[compute|aws] Fix & improve some tests.

Use m1.small flavor with gentoo ami; smallest
flavor that supports instance storage.

Expect nullable strings for these attributes:
* snapshot descriptions
* tag descriptions
* volume snapshotIds

Whitespace cleanup.

tests/compute/models/aws/address_tests.rb

@@ -1,8 +1,8 @@
 Shindo.tests("AWS::Compute | address", ['aws']) do
 
   model_tests(AWS[:compute].addresses, {}, true) do
-                 
-    @server = AWS[:compute].servers.create(:image_id => GENTOO_AMI)
+
+    @server = AWS[:compute].servers.create(:image_id => GENTOO_AMI, :flavor_id => 'm1.small')
     @server.wait_for { ready? }
 
     tests('#server=').succeeds do

tests/compute/models/aws/snapshot_tests.rb

@@ -4,7 +4,7 @@ Shindo.tests("AWS::Compute | snapshot", ['aws']) do
   @volume.wait_for { ready? }
 
   model_tests(AWS[:compute].snapshots, {:volume_id => @volume.identity}, true)
-                    
+
   @volume.destroy
 
-end
+end

tests/compute/models/aws/volume_tests.rb

@@ -1,12 +1,12 @@
 Shindo.tests("AWS::Compute | volume", ['aws']) do
 
-  @server = AWS[:compute].servers.create(:image_id => GENTOO_AMI)
+  @server = AWS[:compute].servers.create(:image_id => GENTOO_AMI, :flavor_id => 'm1.small')
   @server.wait_for { ready? }
 
   model_tests(AWS[:compute].volumes, {:availability_zone => @server.availability_zone, :size => 1, :device => '/dev/sdz1'}, true) do
 
     @instance.wait_for { ready? }
-                      
+
     tests('#server = @server').succeeds do
       @instance.server = @server
     end
@@ -23,4 +23,4 @@ Shindo.tests("AWS::Compute | volume", ['aws']) do
 
   @server.destroy
 
-end
+end

tests/compute/requests/aws/address_tests.rb

@@ -8,7 +8,7 @@ Shindo.tests('AWS::Compute | address requests', ['aws']) do
     'requestId' => String
   }
 
-  @server = AWS[:compute].servers.create(:image_id => GENTOO_AMI)
+  @server = AWS[:compute].servers.create(:image_id => GENTOO_AMI, :flavor_id => 'm1.small')
   @server.wait_for { ready? }
   @ip_address = @server.ip_address
 

tests/compute/requests/aws/snapshot_tests.rb

@@ -1,7 +1,7 @@
 Shindo.tests('AWS::Compute | snapshot requests', ['aws']) do
 
   @snapshot_format = {
-    'description' => NilClass,
+    'description' => Fog::Nullable::String,
     'ownerId'     => String,
     'progress'    => String,
     'snapshotId'  => String,

tests/compute/requests/aws/tag_tests.rb

@@ -5,7 +5,7 @@ Shindo.tests('AWS::Compute | tag requests', ['aws']) do
       'key'          => String,
       'resourceId'   => String,
       'resourceType' => String,
-      'value'        => String
+      'value'        => Fog::Nullable::String
     }],
     'requestId' => String
   }

tests/compute/requests/aws/volume_tests.rb

@@ -5,7 +5,7 @@ Shindo.tests('AWS::Compute | volume requests', ['aws']) do
     'createTime'        => Time,
     'requestId'         => String,
     'size'              => Integer,
-    'snapshotId'        => NilClass,
+    'snapshotId'        => Fog::Nullable::String,
     'status'            => String,
     'volumeId'          => String
   }
@@ -25,7 +25,7 @@ Shindo.tests('AWS::Compute | volume requests', ['aws']) do
       'attachmentSet'     => [],
       'createTime'        => Time,
       'size'              => Integer,
-      'snapshotId'        => NilClass,
+      'snapshotId'        => Fog::Nullable::String,
       'status'            => String,
       'tagSet'            => {},
       'volumeId'          => String
@@ -33,7 +33,7 @@ Shindo.tests('AWS::Compute | volume requests', ['aws']) do
     'requestId' => String
   }
 
-  @server = AWS[:compute].servers.create(:image_id => GENTOO_AMI)
+  @server = AWS[:compute].servers.create(:image_id => GENTOO_AMI, :flavor_id => 'm1.small')
   @server.wait_for { ready? }
 
   tests('success') do