Start conv test implementation

test/layers/test_conv2d.cu

@@ -0,0 +1,35 @@
+#include <cuda_runtime_api.h>
+#include <gtest/gtest.h>
+
+#include <iostream>
+
+#include "conv2d.cuh"
+
+TEST(Conv2dTest, ValidPadding) {
+
+    int inputSize = 3;
+    int inputChannels = 1;
+    int kernelSize = 3;
+    int stride = 1;
+    std::string padding = "VALID";
+    int numFilters = 1;
+    Activation activation = LINEAR;
+
+    Layers::Conv2d conv2d(
+        inputSize,
+        inputChannels,
+        kernelSize,
+        stride,
+        padding,
+        numFilters,
+        activation
+    );
+
+    int outputSize = (inputSize - kernelSize) / stride + 1;
+    EXPECT_EQ(outputSize, conv2d.outputSize);
+
+    std::vector<float> input(inputSize * inputSize * inputChannels);
+    std::vector<float> output(outputSize * outputSize * numFilters);
+    std::vector<float> kernels(kernelSize * kernelSize * inputChannels * numFilters);
+
+}