adding new files

python/tests/test_backend_loading.py

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+#!/usr/bin/env python3
+import numpy as np
+from PIL import Image
+
+from basisu_py.codec import Encoder, EncoderBackend
+from basisu_py.constants import BasisTexFormat
+
+print("========== BACKEND LOADING TEST ==========\n")
+
+# --------------------------------------------------------------
+# 1. Test native backend (if available)
+# --------------------------------------------------------------
+print("Testing native backend...")
+
+try:
+    enc_native = Encoder(backend=EncoderBackend.NATIVE)
+    print("  [OK] Native backend loaded")
+except Exception as e:
+    print("  [FAIL] Native backend failed to load:", e)
+    enc_native = None
+
+# If native loaded, test very basic functionality
+if enc_native:
+    try:
+        version = enc_native._native.get_version()
+        print(f"  Native get_version() ? {version}")
+
+        ptr = enc_native._native.alloc(16)
+        print(f"  Native alloc() returned ptr = {ptr}")
+
+        enc_native._native.free(ptr)
+        print(f"  Native free() OK")
+
+        print("  [OK] Native basic operations working.\n")
+    except Exception as e:
+        print("  [FAIL] Native operations error:", e)
+else:
+    print("  Skipping native basic operations.\n")
+
+# --------------------------------------------------------------
+# 2. Test WASM backend
+# --------------------------------------------------------------
+print("\nTesting WASM backend...")
+
+try:
+    enc_wasm = Encoder(backend=EncoderBackend.WASM)
+    print("  [OK] WASM backend loaded")
+except Exception as e:
+    print("  [FAIL] WASM backend failed to load:", e)
+    enc_wasm = None
+
+# If WASM loaded, test basic methods
+if enc_wasm and enc_wasm._wasm is not None:
+    try:
+        version = enc_wasm._wasm.get_version()
+        print(f"  WASM get_version() ? {version}")
+
+        ptr = enc_wasm._wasm.alloc(16)
+        print(f"  WASM alloc() returned ptr = {ptr}")
+
+        enc_wasm._wasm.free(ptr)
+        print(f"  WASM free() OK")
+
+        print("  [OK] WASM basic operations working.\n")
+    except Exception as e:
+        print("  [FAIL] WASM operations error:", e)
+else:
+    print("  Skipping WASM basic operations.\n")
+
+print("\n========== DONE ==========\n")