@zendesk/laika
Version:
Test, mock, intercept and modify Apollo Client's operations — in both browser and unit tests!
68 lines • 3.37 kB
JavaScript
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
import gql from 'graphql-tag';
import waitFor from 'wait-for-observables';
import { ApolloLink, Observable } from '@apollo/client/core';
import { createLazyLoadableLink } from './createLazyLoadableLink';
import { executeLink, observableOf, onNextTick, } from './testUtils';
const query = gql `
query helloQuery {
sample {
id
}
}
`;
const subscription = gql `
subscription helloSubscription {
sample {
id
}
}
`;
const data = { data: { hello: 'world' } };
describe('createLazyLoadableLink', () => {
it('returns passthrough data from the following link', () => __awaiter(void 0, void 0, void 0, function* () {
const link = createLazyLoadableLink(Promise.resolve(new ApolloLink(() => observableOf(data))));
const [result] = (yield waitFor(executeLink(link, { query })));
const { values } = result;
expect(values).toEqual([data]);
}));
it('correctly emits subsequent values from the following link and completes the returned Observable when the Observable returned from the lazily loaded link completes', () => __awaiter(void 0, void 0, void 0, function* () {
let observer;
const link = createLazyLoadableLink(Promise.resolve(new ApolloLink(() => new Observable((obs) => {
observer = obs;
}))));
const outerObserver = {
next: jest.fn(),
complete: jest.fn(),
error: jest.fn(),
};
const sub = executeLink(link, { query: subscription }).subscribe(outerObserver);
expect.assertions(9);
yield onNextTick(() => {
var _a, _b, _c;
const activeObserver = observer;
(_a = activeObserver.next) === null || _a === void 0 ? void 0 : _a.call(activeObserver, 1);
expect(outerObserver.next).toHaveBeenCalledTimes(1);
expect(outerObserver.next).toHaveBeenLastCalledWith(1);
expect(outerObserver.complete).not.toHaveBeenCalled();
(_b = activeObserver.next) === null || _b === void 0 ? void 0 : _b.call(activeObserver, 2);
expect(outerObserver.next).toHaveBeenCalledTimes(2);
expect(outerObserver.next).toHaveBeenLastCalledWith(2);
expect(outerObserver.complete).not.toHaveBeenCalled();
(_c = activeObserver.complete) === null || _c === void 0 ? void 0 : _c.call(activeObserver);
expect(outerObserver.complete).toHaveBeenCalledTimes(1);
expect(outerObserver.next).toHaveBeenLastCalledWith(2);
expect(outerObserver.error).not.toHaveBeenCalled();
sub.unsubscribe();
});
}));
});
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