Fix typo: NotImplemented -> NotImplementedError

lib/gitlab/geo/health_check.rb

@@ -51,7 +51,7 @@ module Gitlab
       end
 
       def self.database_secondary?
-        raise NotImplemented unless Gitlab::Database.postgresql?
+        raise NotImplementedError unless Gitlab::Database.postgresql?
 
         ActiveRecord::Base.connection.execute('SELECT pg_is_in_recovery()')
           .first

spec/lib/gitlab/geo/health_check_spec.rb

@@ -6,6 +6,10 @@ describe Gitlab::Geo::HealthCheck do
   subject { described_class }
 
   describe '.perform_checks' do
+    before do
+      skip("Not using PostgreSQL") unless Gitlab::Database.postgresql?
+    end
+
     it 'returns an empty string when not running on a secondary node' do
       allow(Gitlab::Geo).to receive(:secondary?) { false }
 
@@ -38,4 +42,12 @@ describe Gitlab::Geo::HealthCheck do
       expect(subject.perform_checks).not_to be_blank
     end
   end
+
+  describe 'MySQL checks' do
+    it 'raises an error' do
+      allow(Gitlab::Database).to receive(:postgresql?) { false }
+
+      expect { subject.perform_checks }.to raise_error(NotImplementedError)
+    end
+  end
 end

spec/requests/api/geo_spec.rb

@@ -277,6 +277,10 @@ describe API::Geo, api: true do
     let!(:secondary_node) { create(:geo_node) }
     let(:request) { Gitlab::Geo::BaseRequest.new }
 
+    before do
+      skip("Not using PostgreSQL") unless Gitlab::Database.postgresql?
+    end
+
     it 'responds with 401 with invalid auth header' do
       get api('/geo/status'), nil, Authorization: 'Test'