just/test/number-modulo/index.js at tape5 · hmmhmmhm/just

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var test = require('../util/test')(__filename);

var modulo = require('../../packages/number-modulo');

test('positive numbers do simple remainder', function(t) {

t.plan(3);

t.equal(modulo(7, 5), 2);

t.equal(modulo(17, 23), 17);

t.equal(modulo(5.8, 3.4), 2.4);

t.end();

});

test('zero divisor returns number', function(t) {

t.plan(2);

t.equal(modulo(7, 0), 7);

t.equal(modulo(-17, 0), -17);

t.end();

});

test('negative numbers recursively add divisor until >= number', function(t) {

t.plan(3);

t.equal(modulo(-7, 5), 3);

t.equal(modulo(-2, 15), 13);

t.equal(modulo(-5.8, 3.4), 1);

t.end();

});

test('negative divisor returns NaN', function(t) {

t.plan(2);

t.ok(isNaN(modulo(12, -1)));

t.ok(isNaN(modulo(-3, -8)));

t.end();

});

test('non-numeric number or divisor returns NaN', function(t) {

t.plan(3);

t.ok(isNaN(modulo(12, 'apple')));

t.ok(isNaN(modulo('bee', 9)));

t.ok(isNaN(modulo(null, undefined)));

t.end();

});