public void DeleteUnusedKeyFlushesToDisk()
{
FileBasedDictionaryFileSystem fs = new FileBasedDictionaryFileSystem();
FileBasedDictionary <string, string> dut = CreateFileBasedDictionary(fs, TestEntry);
dut.RemoveAndFlush("UnusedKey");
fs.ExpectedFiles[MockEntryFileName].ReadAsString().ShouldEqual(TestEntry);
}