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Related to #1. Add jest and first unit tests. (#2)
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rstropek authored Jan 10, 2021
1 parent 8052c90 commit d9dd459
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116 changes: 116 additions & 0 deletions .gitignore
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# Logs
logs
*.log
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yarn-debug.log*
yarn-error.log*
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# Diagnostic reports (https://nodejs.org/api/report.html)
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out

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# public

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53 changes: 53 additions & 0 deletions index.test.js
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const { Timeout, Interval } = require( "date-timeout-interval");
require('jest');

beforeEach(() => {
jest.useFakeTimers();
});

describe('state tests', () => {
test('state is set to 0 after creation of timer', () => {
const to = new Timeout(() => {}, 0);
expect(to.state).toBe(0);
});

// The following test does not complete successfully. Might be a bug.
test.skip('state is set to 1 when timer has been started', () => {
const waitTime = 1000;
const callback = jest.fn();
const to = new Timeout(callback, waitTime);
to.start();
expect(to.state).toBe(1);
});

test('state is set to 3 and callback is called after timer is completed', () => {
const waitTime = 1000;
const callback = jest.fn();
const to = new Timeout(callback, waitTime);
to.start();

jest.runAllTimers();
expect(to.state).toBe(3);
expect(callback).toBeCalled();
expect(callback).toHaveBeenCalledTimes(1);
});
});

describe('time start tests', () => {
test('timeout is not started when autostart is false', () => {
const to = new Timeout(() => {}, 0, false);
expect(setTimeout).toHaveBeenCalledTimes(0);
});

test('timeout is not started when autostart is not specified', () => {
const to = new Timeout(() => {}, 0);
expect(setTimeout).toHaveBeenCalledTimes(0);
});

test('timeout is started when autostart is true', () => {
const waitTime = 1000;
const to = new Timeout(() => {}, waitTime, true);
expect(setTimeout).toHaveBeenCalledTimes(1);
expect(setTimeout).toHaveBeenLastCalledWith(expect.any(Function), waitTime);
});
});
7 changes: 5 additions & 2 deletions package.json
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"description": "Implementation of setTimeout and setInterval with pause",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
"test": "jest"
},
"repository": {
"type": "git",
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"bugs": {
"url": "https://github.com/blaumeise20/date-timeout-interval/issues"
},
"homepage": "https://github.com/blaumeise20/date-timeout-interval#readme"
"homepage": "https://github.com/blaumeise20/date-timeout-interval#readme",
"devDependencies": {
"jest": "^26.6.3"
}
}

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