61 lines
1.7 KiB
TypeScript
61 lines
1.7 KiB
TypeScript
import { Value, is, preserves, strip } from '../src/index';
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import '../src/node_support';
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declare global {
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namespace jest {
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interface Matchers<R> {
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is<T extends object>(expected: Value<T>): R;
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toThrowFilter(f: (e: Error) => boolean): R;
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}
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}
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}
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expect.extend({
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is(actual, expected) {
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return is(actual, expected)
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? { message: () => preserves`expected ${actual} not to be Preserves.is to ${expected}`,
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pass: true }
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: { message: () => preserves`expected ${actual} to be Preserves.is to ${expected}`,
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pass: false };
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},
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toThrowFilter(thunk, f) {
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try {
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thunk();
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return { message: () => preserves`expected an exception`, pass: false };
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} catch (e) {
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if (f(e)) {
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return { message: () => preserves`expected an exception not matching the filter`,
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pass: true };
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} else {
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return { message: () => preserves`expected an exception matching the filter: ${e.constructor.name}`,
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pass: false };
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}
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}
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}
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});
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export class Pointer {
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v: Value<Pointer>;
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constructor(v: Value<Pointer>) {
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this.v = v;
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}
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equals(other: any, is: (a: any, b: any) => boolean) {
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return Object.is(other.constructor, this.constructor) && is(this.v, other.v);
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}
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asPreservesText(): string {
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return '#!' + this.v.asPreservesText();
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}
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}
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export function decodePointer(v: Value<Pointer>): Pointer {
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return new Pointer(strip(v));
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}
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export function encodePointer(w: Pointer): Value<Pointer> {
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return w.v;
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}
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