test: add self-tests for row echelon algorithm

Maths/test/RowEchelon.test.js

@@ -0,0 +1,84 @@
+import { rowEchelon } from '../RowEchelon'
+describe('Determinant', () => {
+ const testCases = [
+ [
+ [
+ [8, 1, 3, 5],
+ [4, 6, 8, 2],
+ [3, 5, 6, 8]
+ ],
+ [
+ [1, 0.125, 0.375, 0.625],
+ [0, 1, 1.18182, -0.09091],
+ [0, 0, 1, -11.0769]
+ ]
+ ],
+ [
+ [
+ [6, 8, 1, 3, 5],
+ [1, 4, 6, 8, 2],
+ [0, 3, 5, 6, 8],
+ [2, 5, 9, 7, 8],
+ [5, 5, 7, 0, 1]
+ ],
+ [
+ [1, 1.33333, 0.16667, 0.5, 0.83333],
+ [0, 1, 2.1875, 2.8125, 0.4375],
+ [0, 0, 1, 1.56, -4.28003],
+ [0, 0, 0, 1, -3.3595],
+ [0, 0, 0, 0, 1]
+ ]
+ ],
+ [
+ [
+ [1, 3, 5],
+ [6, 8, 2],
+ [5, 6, 8],
+ [7, 9, 9],
+ [5, 0, 6]
+ ],
+ [
+ [1, 3, 5],
+ [0, 1, 2.8],
+ [0, 0, 1],
+ [0, 0, 0],
+ [0, 0, 0]
+ ]
+ ],
+ [
+ [
+ [8, 1, 3, 5],
+ [4, 6, 8, 2, 7],
+ [3, 5, 6, 8]
+ ],
+ 'Input is not a valid 2D matrix.'
+ ],
+ [
+ [
+ [0, 7, 8, 1, 3, 5],
+ [0, 6, 4, 6, 8, 2],
+ [0, 7, 3, 5, 6, 8],
+ [6, 8, 1, 0, 0, 4],
+ [3, 3, 5, 7, 3, 1],
+ [1, 2, 1, 0, 9, 7],
+ [8, 8, 0, 2, 3, 1]
+ ],
+ [
+ [1, 1.33333, 0.16667, 0, 0, 0.66667],
+ [0, 1, 0.66667, 1, 1.33333, 0.33333],
+ [0, 0, 1, 1.2, 1.99999, -3.4],
+ [0, 0, 0, 1, 1.3, -1.4],
+ [0, 0, 0, 0, 1, -2.32854],
+ [0, 0, 0, 0, 0, 1],
+ [0, 0, 0, 0, 0, 0]
+ ]
+ ]
+ ]
+
+ test.each(testCases)(
+ 'Should return the matrix in row echelon form.',
+ (matrix, expected) => {
+ expect(rowEchelon(matrix)).toEqual(expected)
+ }
+ )
+})