Use utc for time comparision

app/workers/wait_for_cluster_creation_worker.rb

@@ -11,7 +11,7 @@ class WaitForClusterCreationWorker
       Ci::FetchGcpOperationService.new.execute(cluster) do |operation|
         case operation.status
         when 'RUNNING'
-          if TIMEOUT < Time.zone.now - operation.start_time.to_time
+          if TIMEOUT < Time.now.utc - operation.start_time.to_time.utc
             return cluster.make_errored!("Cluster creation time exceeds timeout; #{TIMEOUT}")
           end
 

lib/google_api/cloud_platform/client.rb

@@ -5,6 +5,7 @@ module GoogleApi
     class Client < GoogleApi::Auth
       DEFAULT_MACHINE_TYPE = 'n1-standard-1'.freeze
       SCOPE = 'https://www.googleapis.com/auth/cloud-platform'.freeze
+      LEAST_TOKEN_LIFE_TIME = 10.minutes
 
       class << self
         def session_key_for_token
@@ -25,9 +26,7 @@ module GoogleApi
         return false unless expires_at
 
         # Making sure that the token will have been still alive during the cluster creation.
-        unless DateTime.strptime(expires_at, '%s').to_time > Time.now + 10.minutes
-          return false
-        end
+        return false if token_life_time(expires_at) < LEAST_TOKEN_LIFE_TIME
 
         true
       end
@@ -68,6 +67,12 @@ module GoogleApi
         m = self_link.match(%r{projects/.*/zones/.*/operations/(.*)})
         m[1] if m
       end
+
+      private
+
+      def token_life_time(expires_at)
+        DateTime.strptime(expires_at, '%s').to_time.utc - Time.now.utc
+      end
     end
   end
 end

spec/lib/google_api/cloud_platform/client_spec.rb

@@ -7,7 +7,7 @@ describe GoogleApi::CloudPlatform::Client do
   describe '#validate_token' do
     subject { client.validate_token(expires_at) }
 
-    let(:expires_at) { 1.hour.since.strftime('%s') }
+    let(:expires_at) { 1.hour.since.utc.strftime('%s') }
 
     context 'when token is nil' do
       let(:token) { nil }
@@ -26,7 +26,7 @@ describe GoogleApi::CloudPlatform::Client do
     end
 
     context 'when expires in 10 minutes' do
-      let(:expires_at) { 5.minutes.since.strftime('%s') }
+      let(:expires_at) { 5.minutes.since.utc.strftime('%s') }
 
       it { is_expected.to be_falsy }
     end

spec/workers/wait_for_cluster_creation_worker_spec.rb

@@ -24,7 +24,7 @@ describe WaitForClusterCreationWorker do
 
         context 'when operation timeout' do
           before do
-            allow(operation).to receive(:start_time).and_return(30.minutes.ago)
+            allow(operation).to receive(:start_time).and_return(30.minutes.ago.utc)
           end
 
           it 'sets an error message on cluster' do