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July 21, 2024 07:03
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A no-bullshit-stupid-simple-test-runner for node
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| /* | |
| // USAGE: | |
| const { describe, it, run, assert } = require('./stupid-test-runner.js'); | |
| describe('Philosophers and Their Unlikely Assertions', () => { | |
| describe('Socrates', () => { | |
| it('should know that he knows nothing', async () => { | |
| const url = 'https://socratic.com/paradox/knowledge'; | |
| const result = await fetch(url).then(x => x.text()); | |
| assert(!result, 'Socrates claims to know something!'); | |
| }); | |
| }); | |
| describe('Descartes', () => { | |
| it('should think, therefore he is', () => { | |
| const thinking = true; | |
| assert(thinking === true, 'Descartes is not thinking?'); | |
| }); | |
| }); | |
| }); | |
| run(); | |
| */ | |
| const A_DOUBLE_LINE = '========================================'; | |
| const A_SINGLE_LINE = '----------------------------------------'; | |
| const root = { | |
| name: 'root', | |
| tests: [], | |
| children: [], | |
| }; | |
| const stack = [root]; | |
| function create(name) { | |
| return { | |
| name, | |
| tests: [], | |
| children: [], | |
| failures: 0, | |
| }; | |
| } | |
| function push(context) { | |
| stack[stack.length - 1].children.push(context); | |
| stack.push(context); | |
| } | |
| function pop() { | |
| stack.pop(); | |
| } | |
| function currentContext() { | |
| return stack[stack.length - 1]; | |
| } | |
| async function runContext(context) { | |
| let failures = 0; | |
| console.log(A_DOUBLE_LINE); | |
| console.log(`${context.name}`); | |
| for (const test of context.tests) { | |
| console.log(A_SINGLE_LINE); | |
| console.log(`${test.name}`); | |
| try { | |
| await test.fn(); | |
| } catch (error) { | |
| console.error(error); | |
| failures++; | |
| } | |
| } | |
| for (const child of context.children) { | |
| failures += await runContext(child); | |
| } | |
| context.failures = failures; | |
| return failures; | |
| } | |
| async function describe(name, fn) { | |
| const context = create(name); | |
| push(context); | |
| await fn(); | |
| pop(); | |
| } | |
| async function it(name, fn) { | |
| const context = currentContext(); | |
| context.tests.push({ name, fn }); | |
| } | |
| async function run() { | |
| let current = root; | |
| await runContext(current); | |
| console.log(); | |
| console.log(A_SINGLE_LINE); | |
| console.log(`Failures: ${current.failures}`); | |
| console.log(A_SINGLE_LINE); | |
| } | |
| function assert(test, msg = 'Assertion failed') { | |
| if (!test) { | |
| throw new Error(msg); | |
| } | |
| } | |
| module.exports = { | |
| describe, | |
| it, | |
| run, | |
| assert, | |
| }; |
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