Improve tests description

ee/spec/lib/ee/gitlab/usage_data_counters/hll_redis_counter_spec.rb

@@ -90,7 +90,7 @@ RSpec.describe Gitlab::UsageDataCounters::HLLRedisCounter, :clean_gitlab_redis_s
       end
     end
 
-    context 'with empty invalid context' do
+    context 'with invalid context' do
       it 'raise error' do
         expect { described_class.unique_events(event_names: context_event, start_date: 4.weeks.ago, end_date: Date.current, context: invalid_context) }.to raise_error(Gitlab::UsageDataCounters::HLLRedisCounter::InvalidContext)
       end

lib/gitlab/usage_data_counters/hll_redis_counter.rb

@@ -49,7 +49,7 @@ module Gitlab
 
         def track_event_in_context(value, event_name, context, time = Time.zone.now)
           return if context.blank?
-          return if context.present? && !context.in?(valid_context_list)
+          return unless context.in?(valid_context_list)
 
           track(value, event_name, context: context, time: time)
         end

spec/lib/gitlab/usage_data_counters/hll_redis_counter_spec.rb

@@ -319,7 +319,7 @@ RSpec.describe Gitlab::UsageDataCounters::HLLRedisCounter, :clean_gitlab_redis_s
       end
     end
 
-    context 'with empty invalid context' do
+    context 'with invalid context' do
       it 'raise error' do
         expect { described_class.unique_events(event_names: 'event_name_1', start_date: 4.weeks.ago, end_date: Date.current, context: invalid_context) }.to raise_error(Gitlab::UsageDataCounters::HLLRedisCounter::InvalidContext)
       end