82c43ba2e3
Remove convention where Async suffix is added to functions that returns a Promise. It was a habit from C#, but is not widely used in JavaScript / TypeScript world, also bloats the code. The code is more consistent with third party dependencies/frameworks without the suffix.
61 lines
1.9 KiB
TypeScript
61 lines
1.9 KiB
TypeScript
import 'mocha';
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import { expect } from 'chai';
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import { ApplicationFactory, ApplicationGetter } from '@/application/ApplicationFactory';
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import { ApplicationStub } from '@tests/unit/stubs/ApplicationStub';
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describe('ApplicationFactory', () => {
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describe('ctor', () => {
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it('throws if getter is undefined', () => {
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// arrange
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const expectedError = 'undefined getter';
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const getter = undefined;
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// act
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const act = () => new SystemUnderTest(getter);
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// assert
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expect(act).to.throw(expectedError);
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});
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});
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describe('getApp', () => {
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it('returns result from the getter', async () => {
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// arrange
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const expected = new ApplicationStub();
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const getter: ApplicationGetter = () => expected;
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const sut = new SystemUnderTest(getter);
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// act
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const actual = await Promise.all( [
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sut.getApp(),
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sut.getApp(),
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sut.getApp(),
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sut.getApp(),
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]);
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// assert
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expect(actual.every((value) => value === expected));
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});
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it('only executes getter once', async () => {
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// arrange
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let totalExecution = 0;
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const expected = new ApplicationStub();
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const getter: ApplicationGetter = () => {
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totalExecution++;
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return expected;
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};
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const sut = new SystemUnderTest(getter);
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// act
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await Promise.all( [
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sut.getApp(),
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sut.getApp(),
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sut.getApp(),
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sut.getApp(),
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]);
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// assert
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expect(totalExecution).to.equal(1);
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});
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});
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});
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class SystemUnderTest extends ApplicationFactory {
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public constructor(costlyGetter: ApplicationGetter) {
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super(costlyGetter);
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}
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}
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