chore: refactor and add components integration tests (#3607)

* improve inegration tests

* add fixes

* [autofix.ci] apply automated fixes

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

src/backend/tests/api_keys.py

@@ -0,0 +1,34 @@
+import os.path
+
+# we need to import tmpdir
+
+
+def get_required_env_var(var: str) -> str:
+    """
+    Get the value of the specified environment variable.
+
+    Args:
+    var (str): The environment variable to get.
+
+    Returns:
+    str: The value of the environment variable.
+
+    Raises:
+    ValueError: If the environment variable is not set.
+    """
+    value = os.getenv(var)
+    if not value:
+        raise ValueError(f"Environment variable {var} is not set")
+    return value
+
+
+def get_openai_api_key() -> str:
+    return get_required_env_var("OPENAI_API_KEY")
+
+
+def get_astradb_application_token() -> str:
+    return get_required_env_var("ASTRA_DB_APPLICATION_TOKEN")
+
+
+def get_astradb_api_endpoint() -> str:
+    return get_required_env_var("ASTRA_DB_API_ENDPOINT")