wp-calypso/client/state/selectors/test/get-jetpack-module.js

import getJetpackModule from 'calypso/state/selectors/get-jetpack-module';
import { moduleData as MODULE_DATA_FIXTURE } from './fixtures/jetpack-modules';

describe( 'getJetpackModule()', () => {
	test( 'should return data for a specified module for a known site', () => {
		const stateIn = {
			jetpack: {
				modules: {
					items: {
						123456: MODULE_DATA_FIXTURE,
					},
				},
			},
		};
		const siteId = 123456;
		const output = getJetpackModule( stateIn, siteId, 'module-a' );
		expect( output ).toEqual( MODULE_DATA_FIXTURE[ 'module-a' ] );
	} );

	test( 'should return null for an unknown site', () => {
		const stateIn = {
			jetpack: {
				modules: {
					items: {
						654321: MODULE_DATA_FIXTURE,
					},
				},
			},
		};
		const siteId = 123456;
		const output = getJetpackModule( stateIn, siteId, 'module-a' );
		expect( output ).toBeNull();
	} );

	test( 'should return null for an unknown module', () => {
		const stateIn = {
			jetpack: {
				modules: {
					items: {
						123456: MODULE_DATA_FIXTURE,
					},
				},
			},
		};
		const siteId = 123456;
		const output = getJetpackModule( stateIn, siteId, 'module-z' );
		expect( output ).toBeNull();
	} );
} );