add testcase: drop table

tests/test_project/app_drop_table/migrations/0001_initial.py

@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.18 on 2019-04-14 14:59
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = []
+
+    operations = [
+        migrations.CreateModel(
+            name="A",
+            fields=[
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("field_a", models.IntegerField()),
+            ],
+        )
+    ]

tests/test_project/app_drop_table/migrations/0002_delete_a.py

@@ -0,0 +1,16 @@
+# Generated by Django 2.1.10 on 2019-07-19 09:50
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('app_drop_table', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.DeleteModel(
+            name='A',
+        ),
+    ]