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diff --git a/spec/unit/chef_fs/file_system_spec.rb b/spec/unit/chef_fs/file_system_spec.rb
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+++ b/spec/unit/chef_fs/file_system_spec.rb
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+#
+# Author:: John Keiser (<jkeiser@opscode.com>)
+# Copyright:: Copyright (c) 2012 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'
+require 'support/shared/unit/file_system_support'
+require 'chef/chef_fs/file_system'
+require 'chef/chef_fs/file_pattern'
+
+describe Chef::ChefFS::FileSystem do
+  include FileSystemSupport
+
+  context 'with empty filesystem' do
+    let(:fs) { memory_fs('', {}) }
+
+    context 'list' do
+      it '/' do
+        list_should_yield_paths(fs, '/', '/')
+      end
+      it '/a' do
+        list_should_yield_paths(fs, '/a', '/a')
+      end
+      it '/a/b' do
+        list_should_yield_paths(fs, '/a/b')
+      end
+      it '/*' do
+        list_should_yield_paths(fs, '/*', '/')
+      end
+    end
+
+    context 'resolve_path' do
+      it '/' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/').path.should == '/'
+      end
+      it 'nonexistent /a' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/a').path.should == '/a'
+      end
+      it 'nonexistent /a/b' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/a/b').path.should == '/a/b'
+      end
+    end
+  end
+
+  context 'with a populated filesystem' do
+    let(:fs) {
+      memory_fs('', {
+        :a => {
+          :aa => {
+            :c => '',
+            :zz => ''
+          },
+          :ab => {
+            :c => '',
+          }
+        },
+        :x => ''
+      })
+    }
+    context 'list' do
+      it '/**' do
+        list_should_yield_paths(fs, '/**', '/', '/a', '/x', '/a/aa', '/a/aa/c', '/a/aa/zz', '/a/ab', '/a/ab/c')
+      end
+      it '/' do
+        list_should_yield_paths(fs, '/', '/')
+      end
+      it '/*' do
+        list_should_yield_paths(fs, '/*', '/', '/a', '/x')
+      end
+      it '/*/*' do
+        list_should_yield_paths(fs, '/*/*', '/a/aa', '/a/ab')
+      end
+      it '/*/*/*' do
+        list_should_yield_paths(fs, '/*/*/*', '/a/aa/c', '/a/aa/zz', '/a/ab/c')
+      end
+      it '/*/*/?' do
+        list_should_yield_paths(fs, '/*/*/?', '/a/aa/c', '/a/ab/c')
+      end
+      it '/a/*/c' do
+        list_should_yield_paths(fs, '/a/*/c', '/a/aa/c', '/a/ab/c')
+      end
+      it '/**b/c' do
+        list_should_yield_paths(fs, '/**b/c', '/a/ab/c')
+      end
+      it '/a/ab/c' do
+        no_blocking_calls_allowed
+        list_should_yield_paths(fs, '/a/ab/c', '/a/ab/c')
+      end
+      it 'nonexistent /a/ab/blah' do
+        no_blocking_calls_allowed
+        list_should_yield_paths(fs, '/a/ab/blah', '/a/ab/blah')
+      end
+      it 'nonexistent /a/ab/blah/bjork' do
+        no_blocking_calls_allowed
+        list_should_yield_paths(fs, '/a/ab/blah/bjork')
+      end
+    end
+
+    context 'resolve_path' do
+      before(:each) do
+        no_blocking_calls_allowed
+      end
+      it 'resolves /' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/').path.should == '/'
+      end
+      it 'resolves /x' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/x').path.should == '/x'
+      end
+      it 'resolves /a' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/a').path.should == '/a'
+      end
+      it 'resolves /a/aa' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/a/aa').path.should == '/a/aa'
+      end
+      it 'resolves /a/aa/zz' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/a/aa/zz').path.should == '/a/aa/zz'
+      end
+      it 'resolves nonexistent /y/x/w' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/y/x/w').path.should == '/y/x/w'
+      end
+    end
+  end
+end