Add tool to check real world prefixes

tests/check_prefixes.py

@@ -0,0 +1,31 @@
+import os
+import sys
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from lutris.util.wineregistry import WineRegistry
+PREFIXES_PATH = os.path.expanduser("~/Games/wine/prefixes")
+
+
+def get_registries():
+    registries = []
+    for prefix in os.listdir(PREFIXES_PATH):
+        for path in os.listdir(os.path.join(PREFIXES_PATH, prefix)):
+            if path.endswith(".reg"):
+                registries.append(os.path.join(PREFIXES_PATH, prefix, path))
+    return registries
+
+
+def check_registry(registry_path):
+    with open(registry_path, 'r') as registry_file:
+        original_content = registry_file.read()
+
+    registry = WineRegistry(registry_path)
+    content = registry.render()
+    if content != original_content:
+        with open(os.path.join(os.path.dirname(__file__), 'error.reg'), 'w') as wrong_reg:
+            wrong_reg.write(content)
+
+        raise ValueError("Invalid prefix parsing for {}".format(registry_path))
+
+
+for registry in get_registries():
+    check_registry(registry)