recipe/postgres: add missing test

slapos/test/recipe/test_postgres.py

+import unittest
+import tempfile
+import shutil
+import os.path
+import zc.buildout.testing
+
+
+class PostgresTest(unittest.TestCase):
+  def setUp(self):
+    self.buildout = buildout = zc.buildout.testing.Buildout()
+    self.pgdata_directory = tempfile.mkdtemp()
+    self.addCleanup(shutil.rmtree, self.pgdata_directory)
+    self.services_directory = tempfile.mkdtemp()
+    self.addCleanup(shutil.rmtree, self.services_directory)
+    buildout['postgres'] = {
+      'bin': 'software/parts/postgres/bin/',
+      'dbname': 'dbname',
+      'ipv4': '127.0.0.1',
+      'ipv6': '::1',
+      'port': '5443',
+      'pgdata-directory': self.pgdata_directory,
+      'services': self.services_directory,
+      'superuser': 'superuser',
+      'password': 'secret',
+    }
+    from slapos.recipe import postgres
+    self.recipe = postgres.Recipe(
+        buildout,
+        'postgres',
+        buildout['postgres'])
+
+  def test_options(self):
+    self.assertEqual(
+        'postgresql://superuser:secret@[::1]:5443/dbname',
+        self.buildout['postgres']['url'])
+
+  def test_install(self):
+    installed = self.recipe.install()
+
+    self.assertEqual(installed, [])
+
+    self.assertIn('postgresql.conf', os.listdir(self.pgdata_directory))
+    self.assertIn('pg_hba.conf', os.listdir(self.pgdata_directory))
+    self.assertIn('postgres-start', os.listdir(self.services_directory))