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71 lines
2.5 KiB
JavaScript
71 lines
2.5 KiB
JavaScript
// test abs
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var assert = require('assert'),
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math = require('../../../index'),
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error = math.error;
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describe('abs', function () {
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it('should return the abs value of a boolean', function () {
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assert.strictEqual(math.abs(true), 1);
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assert.strictEqual(math.abs(false), 0);
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});
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it('should return the abs value of null', function () {
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assert.strictEqual(math.abs(null), 0);
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});
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it('should return the abs value of a number', function () {
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assert.strictEqual(math.abs(-4.2), 4.2);
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assert.strictEqual(math.abs(-3.5), 3.5);
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assert.strictEqual(math.abs(100), 100);
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assert.strictEqual(math.abs(0), 0);
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});
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it('should return the absolute value of a big number', function () {
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assert.deepEqual(math.abs(math.bignumber(-2.3)), math.bignumber(2.3));
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assert.deepEqual(math.abs(math.bignumber('5e500')), math.bignumber('5e500'));
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assert.deepEqual(math.abs(math.bignumber('-5e500')), math.bignumber('5e500'));
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});
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it('should return the absolute value of a complex number', function () {
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assert.equal(math.abs(math.complex(3, -4)), 5);
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assert.equal(math.abs(math.complex(1e200, -4e200)), 4.12310562561766e+200);
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});
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it('should return the absolute value of all elements in an Array', function () {
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var a1 = math.abs([1,-2,3]);
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assert.ok(Array.isArray(a1));
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assert.deepEqual(a1, [1,2,3]);
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a1 = math.abs([-2,-1,0,1,2]);
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assert.ok(Array.isArray(a1));
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assert.deepEqual(a1, [2,1,0,1,2]);
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});
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it('should return the absolute value of all elements in a matrix', function () {
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var a1 = math.abs(math.matrix([1,-2,3]));
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assert.ok(a1 instanceof math.type.Matrix);
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assert.deepEqual(a1.size(), [3]);
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assert.deepEqual(a1.valueOf(), [1,2,3]);
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a1 = math.abs(math.matrix([-2,-1,0,1,2]));
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assert.ok(a1 instanceof math.type.Matrix);
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assert.deepEqual(a1.size(), [5]);
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assert.deepEqual(a1.valueOf(), [2,1,0,1,2])
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});
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it('should throw an error with a measurment unit', function () {
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assert.throws(function () {
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math.abs(math.unit(5, 'km'));
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});
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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.abs()}, /TypeError: Too few arguments/);
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assert.throws(function () {math.abs(1, 2)}, /TypeError: Too many arguments/);
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});
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it('should throw an error in case of unsupported types', function () {
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assert.throws(function () {math.abs('a string');}, /TypeError: Unexpected type of argument/);
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assert.throws(function () {math.abs(undefined);}, /TypeError: Unexpected type of argument/);
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});
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});
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