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44 lines
1.7 KiB
JavaScript
44 lines
1.7 KiB
JavaScript
import assert from 'assert'
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import math from '../../../../src/bundleAny'
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describe('re', function () {
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it('should return the real part of a complex number', function () {
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assert.strictEqual(math.re(math.complex(2, 3)), 2)
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assert.strictEqual(math.re(math.complex(-2, -3)), -2)
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assert.strictEqual(math.re(math.i), 0)
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})
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it('should return the real part of a real number', function () {
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assert.strictEqual(math.re(2), 2)
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})
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it('should return the real part of a big number', function () {
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assert.deepStrictEqual(math.re(math.bignumber(2)), math.bignumber(2))
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})
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it('should return the real part of a boolean', function () {
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assert.strictEqual(math.re(true), 1)
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assert.strictEqual(math.re(false), 0)
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})
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it('should return the real part for each element in a matrix', function () {
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assert.deepStrictEqual(math.re([2, math.complex('3-6i')]), [2, 3])
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assert.deepStrictEqual(math.re(math.matrix([2, math.complex('3-6i')])).valueOf(), [2, 3])
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})
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it('should throw an error when called with an unsupported type of argument', function () {
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assert.throws(function () { math.re(new Date()) }, /TypeError: Unexpected type of argument/)
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assert.throws(function () { math.re(math.unit('5cm')) }, /TypeError: Unexpected type of argument/)
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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.re() }, /TypeError: Too few arguments/)
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assert.throws(function () { math.re(1, 2) }, /TypeError: Too many arguments/)
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})
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it('should LaTeX re', function () {
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const expression = math.parse('re(1+i)')
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assert.strictEqual(expression.toTex(), '\\Re\\left\\lbrace1+ i\\right\\rbrace')
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})
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})
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