src: robotics: bresenham: improve test coverage

Author: pllee4

src/robotics/bresenham/test/bresenham_test.cpp

@@ -36,3 +36,14 @@ TEST(Bresenham, CheckLineFromPositiveTowardsRightUpwards) {
   EXPECT_TRUE(std::equal(std::begin(points), std::end(points),
                          std::begin(expected), std::end(expected)));
 }
+
+TEST(Bresenham, CheckLineMoreHorizontalThanVertical) {
+  Coordinate start{1, 3};
+  Coordinate end{6, 4};
+  LineGenerator line(start, end);
+  auto points = line.GetPoints();
+  std::vector<Coordinate> expected = {
+      {1, 3}, {2, 3}, {3, 3}, {4, 4}, {5, 4}, {6, 4}};
+  EXPECT_TRUE(std::equal(std::begin(points), std::end(points),
+                         std::begin(expected), std::end(expected)));
+}