Add VirtualMachineSizes collection

lib/fog/azurerm/compute.rb

@@ -54,6 +54,7 @@ class AzureRM < Fog::Service
       model :virtual_machine_extension
       collection :virtual_machine_extensions
       model :virtual_machine_size
+      collection :virtual_machine_sizes
       model :managed_disk
       collection :managed_disks
       model :data_disk

lib/fog/azurerm/models/compute/virtual_machine_size.rb

@@ -7,6 +7,10 @@ class VirtualMachineSize < Fog::Model
         attribute :number_of_cores
         attribute :os_disk_size_in_mb
         attribute :resource_disk_size_in_mb
+
+        def self.parse(virtual_machine_size)
+          get_hash_from_object(virtual_machine_size)
+        end
       end
     end
   end

lib/fog/azurerm/models/compute/virtual_machine_sizes.rb

@@ -0,0 +1,10 @@
+module Fog
+  module Compute
+    class AzureRM
+      class VirtualMachineSizes < Fog::Collection
+        attribute :location
+        model Fog::Compute::AzureRM::VirtualMachineSize
+      end
+    end
+  end
+end

test/models/compute/test_virtual_machine_size.rb

@@ -18,4 +18,11 @@ def test_model_attributes
       assert_respond_to @virtual_machine_size, attribute
     end
   end
+
+  def test_parse_method
+    virtual_machine_size_hash = Fog::Compute::AzureRM::VirtualMachineSize.parse(@response)
+    @response.instance_variables.each do |attribute|
+      assert_equal @response.instance_variable_get(attribute), virtual_machine_size_hash[attribute.to_s.delete('@')]
+    end
+  end
 end

test/models/compute/test_virtual_machine_sizes.rb

@@ -0,0 +1,12 @@
+require File.expand_path '../../test_helper', __dir__
+# Test class for Managed Disk Collection
+class TestVirtualMachineSizes < Minitest::Test
+  def setup
+    @service = Fog::Compute::AzureRM.new(credentials)
+    @virtual_machine_sizes = Fog::Compute::AzureRM::VirtualMachineSizes.new(location: 'location', service: @service)
+  end
+
+  def test_collection_attributes
+    assert_respond_to @virtual_machine_sizes, :location
+  end
+end