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
108 lines
4.9 KiB
JavaScript
108 lines
4.9 KiB
JavaScript
// test log1p
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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 mathPredictable = math.create({ predictable: true })
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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 log1p = math.log1p
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describe('log1p', function () {
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it('should return the log1p of a boolean value', function () {
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approx.equal(log1p(true), 0.6931471805599)
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assert.strictEqual(log1p(false), 0)
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assert.strictEqual(log1p(1, false), -0)
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})
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it('should return the log1p of positive numbers', function () {
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assert.strictEqual(log1p(-1), -Infinity)
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assert.strictEqual(log1p(-0), -0)
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assert.strictEqual(log1p(+0), +0)
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approx.deepEqual(log1p(1), 0.693147180559945)
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approx.deepEqual(log1p(2), 1.098612288668110)
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approx.deepEqual(math.exp(log1p(99)), 100)
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})
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it('should return the log1p of negative numbers', function () {
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approx.deepEqual(log1p(-2), complex('0.000000000000000 + 3.141592653589793i'))
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approx.deepEqual(log1p(-3), complex('0.693147180559945 + 3.141592653589793i'))
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approx.deepEqual(log1p(-4), complex('1.098612288668110 + 3.141592653589793i'))
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})
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it('should return the log1p of negative numbers with predictable: true', function () {
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assert.strictEqual(typeof mathPredictable.log1p(-2), 'number')
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assert(isNaN(mathPredictable.log1p(-2)))
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})
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it('should return the log1p base N of a number', function () {
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approx.deepEqual(log1p(99, 10), 2)
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approx.deepEqual(log1p(999, 10), 3)
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approx.deepEqual(log1p(7, 2), 3)
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approx.deepEqual(log1p(15, 2), 4)
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})
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it('should throw an error if invalid number of arguments', function () {
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assert.throws(function () { log1p() }, /TypeError: Too few arguments in function log1p \(expected: any, index: 0\)/)
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assert.throws(function () { log1p(1, 2, 3) }, /TypeError: Too many arguments in function log1p \(expected: 2, actual: 3\)/)
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})
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it('should return the log1p of positive bignumbers', function () {
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const bigmath = math.create({ precision: 100 })
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assert.deepStrictEqual(bigmath.log1p(bigmath.bignumber(-1)).toString(), '-Infinity')
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assert.deepStrictEqual(bigmath.log1p(bigmath.bignumber(0)), bigmath.bignumber('0'))
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assert.deepStrictEqual(bigmath.log1p(bigmath.bignumber(1)), bigmath.bignumber('0.6931471805599453094172321214581765680755001343602552541206800094933936219696947156058633269964186875'))
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assert.deepStrictEqual(bigmath.log1p(bigmath.bignumber(2)), bigmath.bignumber('1.098612288668109691395245236922525704647490557822749451734694333637494293218608966873615754813732089'))
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// note: the following gives a round-off error with regular numbers
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assert.deepStrictEqual(bigmath.log1p(bigmath.bignumber(999), bigmath.bignumber(10)), bigmath.bignumber(3))
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})
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it('should return the log1p of negative bignumbers', function () {
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const bigmath = math.create({ precision: 100 })
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approx.deepEqual(bigmath.log1p(bigmath.bignumber(-2)), complex('0.000000000000000 + 3.141592653589793i'))
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approx.deepEqual(bigmath.log1p(bigmath.bignumber(-3)), complex('0.693147180559945 + 3.141592653589793i'))
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approx.deepEqual(bigmath.log1p(bigmath.bignumber(-4)), complex('1.098612288668110 + 3.141592653589793i'))
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})
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it('should return the log1p of negative bignumbers with predictable:true', function () {
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assert(mathPredictable.log1p(math.bignumber(-2)).isNaN(), 'should be NaN')
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})
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it('should return the log1p of a complex number', function () {
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approx.deepEqual(log1p(math.i), complex('0.346573590279973 + 0.785398163397448i'))
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approx.deepEqual(log1p(complex(0, -1)), complex('0.346573590279973 - 0.785398163397448i'))
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approx.deepEqual(log1p(complex(1, 1)), complex('0.80471895621705 + 0.463647609000806i'))
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approx.deepEqual(log1p(complex(1, -1)), complex('0.80471895621705 - 0.463647609000806i'))
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approx.deepEqual(log1p(complex(-1, -1)), complex('-1.570796326794897i'))
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approx.deepEqual(log1p(complex(-1, 1)), complex('1.570796326794897i'))
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approx.deepEqual(log1p(complex(1, 0)), complex('0.693147180559945'))
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})
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it('should throw an error when used on a unit', function () {
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assert.throws(function () { log1p(unit('5cm')) })
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})
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it('should throw an error when used on a string', function () {
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assert.throws(function () { log1p('text') })
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})
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it('should return the log1p of each element of a matrix', function () {
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const res = [0, 0.693147180559945, 1.098612288668110, 1.386294361119891]
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approx.deepEqual(log1p([0, 1, 2, 3]), res)
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approx.deepEqual(log1p(matrix([0, 1, 2, 3])), matrix(res))
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approx.deepEqual(log1p(matrix([[0, 1], [2, 3]])),
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matrix([[0, 0.693147180559945], [1.098612288668110, 1.386294361119891]]))
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})
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it('should LaTeX log1p', function () {
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const expr1 = math.parse('log1p(e)')
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const expr2 = math.parse('log1p(32,2)')
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assert.strictEqual(expr1.toTex(), '\\ln\\left( e+1\\right)')
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assert.strictEqual(expr2.toTex(), '\\log_{2}\\left(32+1\\right)')
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})
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})
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