Added high level view/migration tests.

Author: zacharyvoase

tests/views/README.md

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+This is a high-level test of the interaction between views and migrations in
+the development and deployment of a Django project. The database
+`postgresql://localhost/django_postgres_viewtest` needs to exist for this test
+to work.
+
+To run it, just do:
+
+    $ ./do_viewtest.sh
+    $ ./cleanup_viewtest.sh

tests/views/cleanup_viewtest.sh

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+#!/bin/bash
+
+DATABASE_URL="postgresql://localhost/django_postgres_viewtest"
+rm -Rf view_project_test/
+DROP_CMD=$(psql -P format=unaligned -P tuples_only -d "$DATABASE_URL" -c "select 'DROP TABLE \"' || array_to_string(array_agg(tablename), '\", \"') || '\" CASCADE;' from pg_tables where schemaname = 'public';")
+echo "$DROP_CMD"
+psql -d "$DATABASE_URL" -c "$DROP_CMD"

tests/views/do_viewtest.sh

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+#!/bin/bash
+
+set -e  # die on errors
+set -x  # echo commands as they run
+
+django-admin.py startproject view_project_test
+cd view_project_test
+
+virtualenv .venv
+. .venv/bin/activate
+pip install -r /dev/stdin <<EOF
+Django
+psycopg2
+dj-database-url
+south
+EOF
+(cd ../../../; python setup.py develop)
+
+export PYTHONPATH="$(pwd):$PYTHONPATH"
+export DJANGO_SETTINGS_MODULE=view_project_test.settings
+export DATABASE_URL="postgresql://localhost/django_postgres_viewtest"
+cat >> view_project_test/settings.py <<EOF
+import dj_database_url
+DATABASES = {'default': dj_database_url.config()}
+INSTALLED_APPS += type(INSTALLED_APPS)(['django_postgres', 'south', 'view_myapp'])
+EOF
+
+django-admin.py startapp view_myapp
+django-admin.py syncdb --noinput
+cat > view_myapp/models.py <<EOF
+from django.db import models
+import django_postgres
+
+class MyModel(models.Model):
+    field1 = models.CharField(max_length=50, default=' ')
+    field2 = models.CharField(max_length=49, default=' ')
+
+
+class MyView(django_postgres.View):
+    projection = ['view_myapp.MyModel.*']
+    sql = '''SELECT * FROM view_myapp_mymodel'''
+EOF
+django-admin.py schemamigration --initial view_myapp
+django-admin.py migrate view_myapp
+django-admin.py sync_pgviews
+
+# Make a breaking change
+sed -i '' -E 's/field2/field3/' view_myapp/models.py
+
+django-admin.py schemamigration --auto view_myapp
+django-admin.py migrate view_myapp
+django-admin.py sync_pgviews
+
+psql -d "$DATABASE_URL" -P tuples_only -c 'SELECT * FROM view_myapp_myview;'