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fix(packages/grpc-js/test/assert2): move assert2 into its own file
Moving from exporting a namespace to just putting assert2 functions into their own files Fixes #2464
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/* | ||
* Copyright 2019 gRPC authors. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
* | ||
*/ | ||
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import * as assert from 'assert'; | ||
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const toCall = new Map<() => void, number>(); | ||
const afterCallsQueue: Array<() => void> = []; | ||
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/** | ||
* Assert that the given function doesn't throw an error, and then return | ||
* its value. | ||
* @param fn The function to evaluate. | ||
*/ | ||
export function noThrowAndReturn<T>(fn: () => T): T { | ||
try { | ||
return fn(); | ||
} catch (e) { | ||
assert.throws(() => { | ||
throw e; | ||
}); | ||
throw e; // for type safety only | ||
} | ||
} | ||
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/** | ||
* Helper function that returns true when every function wrapped with | ||
* mustCall has been called. | ||
*/ | ||
function mustCallsSatisfied(): boolean { | ||
let result = true; | ||
toCall.forEach(value => { | ||
result = result && value === 0; | ||
}); | ||
return result; | ||
} | ||
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export function clearMustCalls(): void { | ||
afterCallsQueue.length = 0; | ||
} | ||
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/** | ||
* Wraps a function to keep track of whether it was called or not. | ||
* @param fn The function to wrap. | ||
*/ | ||
// tslint:disable:no-any | ||
export function mustCall<T>(fn: (...args: any[]) => T): (...args: any[]) => T { | ||
const existingValue = toCall.get(fn); | ||
if (existingValue !== undefined) { | ||
toCall.set(fn, existingValue + 1); | ||
} else { | ||
toCall.set(fn, 1); | ||
} | ||
return (...args: any[]) => { | ||
const result = fn(...args); | ||
const existingValue = toCall.get(fn); | ||
if (existingValue !== undefined) { | ||
toCall.set(fn, existingValue - 1); | ||
} | ||
if (mustCallsSatisfied()) { | ||
afterCallsQueue.forEach(fn => fn()); | ||
afterCallsQueue.length = 0; | ||
} | ||
return result; | ||
}; | ||
} | ||
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/** | ||
* Calls the given function when every function that was wrapped with | ||
* mustCall has been called. | ||
* @param fn The function to call once all mustCall-wrapped functions have | ||
* been called. | ||
*/ | ||
export function afterMustCallsSatisfied(fn: () => void): void { | ||
if (!mustCallsSatisfied()) { | ||
afterCallsQueue.push(fn); | ||
} else { | ||
fn(); | ||
} | ||
} |
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