add unittests.

tests/test_aws.py

@@ -0,0 +1,112 @@
+import unittest
+import requests
+import boto.ec2
+from collections import namedtuple
+from helpers.aws import AWSConnection
+from requests.exceptions import RequestException
+import yaml
+
+
+class MockEc2Connection:
+
+    def __init__(self, error=False):
+        self.error = error
+
+    def get_all_volumes(self, filters):
+        if self.error:
+            raise Exception("get_all_volumes")
+        oid = namedtuple('Volume', 'id')
+        return [oid(id='a'), oid(id='b')]
+
+    def create_tags(self, objects, tags):
+        if self.error or len(objects) == 0:
+            raise Exception("create_tags")
+        return True
+
+
+class TestAWSConnection(unittest.TestCase):
+
+    def __init__(self, method_name='runTest'):
+        super(TestAWSConnection, self).__init__(method_name)
+
+    def set_error(self):
+        self.error = True
+
+    def set_ok(self):
+        self.error = False
+
+    def boto_ec2_connect_to_region(self, region):
+        return MockEc2Connection(self.error)
+
+    def requests_get(self, url, **kwargs):
+        if self.error:
+            raise RequestException("foo")
+        result = namedtuple('Request', 'ok content')
+        result.ok = True
+        if url.split('/')[-1] == 'availability-zone':
+            result.content = 'eu-west-1c'
+        else:
+            result.content = 'foo'
+        return result
+
+    def setUp(self):
+        self.error = False
+        requests.get = self.requests_get
+        boto.ec2.connect_to_region = self.boto_ec2_connect_to_region
+        self.config_string = """
+loop_wait: 10
+restapi:
+  listen: 0.0.0.0:8008
+  connect_address: 127.0.0.1:5432
+etcd:
+  scope: test
+  ttl: 30
+  host: 127.0.0.1:8080
+postgresql:
+  name: postgresql_foo
+  listen: 0.0.0.0:5432
+  connect_address: 127.0.0.1:5432
+  data_dir: /home/postgres/pgdata/data
+  replication:
+    username: standby
+    password: standby
+    network: 0.0.0.0/0
+  superuser:
+    password: zalando
+  admin:
+    username: admin
+    password: admin
+  parameters:
+    archive_mode: "on"
+    wal_level: hot_standby
+    max_wal_senders: 5
+    wal_keep_segments: 8
+    archive_timeout: 1800s
+    max_replication_slots: 5
+    hot_standby: "on"
+    ssl: "on"
+"""
+        self.conn = AWSConnection(yaml.load(self.config_string))
+
+    def test_aws_available(self):
+        self.assertTrue(self.conn.aws_available())
+
+    def test_on_role_change(self):
+        self.assertTrue(self.conn._tag_ebs('master'))
+        self.assertTrue(self.conn._tag_ec2('master'))
+        self.assertTrue(self.conn.on_role_change('master'))
+
+    def test_non_aws(self):
+        self.set_error()
+        conn = AWSConnection(yaml.load(self.config_string))
+        self.assertFalse(conn.aws_available())
+        self.assertFalse(conn._tag_ebs('master'))
+        self.assertFalse(conn._tag_ec2('master'))
+
+    def test_aws_tag_ebs_error(self):
+        self.set_error()
+        self.assertFalse(self.conn._tag_ebs("master"))
+
+    def test_aws_tag_ec2_error(self):
+        self.set_error()
+        self.assertFalse(self.conn._tag_ec2("master"))