74 lines
2.1 KiB
JavaScript
74 lines
2.1 KiB
JavaScript
/* eslint-disable no-underscore-dangle */
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import { gql, execute, ApolloLink, Observable } from '@apollo/client/core';
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import { testApolloLink } from 'helpers/test_apollo_link';
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import { getPersistLink } from '~/lib/apollo/persist_link';
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const DEFAULT_QUERY = gql`
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query {
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foo {
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bar
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}
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}
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`;
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const QUERY_WITH_DIRECTIVE = gql`
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query {
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foo @persist {
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bar
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}
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}
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`;
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const QUERY_WITH_PERSIST_FIELD = gql`
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query {
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foo @persist {
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bar
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__persist
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}
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}
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`;
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const terminatingLink = new ApolloLink(() => Observable.of({ data: { foo: { bar: 1 } } }));
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describe('~/lib/apollo/persist_link', () => {
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let subscription;
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afterEach(() => {
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if (subscription) {
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subscription.unsubscribe();
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}
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});
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it('removes `@persist` directive from the operation', async () => {
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const operation = await testApolloLink(getPersistLink(), {}, QUERY_WITH_DIRECTIVE);
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const { selections } = operation.query.definitions[0].selectionSet;
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expect(selections[0].directives).toEqual([]);
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});
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it('removes `__persist` fields from the operation with `@persist` directive', async () => {
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const operation = await testApolloLink(getPersistLink(), {}, QUERY_WITH_PERSIST_FIELD);
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const { selections } = operation.query.definitions[0].selectionSet;
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const childFields = selections[0].selectionSet.selections;
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expect(childFields).toHaveLength(1);
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expect(childFields.some((field) => field.name.value === '__persist')).toBe(false);
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});
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it('decorates the response with `__persist: true` is there is `__persist` field in the query', async () => {
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const link = getPersistLink().concat(terminatingLink);
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subscription = execute(link, { query: QUERY_WITH_PERSIST_FIELD }).subscribe(({ data }) => {
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expect(data.foo.__persist).toBe(true);
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});
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});
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it('does not decorate the response with `__persist: true` is there if query is not persistent', async () => {
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const link = getPersistLink().concat(terminatingLink);
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subscription = execute(link, { query: DEFAULT_QUERY }).subscribe(({ data }) => {
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expect(data.foo.__persist).toBe(undefined);
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});
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});
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});
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