public void BuildTest_CreateMatrixByExpressionXMulXPlusY_AssertMustBeEqual() { // Arrange int[] arr = { 1, 2, 3, 4 }; Matrix <int> expected = new[, ] { { 1, 4, 9, 16 }, }; // Act var actual = BuildMatrix.Build(1, 4, (x, y) => x * x, arr); // Assert Assert.Equal(expected, actual); }