ensure that necessary autoscaling processes are not suspended

lib/aws-missing-tools/aws-ha-release/aws-ha-release.rb

@@ -20,6 +20,12 @@ class AwsHaRelease
   end
 
   def execute!
+    %w(RemoveFromLoadBalancerLowPriority Terminate Launch HealthCheck AddToLoadBalancer).each do |process|
+      if @group.suspended_processes.keys.include? process
+        raise "AutoScaling process #{process} is currently suspended on #{@group.name} but is necessary for this script."
+      end
+    end
+
     @group.suspend_processes @processes_to_suspend
 
     if @group.max_size == @group.desired_capacity

spec/aws-missing-tools/aws-ha-release/aws-ha-release_spec.rb

@@ -46,7 +46,10 @@ describe 'aws-ha-release' do
       @aws_ha_release.execute!
     end
 
-    it 'requires certain autoscaling processes to not be suspended'
+    it 'requires certain autoscaling processes to not be suspended' do
+      @aws_ha_release.group.suspend_processes %w(RemoveFromLoadBalancerLowPriority Terminate Launch HealthCheck AddToLoadBalancer)
+      expect{ @aws_ha_release.execute! }.to raise_error
+    end
 
     it 'adjusts the max size as well as the desired capacity if the desired capacity is equal to it' do
       @group.update(max_size: 1, desired_capacity: 1)

spec/support/fake_auto_scaling.rb

@@ -22,7 +22,7 @@ module AWS
     end
 
     class Group
-      attr_reader :name, :max_size, :desired_capacity
+      attr_reader :name, :max_size, :desired_capacity, :suspended_processes
 
       def initialize(name)
         @name = name
@@ -31,7 +31,7 @@ module AWS
         @desired_capacity = 1
       end
 
-      def suspend_processes(*processes)
+      def suspend_processes(processes)
         processes.each do |process|
           @suspended_processes[process] = 'test'
         end