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2026-09-14 23:22:10 +09:00
commit 9f9c8fb69b
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+"""Test against the builders in the op.* module."""
+
+from sqlalchemy import Column
+from sqlalchemy import event
+from sqlalchemy import Integer
+from sqlalchemy import String
+from sqlalchemy import Table
+from sqlalchemy.sql import text
+
+from ...testing.fixtures import AlterColRoundTripFixture
+from ...testing.fixtures import TestBase
+
+
+@event.listens_for(Table, "after_parent_attach")
+def _add_cols(table, metadata):
+    if table.name == "tbl_with_auto_appended_column":
+        table.append_column(Column("bat", Integer))
+
+
+class BackendAlterColumnTest(AlterColRoundTripFixture, TestBase):
+    __backend__ = True
+
+    def test_rename_column(self):
+        self._run_alter_col({}, {"name": "newname"})
+
+    def test_modify_type_int_str(self):
+        self._run_alter_col({"type": Integer()}, {"type": String(50)})
+
+    def test_add_server_default_int(self):
+        self._run_alter_col({"type": Integer}, {"server_default": text("5")})
+
+    def test_modify_server_default_int(self):
+        self._run_alter_col(
+            {"type": Integer, "server_default": text("2")},
+            {"server_default": text("5")},
+        )
+
+    def test_modify_nullable_to_non(self):
+        self._run_alter_col({}, {"nullable": False})
+
+    def test_modify_non_nullable_to_nullable(self):
+        self._run_alter_col({"nullable": False}, {"nullable": True})