Update pyxel recipe: use URL source and refactor tests to functions

Co-authored-by: IsabelParedes <23283243+IsabelParedes@users.noreply.github.com>

Author: Copilot

recipes/recipes_emscripten/pyxel/recipe.yaml

@@ -7,8 +7,8 @@ package:
   version: ${{ version }}
 
 source:
-- git: https://github.com/kitao/pyxel.git
-  tag: v${{ version }}
+  url: https://github.com/kitao/pyxel/archive/refs/tags/v${{ version }}.tar.gz
+  sha256: da328a30f76dae5f9df0130ae746248f8ef23efba6f3a5e5429df34ba81c345a
 
 build:
   number: 0

recipes/recipes_emscripten/pyxel/test_import_pyxel.py

@@ -1,22 +1,22 @@
-#!/usr/bin/env python
-
-try:
+def test_import_pyxel():
+    """Test that pyxel can be imported successfully."""
     import pyxel
     print("pyxel import successful")
-    
-    # Test basic functionality
+
+
+def test_pyxel_version():
+    """Test that pyxel version is accessible."""
+    import pyxel
     print(f"pyxel version: {pyxel.__version__}")
+
+
+def test_pyxel_basic_attributes():
+    """Test that basic pyxel attributes are available."""
+    import pyxel
 
     # Try to access some basic pyxel attributes
     assert hasattr(pyxel, 'init'), "pyxel.init not found"
-    assert hasattr(pyxel, 'run'), "pyxel.run not found"
+    assert hasattr(pyxel, 'run'), "pyxel.run not found" 
     assert hasattr(pyxel, 'cls'), "pyxel.cls not found"
 
-    print("All basic pyxel imports and attributes are available")
-    
-except ImportError as e:
-    print(f"Failed to import pyxel: {e}")
-    raise
-except Exception as e:
-    print(f"Error during pyxel testing: {e}")
-    raise
+    print("All basic pyxel imports and attributes are available")