Add app_data_migration used for tests

tests/test_project/app_data_migrations/admin.py

@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.

tests/test_project/app_data_migrations/apps.py

@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class AppDataMigrationsConfig(AppConfig):
+    name = "tests.test_project.app_data_migrations"

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

@@ -0,0 +1,28 @@
+# Generated by Django 2.2 on 2020-01-26 17:43
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = []
+
+    operations = [
+        migrations.CreateModel(
+            name="MyModel",
+            fields=[
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("myfield", models.IntegerField()),
+            ],
+        ),
+    ]

tests/test_project/app_data_migrations/migrations/0002_missing_reverse.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2 on 2020-01-26 17:43
+
+from django.db import migrations
+
+
+def update_things(apps, schema_editor):
+    pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("app_data_migrations", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.RunPython(update_things),
+    ]

tests/test_project/app_data_migrations/migrations/0003_incorrect_arguments.py

@@ -0,0 +1,22 @@
+# Generated by Django 2.2 on 2020-01-26 17:47
+
+from django.db import migrations
+
+
+def backward_weirdly_named(david, test):
+    pass
+
+
+def forward_weird_name(arg1, arg2):
+    pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("app_data_migrations", "0002_missing_reverse"),
+    ]
+
+    operations = [
+        migrations.RunPython(forward_weird_name, backward_weirdly_named),
+    ]

tests/test_project/app_data_migrations/models.py

@@ -0,0 +1,5 @@
+from django.db import models
+
+
+class MyModel(models.Model):
+    myfield = models.IntegerField()

tests/test_project/app_data_migrations/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

tests/test_project/app_data_migrations/views.py

@@ -0,0 +1,3 @@
+from django.shortcuts import render
+
+# Create your views here.