Fix remaining failures in shoulda-matcher

Starting with Rails 5, belongs_to now adds a presence validation to the
association, and so as of shoulda-matchers 4.0.0 the belong_to matcher
follows suit and tests that this validation is there by setting the
association to nil and asserting that there are validation errors. This
exposed an error with the `validate_branches` method: we need to check
the source and target project exist.

1 files changed, 1 insertions, 1 deletions

diff --git a/spec/models/environment_spec.rb b/spec/models/environment_spec.rb
index 17246f238e0..7233d2454c6 100644
--- a/spec/models/environment_spec.rb
+++ b/spec/models/environment_spec.rb
@@ -6,7 +6,7 @@ describe Environment do
   let(:project) { create(:project, :stubbed_repository) }
   subject(:environment) { create(:environment, project: project) }
 
-  it { is_expected.to belong_to(:project) }
+  it { is_expected.to belong_to(:project).required }
   it { is_expected.to have_many(:deployments) }
 
   it { is_expected.to delegate_method(:stop_action).to(:last_deployment) }