@sprucelabs/test-utils/build/esm/MockFetch.js

Helpful utilities to make asserting more complicated conditions quick and easy! ⚡️

import assert from './assert/assert.js';
export default class MockFetch {
    constructor() {
        this.requestLog = [];
        this.responses = {
            '*': new Response(JSON.stringify({
                success: true,
            }), { status: 200 }),
        };
    }
    buildFetch() {
        return async (url, init) => {
            var _a;
            this.requestLog.push({ url, init });
            const key = this.generateResponseKey(url, init);
            return ((_a = this.responses[key]) !== null && _a !== void 0 ? _a : this.responses['*']).clone();
        };
    }
    assertWasCalled(url, init) {
        assert.isTruthy(this.wasCalled, 'Expected fetch() to have been called.');
        if (url) {
            const lastUrl = this.lastUrl;
            assert.isEqual(lastUrl, url, `Expected fetch() to have been called with URL "${url}", but it was called with "${lastUrl}".`);
        }
        if (init) {
            assert.isEqualDeep(this.lastInit, init, `Expected fetch() to have been called with init "${JSON.stringify(init)}", but it was called with "${JSON.stringify(this.lastInit)}".`);
        }
    }
    get lastInit() {
        return this.requestLog[this.requestLog.length - 1].init;
    }
    get wasCalled() {
        return this.requestLog.length > 0;
    }
    get urlsCalled() {
        return this.requestLog.map((req) => req.url);
    }
    get lastUrl() {
        return this.urlsCalled[this.urlsCalled.length - 1];
    }
    assertMadeRequests(expected) {
        const expectedAsObjects = expected.map((req) => {
            if (typeof req === 'string' || req instanceof URL) {
                return { url: req, init: undefined };
            }
            return req;
        });
        assert.isEqualDeep(this.requestLog, expectedAsObjects, `Expected fetch() to have been called with URL and init combinations as specified.`);
    }
    setResponse(response, url, init) {
        const key = this.generateResponseKey(url, init);
        this.responses[key] = response;
    }
    generateResponseKey(url, init) {
        var _a;
        return `${(_a = url === null || url === void 0 ? void 0 : url.toString()) !== null && _a !== void 0 ? _a : '*'}${init ? JSON.stringify(init) : ''}`;
    }
}