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diff --git a/spec/unit/checksum/storage/filesystem_spec.rb b/spec/unit/checksum/storage/filesystem_spec.rb
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+++ b/spec/unit/checksum/storage/filesystem_spec.rb
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+#
+# Author:: Daniel DeLeo (<dan@opscode.com>)
+# Copyright:: Copyright (c) 2010 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 'chef/checksum/storage/filesystem'
+
+describe Chef::Checksum::Storage::Filesystem do
+
+  before do
+    Chef::Log.logger = Logger.new(StringIO.new)
+
+    @now = Time.now
+
+    Time.stub!(:now).and_return(@now)
+
+    @checksum_of_the_file = "3fafecfb15585ede6b840158cbc2f399"
+    @storage = Chef::Checksum::Storage::Filesystem.new(Chef::Config.checksum_path, @checksum_of_the_file)
+  end
+
+  it "has the path to the file in the checksum repo" do
+    @storage.file_location.should == "/var/chef/checksums/3f/3fafecfb15585ede6b840158cbc2f399"
+  end
+
+  it "has the path the the file's subdirectory in the checksum repo" do
+    @storage.checksum_repo_directory.should == "/var/chef/checksums/3f"
+  end
+
+  it "commits a file from a given location to the checksum repo location" do
+    File.should_receive(:rename).with("/tmp/arbitrary_file_location", @storage.file_location)
+    FileUtils.should_receive(:mkdir_p).with("/var/chef/checksums/3f")
+
+    @storage.commit("/tmp/arbitrary_file_location")
+  end
+
+  it "reverts committing a file" do
+    File.should_receive(:rename).with("/tmp/arbitrary_file_location", @storage.file_location)
+    FileUtils.should_receive(:mkdir_p).with("/var/chef/checksums/3f")
+    @storage.commit("/tmp/arbitrary_file_location")
+
+    File.should_receive(:rename).with(@storage.file_location, "/tmp/arbitrary_file_location")
+    @storage.revert("/tmp/arbitrary_file_location")
+  end
+
+  it "deletes the file" do
+    FileUtils.should_receive(:rm).with(@storage.file_location)
+    @storage.purge
+  end
+
+  it "successfully purges even if its file has been deleted from the repo" do
+    FileUtils.should_receive(:rm).with(@storage.file_location).and_raise(Errno::ENOENT)
+    lambda {@storage.purge}.should_not raise_error
+  end
+
+end