BigQuery: Remove client-side enum validation.

Fixes googleapis#3725.

bigquery/google/cloud/bigquery/_helpers.py

@@ -306,19 +306,9 @@ def _validate(self, value):
 class _EnumProperty(_ConfigurationProperty):
     """Pseudo-enumeration class.
 
-    Subclasses must define ``ALLOWED`` as a class-level constant:  it must
-    be a sequence of strings.
-
     :type name: str
     :param name:  name of the property.
     """
-    def _validate(self, value):
-        """Check that ``value`` is one of the allowed values.
-
-        :raises: ValueError if value is not allowed.
-        """
-        if value not in self.ALLOWED:
-            raise ValueError('Pass one of: %s' % ', '.join(self.ALLOWED))
 
 
 class UDFResource(object):

bigquery/google/cloud/bigquery/job.py

@@ -98,36 +98,31 @@ class Compression(_EnumProperty):
     """Pseudo-enum for ``compression`` properties."""
     GZIP = 'GZIP'
     NONE = 'NONE'
-    ALLOWED = (GZIP, NONE)
 
 
 class CreateDisposition(_EnumProperty):
     """Pseudo-enum for ``create_disposition`` properties."""
     CREATE_IF_NEEDED = 'CREATE_IF_NEEDED'
     CREATE_NEVER = 'CREATE_NEVER'
-    ALLOWED = (CREATE_IF_NEEDED, CREATE_NEVER)
 
 
 class DestinationFormat(_EnumProperty):
     """Pseudo-enum for ``destination_format`` properties."""
     CSV = 'CSV'
     NEWLINE_DELIMITED_JSON = 'NEWLINE_DELIMITED_JSON'
     AVRO = 'AVRO'
-    ALLOWED = (CSV, NEWLINE_DELIMITED_JSON, AVRO)
 
 
 class Encoding(_EnumProperty):
     """Pseudo-enum for ``encoding`` properties."""
     UTF_8 = 'UTF-8'
     ISO_8559_1 = 'ISO-8559-1'
-    ALLOWED = (UTF_8, ISO_8559_1)
 
 
 class QueryPriority(_EnumProperty):
     """Pseudo-enum for ``QueryJob.priority`` property."""
     INTERACTIVE = 'INTERACTIVE'
     BATCH = 'BATCH'
-    ALLOWED = (INTERACTIVE, BATCH)
 
 
 class SourceFormat(_EnumProperty):
@@ -136,15 +131,13 @@ class SourceFormat(_EnumProperty):
     DATASTORE_BACKUP = 'DATASTORE_BACKUP'
     NEWLINE_DELIMITED_JSON = 'NEWLINE_DELIMITED_JSON'
     AVRO = 'AVRO'
-    ALLOWED = (CSV, DATASTORE_BACKUP, NEWLINE_DELIMITED_JSON, AVRO)
 
 
 class WriteDisposition(_EnumProperty):
     """Pseudo-enum for ``write_disposition`` properties."""
     WRITE_APPEND = 'WRITE_APPEND'
     WRITE_TRUNCATE = 'WRITE_TRUNCATE'
     WRITE_EMPTY = 'WRITE_EMPTY'
-    ALLOWED = (WRITE_APPEND, WRITE_TRUNCATE, WRITE_EMPTY)
 
 
 class _AsyncJob(google.cloud.future.polling.PollingFuture):

bigquery/tests/unit/test__helpers.py

@@ -765,7 +765,7 @@ def _get_target_class():
     def test_it(self):
 
         class Sub(self._get_target_class()):
-            ALLOWED = ('FOO', 'BAR', 'BAZ')
+            pass
 
         class Configuration(object):
             _attr = None
@@ -777,9 +777,6 @@ def __init__(self):
                 self._configuration = Configuration()
 
         wrapper = Wrapper()
-        with self.assertRaises(ValueError):
-            wrapper.attr = 'BOGUS'
-
         wrapper.attr = 'FOO'
         self.assertEqual(wrapper.attr, 'FOO')
         self.assertEqual(wrapper._configuration._attr, 'FOO')