1 files changed, 105 insertions, 0 deletions
diff --git a/test/rtree/test_square_distance.cpp b/test/rtree/test_square_distance.cpp
new file mode 100644
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+++ b/test/rtree/test_square_distance.cpp
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * Copyright (c) 2021 Kohei Yoshida
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ ************************************************************************/
+
+#include "test_global.hpp" // This must be the first header to be included.
+#include "test_global_rtree.hpp"
+
+using mdds::rtree;
+using std::cout;
+using std::endl;
+
+void rtree_test_square_distance()
+{
+    stack_printer __stack_printer__("::rtree_test_square_distance");
+    using mdds::detail::rtree::calc_square_distance;
+
+    {
+        // 1 dimensional unsigned
+        using rt_type = rtree<uint16_t, std::string, tiny_trait_1d>;
+        using point_type = rt_type::point_type;
+
+        struct test_case
+        {
+            point_type p1;
+            point_type p2;
+            uint16_t expected;
+        };
+
+        std::vector<test_case> tcs = {
+            {{3}, {5}, 4},
+            {{9}, {2}, 49},
+            {{0}, {0}, 0},
+        };
+
+        for (const test_case& tc : tcs)
+        {
+            cout << "p1: " << tc.p1.to_string() << "; p2: " << tc.p2.to_string() << endl;
+
+            uint16_t dist = calc_square_distance<point_type>(tc.p1, tc.p2);
+            assert(dist == tc.expected);
+
+            // Flip the value to make sure we still get the same result.
+            dist = calc_square_distance<point_type>(tc.p2, tc.p1);
+            assert(dist == tc.expected);
+        }
+    }
+
+    {
+        // 2 dimensional unsigned
+        using rt_type = rtree<uint16_t, std::string, tiny_trait_2d>;
+        using point_type = rt_type::point_type;
+
+        struct test_case
+        {
+            point_type p1;
+            point_type p2;
+            uint16_t expected;
+        };
+
+        std::vector<test_case> tcs = {
+            {{0, 0}, {0, 0}, 0},
+            {{0, 0}, {1, 1}, 2},
+            {{0, 0}, {2, 2}, 8},
+            {{3, 0}, {0, 4}, 25},
+        };
+
+        for (const test_case& tc : tcs)
+        {
+            cout << "p1: " << tc.p1.to_string() << "; p2: " << tc.p2.to_string() << endl;
+
+            uint16_t dist = calc_square_distance<point_type>(tc.p1, tc.p2);
+            assert(dist == tc.expected);
+
+            // Flip the value to make sure we still get the same result.
+            dist = calc_square_distance<point_type>(tc.p2, tc.p1);
+            assert(dist == tc.expected);
+        }
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */