u02: Implement rectangle tool

u02/src/tests.cpp

@@ -9,6 +9,7 @@
 #include "canvas_buffer.h"
 #include "dda_line_tool.h"
 #include "non_recursive_fill_tool.h"
+#include "rectangle_tool.h"
 #include "recursive_fill_tool.h"
 #include "util.h"
 
@@ -263,3 +264,37 @@ TEST_CASE("Fill recursive == Fill non recursive (prop, 5 random lines)") {
   }
   REQUIRE(equal);
 }
+
+TEST_CASE("Rectangle (prop)") {
+  const int size = 100;
+
+  const int x0 = GENERATE(take(5, random(0, size - 1)));
+  const int y0 = GENERATE(take(5, random(0, size - 1)));
+  const int x1 = GENERATE(take(5, random(0, size - 1)));
+  const int y1 = GENERATE(take(5, random(0, size - 1)));
+
+  const int x_min = std::min(x0, x1);
+  const int x_max = std::max(x0, x1);
+  const int y_min = std::min(y0, y1);
+  const int y_max = std::max(y0, y1);
+
+  canvas_buffer *canvas = new canvas_buffer(size, size);
+  rectangle_tool *tool = new rectangle_tool(*canvas);
+
+  tool->draw(x0, y0, x1, y1);
+
+  bool pass = true;
+  for (int x = 0; x < size; x++) {
+    for (int y = 0; y < size; y++) {
+      if (((x == x0 || x == x1) && (y >= y_min && y <= y_max)) ||
+          ((y == y0 || y == y1) && (x >= x_min && x <= x_max))) {
+        if (!canvas->get_pixel(x, y))
+          pass = false;
+      } else {
+        if (canvas->get_pixel(x, y))
+          pass = false;
+      }
+    }
+  }
+  REQUIRE(pass);
+}