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65 lines
2.6 KiB
JavaScript
65 lines
2.6 KiB
JavaScript
// test unary minus
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var assert = require('assert'),
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math = require('../../../index'),
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error = require('../../../lib/error/index'),
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bignumber = math.bignumber;
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describe('unaryMinus', function() {
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it('should return unary minus of a boolean', function () {
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assert.equal(math.unaryMinus(true), -1);
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assert.equal(math.unaryMinus(false), 0);
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});
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// TODO: unary minus should return bignumber on boolean input when configured for bignumber
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it.skip('should return bignumber unary minus of a boolean', function () {
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var bigmath = math.create({number: 'bignumber'});
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assert.deepEqual(bigmath.unaryMinus(true), bigmath.bignumber(-1));
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assert.deepEqual(bigmath.unaryMinus(false), bigmath.bignumber(0));
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});
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it('should return unary minus of null', function () {
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assert.equal(math.unaryMinus(null), 0);
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});
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it('should perform unary minus of a number', function() {
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assert.deepEqual(math.unaryMinus(2), -2);
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assert.deepEqual(math.unaryMinus(-2), 2);
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assert.deepEqual(math.unaryMinus(0), 0);
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});
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it('should perform unary minus of a big number', function() {
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assert.deepEqual(math.unaryMinus(bignumber(2)), bignumber(-2));
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assert.deepEqual(math.unaryMinus(bignumber(-2)), bignumber(2));
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assert.deepEqual(math.unaryMinus(bignumber(0)).valueOf(), bignumber(0).valueOf());
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});
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it('should perform unary minus of a complex number', function() {
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assert.equal(math.unaryMinus(math.complex(3, 2)), '-3 - 2i');
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assert.equal(math.unaryMinus(math.complex(3, -2)), '-3 + 2i');
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assert.equal(math.unaryMinus(math.complex(-3, 2)), '3 - 2i');
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assert.equal(math.unaryMinus(math.complex(-3, -2)), '3 + 2i');
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});
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it('should perform unary minus of a unit', function() {
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assert.equal(math.unaryMinus(math.unit(5, 'km')).toString(), '-5 km');
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});
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it('should perform element-wise unary minus on a matrix', function() {
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a2 = math.matrix([[1,2],[3,4]]);
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var a7 = math.unaryMinus(a2);
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assert.ok(a7 instanceof math.type.Matrix);
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assert.deepEqual(a7.size(), [2,2]);
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assert.deepEqual(a7.valueOf(), [[-1,-2],[-3,-4]]);
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assert.deepEqual(math.unaryMinus([[1,2],[3,4]]), [[-1,-2],[-3,-4]]);
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});
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it('should throw an error in case of invalid number of arguments', function() {
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assert.throws(function () {math.unaryMinus()}, /TypeError: Too few arguments/);
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assert.throws(function () {math.unaryMinus(1, 2)}, /TypeError: Too many arguments/);
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});
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it('should throw an error in case of invalid type of argument', function() {
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assert.throws(function () {math.unaryMinus(new Date())}, /TypeError: Unexpected type of argument/);
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});
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}); |