
* The type of a function under test. The first argument to this function is a
* {@link TestContext} object. If the test uses callbacks, the callback function is passed as
* the second argument.
*/
type TestFn = (t: TestContext, done: (result?: any) => void) => any;
/**
* The type of a function under Suite.
*/
type SuiteFn = (s: SuiteContext) => void | Promise<void>;
interface RunOptions {
/**
* If a number is provided, then that many files would run in parallel.
* If truthy, it would run (number of cpu cores - 1) files in parallel.
* If falsy, it would only run one file at a time.
* If unspecified, subtests inherit this value from their parent.
* @default true
*/
concurrency?: number | boolean | undefined;
/**
* An array containing the list of files to run.
* If unspecified, the test runner execution model will be used.
*/
files?: readonly string[] | undefined;
/**
* Allows aborting an in-progress test execution.
* @default undefined
*/
signal?: AbortSignal | undefined;
/**
* A number of milliseconds the test will fail after.
* If unspecified, subtests inherit this value from their parent.
* @default Infinity
*/
timeout?: number | undefined;
/**
* Sets inspector port of test child process.
* If a nullish value is provided, each process gets its own port,
* incremented from the primary's `process.debugPort`.
*/
inspectPort?: number | (() => number) | undefined;
/**
* That can be used to only run tests whose name matches the provided pattern.
* Test name patterns are interpreted as JavaScript regular expressions.
* For each test that is executed, any corresponding test hooks, such as `beforeEach()`, are also run.
*/
testNamePatterns?: string | RegExp | string[] | RegExp[];
/**
* A function that accepts the TestsStream instance and can be used to setup listeners before any tests are run.
*/
setup?: (root: Test) => void | Promise<void>;
/**
* Whether to run in watch mode or not.
* @default false
*/
watch?: boolean | undefined;
}
class Test extends AsyncResource {
concurrency: number;
nesting: number;
only: boolean;
reporter: TestsStream;
runOnlySubtests: boolean;
testNumber: number;
timeout: number | null;
}
/**
* A successful call of the `run()` method will return a new `TestsStream` object,
* streaming a series of events representing the execution of the tests.
* `TestsStream` will emit events in the order of the tests' definitions.
* @since v18.9.0
*/
interface TestsStream extends NodeJS.ReadableStream {
addListener(event: "test:diagnostic", listener: (data: DiagnosticData) => void): this;
addListener(event: "test:fail", listener: (data: TestFail) => void): this;
addListener(event: "test:pass", listener: (data: TestPass) => void): this;
addListener(event: "test:plan", listener: (data: TestPlan) => void): this;
addListener(event: "test:start", listener: (data: TestStart) => void): this;
addListener(event: "test:stderr", listener: (data: TestStderr) => void): this;
addListener(event: "test:stdout", listener: (data: TestStdout) => void): this;
addListener(event: string, listener: (...args: any[]) => void): this;
emit(event: "test:diagnostic", data: DiagnosticData): boolean;
emit(event: "test:fail", data: TestFail): boolean;
emit(event: "test:pass", data: TestPass): boolean;
emit(event: "test:plan", data: TestPlan): boolean;
emit(event: "test:start", data: TestStart): boolean;
emit(event: "test:stderr", data: TestStderr): boolean;
emit(event: "test:stdout", data: TestStdout): boolean;
emit(event: string | symbol, ...args: any[]): boolean;
on(event: "test:diagnostic", listener: (data: DiagnosticData) => void): this;
on(event: "test:fail", listener: (data: TestFail) => void): this;
on(event: "test:pass", listener: (data: TestPass) => void): this;
on(event: "test:plan", listener: (data: TestPlan) => void): this;
on(event: "test:start", listener: (data: TestStart) => void): this;
on(event: "test:stderr", listener: (data: TestStderr) => void): this;
on(event: "test:stdout", listener: (data: TestStdout) => void): this;
on(event: string, listener: (...args: any[]) => void): this;
once(event: "test:diagnostic", listener: (data: DiagnosticData) => void): this;
once(event: "test:fail", listener: (data: TestFail) => void): this;
once(event: "test:pass", listener: (data: TestPass) => void): this;
once(event: "test:plan", listener: (data: TestPlan) => void): this;
once(event: "test:start", listener: (data: TestStart) => void): this;
once(event: "test:stderr", listener: (data: TestStderr) => void): this;
once(event: "test:stdout", listener: (data: TestStdout) => void): this;
once(event: string, listener: (...args: any[]) => void): this;
prependListener(event: "test:diagnostic", listener: (data: DiagnosticData) => void): this;
prependListener(event: "test:fail", listener: (data: TestFail) => void): this;
prependListener(event: "test:pass", listener: (data: TestPass) => void): this;
prependListener(event: "test:plan", listener: (data: TestPlan) => void): this;
prependListener(event: "test:start", listener: (data: TestStart) => void): this;
prependListener(event: "test:stderr", listener: (data: TestStderr) => void): this;
prependListener(event: "test:stdout", listener: (data: TestStdout) => void): this;
prependListener(event: string, listener: (...args: any[]) => void): this;
prependOnceListener(event: "test:diagnostic", listener: (data: DiagnosticData) => void): this;
prependOnceListener(event: "test:fail", listener: (data: TestFail) => void): this;
prependOnceListener(event: "test:pass", listener: (data: TestPass) => void): this;
prependOnceListener(event: "test:plan", listener: (data: TestPlan) => void): this;
prependOnceListener(event: "test:start", listener: (data: TestStart) => void): this;
prependOnceListener(event: "test:stderr", listener: (data: TestStderr) => void): this;
prependOnceListener(event: "test:stdout", listener: (data: TestStdout) => void): this;
prependOnceListener(event: string, listener: (...args: any[]) => void): this;
}
/**
* An instance of `TestContext` is passed to each test function in order to interact with the
* test runner. However, the `TestContext` constructor is not exposed as part of the API.
* @since v18.0.0
*/
interface TestContext {
/**
* This function is used to create a hook running before subtest of the current test.
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
* the second argument. Default: A no-op function.
* @param options Configuration options for the hook.
* @since v18.17.0
*/
before: typeof before;
/**
* This function is used to create a hook running before each subtest of the current test.
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
* the second argument. Default: A no-op function.
* @param options Configuration options for the hook.
* @since v18.8.0
*/
beforeEach: typeof beforeEach;
/**
* This function is used to create a hook that runs after the current test finishes.
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
* the second argument. Default: A no-op function.
* @param options Configuration options for the hook.
* @since v18.13.0
*/
after: typeof after;
/**
* This function is used to create a hook running after each subtest of the current test.
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
* the second argument. Default: A no-op function.
* @param options Configuration options for the hook.
* @since v18.8.0
*/
afterEach: typeof afterEach;
/**
* This function is used to write diagnostics to the output. Any diagnostic information is
* included at the end of the test's results. This function does not return a value.
* @param message Message to be reported.
* @since v18.0.0
*/
diagnostic(message: string): void;
/**
* The name of the test.
* @since v18.8.0
*/
readonly name: string;
/**
* If `shouldRunOnlyTests` is truthy, the test context will only run tests that have the `only`
* option set. Otherwise, all tests are run. If Node.js was not started with the `--test-only`
* command-line option, this function is a no-op.
* @param shouldRunOnlyTests Whether or not to run `only` tests.
* @since v18.0.0
*/
runOnly(shouldRunOnlyTests: boolean): void;
/**
* Can be used to abort test subtasks when the test has been aborted.
* @since v18.7.0
*/
readonly signal: AbortSignal;
/**
* This function causes the test's output to indicate the test as skipped. If `message` is
* provided, it is included in the output. Calling `skip()` does not terminate execution of
* the test function. This function does not return a value.
* @param message Optional skip message.
* @since v18.0.0
*/
skip(message?: string): void;
/**
* This function adds a `TODO` directive to the test's output. If `message` is provided, it is
* included in the output. Calling `todo()` does not terminate execution of the test
* function. This function does not return a value.
* @param message Optional `TODO` message.
* @since v18.0.0
*/
todo(message?: string): void;
/**
* This function is used to create subtests under the current test. This function behaves in
* the same fashion as the top level {@link test} function.
* @since v18.0.0
* @param name The name of the test, which is displayed when reporting test results.
* Default: The `name` property of fn, or `'<anonymous>'` if `fn` does not have a name.
* @param options Configuration options for the test
* @param fn The function under test. This first argument to this function is a
* {@link TestContext} object. If the test uses callbacks, the callback function is
* passed as the second argument. Default: A no-op function.
* @returns A {@link Promise} resolved with `undefined` once the test completes.
*/
test: typeof test;
/**
* Each test provides its own MockTracker instance.
*/
readonly mock: MockTracker;
}
/**
* An instance of `SuiteContext` is passed to each suite function in order to
* interact with the test runner. However, the `SuiteContext` constructor is not
* exposed as part of the API.
* @since v18.7.0, v16.17.0
*/
class SuiteContext {
/**
* The name of the suite.
* @since v18.8.0, v16.18.0
*/
readonly name: string;
/**
* Can be used to abort test subtasks when the test has been aborted.
* @since v18.7.0, v16.17.0
*/
readonly signal: AbortSignal;
}
interface TestOptions {
/**
* If a number is provided, then that many tests would run in parallel.
* If truthy, it would run (number of cpu cores - 1) tests in parallel.
* For subtests, it will be `Infinity` tests in parallel.
* If falsy, it would only run one test at a time.
* If unspecified, subtests inherit this value from their parent.
* @default false
*/
concurrency?: number | boolean | undefined;
/**
* If truthy, and the test context is configured to run `only` tests, then this test will be
* run. Otherwise, the test is skipped.
* @default false
*/
only?: boolean | undefined;
/**
* Allows aborting an in-progress test.
* @since v18.8.0
*/
signal?: AbortSignal | undefined;
/**
* If truthy, the test is skipped. If a string is provided, that string is displayed in the
* test results as the reason for skipping the test.
* @default false
*/
skip?: boolean | string | undefined;
/**
* A number of milliseconds the test will fail after. If unspecified, subtests inherit this
* value from their parent.
* @default Infinity
* @since v18.7.0
*/
timeout?: number | undefined;
/**
* If truthy, the test marked as `TODO`. If a string is provided, that string is displayed in
* the test results as the reason why the test is `TODO`.
* @default false
*/
todo?: boolean | string | undefined;
}
/**
* This function is used to create a hook running before running a suite.
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
* the second argument. Default: A no-op function.
* @param options Configuration options for the hook.
* @since v18.8.0
*/
function before(fn?: HookFn, options?: HookOptions): void;
/**
* This function is used to create a hook running after running a suite.
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
* the second argument. Default: A no-op function.
* @param options Configuration options for the hook.
* @since v18.8.0
*/
function after(fn?: HookFn, options?: HookOptions): void;
/**
* This function is used to create a hook running before each subtest of the current suite.
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
* the second argument. Default: A no-op function.
* @param options Configuration options for the hook.
* @since v18.8.0
*/
function beforeEach(fn?: HookFn, options?: HookOptions): void;
/**
* This function is used to create a hook running after each subtest of the current test.
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
* the second argument. Default: A no-op function.
* @param options Configuration options for the hook.
* @since v18.8.0
*/
function afterEach(fn?: HookFn, options?: HookOptions): void;
/**
* The hook function. If the hook uses callbacks, the callback function is passed as the
* second argument.
*/
type HookFn = (s: SuiteContext, done: (result?: any) => void) => any;
/**
* Configuration options for hooks.
* @since v18.8.0
*/
interface HookOptions {
/**
* Allows aborting an in-progress hook.
*/
signal?: AbortSignal | undefined;
/**
* A number of milliseconds the hook will fail after. If unspecified, subtests inherit this
* value from their parent.
* @default Infinity
*/
timeout?: number | undefined;
}
interface MockFunctionOptions {
/**
* The number of times that the mock will use the behavior of `implementation`.
* Once the mock function has been called `times` times,
* it will automatically restore the behavior of `original`.
* This value must be an integer greater than zero.
* @default Infinity
*/
times?: number | undefined;
}
interface MockMethodOptions extends MockFunctionOptions {
/**
* If `true`, `object[methodName]` is treated as a getter.
* This option cannot be used with the `setter` option.
*/
getter?: boolean | undefined;
/**
* If `true`, `object[methodName]` is treated as a setter.
* This option cannot be used with the `getter` option.
*/
setter?: boolean | undefined;
}
type Mock<F extends Function> = F & {
mock: MockFunctionContext<F>;
};
type NoOpFunction = (...args: any[]) => undefined;
type FunctionPropertyNames<T> = {
[K in keyof T]: T[K] extends Function ? K : never;
}[keyof T];
interface MockTracker {
/**
* This function is used to create a mock function.
* @param original An optional function to create a mock on.
* @param implementation An optional function used as the mock implementation for `original`.
* This is useful for creating mocks that exhibit one behavior for a specified number of calls and then restore the behavior of `original`.
* @param options Optional configuration options for the mock function.
*/
fn<F extends Function = NoOpFunction>(original?: F, options?: MockFunctionOptions): Mock<F>;
fn<F extends Function = NoOpFunction, Implementation extends Function = F>(
original?: F,
implementation?: Implementation,
options?: MockFunctionOptions,
): Mock<F | Implementation>;
/**
* This function is used to create a mock on an existing object method.
* @param object The object whose method is being mocked.
* @param methodName The identifier of the method on `object` to mock. If `object[methodName]` is not a function, an error is thrown.
* @param implementation An optional function used as the mock implementation for `object[methodName]`.
* @param options Optional configuration options for the mock method.
*/
method<
MockedObject extends object,
MethodName extends FunctionPropertyNames<MockedObject>,
>(
object: MockedObject,
methodName: MethodName,
options?: MockFunctionOptions,
): MockedObject[MethodName] extends Function ? Mock<MockedObject[MethodName]>
: never;
method<
MockedObject extends object,
MethodName extends FunctionPropertyNames<MockedObject>,
Implementation extends Function,
>(
object: MockedObject,
methodName: MethodName,
implementation: Implementation,
options?: MockFunctionOptions,
): MockedObject[MethodName] extends Function ? Mock<MockedObject[MethodName] | Implementation>
: never;
method<MockedObject extends object>(
object: MockedObject,
methodName: keyof MockedObject,
options: MockMethodOptions,
): Mock<Function>;
method<MockedObject extends object>(
object: MockedObject,
methodName: keyof MockedObject,
implementation: Function,
options: MockMethodOptions,
): Mock<Function>;
/**
* This function is syntax sugar for {@link MockTracker.method} with `options.getter` set to `true`.
*/
getter<
MockedObject extends object,
MethodName extends keyof MockedObject,
>(
object: MockedObject,
methodName: MethodName,
options?: MockFunctionOptions,
): Mock<() => MockedObject[MethodName]>;
getter<
MockedObject extends object,
MethodName extends keyof MockedObject,
Implementation extends Function,
>(
object: MockedObject,
methodName: MethodName,
implementation?: Implementation,
options?: MockFunctionOptions,
): Mock<(() => MockedObject[MethodName]) | Implementation>;
/**
* This function is syntax sugar for {@link MockTracker.method} with `options.setter` set to `true`.
*/
setter<
MockedObject extends object,
MethodName extends keyof MockedObject,
>(
object: MockedObject,
methodName: MethodName,
options?: MockFunctionOptions,
): Mock<(value: MockedObject[MethodName]) => void>;
setter<
MockedObject extends object,
MethodName extends keyof MockedObject,
Implementation extends Function,
>(
object: MockedObject,
methodName: MethodName,
implementation?: Implementation,
options?: MockFunctionOptions,
): Mock<((value: MockedObject[MethodName]) => void) | Implementation>;
/**
* This function restores the default behavior of all mocks that were previously created by this `MockTracker`
* and disassociates the mocks from the `MockTracker` instance. Once disassociated, the mocks can still be used,
* but the `MockTracker` instance can no longer be used to reset their behavior or otherwise interact with them.
*
* After each test completes, this function is called on the test context's `MockTracker`.
* If the global `MockTracker` is used extensively, calling this function manually is recommended.
*/
reset(): void;
/**
* This function restores the default behavior of all mocks that were previously created by this `MockTracker`.
* Unlike `mock.reset()`, `mock.restoreAll()` does not disassociate the mocks from the `MockTracker` instance.
*/
restoreAll(): void;
}
const mock: MockTracker;
interface MockFunctionCall<
F extends Function,
ReturnType = F extends (...args: any) => infer T ? T
: F extends abstract new(...args: any) => infer T ? T
: unknown,
Args = F extends (...args: infer Y) => any ? Y
: F extends abstract new(...args: infer Y) => any ? Y
: unknown[],
> {
/**
* An array of the arguments passed to the mock function.
*/
arguments: Args;
/**
* If the mocked function threw then this property contains the thrown value.
*/
error: unknown | undefined;
/**
* The value returned by the mocked function.
*
* If the mocked function threw, it will be `undefined`.
*/
result: ReturnType | undefined;
/**
* An `Error` object whose stack can be used to determine the callsite of the mocked function invocation.
*/
stack: Error;
/**
* If the mocked function is a constructor, this field contains the class being constructed.
* Otherwise this will be `undefined`.
*/
target: F extends abstract new(...args: any) => any ? F : undefined;
/**
* The mocked function's `this` value.
*/
this: unknown;
}
interface MockFunctionContext<F extends Function> {
/**
* A getter that returns a copy of the internal array used to track calls to the mock.
*/
readonly calls: Array<MockFunctionCall<F>>;
/**
* This function returns the number of times that this mock has been invoked.
* This function is more efficient than checking `ctx.calls.length`
* because `ctx.calls` is a getter that creates a copy of the internal call tracking array.
*/
callCount(): number;
/**
* This function is used to change the behavior of an existing mock.
* @param implementation The function to be used as the mock's new implementation.
*/
mockImplementation(implementation: Function): void;
/**
* This function is used to change the behavior of an existing mock for a single invocation.
* Once invocation `onCall` has occurred, the mock will revert to whatever behavior
* it would have used had `mockImplementationOnce()` not been called.
* @param implementation The function to be used as the mock's implementation for the invocation number specified by `onCall`.
* @param onCall The invocation number that will use `implementation`.
* If the specified invocation has already occurred then an exception is thrown.
*/
mockImplementationOnce(implementation: Function, onCall?: number): void;
/**
* Resets the call history of the mock function.
*/
resetCalls(): void;
/**
* Resets the implementation of the mock function to its original behavior.
* The mock can still be used after calling this function.
*/
restore(): void;
}
export { after, afterEach, before, beforeEach, describe, it, mock, run, test, test as default };
}
interface DiagnosticData {
/**
* The diagnostic message.
*/
message: string;
/**
* The nesting level of the test.
*/
nesting: number;
/**
* The path of the test file, undefined if test is not ran through a file.
*/
file?: string;
}
interface TestFail {
/**
* Additional execution metadata.
*/
details: {
/**
* The duration of the test in milliseconds.
*/
duration_ms: number;
/**
* The error thrown by the test.
*/
error: Error;
/**
* The type of the test, used to denote whether this is a suite.
* @since 18.17.0
*/
type?: "suite";
};
/**
* The test name.
*/
name: string;
/**
* The nesting level of the test.
*/
nesting: number;
/**
* The ordinal number of the test.
*/
testNumber: number;
/**
* Present if `context.todo` is called.
*/
todo?: string | boolean;
/**
* Present if `context.skip` is called.
*/
skip?: string | boolean;
/**
* The path of the test file, undefined if test is not ran through a file.
*/
file?: string;
}
interface TestPass {
/**
* Additional execution metadata.
*/
details: {
/**
* The duration of the test in milliseconds.
*/
duration_ms: number;
/**
* The type of the test, used to denote whether this is a suite.
* @since 18.17.0
*/
type?: "suite";
};
/**
* The test name.
*/
name: string;
/**
* The nesting level of the test.
*/
nesting: number;
/**
* The ordinal number of the test.
*/
testNumber: number;
/**
* Present if `context.todo` is called.
*/
todo?: string | boolean;
/**
* Present if `context.skip` is called.
*/
skip?: string | boolean;
/**
* The path of the test file, undefined if test is not ran through a file.
*/
file?: string;
}
interface TestPlan {
/**
* The nesting level of the test.
*/
nesting: number;
/**
* The number of subtests that have ran.
*/
count: number;
/**
* The path of the test file, undefined if test is not ran through a file.
*/
file?: string;
}
interface TestStart {
/**
* The test name.
*/
name: string;
/**
* The nesting level of the test.
*/
nesting: number;
/**
* The path of the test file, undefined if test is not ran through a file.
*/
file?: string;
}
interface TestStderr {
/**
* The path of the test file, undefined if test is not ran through a file.
*/
file?: string;
/**
* The message written to `stderr`
*/
message: string;
}
interface TestStdout {
/**
* The path of the test file, undefined if test is not ran through a file.
*/
file?: string;
/**
* The message written to `stdout`
*/
message: string;
}
interface TestEnqueue {
/**
* The test name
*/
name: string;
/**
* The path of the test file, undefined if test is not ran through a file.
*/
file?: string;
/**
* The nesting level of the test.
*/
nesting: number;
}
interface TestDequeue {
/**
* The test name
*/
name: string;
/**
* The path of the test file, undefined if test is not ran through a file.
*/
file?: string;
/**
* The nesting level of the test.
*/
nesting: number;
}
/**
* The `node:test/reporters` module exposes the builtin-reporters for `node:test`.
* To access it:
*
* ```js
* import test from 'node:test/reporters';
* ```
*
* This module is only available under the `node:` scheme. The following will not
* work:
*
* ```js
* import test from 'test/reporters';
* ```
* @since v18.17.0
* @see [source](https://github.com/nodejs/node/blob/v18.17.0/lib/test/reporters.js)
*/
declare module "node:test/reporters" {
import { Transform } from "node:stream";
type TestEvent =
| { type: "test:diagnostic"; data: DiagnosticData }
| { type: "test:fail"; data: TestFail }
| { type: "test:pass"; data: TestPass }
| { type: "test:plan"; data: TestPlan }
| { type: "test:start"; data: TestStart }
| { type: "test:stderr"; data: TestStderr }
| { type: "test:stdout"; data: TestStdout }
| { type: "test:enqueue"; data: TestEnqueue }
| { type: "test:dequeue"; data: TestDequeue }
| { type: "test:watch:drained" };
type TestEventGenerator = AsyncGenerator<TestEvent, void>;
/**
* The `dot` reporter outputs the test results in a compact format,
* where each passing test is represented by a `.`,
* and each failing test is represented by a `X`.
*/
function dot(source: TestEventGenerator): AsyncGenerator<"\n" | "." | "X", void>;
/**
* The `tap` reporter outputs the test results in the [TAP](https://testanything.org/) format.
*/
function tap(source: TestEventGenerator): AsyncGenerator<string, void>;
/**
* The `spec` reporter outputs the test results in a human-readable format.
*/
class Spec extends Transform {
constructor();
}
export { dot, Spec as spec, tap, TestEvent };
}
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