@working-sloth/data-matrix NPM

Data Matrix

DataMatrix

日本語

Diligent developer, is it your work to crete many lengthy code for unit tests? Let's be lazy.

What?

Data list creator for JavaScript and TypeScript.

Why?

Less code: you don't have to write lengthy code any more for unit test
Readable: less code helps you to understand test cases and find mistake
Learning cost: basic takes only 1 step, full function takes 5 only steps to learn

Quick start

import { buildDataMatrix } from '@working-sloth/data-matrix';

// define test param
type Test = { time: string, isMale: boolean; age: number, expect: number, label: string };
// buildDataMatrix<T> convert the matrix to test list
const tests = buildDataMatrix<Test>(
    [
        ['time',        'isMale',   'age',  'expect',   'label'] // Header
    ], [//-------------------------------------------------------
        // Lacking values will be filled from LEFT to RIGHT with previous value
        ['morning',     true,       10,     -0.5,   '[morning] boy (max): discount 50%'],
        [/*morning*/    /*true*/    11,     0.0,    '[morning] boy (above): no discount'],
        [                           64,     0.0,    '[morning] senior man (under): no discount'],
        [                           65,     -0.5,   '[morning] senior man (min): discount 50%'],
        [               false,      10,     -0.5,   '[morning] girl (max): discount 50%'],
        [               /*false*/   11,     0.0,    '[morning] girl (above): no discount'],
        ...
    ]
);

// Test loop
for (const test of tests) {
    it(test.label, () => {
        // Given
        const service = new FooService();
        // When
        const discount = service.calcDiscount(test.time, test.isMale, test.age);
        // Then
        expect(discount).toEqual(test.expect);
    });
}