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python/tests/test_transcoder_backend_loading.py

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+#!/usr/bin/env python3
+import sys
+from basisu_py.transcoder import Transcoder, TranscoderBackend
+from basisu_py.constants import BasisTexFormat
+
+print("========== TESTING TRANSCODER BACKENDS ==========\n")
+
+# Load some test data (ensure test.ktx2 exists)
+try:
+    test_data = open("test.ktx2", "rb").read()
+    print("[INFO] Loaded test.ktx2")
+except FileNotFoundError:
+    print("[ERROR] test.ktx2 not found. Create one first via encoder tests.")
+    sys.exit(1)
+
+
+# -------------------------------------------------------------------
+# 1. Test NATIVE backend
+# -------------------------------------------------------------------
+print("\n--- Testing NATIVE transcoder backend ---")
+
+try:
+    t_native = Transcoder(TranscoderBackend.NATIVE)
+    print("  [OK] Native backend loaded")
+
+    version = t_native.get_version()
+    print(f"  Native get_version() = {version}")
+
+    # Open KTX2
+    raw = t_native.open(test_data)
+    print("  [OK] Opened KTX2 (native)")
+
+    # Query some basic properties
+    print("   Width :", t_native.get_width(raw))
+    print("   Height:", t_native.get_height(raw))
+    print("   Levels:", t_native.get_levels(raw))
+
+    # Cleanup
+    t_native.close(raw)
+    print("  [OK] Native transcoder basic operations working.")
+
+except Exception as e:
+    print("  [FAIL] Native transcoder error:", e)
+
+
+# -------------------------------------------------------------------
+# 2. Test WASM backend
+# -------------------------------------------------------------------
+print("\n--- Testing WASM transcoder backend ---")
+
+try:
+    t_wasm = Transcoder(TranscoderBackend.WASM)
+    print("  [OK] WASM backend loaded")
+
+    version = t_wasm.get_version()
+    print(f"  WASM get_version() = {version}")
+
+    raw = t_wasm.open(test_data)
+    print("  [OK] Opened KTX2 (wasm)")
+
+    print("   Width :", t_wasm.get_width(raw))
+    print("   Height:", t_wasm.get_height(raw))
+    print("   Levels:", t_wasm.get_levels(raw))
+
+    t_wasm.close(raw)
+    print("  [OK] WASM transcoder basic operations working.")
+
+except Exception as e:
+    print("  [FAIL] WASM transcoder error:", e)
+
+
+print("\n========== DONE ==========")