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84 lines
3.3 KiB
JavaScript
84 lines
3.3 KiB
JavaScript
// test rightArithShift
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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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rightArithShift = math.rightArithShift;
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describe('rightArithShift', function () {
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it('should right arithmetically shift a number by a given amount', function () {
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assert.equal(rightArithShift(0, 1000), 0);
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assert.equal(rightArithShift(2, 0), 2);
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assert.equal(rightArithShift(12, 3), 1);
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assert.equal(rightArithShift(32, 4), 2);
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assert.equal(rightArithShift(-1, 1000), -1);
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assert.equal(rightArithShift(-12, 2), -3);
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assert.equal(rightArithShift(122, 3), 15);
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assert.equal(rightArithShift(-13, 2), -4);
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assert.equal(rightArithShift(-13, 3), -2);
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});
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it('should right arithmetically shift booleans by a boolean amount', function () {
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assert.equal(rightArithShift(true, true), 0);
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assert.equal(rightArithShift(true, false), 1);
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assert.equal(rightArithShift(false, true), 0);
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assert.equal(rightArithShift(false, false), 0);
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});
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it('should right arithmetically shift with a mix of numbers and booleans', function () {
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assert.equal(rightArithShift(2, true), 1);
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assert.equal(rightArithShift(2, false), 2);
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assert.equal(rightArithShift(true, 0), 1);
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assert.equal(rightArithShift(true, 1), 0);
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assert.equal(rightArithShift(false, 2), 0);
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});
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it('should right arithmetically shift numbers and null', function () {
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assert.equal(rightArithShift(1, null), 1);
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assert.equal(rightArithShift(null, 1), 0);
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});
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it('should right arithmetically shift by values given by strings', function () {
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assert.equal(rightArithShift('0', '1000'), 0);
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assert.equal(rightArithShift('2', 0), 2);
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assert.equal(rightArithShift(22, '3'), 2);
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assert.equal(rightArithShift('-256', 2), -64);
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assert.equal(rightArithShift('-256', '1e2'), -16);
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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 () {rightArithShift(math.unit('5cm'), 2)}, error.UnsupportedTypeError);
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assert.throws(function () {rightArithShift(2, math.unit('5cm'))}, error.UnsupportedTypeError);
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assert.throws(function () {rightArithShift(math.unit('2cm'), math.unit('5cm'))}, error.UnsupportedTypeError);
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});
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it('should element-wise right arithmetically shift a matrix', function () {
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var a = math.matrix([4,8]);
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var b = rightArithShift(a, 2);
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assert.ok(b instanceof math.type.Matrix);
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assert.deepEqual(b, math.matrix([1,2]));
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a = math.matrix([[4,8],[12,16]]);
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b = rightArithShift(a, 2);
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assert.ok(b instanceof math.type.Matrix);
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assert.deepEqual(b, math.matrix([[1,2],[3,4]]));
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});
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it('should element-wise right arithmetically shift an array', function () {
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var a = [[4,8],[12,16]];
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assert.deepEqual(rightArithShift(a[0], 0), a[0]);
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assert.deepEqual(rightArithShift(a[0], 2), [1,2]);
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assert.deepEqual(rightArithShift(a, 0), a);
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assert.deepEqual(rightArithShift(a, 2), [[1,2],[3,4]]);
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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 () {rightArithShift(1)}, error.ArgumentsError);
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assert.throws(function () {rightArithShift(1, 2, 3)}, error.ArgumentsError);
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});
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});
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