import gauss from './gauss'

describe("gauss", function() {

    it("4x = 8", function() {
        const A = [[4]]
        const b = [8]
        const result = gauss(A, b)
        expect(result.length).toBe(1)
        expect(result[0]).toBe(2)
    })

    it("x + y = 10, 2x + y = 16", function() {
        const A = [[1, 1], [2, 1]]
        const b = [10, 16]
        const result = gauss(A, b)
        expect(result.length).toBe(2)
        expect(result[0]).toBe(6)
        expect(result[1]).toBe(4)
    })

    it("x + y + z = 6, 2x + y + 2z = 10, x + 2y + 3z = 14", function() {
        const A = [[1, 1, 1], [2, 1, 2], [1, 2, 3]]
        const b = [6, 10, 14]
        const result = gauss(A, b)
        expect(result.length).toBe(3)
        expect(result[0]).toBe(1)
        expect(result[1]).toBe(2)
        expect(result[2]).toBe(3)
    })

})