repos / starfx

test.ts

 1export { assert } from "https://deno.land/std@0.187.0/testing/asserts.ts";
 2export {
 3  afterAll,
 4  beforeAll,
 5  beforeEach,
 6  describe,
 7  it,
 8} from "https://deno.land/std@0.163.0/testing/bdd.ts";
 9export * as asserts from "https://deno.land/std@0.185.0/testing/asserts.ts";
10export { expect } from "https://deno.land/x/expect@v0.3.0/mod.ts";
11export { install, mock } from "https://deno.land/x/mock_fetch@0.3.0/mod.ts";
12
13export function isLikeSelector(selector: unknown) {
14  return (
15    selector !== null &&
16    typeof selector === "object" &&
17    Reflect.getPrototypeOf(selector) === Object.prototype &&
18    Reflect.ownKeys(selector).length > 0
19  );
20}
21
22export const CIRCULAR_SELECTOR = new Error("Encountered a circular selector");
23
24export function assertLike(
25  lhs: Record<any, any>,
26  selector: Record<any, any>,
27  circular = new Set(),
28) {
29  if (circular.has(selector)) {
30    throw CIRCULAR_SELECTOR;
31  }
32
33  circular.add(selector);
34
35  if (lhs === null || typeof lhs !== "object") {
36    return lhs;
37  }
38
39  const comparable: Record<any, any> = {};
40  for (const [key, rhs] of Object.entries(selector)) {
41    if (isLikeSelector(rhs)) {
42      comparable[key] = assertLike(Reflect.get(lhs, key), rhs, circular);
43    } else {
44      comparable[key] = Reflect.get(lhs, key);
45    }
46  }
47
48  return comparable;
49}