Vector2: Add unit tests

tests/CMakeLists.txt

@@ -15,7 +15,8 @@ set(TEST_SOURCES
   zm_comms.cpp
   zm_crypt.cpp
   zm_font.cpp
-  zm_utils.cpp)
+  zm_utils.cpp
+  zm_vector2.cpp)
 
 add_executable(tests main.cpp ${TEST_SOURCES})
 

tests/zm_vector2.cpp

@@ -0,0 +1,87 @@
+/*
+ * This file is part of the ZoneMinder Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "catch2/catch.hpp"
+
+#include "zm_vector2.h"
+
+std::ostream &operator<<(std::ostream &os, Vector2 const &value) {
+  os << "{ X: " << value.X() << ", Y: " << value.Y() << " }";
+  return os;
+}
+
+TEST_CASE("Vector2: default constructor") {
+  Vector2 c;
+  REQUIRE(c.X() == 0);
+  REQUIRE(c.Y() == 0);
+}
+
+TEST_CASE("Vector2: x/y constructor") {
+  Vector2 c(1, 2);
+
+  REQUIRE(c.X() == 1);
+  REQUIRE(c.Y() == 2);
+}
+
+TEST_CASE("Vector2: assignment/copy") {
+  Vector2 c;
+  Vector2 c2(1, 2);
+
+  REQUIRE(c.X() == 0);
+  REQUIRE(c.Y() == 0);
+
+  SECTION("assignment operator") {
+    c = c2;
+    REQUIRE(c.X() == 1);
+    REQUIRE(c.Y() == 2);
+  }
+
+  SECTION("copy constructor") {
+    Vector2 c3(c2); // NOLINT(performance-unnecessary-copy-initialization)
+    REQUIRE(c3.X() == 1);
+    REQUIRE(c3.Y() == 2);
+  }
+}
+
+TEST_CASE("Vector2: comparison operators") {
+  Vector2 c1(1, 2);
+  Vector2 c2(1, 2);
+  Vector2 c3(1, 3);
+
+  REQUIRE((c1 == c2) == true);
+  REQUIRE((c1 != c3) == true);
+}
+
+TEST_CASE("Vector2: arithmetic operators") {
+  Vector2 c(1, 1);
+
+  SECTION("addition") {
+    Vector2 c1 = c + Vector2(1, 1);
+    REQUIRE(c1 == Vector2(2, 2));
+
+    c += {1, 2};
+    REQUIRE(c == Vector2(2, 3));
+  }
+
+  SECTION("subtraction") {
+    Vector2 c1 = c - Vector2(1, 1);
+    REQUIRE(c1 == Vector2(0, 0));
+
+    c -= {1, 2};
+    REQUIRE(c == Vector2(0, -1));
+  }
+}