1 files changed, 97 insertions, 0 deletions
diff --git a/testing/web-platform/tests/tools/wave/configuration_loader.py b/testing/web-platform/tests/tools/wave/configuration_loader.py
new file mode 100644
index 0000000000..2e2aa33151
--- /dev/null
+++ b/testing/web-platform/tests/tools/wave/configuration_loader.py
@@ -0,0 +1,97 @@
+# mypy: allow-untyped-defs
+
+import json
+import os
+
+from tools.wpt import wpt
+
+DEFAULT_CONFIGURATION_FILE_PATH = os.path.join(wpt.localpaths.repo_root, "./tools/wave/config.default.json")
+
+
+def load(configuration_file_path):
+    configuration = {}
+    if configuration_file_path:
+        configuration = load_configuration_file(configuration_file_path)
+    default_configuration = load_configuration_file(
+        DEFAULT_CONFIGURATION_FILE_PATH)
+
+    configuration["wpt_port"] = configuration.get(
+        "ports", default_configuration["ports"]).get(
+        "http", default_configuration["ports"]["http"])[0]
+    configuration["wpt_ssl_port"] = configuration.get(
+        "ports", default_configuration["ports"]).get(
+        "https", default_configuration["ports"]["https"])[0]
+
+    web_root = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "web_root", default_configuration["wave"]["web_root"])
+    if not web_root.startswith("/"):
+        web_root = "/" + web_root
+    if not web_root.endswith("/"):
+        web_root += "/"
+    configuration["web_root"] = web_root
+
+    configuration["results_directory_path"] = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "results", default_configuration["wave"]["results"])
+
+    configuration["timeouts"] = {}
+    configuration["timeouts"]["automatic"] = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "timeouts", default_configuration["wave"]["timeouts"]).get(
+        "automatic", default_configuration["wave"]["timeouts"]["automatic"])
+    configuration["timeouts"]["manual"] = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "timeouts", default_configuration["wave"]["timeouts"]).get(
+        "manual", default_configuration["wave"]["timeouts"]["manual"])
+
+    configuration["hostname"] = configuration.get(
+        "browser_host", default_configuration["browser_host"])
+
+    configuration["import_results_enabled"] = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "enable_import_results",
+        default_configuration["wave"]["enable_import_results"])
+
+    configuration["read_sessions_enabled"] = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "enable_read_sessions",
+        default_configuration["wave"]["enable_read_sessions"])
+
+    configuration["persisting_interval"] = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "persisting_interval", default_configuration["wave"]["persisting_interval"])
+
+    configuration["event_cache_duration"] = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "event_cache_duration", default_configuration["wave"]["event_cache_duration"])
+
+    configuration["tests_directory_path"] = os.getcwd()
+
+    configuration["manifest_file_path"] = os.path.join(
+        os.getcwd(), "MANIFEST.json")
+
+    configuration["api_titles"] = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "api_titles", default_configuration["wave"]["api_titles"])
+
+    configuration["enable_test_type_selection"] = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "enable_test_type_selection", default_configuration["wave"]["enable_test_type_selection"])
+
+    configuration["enable_test_file_selection"] = configuration.get(
+        "wave", default_configuration["wave"]).get(
+        "enable_test_file_selection", default_configuration["wave"]["enable_test_file_selection"])
+
+    return configuration
+
+
+def load_configuration_file(path):
+    if not os.path.isfile(path):
+        return {}
+
+    configuration = None
+    with open(path) as configuration_file:
+        configuration_file_content = configuration_file.read()
+        configuration = json.loads(configuration_file_content)
+    return configuration