public void Search_Diagonal_Downward(string word) { // Arrange List <XY> expectedPoints = new List <XY> { new XY(2, 1), new XY(3, 2), new XY(4, 3), new XY(5, 4), new XY(6, 5) }; // Act WordSearch wordSearch = new WordSearch(GetMatrix()); var actualPoints = wordSearch.DiagonalDownwardSearch(word); XYComparer xYComparer = new XYComparer(); // Assert CollectionAssert.AreEqual(expectedPoints, actualPoints, xYComparer); }