use FailedPreCondition instead of NotFound

Author: chandra-siri

google/cloud/storage/_experimental/asyncio/_utils.py

@@ -20,15 +20,15 @@ def raise_if_no_fast_crc32c():
     """Check if the C-accelerated version of google-crc32c is available.
 
     If not, raise an error to prevent silent performance degradation.
-    
-    raises google.api_core.exceptions.NotFound: If the C extension is not available.
+
+    raises google.api_core.exceptions.FailedPrecondition: If the C extension is not available.
     returns: True if the C extension is available.
     rtype: bool
     
     """
     if google_crc32c.implementation != "c":
-        raise exceptions.NotFound(
+        raise exceptions.FailedPrecondition(
             "The google-crc32c package is not installed with C support. "
-            "Bidi reads require the C extension for data integrity checks."
+            "C extension is required for faster data integrity checks."
             "For more information, see https://github.com/googleapis/python-crc32c."
         )

tests/unit/asyncio/test_async_appendable_object_writer.py

@@ -95,7 +95,7 @@ def test_init_raises_if_crc32c_c_extension_is_missing(
 ):
     mock_google_crc32c.implementation = "python"
 
-    with pytest.raises(exceptions.NotFound) as exc_info:
+    with pytest.raises(exceptions.FailedPrecondition) as exc_info:
         AsyncAppendableObjectWriter(mock_grpc_client, "bucket", "object")
 
     assert "The google-crc32c package is not installed with C support" in str(

tests/unit/asyncio/test_async_multi_range_downloader.py

@@ -358,7 +358,7 @@ def test_init_raises_if_crc32c_c_extension_is_missing(
     ):
         mock_google_crc32c.implementation = "python"
 
-        with pytest.raises(exceptions.NotFound) as exc_info:
+        with pytest.raises(exceptions.FailedPrecondition) as exc_info:
             AsyncMultiRangeDownloader(mock_grpc_client, "bucket", "object")
 
         assert "The google-crc32c package is not installed with C support" in str(