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101 lines
3.8 KiB
JavaScript
101 lines
3.8 KiB
JavaScript
// test leftShift
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var assert = require('assert'),
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approx = require('../../../tools/approx'),
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error = require('../../../lib/error/index'),
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math = require('../../../index'),
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//bignumber = math.bignumber,
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leftShift = math.leftShift;
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describe('leftShift', function () {
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it('should left shift a number by a given amount', function () {
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assert.equal(leftShift(0, 1000), 0);
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assert.equal(leftShift(2, 0), 2);
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assert.equal(leftShift(2, 3), 16);
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assert.equal(leftShift(2, 4), 32);
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assert.equal(leftShift(-2, 2), -8);
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assert.equal(leftShift(3, 3), 24);
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assert.equal(leftShift(-3, 2), -12);
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assert.equal(leftShift(-3, 3), -24);
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});
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it('should left shift booleans by a boolean amount', function () {
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assert.equal(leftShift(true, true), 2);
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assert.equal(leftShift(true, false), 1);
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assert.equal(leftShift(false, true), 0);
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assert.equal(leftShift(false, false), 0);
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});
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it('should left shift with a mix of numbers and booleans', function () {
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assert.equal(leftShift(2, true), 4);
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assert.equal(leftShift(2, false), 2);
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assert.equal(leftShift(true, 2), 4);
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assert.equal(leftShift(false, 2), 0);
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});
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it('should left shift numbers and null', function () {
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assert.equal(leftShift(1, null), 1);
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assert.equal(leftShift(null, 1), 0);
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});
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/*it('should left shift bignumbers', function () {
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assert.deepEqual(leftShift(bignumber(2), bignumber(3)), bignumber(16));
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assert.deepEqual(leftShift(bignumber(500), bignumber(100)), bignumber('633825300114114700748351602688000'));
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assert.deepEqual(leftShift(bignumber(-1), bignumber(2)), bignumber('-1'));
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});
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it('should left shift mixed numbers and bignumbers', function () {
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assert.deepEqual(leftShift(bignumber(2), 3), bignumber(16));
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assert.deepEqual(leftShift(2, bignumber(3)), bignumber(16));
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approx.equal(leftShift(-1, bignumber(2)), bignumber(-4));
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approx.equal(leftShift(bignumber(-1), 2), bignumber(-4));
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});
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it('should left shift mixed booleans and bignumbers', function () {
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assert.deepEqual(leftShift(true, bignumber(3)), bignumber(8));
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assert.deepEqual(leftShift(false, bignumber(3)), bignumber(0));
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assert.deepEqual(leftShift(bignumber(3), false), bignumber(3));
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assert.deepEqual(leftShift(bignumber(3), true), bignumber(6));
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});*/
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it('should throw an error if used with a unit', function() {
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assert.throws(function () {leftShift(math.unit('5cm'), 2)}, error.UnsupportedTypeError);
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assert.throws(function () {leftShift(2, math.unit('5cm'))}, error.UnsupportedTypeError);
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assert.throws(function () {leftShift(math.unit('2cm'), math.unit('5cm'))}, error.UnsupportedTypeError);
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});
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it('should left shift by values given by strings', function () {
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assert.equal(leftShift('0', '1000'), 0);
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assert.equal(leftShift('2', 0), 2);
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assert.equal(leftShift(2, '3'), 16);
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assert.equal(leftShift('-2', 2), -8);
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});
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it('should element-wise left shift a matrix', function () {
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var a = math.matrix([1,2]);
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var b = leftShift(a, 2);
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assert.ok(b instanceof math.type.Matrix);
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assert.deepEqual(b, math.matrix([4,8]));
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a = math.matrix([[1,2],[3,4]]);
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b = leftShift(a, 2);
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assert.ok(b instanceof math.type.Matrix);
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assert.deepEqual(b, math.matrix([[4,8],[12,16]]));
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});
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it('should element-wise left shift an array', function () {
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var a = [[1,2],[3,4]];
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assert.deepEqual(leftShift(a[0], 0), a[0]);
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assert.deepEqual(leftShift(a[0], 2), [4,8]);
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assert.deepEqual(leftShift(a, 0), a);
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assert.deepEqual(leftShift(a, 2), [[4,8],[12,16]]);
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});
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it('should throw an error if used with wrong number of arguments', function () {
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assert.throws(function () {leftShift(1)}, error.ArgumentsError);
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assert.throws(function () {leftShift(1, 2, 3)}, error.ArgumentsError);
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});
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});
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