🧪 [testing improvement] Add Framebuffer::clear tests

CMakeLists.txt

@@ -82,6 +82,11 @@ option(BUILD_TESTS "Build test suite" ON)
 if(BUILD_TESTS)
     enable_testing()
 
+
+    add_executable(test_framebuffer tests/test_framebuffer.cpp)
+    target_link_libraries(test_framebuffer PRIVATE soft_render)
+    add_test(NAME test_framebuffer COMMAND test_framebuffer)
+
     add_executable(test_vec3 tests/test_vec3.cpp)
     target_link_libraries(test_vec3 PRIVATE soft_render)
     add_test(NAME test_vec3 COMMAND test_vec3)

tests/test_framebuffer.cpp

@@ -0,0 +1,71 @@
+#include <cassert>
+#include <iostream>
+#include <limits>
+#include "soft_render/core/framebuffer.hpp"
+#include "soft_render/math/vec3.hpp"
+
+using namespace sr::core;
+using namespace sr::math;
+
+void test_framebuffer_clear() {
+    std::cout << "Running test_framebuffer_clear..." << std::endl;
+
+    int width = 10;
+    int height = 10;
+    Framebuffer fb(width, height);
+
+    // Test clear with default color (black)
+    fb.clear();
+    const Pixel* pixels = fb.pixels();
+    const float* depth = fb.depthBuffer();
+
+    for (int i = 0; i < width * height; ++i) {
+        assert(pixels[i].r == 0);
+        assert(pixels[i].g == 0);
+        assert(pixels[i].b == 0);
+        assert(pixels[i].a == 255);
+        assert(depth[i] == std::numeric_limits<float>::infinity());
+    }
+    std::cout << "  Default clear passed" << std::endl;
+
+    // Test clear with custom color
+    Color customColor(1.0f, 0.5f, 0.25f);
+    fb.clear(customColor);
+
+    for (int i = 0; i < width * height; ++i) {
+        assert(pixels[i].r == 255);
+        assert(pixels[i].g == 127);
+        assert(pixels[i].b == 63);
+        assert(pixels[i].a == 255);
+        assert(depth[i] == std::numeric_limits<float>::infinity());
+    }
+    std::cout << "  Custom color clear passed" << std::endl;
+
+    // Test clear with out-of-bounds color values
+    Color outOfBoundsColor(1.5f, -0.5f, 2.0f);
+    fb.clear(outOfBoundsColor);
+
+    for (int i = 0; i < width * height; ++i) {
+        assert(pixels[i].r == 255); // clamped to 1.0
+        assert(pixels[i].g == 0);   // clamped to 0.0
+        assert(pixels[i].b == 255); // clamped to 1.0
+        assert(pixels[i].a == 255);
+        assert(depth[i] == std::numeric_limits<float>::infinity());
+    }
+    std::cout << "  Out-of-bounds color clear passed" << std::endl;
+
+    // Test depth test modifying depth, then clear
+    fb.depthTest(0, 0, 0.5f);
+    assert(fb.getDepth(0, 0) == 0.5f);
+    fb.clear();
+    assert(fb.getDepth(0, 0) == std::numeric_limits<float>::infinity());
+    std::cout << "  Depth buffer reset passed" << std::endl;
+
+    std::cout << "test_framebuffer_clear passed!" << std::endl;
+}
+
+int main() {
+    test_framebuffer_clear();
+    std::cout << "All tests passed!" << std::endl;
+    return 0;
+}