Check for filetype only for pattern and fix coverage (#872)

# Description
## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->
Currently is filetype is passed then pattern doesn't need to be resolved
to check native autodetect

<!--
Issues are required for both bug fixes and features.
Reference it using one of the following:

closes: #ISSUE
related: #ISSUE
-->
closes: #873


## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- Create file type in case not provided before checking for native
autodetect schema


## Does this introduce a breaking change?
No

### Checklist
- [x] Created tests which fail without the change (if possible)
- [x] Extended the README / documentation, if necessary

Co-authored-by: Kaxil Naik <kaxilnaik@gmail.com>

python-sdk/src/astro/databases/base.py

@@ -19,6 +19,7 @@
 from astro.exceptions import DatabaseCustomError, NonExistentTableException
 from astro.files import File, resolve_file_path_pattern
 from astro.files.types import create_file_type
+from astro.files.types.base import FileType as FileTypeConstants
 from astro.settings import LOAD_TABLE_AUTODETECT_ROWS_COUNT, SCHEMA
 from astro.sql.table import BaseTable, Metadata
 from pandas.io.sql import SQLDatabase
@@ -744,11 +745,14 @@ def check_schema_autodetection_is_supported(self, source_file: File) -> bool:
             source_file.location.location_type
         )
 
-        source_filetype = create_file_type(
-            path=source_file.path, filetype=source_file.type.name
+        source_filetype = (
+            source_file
+            if isinstance(source_file.type, FileTypeConstants)
+            else create_file_type(path=source_file.path, filetype=source_file.type)  # type: ignore
         )
+
         is_source_filetype_supported = (
-            (source_filetype in filetype_supported.get("filetype"))  # type: ignore
+            (source_filetype.type.name in filetype_supported.get("filetype"))  # type: ignore
             if filetype_supported
             else None
         )

python-sdk/tests/databases/test_base_database.py

@@ -59,6 +59,26 @@ def test_create_table_using_columns_raises_exception():
     assert exc_info.match("To use this method, table.columns must be defined")
 
 
+def test_check_schema_autodetection_is_supported():
+    """
+    Test the condition native schema autodetection for files and prefixes
+    """
+    db = create_database("gcp_conn")
+    assert db.check_schema_autodetection_is_supported(
+        source_file=File(path="gs://bucket/prefix", filetype=FileType.CSV)
+    )
+
+    assert db.check_schema_autodetection_is_supported(
+        source_file=File(path="gs://bucket/prefix/key.csv")
+    )
+
+    assert not (
+        db.check_schema_autodetection_is_supported(
+            source_file=File(path="s3://bucket/prefix/key.csv")
+        )
+    )
+
+
 def test_subclass_missing_append_table_raises_exception():
     db = DatabaseSubclass(conn_id="fake_conn_id")
     source_table = Table()