It is now possible to create uninitialized images

Test/Uninitialized.cpp

@@ -0,0 +1,72 @@
+#include <Bmp.h>
+#include <stdexcept>
+#include "Catch2.h"
+
+using namespace Leonetienne::BmpPP;
+
+// Tests that trying to interrogate any getter/Write() on an uninitialized image results in a runtime error
+TEST_CASE(__FILE__"/RuntimeErrorOnUninitialized", "[Uninitialized]")
+{
+    // Create uninitialized image
+    BMP bmp;
+
+    REQUIRE_THROWS_AS(
+        bmp.GetPixel({50, 60})
+        , std::runtime_error
+    );
+
+    REQUIRE_THROWS_AS(
+        bmp.SetPixel({50, 60}, 1,2,3,4)
+        , std::runtime_error
+    );
+
+    REQUIRE_THROWS_AS(
+        bmp.data()
+        , std::runtime_error
+    );
+
+    REQUIRE_THROWS_AS(
+        bmp.GetDimensions()
+        , std::runtime_error
+    );
+
+    REQUIRE_THROWS_AS(
+        bmp.GetColormode()
+        , std::runtime_error
+    );
+
+    REQUIRE_THROWS_AS(
+        bmp.GetNumColorChannels()
+        , std::runtime_error
+    );
+
+    REQUIRE_THROWS_AS(
+        bmp.GetPixelbufferSize()
+        , std::runtime_error
+    );
+
+    REQUIRE_THROWS_AS(
+        bmp.Write("foo.bmp")
+        , std::runtime_error
+    );
+
+    return;
+}
+
+// Tests that an uninitialized image reports to be uninitialized
+TEST_CASE(__FILE__"/UninitializedImageIsUninitialized", "[Uninitialized]")
+{
+    BMP bmp;
+    REQUIRE_FALSE(bmp.IsInitialized());
+
+    return;
+}
+
+// Tests that an image constructed via dimensions is initialized
+TEST_CASE(__FILE__"/ConstructedByDimensionsIsInitialized", "[Uninitialized]")
+{
+    BMP bmp({800, 600});
+    REQUIRE(bmp.IsInitialized());
+
+    return;
+}