test: Add diff tests

test/test_all.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+set -e
+
+# Directory paths
+DATA_DIR='../data'
+CORRECT_DIR='../correct_results'
+
+IMG_TYPES=('normal' 'depth' 'id')
+
+for json_file in ${DATA_DIR}/*.json; do
+  base_name=$(basename "${json_file}" '.json')
+  echo "Testing ${base_name}..."
+
+  ../build/raycasting "${json_file}" > /dev/null
+
+  for img_type in "${IMG_TYPES[@]}"; do
+    diff "${img_type}.png" "${CORRECT_DIR}/${base_name}-${img_type}.png"
+  done
+done
+
+# Cleanup
+for img_type in "${IMG_TYPES[@]}"; do
+  rm "${img_type}.png"
+done
+