mirror of
https://github.com/josdejong/mathjs.git
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f79fec6db5
* fix toTex(): remove row delimiter on the last row * remove row delimiter on the last row (use map and join instead of forEach) * fix ArrayNode.toTex() unit tests incorrectly expecting a row delimiter on the last row * added toTex() tests for nested cases * fixed ArrayNode.toTex() for nested cases * removed redunant variable
53 lines
1.9 KiB
JavaScript
53 lines
1.9 KiB
JavaScript
import assert from 'assert'
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import math from '../../../../src/defaultInstance.js'
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const matrix = math.matrix
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const flatten = math.flatten
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describe('flatten', function () {
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it('should flatten an empty array', function () {
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assert.deepStrictEqual(flatten([]), [])
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})
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it('should clone the flattened array', function () {
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const c = math.complex()
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const flat = flatten([c])
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assert.deepStrictEqual(flat, [c])
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assert(c !== flat[0])
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})
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it('should flatten a 1 dimensional array', function () {
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assert.deepStrictEqual(flatten([1, 2, 3]), [1, 2, 3])
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})
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it('should flatten a 2 dimensional array', function () {
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assert.deepStrictEqual(flatten([[1, 2], [3, 4]]), [1, 2, 3, 4])
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})
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it('should flatten a 3 dimensional array', function () {
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assert.deepStrictEqual(flatten([[[1, 2], [3, 4]], [[5, 6], [7, 8]]]), [1, 2, 3, 4, 5, 6, 7, 8])
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})
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it('should flatten a 1 dimensional matrix', function () {
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assert.deepStrictEqual(flatten(matrix([1, 2, 3])), matrix([1, 2, 3]))
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})
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it('should flatten a 2 dimensional matrix', function () {
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assert.deepStrictEqual(flatten(matrix([[1, 2], [3, 4]])), matrix([1, 2, 3, 4]))
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})
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it('should flatten a 3 dimensional matrix', function () {
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assert.deepStrictEqual(flatten(matrix([[[1, 2], [3, 4]], [[5, 6], [7, 8]]])), matrix([1, 2, 3, 4, 5, 6, 7, 8]))
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})
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it('should throw an error on invalid arguments', function () {
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assert.throws(function () { flatten() }, /TypeError: Too few arguments/)
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assert.throws(function () { flatten([], 2) }, /TypeError: Too many arguments/)
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assert.throws(function () { flatten('str') }, /TypeError: Unexpected type of argument/)
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})
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it('should LaTeX flatten', function () {
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const expression = math.parse('flatten([[1,2],[3,4]])')
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assert.strictEqual(expression.toTex(), '\\mathrm{flatten}\\left(\\begin{bmatrix}1&2\\\\3&4\\end{bmatrix}\\right)')
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})
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})
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