Update redis options parsing

sdk/python/feast/infra/online_stores/redis.py

@@ -102,7 +102,7 @@ def _parse_connection_string(connection_string: str):
         params = {}
         for c in connection_string.split(","):
             if "=" in c:
-                kv = c.split("=")
+                kv = c.split("=", 1)
                 try:
                     kv[1] = json.loads(kv[1])
                 except json.JSONDecodeError:

sdk/python/tests/test_cli_redis.py

@@ -5,6 +5,7 @@
 from textwrap import dedent
 
 import pytest
+import redis
 
 from feast.feature_store import FeatureStore
 from tests.cli_utils import CliRunner
@@ -58,3 +59,47 @@ def test_basic() -> None:
 
         result = runner.run(["teardown"], cwd=repo_path)
         assert result.returncode == 0
+
+
+@pytest.mark.integration
+def test_connection_error() -> None:
+    project_id = "".join(
+        random.choice(string.ascii_lowercase + string.digits) for _ in range(10)
+    )
+    runner = CliRunner()
+    with tempfile.TemporaryDirectory() as repo_dir_name, tempfile.TemporaryDirectory() as data_dir_name:
+
+        repo_path = Path(repo_dir_name)
+        data_path = Path(data_dir_name)
+
+        repo_config = repo_path / "feature_store.yaml"
+
+        repo_config.write_text(
+            dedent(
+                f"""
+        project: {project_id}
+        registry: {data_path / "registry.db"}
+        provider: local
+        offline_store:
+            type: file
+        online_store:
+            type: redis
+            connection_string: localhost:6379,db=0=
+        """
+            )
+        )
+
+        repo_example = repo_path / "example.py"
+        repo_example.write_text(
+            (Path(__file__).parent / "example_feature_repo_2.py").read_text()
+        )
+
+        result = runner.run(["apply"], cwd=repo_path)
+        assert result.returncode == 0
+
+        # Redis does not support names for its databases.
+        with pytest.raises(redis.exceptions.ResponseError):
+            basic_rw_test(
+                FeatureStore(repo_path=str(repo_path), config=None),
+                view_name="driver_hourly_stats",
+            )