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diff --git a/spec/unit/resource_platform_map_spec.rb b/spec/unit/resource_platform_map_spec.rb
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+++ b/spec/unit/resource_platform_map_spec.rb
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+#
+# Author:: Seth Chisamore (<schisamo@opscode.com>)
+# Copyright:: Copyright (c) 2011 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 CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require 'spec_helper'
+
+describe Chef::Resource::PlatformMap do
+
+  before(:each) do
+    @platform_map = Chef::Resource::PlatformMap.new({
+      :windows => {
+        "6.1" => {
+          :file => "softiefile",
+          :else => "thing"
+        },
+        :default => {
+          :file => Chef::Resource::File,
+          :ping => "pong",
+          :cat => "nice"
+        }
+      },
+      :pop_tron => {
+      },
+      :default => {
+        :soundwave => "lazerbeak",
+        :directory => Chef::Resource::Directory,
+      }
+    })
+  end
+
+  describe 'filtering the map' do
+    it "returns resources for platform and version" do
+      pmap = @platform_map.filter("Windows", "6.1")
+      pmap.should be_a_kind_of(Hash)
+      pmap[:file].should eql("softiefile")
+    end
+
+    it "returns platform default resources if version does not exist" do
+      pmap = @platform_map.filter("windows", "1")
+      pmap.should be_a_kind_of(Hash)
+      pmap[:file].should eql(Chef::Resource::File)
+    end
+
+    it "returns global default resources if none exist for plaform" do
+      pmap = @platform_map.filter("pop_tron", "1")
+      pmap.should be_a_kind_of(Hash)
+      pmap[:directory].should eql(Chef::Resource::Directory)
+    end
+
+    it "returns global default resources if platform does not exist" do
+      pmap = @platform_map.filter("BeOS", "1")
+      pmap.should be_a_kind_of(Hash)
+      pmap[:soundwave].should eql("lazerbeak")
+    end
+
+    it "returns a merged map of platform version and plaform default resources" do
+      pmap = @platform_map.filter("Windows", "6.1")
+      pmap[:file].should eql("softiefile")
+      pmap[:ping].should eql("pong")
+    end
+
+    it "returns a merged map of platform specific version and global defaults" do
+      pmap = @platform_map.filter("Windows", "6.1")
+      pmap[:file].should eql("softiefile")
+      pmap[:soundwave].should eql("lazerbeak")
+    end
+  end
+
+  describe 'finding a resource' do
+    it "returns a resource for a platform directly by short name" do
+      @platform_map.get(:file, "windows", "6.1").should eql("softiefile")
+    end
+
+    it "returns a default resource if platform and version don't exist" do
+      @platform_map.get(:remote_file).should eql(Chef::Resource::RemoteFile)
+    end
+
+    it "raises an exception if a resource cannot be found" do
+      lambda { @platform_map.get(:coffee, "windows", "6.1")}.should raise_error(NameError)
+    end
+
+    it "returns a resource with a Chef::Resource object" do
+      kitty = Chef::Resource::Cat.new("loulou")
+      @platform_map.get(kitty, "windows", "6.1").should eql("nice")
+    end
+  end
+
+  describe 'building the map' do
+    it "allows passing of a resource map at creation time" do
+      @new_map = Chef::Resource::PlatformMap.new({:the_dude => {:default => 'abides'}})
+      @new_map.map[:the_dude][:default].should eql("abides")
+    end
+
+    it "defaults to a resource map with :default key" do
+      @new_map = Chef::Resource::PlatformMap.new
+      @new_map.map.has_key?(:default)
+    end
+
+    it "updates the resource map with a map" do
+      @platform_map.set(
+       :platform => :darwin,
+       :version => "9.2.2",
+       :short_name => :file,
+       :resource => "masterful"
+      )
+      @platform_map.map[:darwin]["9.2.2"][:file].should eql("masterful")
+
+      @platform_map.set(
+       :platform => :darwin,
+       :short_name => :file,
+       :resource => "masterful"
+      )
+      @platform_map.map[:darwin][:default][:file].should eql("masterful")
+
+      @platform_map.set(
+       :short_name => :file,
+       :resource => "masterful"
+      )
+      @platform_map.map[:default][:file].should eql("masterful")
+
+      @platform_map.set(
+       :platform => :hero,
+       :version => "9.2.2",
+       :short_name => :file,
+       :resource => "masterful"
+      )
+      @platform_map.map[:hero]["9.2.2"][:file].should eql("masterful")
+
+      @platform_map.set(
+        :short_name => :file,
+        :resource => "masterful"
+      )
+      @platform_map.map[:default][:file].should eql("masterful")
+
+      @platform_map.set(
+       :short_name => :file,
+       :resource => "masterful"
+      )
+      @platform_map.map[:default][:file].should eql("masterful")
+
+      @platform_map.set(
+        :platform => :neurosis,
+        :short_name => :package,
+        :resource => "masterful"
+      )
+      @platform_map.map[:neurosis][:default][:package].should eql("masterful")
+    end
+  end
+
+end