mirror of
https://github.com/josdejong/mathjs.git
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c5971b371a
* chore(package): update standard to version 12.0.0
* update to new lint version with --fix
I believe this mainly adds whitespace to `{}`'s.
* Replace assert.equal with assert.strictEqual
This breaks a lot of tests which I will endevour to fix in the next
commits.
* Fix most errors due to assert.strictEquals
Some instances of `strictEquals` are replaced by `deepEquals`.
`toString` has been used to make some string comparisions explicit.
Tests will still fail untill #1236 and #1237 are fixed.
* Fix assertion erros due to -0
With node 10, assert.strictEqual no longer considers `0 === -0`.
I missed these first time round as I was using node 8.
* Put toString correct side of bracket
I was converting the constructor to a string rather
than the result of the computation. Oops.
* Fixed #1236: quantileSeq has inconsistant return
* Update package-lock
* Fixed #1237: norm sometimes returning a complex number instead of number
* Fix cli tests
* More changes for standardjs, and fixes in unit tests
94 lines
3.5 KiB
JavaScript
94 lines
3.5 KiB
JavaScript
const assert = require('assert')
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const math = require('../../../src/main')
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const approx = require('../../../tools/approx')
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const pi = math.pi
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const complex = math.complex
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const matrix = math.matrix
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const unit = math.unit
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const tan = math.tan
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const piBigmath = math.create({ number: 'BigNumber', precision: 21 })
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const bigmath = math.create({ precision: 20 })
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const Big = bigmath.bignumber
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const bigTan = bigmath.tan
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describe('tan', function () {
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it('should return the tangent of a boolean', function () {
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approx.equal(tan(true), 1.55740772465490)
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approx.equal(tan(false), 0)
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})
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it('should return the tangent of a number', function () {
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approx.equal(tan(0), 0)
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approx.equal(tan(pi * 1 / 4), 1)
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approx.equal(tan(pi * 1 / 8), 0.414213562373095)
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assert.ok(tan(pi * 2 / 4) > 1e10)
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approx.equal(tan(pi * 3 / 4), -1)
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approx.equal(tan(pi * 4 / 4), 0)
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approx.equal(tan(pi * 5 / 4), 1)
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assert.ok(tan(pi * 6 / 4) > 1e10)
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approx.equal(tan(pi * 7 / 4), -1)
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approx.equal(tan(pi * 8 / 4), 0)
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})
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it('should return the tangent of a bignumber', function () {
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const bigPi = piBigmath.pi
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assert.deepStrictEqual(bigTan(Big(0)), Big(0))
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assert.deepStrictEqual(bigTan(Big(-1)), Big('-1.5574077246549022305'))
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assert.deepStrictEqual(bigTan(bigPi.div(8)).toString(), '0.414213562373095048802')
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// Wolfram: 0.414213562373095048801688724209698078569671875376948073176
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assert.deepStrictEqual(bigTan(bigPi.div(4)).toString(), '0.999999999999999999999')
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})
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it('should return the tangent of a complex number', function () {
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const re = 0.00376402564150425
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const im = 1.00323862735360980
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approx.deepEqual(tan(complex('2+3i')), complex(-re, im))
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approx.deepEqual(tan(complex('2-3i')), complex(-re, -im))
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approx.deepEqual(tan(complex('-2+3i')), complex(re, im))
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approx.deepEqual(tan(complex('-2-3i')), complex(re, -im))
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approx.deepEqual(tan(complex('i')), complex(0, 0.761594155955765))
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approx.deepEqual(tan(complex('1')), complex(1.55740772465490, 0))
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approx.deepEqual(tan(complex('1+i')), complex(0.271752585319512, 1.083923327338695))
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})
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it('should return the tangent of an angle', function () {
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approx.equal(tan(unit(' 60deg')), math.sqrt(3))
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approx.equal(tan(unit('-135deg')), 1)
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assert(math.type.isBigNumber(tan(unit(math.bignumber(60), 'deg'))))
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approx.equal(tan(unit(math.bignumber(60), 'deg')).toNumber(), math.sqrt(3))
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approx.deepEqual(tan(unit(complex('1+i'), 'rad')), complex(0.271752585319512, 1.083923327338695))
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})
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it('should throw an error if called with an invalid unit', function () {
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assert.throws(function () { tan(unit('5 celsius')) })
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})
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it('should throw an error if called with a string', function () {
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assert.throws(function () { tan('string') })
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})
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const tan123 = [1.557407724654902, -2.185039863261519, -0.142546543074278]
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it('should return the tan of each element of an array', function () {
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approx.deepEqual(tan([1, 2, 3]), tan123)
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})
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it('should return the tan of each element of a matrix', function () {
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approx.deepEqual(tan(matrix([1, 2, 3])), matrix(tan123))
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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 () { tan() }, /TypeError: Too few arguments/)
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assert.throws(function () { tan(1, 2) }, /TypeError: Too many arguments/)
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})
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it('should LaTeX tan', function () {
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const expression = math.parse('tan(1)')
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assert.strictEqual(expression.toTex(), '\\tan\\left(1\\right)')
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})
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})
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