Allow `rake cache:clear` clearing pipeline status cache

* Use the correct key prefix
* Clear old cache keys

TODO:

At some point we could remove clearing old cache keys.

1 files changed, 19 insertions, 0 deletions

diff --git a/spec/tasks/cache/clear/redis_spec.rb b/spec/tasks/cache/clear/redis_spec.rb
new file mode 100644
index 00000000000..cca2b864e9b
--- /dev/null
+++ b/spec/tasks/cache/clear/redis_spec.rb
@@ -0,0 +1,19 @@
+require 'rake_helper'
+
+describe 'clearing redis cache' do
+  before do
+    Rake.application.rake_require 'tasks/cache'
+  end
+
+  describe 'clearing pipeline status cache' do
+    let(:pipeline_status) { create(:ci_pipeline).project.pipeline_status }
+
+    before do
+      allow(pipeline_status).to receive(:loaded).and_return(nil)
+    end
+
+    it 'clears pipeline status cache' do
+      expect { run_rake_task('cache:clear:redis') }.to change { pipeline_status.has_cache? }
+    end
+  end
+end