mirror of
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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
42 lines
2.1 KiB
JavaScript
42 lines
2.1 KiB
JavaScript
const assert = require('assert')
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const math = require('../../../src/main')
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const combinations = math.combinations
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describe('combinations', function () {
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it('should calculate the combinations of a number taking k at a time', function () {
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assert.strictEqual(combinations(0, 0), 1)
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assert.strictEqual(combinations(7, 5), 21)
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assert.strictEqual(combinations(20, 15), 15504)
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assert.strictEqual(combinations(63, 7), 553270671)
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assert.strictEqual(combinations(25, 6), 177100)
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})
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it('should calculate the combinations of n items taken k at a time with BigNumbers', function () {
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assert.deepStrictEqual(combinations(math.bignumber(7), math.bignumber(5)), math.bignumber(21))
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assert.deepStrictEqual(combinations(math.bignumber(20), math.bignumber(15)), math.bignumber(15504))
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assert.deepStrictEqual(combinations(math.bignumber(63), math.bignumber(7)), math.bignumber(553270671))
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assert.deepStrictEqual(combinations(math.bignumber(25), math.bignumber(6)), math.bignumber(177100))
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})
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it('should not work with non-integer and negative input', function () {
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assert.throws(function () { combinations(-12, 6) }, TypeError)
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assert.throws(function () { combinations(12, -6) }, TypeError)
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assert.throws(function () { combinations(0.5, 3) }, TypeError)
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assert.throws(function () { combinations(4, 0.5) }, TypeError)
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assert.throws(function () { combinations(3, 5) }, TypeError)
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assert.throws(function () { combinations(math.bignumber(3), math.bignumber(5)) }, TypeError)
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assert.throws(function () { combinations(math.bignumber(3.5), math.bignumber(-3)) }, TypeError)
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assert.throws(function () { combinations(math.bignumber(3.5), 1 / 3) }, TypeError)
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})
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it('should not work with the wrong number or type of arguments', function () {
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assert.throws(function () { combinations(5, 3, 2) })
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assert.throws(function () { combinations(true, 'hello world') })
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})
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it('should LaTeX combinations', function () {
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const expression = math.parse('combinations(3,2)')
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assert.strictEqual(expression.toTex(), '\\binom{3}{2}')
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})
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})
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