Move settings validation to startup check

pccommon/pccommon/config/core.py

@@ -4,7 +4,7 @@
 from cachetools import Cache, LRUCache, cachedmethod
 from cachetools.func import lru_cache
 from cachetools.keys import hashkey
-from pydantic import BaseModel, BaseSettings, Field, PrivateAttr
+from pydantic import BaseModel, BaseSettings, Field, PrivateAttr, validator
 
 from pccommon.config.collections import CollectionConfigTable
 from pccommon.config.containers import ContainerConfigTable
@@ -23,6 +23,16 @@ class TableConfig(BaseModel):
     table_name: str
     account_url: Optional[str] = None
 
+    @validator("account_url")
+    def validate_url(cls, value: str) -> str:
+        if value and not value.startswith("http://azurite:"):
+            raise ValueError(
+                "Non-azurite account url provided. "
+                "Account keys can only be used with Azurite emulator."
+            )
+
+        return value
+
 
 class PCAPIsConfig(BaseSettings):
     _cache: Cache = PrivateAttr(default_factory=lambda: LRUCache(maxsize=10))

pccommon/tests/config/test_table_settings.py

@@ -0,0 +1,22 @@
+import pytest
+
+from pccommon.config.core import TableConfig
+
+
+def test_raises_on_non_azurite_account_url() -> None:
+
+    invalid_url = "https://example.com"
+    with pytest.raises(ValueError) as exc_info:
+        TableConfig(account_url=invalid_url, table_name="test", account_name="test")
+
+    assert (
+        "Non-azurite account url provided. "
+        "Account keys can only be used with Azurite emulator."
+    ) in str(exc_info.value)
+
+
+def test_settings_accepts_azurite_url() -> None:
+    valid_url = "http://azurite:12345"
+
+    config = TableConfig(account_url=valid_url, table_name="test", account_name="test")
+    assert config.account_url == valid_url