Handle a ',' entered before any completions gracefully

Fixes #197

1 files changed, 8 insertions, 1 deletions

diff --git a/tests/test_sqlcompletion.py b/tests/test_sqlcompletion.py
index 5bd12daf..cae041fe 100644
--- a/tests/test_sqlcompletion.py
+++ b/tests/test_sqlcompletion.py
@@ -278,4 +278,11 @@ def test_specials_not_included_after_initial_token():
 def test_drop_schema_qualified_table_suggests_only_tables():
     text = 'DROP TABLE schema_name.table_name'
     suggestions = suggest_type(text, text)
-    assert suggestions == [{'type': 'table', 'schema': 'schema_name'}]
\ No newline at end of file
+    assert suggestions == [{'type': 'table', 'schema': 'schema_name'}]
+
+
+@pytest.mark.parametrize('text', [',', '  ,', 'sel ,'])
+def test_handle_pre_completion_comma_gracefully(text):
+    suggestions = suggest_type(text, text)
+
+    assert iter(suggestions)