diff --git a/Tests/Rectangle_tests.h b/Tests/Rectangle_tests.h
index a8452fd..71f7ac7 100644
--- a/Tests/Rectangle_tests.h
+++ b/Tests/Rectangle_tests.h
@@ -167,12 +167,151 @@ namespace ttl
       assert(rec.pos() == RC(0, 0));
       assert(rec.size() == RC(0, 0));
       
+      // No need to replicate these two tests for rectangles of other dimensions:
       auto rec_tmp = rec;
       rec_tmp.set_pos({ 2, -1 });
       rec_tmp.set_size({ 4, 4 });
       assert(rec_tmp.pos() == RC(2, -1));
       assert(rec_tmp.size() == RC(4, 4));
     }
+    
+    {
+      Rectangle rec { -1, +1, 2, 1}; // [-1..0, 1]
+      
+      assert(rec.r == -1);
+      assert(rec.c == +1);
+      assert(rec.r_len == 2);
+      assert(rec.c_len == 1);
+      
+      assert(!rec.is_inside(0, 0));
+      assert(!rec.is_inside(1, 0));
+      assert(rec.is_inside(0, 1));
+      assert(!rec.is_inside(-1, 0));
+      assert(!rec.is_inside(0, -1));
+      assert(!rec.is_inside(pt0));
+      assert(!rec.is_inside(pt1));
+      assert(rec.is_inside(pt2));
+      assert(!rec.is_inside(pt3));
+      assert(!rec.is_inside(pt4));
+      
+      assert(!rec.is_inside_offs(0, 0, -1));
+      assert(rec.is_inside_offs(0, 0, +1));
+      assert(!rec.is_inside_offs(1, 0, -1));
+      assert(rec.is_inside_offs(1, 0, +1));
+      assert(!rec.is_inside_offs(0, 1, -1));
+      assert(rec.is_inside_offs(0, 1, +1));
+      assert(!rec.is_inside_offs(-1, 0, -1));
+      assert(rec.is_inside_offs(-1, 0, +1));
+      assert(!rec.is_inside_offs(0, -1, -1));
+      assert(!rec.is_inside_offs(0, -1, +1));
+      assert(rec.is_inside_offs(0, -1, +2));
+      assert(!rec.is_inside_offs(pt0, -1));
+      assert(rec.is_inside_offs(pt0, +1));
+      assert(!rec.is_inside_offs(pt1, -1));
+      assert(rec.is_inside_offs(pt1, +1));
+      assert(!rec.is_inside_offs(pt2, -1));
+      assert(rec.is_inside_offs(pt2, +1));
+      assert(!rec.is_inside_offs(pt3, -1));
+      assert(rec.is_inside_offs(pt3, +1));
+      assert(!rec.is_inside_offs(pt4, -1));
+      assert(!rec.is_inside_offs(pt4, +1));
+      assert(rec.is_inside_offs(pt4, +2));
+      
+      assert(rec.is_inside_offs(pt0, +1, +2));
+      assert(rec.is_inside_offs(pt1, +1, +2));
+      assert(rec.is_inside_offs(pt2, +1, +2));
+      assert(rec.is_inside_offs(pt3, +1, +2));
+      assert(rec.is_inside_offs(pt4, +1, +2));
+      
+      assert(!rec.is_inside_offs(pt0, +1, +2, 0, +1));
+      assert(rec.is_inside_offs(pt0, +1, +2, +1, 0));
+      assert(!rec.is_inside_offs(pt0, +2, 0, 0, +1));
+      assert(rec.is_inside_offs(pt0, 0, +1, +1, +1));
+      assert(!rec.is_inside_offs(pt0, 0, +1, -1, +1));
+      assert(!rec.is_inside_offs(pt0, -1, +1, -1, +1));
+      assert(!rec.is_inside_offs(pt0, +1, -1, +1, -1));
+      assert(rec.is_inside_offs(pt0, +1, +1, +1, +1));
+      assert(rec.is_inside_offs(pt0, +2, +2, +2, +2));
+      
+      assert(!rec.is_inside_offs(pt1, +1, +2, 0, +1));
+      assert(rec.is_inside_offs(pt1, +1, +2, +1, 0));
+      assert(!rec.is_inside_offs(pt1, +2, 0, 0, +1));
+      assert(rec.is_inside_offs(pt1, 0, +1, +1, +1));
+      assert(!rec.is_inside_offs(pt1, 0, +1, -1, +1));
+      assert(!rec.is_inside_offs(pt1, -1, +1, -1, +1));
+      assert(!rec.is_inside_offs(pt1, +1, -1, +1, -1));
+      assert(rec.is_inside_offs(pt1, +1, +1, +1, +1));
+      assert(rec.is_inside_offs(pt1, +2, +2, +2, +2));
+      
+      assert(rec.is_inside_offs(pt2, +1, +2, 0, +1));
+      assert(rec.is_inside_offs(pt2, +1, +2, +1, 0));
+      assert(rec.is_inside_offs(pt2, +2, 0, 0, +1));
+      assert(rec.is_inside_offs(pt2, 0, +1, +1, +1));
+      assert(!rec.is_inside_offs(pt2, 0, +1, -1, +1));
+      assert(!rec.is_inside_offs(pt2, -1, +1, -1, +1));
+      assert(!rec.is_inside_offs(pt2, +1, -1, +1, -1));
+      assert(rec.is_inside_offs(pt2, +1, +1, +1, +1));
+      assert(rec.is_inside_offs(pt2, +2, +2, +2, +2));
+      
+      assert(!rec.is_inside_offs(pt3, +1, +2, 0, +1));
+      assert(rec.is_inside_offs(pt3, +1, +2, +1, 0));
+      assert(!rec.is_inside_offs(pt3, +2, 0, 0, +1));
+      assert(rec.is_inside_offs(pt3, 0, +1, +1, +1));
+      assert(!rec.is_inside_offs(pt3, 0, +1, -1, +1));
+      assert(!rec.is_inside_offs(pt3, -1, +1, -1, +1));
+      assert(rec.is_inside_offs(pt3, +1, -1, +1, -1));
+      assert(rec.is_inside_offs(pt3, +1, +1, +1, +1));
+      assert(rec.is_inside_offs(pt3, +2, +2, +2, +2));
+      
+      assert(!rec.is_inside_offs(pt4, +1, +2, 0, +1));
+      assert(!rec.is_inside_offs(pt4, +1, +2, +1, 0));
+      assert(!rec.is_inside_offs(pt4, +2, 0, 0, +1));
+      assert(!rec.is_inside_offs(pt4, 0, +1, +1, +1));
+      assert(!rec.is_inside_offs(pt4, 0, +1, -1, +1));
+      assert(!rec.is_inside_offs(pt4, -1, +1, -1, +1));
+      assert(!rec.is_inside_offs(pt4, +1, -1, +1, -1));
+      assert(!rec.is_inside_offs(pt4, +1, +1, +1, +1));
+      assert(rec.is_inside_offs(pt4, +2, +2, +2, +2));
+      
+      assert(rec.is_on_border(pt0));
+      assert(!rec.is_on_border(pt1));
+      assert(rec.is_on_border(pt2));
+      assert(rec.is_on_border(pt3));
+      assert(rec.is_on_border(pt4));
+      
+      assert(rec.find_location(pt0) == BBLocation::OutsideLeft);
+      assert(rec.find_location(pt1) == BBLocation::OutsideBottomLeft);
+      assert(rec.find_location(pt2) == BBLocation::Inside); // rec:[-1..0, 1], pt2:[0, 1]
+      assert(rec.find_location(pt3) == BBLocation::OutsideLeft);
+      assert(rec.find_location(pt4) == BBLocation::OutsideLeft);
+      
+      assert(rec.find_location_offs(pt0, 0, +1, 0, +1) == BBLocation::OutsideLeft);
+      assert(rec.find_location_offs(pt0, -1, +1, 0, +1) == BBLocation::OutsideLeft);
+      assert(rec.find_location_offs(pt1, 0, +1, 0, +1) == BBLocation::OutsideLeft);
+      assert(rec.find_location_offs(pt1, 0, +2, 0, +1) == BBLocation::OutsideLeft);
+      assert(rec.find_location_offs(pt2, 0, +1, 0, +1) == BBLocation::Inside);
+      assert(rec.find_location_offs(pt2, 0, +1, 0, +2) == BBLocation::Inside);
+      assert(rec.find_location_offs(pt3, 0, +1, 0, +1) == BBLocation::OutsideLeft);
+      assert(rec.find_location_offs(pt3, +1, 0, 0, +1) == BBLocation::OutsideLeft);
+      assert(rec.find_location_offs(pt4, 0, +1, 0, +1) == BBLocation::OutsideLeft);
+      assert(rec.find_location_offs(pt4, 0, +1, +1, +1) == BBLocation::OutsideLeft);
+      assert(rec.find_location_offs(pt4, -1, 0, -1, 0) == BBLocation::None); // rec:[-1..0, 1] -> [0, .], pt4:[0, -1]
+      
+      assert(!rec.is_empty());
+      assert(!rec.is_inverted());
+      assert(!rec.is_collapsed());
+      assert(rec.is_valid());
+      
+      assert(rec.center() == RC(0, 1)); // rec:[-1..0, 1], { -1, +1, 2, 1}/2 = -1+1, 1+0.5
+      assert(rec.r_mid() == 0);
+      assert(rec.c_mid() == 1);
+      assert(rec.top() == -1);
+      assert(rec.bottom() == 0);
+      assert(rec.left() == 1);
+      assert(rec.right() == 1);
+      assert(rec.pos() == RC(-1, +1));
+      assert(rec.size() == RC(2, 1));
+    }
   }
   
 }