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
63 lines
2.8 KiB
JavaScript
63 lines
2.8 KiB
JavaScript
const assert = require('assert')
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const math = require('../../../src/main')
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const permutations = math.permutations
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describe('permutations', function () {
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it('should calculate the permutations of a number', function () {
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assert.strictEqual(permutations(0), 1)
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assert.strictEqual(permutations(1), 1)
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assert.strictEqual(permutations(2), 2)
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assert.strictEqual(permutations(3), 6)
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assert.strictEqual(permutations(4), 24)
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assert.strictEqual(permutations(5), 120)
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})
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it('should calculate the permutations of a BigNumber', function () {
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assert.deepStrictEqual(permutations(math.bignumber(4)), math.bignumber(24))
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assert.deepStrictEqual(permutations(math.bignumber(5)), math.bignumber(120))
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assert.deepStrictEqual(permutations(math.bignumber(8)), math.bignumber(40320))
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})
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it('should calculate the permutations of a BigNumber, taking k at a time', function () {
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assert.deepStrictEqual(permutations(math.bignumber(5), math.bignumber(4)), math.bignumber(120))
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assert.deepStrictEqual(permutations(math.bignumber(6), math.bignumber(3)), math.bignumber(120))
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assert.deepStrictEqual(permutations(math.bignumber(9), math.bignumber(8)), math.bignumber(362880))
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})
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it('should calculate the permutations of a number, taking k at a time', function () {
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assert.strictEqual(permutations(5, 4), 120)
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assert.strictEqual(permutations(9, 8), 362880)
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assert.strictEqual(permutations(7, 5), 2520)
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})
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it('should fail loudly when k is larger than x', function () {
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assert.throws(function () { permutations(5, 6) }, TypeError)
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assert.throws(function () { permutations(math.bignumber(5), math.bignumber(6)) }, TypeError)
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})
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it('should not accept negative or non-integer arguments', function () {
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assert.throws(function () { permutations(12, -6) }, TypeError)
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assert.throws(function () { permutations(-12, 6) }, TypeError)
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assert.throws(function () { permutations(4.5, 2) }, TypeError)
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assert.throws(function () { permutations(4, 0.5) }, TypeError)
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assert.throws(function () { permutations(math.bignumber(-12), -6) }, TypeError)
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assert.throws(function () { permutations(math.bignumber(12.5), math.bignumber(6)) }, TypeError)
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assert.throws(function () { permutations(math.bignumber(12.5), math.pi) }, TypeError)
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})
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it('should not accept more than two arguments', function () {
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assert.throws(function () { permutations(12, 6, 13) })
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assert.throws(function () { permutations(-12, 6, 13) })
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})
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it('should not accept arguments of the wrong type', function () {
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assert.throws(function () { permutations('baa baa black sheep', true) })
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assert.throws(function () { permutations(new Array(12)) })
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})
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it('should LaTeX permutations', function () {
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const expression = math.parse('permutations(2)')
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assert.strictEqual(expression.toTex(), '\\mathrm{permutations}\\left(2\\right)')
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})
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})
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