public void MatricesMatrix_TotalColumnsTest() { Matrix m1 = new Matrix(1); Matrix m2 = new Matrix(2); Matrix m3 = new Matrix(3); Matrix m4 = new Matrix(4); MatricesMatrix testMatricesMatrix = new MatricesMatrix(2, 2); testMatricesMatrix.SetElement(0, 0, m1); testMatricesMatrix.SetElement(0, 1, m3); testMatricesMatrix.SetElement(1, 0, m2); testMatricesMatrix.SetElement(1, 1, m4); int expectedResult = 6; int actualResult = testMatricesMatrix.TotalColumns(); (actualResult == expectedResult).Should().BeTrue(); }