Make the app config more powerful in terms of injecting fake dependencies. Refactor the tests to use metaclasses and to actually all run.

app.py

@@ -7,7 +7,8 @@ from flask.ext.principal import Principal
 from flask.ext.login import LoginManager
 from flask.ext.mail import Mail
 
-from config import ProductionConfig, DebugConfig, LocalHostedConfig
+from config import (ProductionConfig, DebugConfig, LocalHostedConfig,
+                    TestConfig)
 from util import analytics
 
 
@@ -22,6 +23,9 @@ if stack.startswith('prod'):
 elif stack.startswith('localhosted'):
   logger.info('Running with debug config on production data.')
   config = LocalHostedConfig()
+elif stack.startswith('test'):
+  logger.info('Running with test config on ephemeral data.')
+  config = TestConfig()
 else:
   logger.info('Running with debug config.')
   config = DebugConfig()
@@ -36,6 +40,6 @@ login_manager.init_app(app)
 mail = Mail()
 mail.init_app(app)
 
-stripe.api_key = app.config['STRIPE_SECRET_KEY']
+stripe.api_key = app.config.get('STRIPE_SECRET_KEY', None)
 
-mixpanel = analytics.init_app(app)
+mixpanel = app.config['ANALYTICS'].init_app(app)