1 files changed, 55 insertions, 0 deletions
diff --git a/spec/lib/gitlab/redis/trace_chunks_spec.rb b/spec/lib/gitlab/redis/trace_chunks_spec.rb
new file mode 100644
index 00000000000..e974dc519d6
--- /dev/null
+++ b/spec/lib/gitlab/redis/trace_chunks_spec.rb
@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Redis::TraceChunks do
+  let(:instance_specific_config_file) { "config/redis.trace_chunks.yml" }
+  let(:environment_config_file_name) { "GITLAB_REDIS_TRACE_CHUNKS_CONFIG_FILE" }
+  let(:shared_state_config_file) { nil }
+
+  before do
+    allow(Gitlab::Redis::SharedState).to receive(:config_file_name).and_return(shared_state_config_file)
+  end
+
+  include_examples "redis_shared_examples"
+
+  describe '.config_file_name' do
+    subject { described_class.config_file_name }
+
+    let(:rails_root) { Dir.mktmpdir('redis_shared_examples') }
+
+    before do
+      # Undo top-level stub of config_file_name because we are testing that method now.
+      allow(described_class).to receive(:config_file_name).and_call_original
+
+      allow(described_class).to receive(:rails_root).and_return(rails_root)
+      FileUtils.mkdir_p(File.join(rails_root, 'config'))
+    end
+
+    after do
+      FileUtils.rm_rf(rails_root)
+    end
+
+    context 'when there is only a resque.yml' do
+      before do
+        FileUtils.touch(File.join(rails_root, 'config/resque.yml'))
+      end
+
+      it { expect(subject).to eq("#{rails_root}/config/resque.yml") }
+
+      context 'and there is a global env override' do
+        before do
+          stub_env('GITLAB_REDIS_CONFIG_FILE', 'global override')
+        end
+
+        it { expect(subject).to eq('global override') }
+
+        context 'and SharedState has a different config file' do
+          let(:shared_state_config_file) { 'shared state config file' }
+
+          it { expect(subject).to eq('shared state config file') }
+        end
+      end
+    end
+  end
+end