mirror of https://github.com/grpc/grpc-node.git
86 lines
2.1 KiB
TypeScript
86 lines
2.1 KiB
TypeScript
import * as assert from 'assert';
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export function mockFunction(): never {
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throw new Error('Not implemented');
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}
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// tslint:disable-next-line:no-namespace
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export namespace assert2 {
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const toCall = new Map<() => void, number>();
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const afterCallsQueue: Array<() => void> = [];
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/**
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* Assert that the given function doesn't throw an error, and then return
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* its value.
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* @param fn The function to evaluate.
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*/
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export function noThrowAndReturn<T>(fn: () => T): T {
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try {
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return fn();
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} catch (e) {
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assert.throws(() => {
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throw e;
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});
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throw e; // for type safety only
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}
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}
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/**
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* Helper function that returns true when every function wrapped with
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* mustCall has been called.
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*/
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function mustCallsSatisfied(): boolean {
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let result = true;
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toCall.forEach((value) => {
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result = result && value === 0;
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});
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return result;
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}
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export function clearMustCalls(): void {
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afterCallsQueue.length = 0;
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}
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/**
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* Wraps a function to keep track of whether it was called or not.
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* @param fn The function to wrap.
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*/
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// tslint:disable:no-any
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export function mustCall<T>(fn: (...args: any[]) => T):
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(...args: any[]) => T {
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const existingValue = toCall.get(fn);
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if (existingValue !== undefined) {
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toCall.set(fn, existingValue + 1);
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} else {
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toCall.set(fn, 1);
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}
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return (...args: any[]) => {
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const result = fn(...args);
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const existingValue = toCall.get(fn);
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if (existingValue !== undefined) {
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toCall.set(fn, existingValue - 1);
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}
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if (mustCallsSatisfied()) {
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afterCallsQueue.forEach(fn => fn());
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afterCallsQueue.length = 0;
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}
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return result;
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};
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}
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// tslint:enable:no-any
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/**
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* Calls the given function when every function that was wrapped with
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* mustCall has been called.
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* @param fn The function to call once all mustCall-wrapped functions have
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* been called.
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*/
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export function afterMustCallsSatisfied(fn: () => void): void {
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if (!mustCallsSatisfied()) {
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afterCallsQueue.push(fn);
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} else {
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fn();
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}
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}
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}
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