- add test coverage for standalone MigrationContext / Operations

- ensure MigrationContext.configure can be used with a single connection
argument

1 files changed, 14 insertions, 2 deletions

diff --git a/tests/test_config.py b/tests/test_config.py
index fb54e8a..f0bd167 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -1,5 +1,7 @@
 from alembic import config
-from tests import eq_
+from alembic.migration import MigrationContext
+from alembic.operations import Operations
+from tests import eq_, capture_db
 
 def test_config_no_file_main_option():
     cfg = config.Config()
@@ -15,4 +17,14 @@ def test_config_no_file_section_option():
     eq_(cfg.get_section_option("foo", "url"), "postgresql://foo/bar")
 
     cfg.set_section_option("foo", "echo", "True")
-    eq_(cfg.get_section_option("foo", "echo"), "True")
\ No newline at end of file
+    eq_(cfg.get_section_option("foo", "echo"), "True")
+
+
+def test_standalone_op():
+    eng, buf = capture_db()
+
+    env = MigrationContext.configure(eng)
+    op = Operations(env)
+
+    op.alter_column("t", "c", nullable=True)
+    eq_(buf, ['ALTER TABLE t ALTER COLUMN c DROP NOT NULL'])