1 files changed, 57 insertions, 1 deletions
diff --git a/lib/sqlalchemy/testing/suite/test_sequence.py b/lib/sqlalchemy/testing/suite/test_sequence.py
index 366d509cc..6c6ba5795 100644
--- a/lib/sqlalchemy/testing/suite/test_sequence.py
+++ b/lib/sqlalchemy/testing/suite/test_sequence.py
@@ -1,8 +1,9 @@
 from .. import fixtures, config
 from ..config import requirements
 from ..assertions import eq_
+from ... import testing
 
-from sqlalchemy import Integer, String, Sequence
+from ... import Integer, String, Sequence, schema
 
 from ..schema import Table, Column
 
@@ -68,3 +69,58 @@ class SequenceTest(fixtures.TablesTest):
             (1, "some data")
         )
 
+
+class HasSequenceTest(fixtures.TestBase):
+    __requires__ = 'sequences',
+
+    def test_has_sequence(self):
+        s1 = Sequence('user_id_seq')
+        testing.db.execute(schema.CreateSequence(s1))
+        try:
+            eq_(testing.db.dialect.has_sequence(testing.db,
+                'user_id_seq'), True)
+        finally:
+            testing.db.execute(schema.DropSequence(s1))
+
+    @testing.requires.schemas
+    def test_has_sequence_schema(self):
+        s1 = Sequence('user_id_seq', schema="test_schema")
+        testing.db.execute(schema.CreateSequence(s1))
+        try:
+            eq_(testing.db.dialect.has_sequence(testing.db,
+                'user_id_seq', schema="test_schema"), True)
+        finally:
+            testing.db.execute(schema.DropSequence(s1))
+
+    def test_has_sequence_neg(self):
+        eq_(testing.db.dialect.has_sequence(testing.db, 'user_id_seq'),
+            False)
+
+    @testing.requires.schemas
+    def test_has_sequence_schemas_neg(self):
+        eq_(testing.db.dialect.has_sequence(testing.db, 'user_id_seq',
+                            schema="test_schema"),
+            False)
+
+    @testing.requires.schemas
+    def test_has_sequence_default_not_in_remote(self):
+        s1 = Sequence('user_id_seq')
+        testing.db.execute(schema.CreateSequence(s1))
+        try:
+            eq_(testing.db.dialect.has_sequence(testing.db, 'user_id_seq',
+                            schema="test_schema"),
+                False)
+        finally:
+            testing.db.execute(schema.DropSequence(s1))
+
+    @testing.requires.schemas
+    def test_has_sequence_remote_not_in_default(self):
+        s1 = Sequence('user_id_seq', schema="test_schema")
+        testing.db.execute(schema.CreateSequence(s1))
+        try:
+            eq_(testing.db.dialect.has_sequence(testing.db, 'user_id_seq'),
+                False)
+        finally:
+            testing.db.execute(schema.DropSequence(s1))
+
+