Added tests for mirroring functions

Exec/main.cpp

@@ -23,12 +23,12 @@ int main() {
     bmp.Write("write.bmp");
 */
 
-    BMP bmp("test.bmp");
+    BMP bmp("basea_gradient.bmp");
 
-    //BMP newBmp = bmp.MirrorHorizontally();
+    BMP newBmp = bmp.MirrorHorizontally();
-    BMP newBmp = bmp.MirrorVertically();
+    //BMP newBmp = bmp.MirrorVertically();
 
-    if(!newBmp.Write("testwrite.bmp"))
+    if(!newBmp.Write("basea_gradient_flipped_hor.bmp"))
         std::cerr << "What the hell" << std::endl;
 
     /*

Test/CMakeLists.txt

@@ -25,6 +25,8 @@ add_executable(Test
         Write.cpp
         OperatorEquals.cpp
         FillChannel.cpp
+        MirrorHorizontally.cpp
+        MirrorVertically.cpp
 )
 
 # Move test images to build dir

Test/MirrorHorizontally.cpp

@@ -0,0 +1,39 @@
+#include <Bmp.h>
+#include <stdexcept>
+#include "Catch2.h"
+
+using namespace Leonetienne::BmpPP;
+using namespace Eule;
+
+// Tests the mirror horizontal function against reference images
+TEST_CASE(__FILE__"/Mirroring produces the correct results", "[Mirroring][MirrorHorizontally]")
+{
+    SECTION("RGB") {
+        // Read a gradient image
+        BMP bmp("base_gradient.bmp");
+
+        // Mirror it
+        bmp = bmp.MirrorHorizontally();
+
+        // Read reference image
+        const BMP reference("base_gradient_flipped_hor.bmp");
+
+        // Assert that they are equal
+        REQUIRE(bmp == reference);
+    }
+
+    SECTION("RGBA") {
+        // Read a gradient image
+        BMP bmp("basea_gradient.bmp");
+
+        // Mirror it
+        bmp = bmp.MirrorHorizontally();
+
+        // Read reference image
+        const BMP reference("basea_gradient_flipped_hor.bmp");
+
+        // Assert that they are equal
+        REQUIRE(bmp == reference);
+    }
+    return;
+}

Test/MirrorVertically.cpp

@@ -0,0 +1,39 @@
+#include <Bmp.h>
+#include <stdexcept>
+#include "Catch2.h"
+
+using namespace Leonetienne::BmpPP;
+using namespace Eule;
+
+// Tests the mirror vertical function against reference images
+TEST_CASE(__FILE__"/Mirroring produces the correct results", "[Mirroring][MirrorVertically]")
+{
+    SECTION("RGB") {
+        // Read a gradient image
+        BMP bmp("base_gradient.bmp");
+
+        // Mirror it
+        bmp = bmp.MirrorVertically();
+
+        // Read reference image
+        const BMP reference("base_gradient_flipped_ver.bmp");
+
+        // Assert that they are equal
+        REQUIRE(bmp == reference);
+    }
+
+    SECTION("RGBA") {
+        // Read a gradient image
+        BMP bmp("basea_gradient.bmp");
+
+        // Mirror it
+        bmp = bmp.MirrorVertically();
+
+        // Read reference image
+        const BMP reference("basea_gradient_flipped_ver.bmp");
+
+        // Assert that they are equal
+        REQUIRE(bmp == reference);
+    }
+    return;
+}