38 lines
1.6 KiB
TypeScript
38 lines
1.6 KiB
TypeScript
// Block scoped definitions work poorly for global variables, temporarily enable var
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/* eslint-disable no-var */
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// this will work in the browser via browserify
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declare var assert: typeof _chai.assert;
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declare var expect: typeof _chai.expect;
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var _chai: typeof import("chai") = require("chai");
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globalThis.assert = _chai.assert;
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{
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// chai's builtin `assert.isFalse` is featureful but slow - we don't use those features,
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// so we'll just overwrite it as an alterative to migrating a bunch of code off of chai
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assert.isFalse = (expr: any, msg: string) => {
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if (expr !== false) throw new Error(msg);
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};
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const assertDeepImpl = assert.deepEqual;
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assert.deepEqual = (a, b, msg) => {
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if (ts.isArray(a) && ts.isArray(b)) {
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assertDeepImpl(arrayExtraKeysObject(a), arrayExtraKeysObject(b), "Array extra keys differ");
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}
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assertDeepImpl(a, b, msg);
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function arrayExtraKeysObject(a: readonly ({} | null | undefined)[]): object {
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const obj: { [key: string]: {} | null | undefined } = {};
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for (const key in a) {
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if (Number.isNaN(Number(key))) {
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obj[key] = a[key];
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}
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}
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return obj;
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}
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};
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}
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globalThis.expect = _chai.expect;
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/* eslint-enable no-var */
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// empty ts namespace so this file is included in the `ts.ts` namespace file generated by the module swapover
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// This way, everything that ends up importing `ts` downstream also imports this file and picks up its augmentation
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namespace ts {} |