test.js

const test = require( 'ava' );
const oneWise = require( '.' );

test( 'empty object returns an empty object in an array', t => {
    const r = oneWise( {} );
    t.deepEqual( r, [ {} ] );
} );

test( 'single property with two values returns one object for each value', t => {
    const r = oneWise( {
		"A": [ 1, 2 ]
	} );
    t.deepEqual( r, [
        { "A": 1 },
        { "A": 2 }
    ] );
} );

test( 'two properties, the second empty, returns only objects of the first property', t => {
    const r = oneWise( {
		"A": [ 1, 2 ],
		"B": []
	} );
    t.deepEqual( r, [
        { "A": 1 },
        { "A": 2 }
    ] );
} );

test( 'two properties, the second empty, returns only objects of the first property, even being arrays', t => {
    const r = oneWise( {
		"A": [ [ 1 ], [ 2 ] ],
		"B": []
	} );
    t.deepEqual( r, [
        { "A": [ 1 ] },
        { "A": [ 2 ] }
    ] );
} );

test( 'combination of 2 with lengths 2 and 1', t => {
    const fakeRandom = () => 0.1;
    const r = oneWise( {
		"A": [ 1, 2 ],
		"B": [ "x" ]
	}, fakeRandom );
    t.deepEqual( r, [
        { "A": 1, "B": "x" },
        { "A": 2, "B": "x" },
    ] );
} );

test( 'combination of 2 with lengths 2 and 3', t => {
    const fakeRandom = () => 0.1;
    const r = oneWise( {
		"A": [ 1, 2 ],
		"B": [ "x", "y", "z" ]
	}, fakeRandom );
    t.deepEqual( r, [
        { "A": 1, "B": "x" },
        { "A": 2, "B": "y" },
        { "A": 1, "B": "z" }
    ] );
} );

test( 'combination of 3 with lengths 2, 3, and 2', t => {
    const fakeRandom = () => 0.1;
    const r = oneWise(
		{
			"A": [ 1, 2 ],
			"B": [ "x", "y", "z" ],
			"C": [ "foo", "bar" ]
		},
		fakeRandom
	);
    t.deepEqual( r, [
        { "A": 1, "B": "x", "C": "foo" },
        { "A": 2, "B": "y", "C": "bar" },
		{ "A": 1, "B": "z", "C": "foo" },
    ] );
} );

test( 'combination of 3 with lengths 4, 3, 2', t => {
    const fakeRandom = () => 0.1;
    const r = oneWise( {
		"A": [ 1, 2, 3, 4 ],
		"B": [ "x", "y", "z" ],
		"C": [ "foo", "bar" ]
	}, fakeRandom );
    t.deepEqual( r, [
        { "A": 1, "B": "x", "C": "foo" },
        { "A": 2, "B": "y", "C": "bar" },
		{ "A": 3, "B": "z", "C": "foo" },
		{ "A": 4, "B": "x", "C": "foo" },
    ] );
} );

test( 'combination of 3 with lengths 4, 1, 0', t => {
    const fakeRandom = () => 0.1;
    const r = oneWise( {
		"A": [ 1, 2, 3, 4 ],
		"B": [ "x" ],
		"C": []
	}, fakeRandom );
    t.deepEqual( r, [
        { "A": 1, "B": "x" },
        { "A": 2, "B": "x" },
		{ "A": 3, "B": "x" },
		{ "A": 4, "B": "x" },
    ] );
} );