Fix table_exists behavior in the rest catalog (#1096)

Author: ndrluis

pyiceberg/catalog/rest.py

@@ -834,4 +834,15 @@ def table_exists(self, identifier: Union[str, Identifier]) -> bool:
         response = self._session.head(
             self.url(Endpoints.load_table, prefixed=True, **self._split_identifier_for_path(identifier_tuple))
         )
-        return response.status_code in (200, 204)
+
+        if response.status_code == 404:
+            return False
+        elif response.status_code == 204:
+            return True
+
+        try:
+            response.raise_for_status()
+        except HTTPError as exc:
+            self._handle_non_200_response(exc, {})
+
+        return False

tests/catalog/test_rest.py

@@ -32,6 +32,7 @@
     NoSuchNamespaceError,
     NoSuchTableError,
     OAuthError,
+    ServerError,
     TableAlreadyExistsError,
 )
 from pyiceberg.io import load_file_io
@@ -701,17 +702,17 @@ def test_load_table_404(rest_mock: Mocker) -> None:
     assert "Table does not exist" in str(e.value)
 
 
-def test_table_exist_200(rest_mock: Mocker) -> None:
+def test_table_exists_200(rest_mock: Mocker) -> None:
     rest_mock.head(
         f"{TEST_URI}v1/namespaces/fokko/tables/table",
         status_code=200,
         request_headers=TEST_HEADERS,
     )
     catalog = RestCatalog("rest", uri=TEST_URI, token=TEST_TOKEN)
-    assert catalog.table_exists(("fokko", "table"))
+    assert not catalog.table_exists(("fokko", "table"))
 
 
-def test_table_exist_204(rest_mock: Mocker) -> None:
+def test_table_exists_204(rest_mock: Mocker) -> None:
     rest_mock.head(
         f"{TEST_URI}v1/namespaces/fokko/tables/table",
         status_code=204,
@@ -721,16 +722,28 @@ def test_table_exist_204(rest_mock: Mocker) -> None:
     assert catalog.table_exists(("fokko", "table"))
 
 
-def test_table_exist_500(rest_mock: Mocker) -> None:
+def test_table_exists_404(rest_mock: Mocker) -> None:
     rest_mock.head(
         f"{TEST_URI}v1/namespaces/fokko/tables/table",
-        status_code=500,
+        status_code=404,
         request_headers=TEST_HEADERS,
     )
     catalog = RestCatalog("rest", uri=TEST_URI, token=TEST_TOKEN)
     assert not catalog.table_exists(("fokko", "table"))
 
 
+def test_table_exists_500(rest_mock: Mocker) -> None:
+    rest_mock.head(
+        f"{TEST_URI}v1/namespaces/fokko/tables/table",
+        status_code=500,
+        request_headers=TEST_HEADERS,
+    )
+    catalog = RestCatalog("rest", uri=TEST_URI, token=TEST_TOKEN)
+
+    with pytest.raises(ServerError):
+        catalog.table_exists(("fokko", "table"))
+
+
 def test_drop_table_404(rest_mock: Mocker) -> None:
     rest_mock.delete(
         f"{TEST_URI}v1/namespaces/fokko/tables/does_not_exists",