public void GetOrAddCachedVersion_Caches_File_Hash()
        {
            var cache = new System.Web.Caching.Cache();
            var hash  = AssetVersionCache.GetOrAddCachedVersion("test.txt", cache);

            var assetCache = cache.Get("__AssetVersions__") as ConcurrentDictionary <string, string>;

            Assert.AreEqual(1, cache.Count);
            Assert.AreEqual(1, assetCache.Count);
            Assert.AreEqual("5b9VrKRrgLl2zwVdUOwhwihZ2cwlYdjQTqgEVV+G624=", assetCache["test.txt"]);
            Assert.AreEqual(hash, assetCache["test.txt"]);

            var cachedHash = AssetVersionCache.GetOrAddCachedVersion("test.txt", cache);

            Assert.AreEqual(1, assetCache.Count);
            Assert.AreEqual(hash, cachedHash);
        }
        public void ComputeHash_Returns_Sha256_Hash_of_File_Contents()
        {
            var hash = AssetVersionCache.ComputeHash("test.txt");

            Assert.AreEqual("5b9VrKRrgLl2zwVdUOwhwihZ2cwlYdjQTqgEVV+G624=", hash);
        }