OHAI-434: Add unit tests for Ec2Metadata#best_api_version

1 files changed, 72 insertions, 0 deletions

diff --git a/spec/unit/mixin/ec2_metadata_spec.rb b/spec/unit/mixin/ec2_metadata_spec.rb
new file mode 100644
index 00000000..0d2060c7
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+++ b/spec/unit/mixin/ec2_metadata_spec.rb
@@ -0,0 +1,72 @@
+#
+# Author:: Bryan McLellan <btm@loftninjas.org>
+# Copyright:: Copyright (c) 2013 Opscode, Inc.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDIT"Net::HTTP Response"NS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require File.expand_path(File.dirname(__FILE__) + '/../../spec_helper.rb')
+require 'ohai/mixin/ec2_metadata'
+
+describe Ohai::Mixin::Ec2Metadata do
+  let(:mixin) { 
+    metadata_object = Object.new.extend(Ohai::Mixin::Ec2Metadata)
+    http_client = mock("Net::HTTP client")
+    http_client.stub!(:get).and_return(response)
+    metadata_object.stub!(:http_client).and_return(http_client)
+    metadata_object
+  }
+
+  context "#best_api_version" do
+    context "with a sorted list of metadata versions" do
+      let(:response) { mock("Net::HTTP Response", :body => "1.0\n2011-05-01\n2012-01-12\nUnsupported", :code => "200") }
+  
+      it "returns the most recent version" do
+        mixin.best_api_version.should == "2012-01-12"
+      end
+    end
+  
+    context "with an unsorted list of metadata versions" do
+      let(:response) { mock("Net::HTTP Response", :body => "1.0\n2009-04-04\n2007-03-01\n2011-05-01\n2008-09-01\nUnsupported", :code => "200") }
+  
+      it "returns the most recent version" do
+        mixin.best_api_version.should == "2011-05-01"
+      end
+    end
+  
+    context "when no supported versions are found" do
+      let(:response) { mock("Net::HTTP Response", :body => "2020-01-01\nUnsupported", :code => "200") }
+  
+      it "raises an error" do
+        lambda { mixin.best_api_version}.should raise_error
+      end
+    end
+  
+    context "when the response code is 404" do
+      let(:response) { mock("Net::HTTP Response", :body => "1.0\n2011-05-01\n2012-01-12\nUnsupported", :code => "404") }
+  
+      it "raises an error" do
+        lambda { mixin.best_api_version}.should raise_error
+      end
+    end
+  
+    context "when the response code is unexpected" do
+      let(:response) { mock("Net::HTTP Response", :body => "1.0\n2011-05-01\n2012-01-12\nUnsupported", :code => "418") }
+  
+      it "raises an error" do
+        lambda { mixin.best_api_version}.should raise_error
+      end
+    end
+  end
+end