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
118 lines
4.5 KiB
JavaScript
118 lines
4.5 KiB
JavaScript
const assert = require('assert')
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const approx = require('../../../tools/approx')
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const math = require('../../../src/main')
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const BigNumber = math.type.BigNumber
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const Complex = math.type.Complex
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const DenseMatrix = math.type.DenseMatrix
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const Unit = math.type.Unit
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const median = math.median
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describe('median', function () {
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it('should return the median of an even number of numbers', function () {
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assert.strictEqual(median(3, 1), 2)
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assert.strictEqual(median(1, 3), 2)
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approx.equal(median(1, 3, 5, 2), 2.5)
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assert.strictEqual(median(0, 0, 0, 0), 0)
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})
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it('should return the median of an odd number of numbers', function () {
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assert.strictEqual(median(0), 0)
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assert.strictEqual(median(5), 5)
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approx.equal(median(1, 3, 5, 2, -1), 2)
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assert.strictEqual(median(0, 0, 0), 0)
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})
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it('should return the median of an even number of new BigNumbers', function () {
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assert.deepStrictEqual(median(new BigNumber(1), new BigNumber(4), new BigNumber(5), new BigNumber(2)),
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new BigNumber(3))
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})
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it('should return the median of an odd number of new BigNumbers', function () {
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assert.deepStrictEqual(median(new BigNumber(1), new BigNumber(4), new BigNumber(2)),
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new BigNumber(2))
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})
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it('should return the median of an even number of booleans', function () {
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assert.strictEqual(median(true, true, false, false), 0.5)
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})
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it('should return the median of an odd number of booleans', function () {
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assert.strictEqual(median(true, true, false), 1)
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})
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it('should return the median from an array', function () {
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assert.strictEqual(median([1, 3, 5, 2, -5]), 2)
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})
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it('should return the median of units', function () {
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assert.deepStrictEqual(median([new Unit(5, 'mm'), new Unit(15, 'mm'), new Unit(10, 'mm')]), new Unit(10, 'mm'))
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assert.deepStrictEqual(median([new Unit(5, 'mm'), new Unit(30, 'mm'), new Unit(20, 'mm'), new Unit(10, 'mm')]), new Unit(15, 'mm'))
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})
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it('should return the median from an 1d matrix', function () {
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assert.strictEqual(median(new DenseMatrix([1, 3, 5, 2, -5])), 2)
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})
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it('should return the median from a 2d array', function () {
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approx.equal(median([
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[1, 4, 7],
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[3, 0, 5]
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]), 3.5)
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})
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it('should return the median from a 2d matrix', function () {
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approx.equal(median(new DenseMatrix([
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[1, 4, 7],
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[3, 0, 5]
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])), 3.5)
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})
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it('should return NaN if any of the inputs contains NaN', function () {
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assert(isNaN(median([NaN])))
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assert(isNaN(median([1, NaN])))
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assert(isNaN(median([NaN, 1])))
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assert(isNaN(median([1, 3, NaN])))
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assert(isNaN(median([NaN, NaN, NaN])))
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assert(isNaN(median(NaN, NaN, NaN)))
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})
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it('should throw an error if called with invalid number of arguments', function () {
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assert.throws(function () { median() })
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assert.throws(function () { median([], 2, 3) })
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})
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it('should throw an error when called multiple arrays or matrices', function () {
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assert.throws(function () { median([1, 2], [3, 4]) }, /Scalar values expected/)
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assert.throws(function () { median(math.matrix([1, 2]), math.matrix([3, 4])) }, /Scalar values expected/)
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})
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it('should throw an error if called with not yet supported argument dim', function () {
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assert.throws(function () { median([], 2) }, /not yet supported/)
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})
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it('should throw an error if called with invalid type of arguments', function () {
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assert.throws(function () { median(2, new Complex(2, 5)) }, /TypeError: Cannot calculate median, no ordering relation is defined for complex numbers/)
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assert.throws(function () { median(new Complex(2, 3), new Complex(2, 1)) }, /TypeError: Cannot calculate median, no ordering relation is defined for complex numbers/)
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assert.throws(function () { median([[2, undefined, 4]]) }, /TypeError: Cannot calculate median, unexpected type of argument/)
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assert.throws(function () { median([[2, new Date(), 4]]) }, /TypeError: Cannot calculate median, unexpected type of argument/)
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assert.throws(function () { median([2, null, 4]) }, /TypeError: Cannot calculate median, unexpected type of argument/)
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})
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it('should throw an error if called with an empty array', function () {
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assert.throws(function () { median([]) })
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})
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it('should not mutate the input', function () {
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const a = [3, 2, 1]
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const b = median(a)
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assert.deepStrictEqual(a, [3, 2, 1])
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assert.deepStrictEqual(b, 2)
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})
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it('should LaTeX median', function () {
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const expression = math.parse('median(1,2,3,4)')
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assert.strictEqual(expression.toTex(), '\\mathrm{median}\\left(1,2,3,4\\right)')
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})
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})
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