test: Add tests

test/show_all.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+set -e
+
+# Directory paths
+DATA_DIR='../data'
+OUT_DIR='../out'
+
+IMG_TYPES=('depth' 'rgb')
+
+mkdir -p "${OUT_DIR}"
+
+for json_file in "${DATA_DIR}"/*.json; do
+  base_name=$(basename "${json_file}" '.json')
+  echo "Generating ${base_name}..."
+
+  ../cmake-build-release/raytracing "${json_file}" > /dev/null
+
+  for img_type in "${IMG_TYPES[@]}"; do
+    mv "${img_type}.png" "${OUT_DIR}/${base_name}-${img_type}.png"
+  done
+done

test/test_all.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+set -e
+
+# Directory paths
+TEST_DIR='../out'
+CORRECT_DIR='../correct_results'
+
+for file in ${CORRECT_DIR}/*.png; do
+  base_name=$(basename "${file}" '.png')
+  echo "Testing ${base_name}..."
+
+  if ! diff "${file}" "${TEST_DIR}/${base_name}-rgb.png"; then
+    echo "RGB image ${base_name} is incorrect."
+  fi
+done