simple spec for fetch_json_with_cache
use other API in specs to fetch
prevent app crashing if episodes hash is nil or blank
use datetime class to remove podcasts that not upcoming
more specs for stream_helper. However they fail.
add database_cleaner gem and create new test group in gemfile
new gem database_cleaner. but does not work yet because of this bug: https://github.com/bmabey/database_cleaner/issues/224
therefore not in use yet
first integration test spec example
database_cleaner works for version < 1.1.0
add contexts for index spec and add spec for links to streams
check for link to the impressum at index page
create some stub feature spec files