6: {
			bucketName: bucket, objName: object, inputData: []byte(""),
			inputMeta:     map[string]string{"etag": "d41d8cd98f00b204e9800998ecf8427f"},
			expectedError: hash.BadDigest{ExpectedMD5: "d41d8cd98f00b204e9800998ecf8427f", CalculatedMD5: "d41d8cd98f00b204e9800998ecf8427e"},
		},

		// With incorrect sha256.
		7: {
			bucketName: bucket, objName: object, inputData: []byte("abcd"),

		// Test case - 12.
		// Input to replicate Md5 mismatch.
		{
			bucketName: bucket, objName: object, uploadID: uploadID, PartID: 1, inputMd5: "d41d8cd98f00b204e9800998ecf8427f",
			expectedError: hash.BadDigest{ExpectedMD5: "d41d8cd98f00b204e9800998ecf8427f", CalculatedMD5: "d41d8cd98f00b204e9800998ecf8427e"},
		},
		// Test case - 13.
		// When incorrect sha256 is provided.
		{

	// Buckets meta prefix.
	bucketMetaPrefix = "buckets"

	// Deleted Buckets prefix.
	deletedBucketsPrefix = ".deleted"

	// ETag (hex encoded md5sum) of empty string.
	emptyETag = "d41d8cd98f00b204e9800998ecf8427e"
)

// Global object layer mutex, used for safely updating object layer.
var globalObjLayerMutex sync.RWMutex

// Global object layer, only accessed by globalObjectAPI.
var globalObjectAPI ObjectLayer

          .put(Hashing.adler32(), "", "01000000")
          .put(Hashing.adler32(), TQBFJOTLD, "da0fdc5b")
          .put(Hashing.adler32(), TQBFJOTLDP, "0810e46b")
          .put(Hashing.md5(), "", "d41d8cd98f00b204e9800998ecf8427e")
          .put(Hashing.md5(), TQBFJOTLD, "9e107d9d372bb6826bd81d3542a419d6")
          .put(Hashing.md5(), TQBFJOTLDP, "e4d909c290d0fb1ca068ffaddf22cbd0")

    assertTrue(temp.delete());
  }

  public void testHash() throws IOException {
    File asciiFile = getTestFile("ascii.txt");
    File i18nFile = getTestFile("i18n.txt");

    String init = "d41d8cd98f00b204e9800998ecf8427e";
    assertEquals(init, Hashing.md5().newHasher().hash().toString());

    String asciiHash = "e5df5a39f2b8cb71b24e1d8038f93131";
    assertEquals(asciiHash, Files.hash(asciiFile, Hashing.md5()).toString());

          .put(Hashing.adler32(), "", "01000000")
          .put(Hashing.adler32(), TQBFJOTLD, "da0fdc5b")
          .put(Hashing.adler32(), TQBFJOTLDP, "0810e46b")
          .put(Hashing.md5(), "", "d41d8cd98f00b204e9800998ecf8427e")
          .put(Hashing.md5(), TQBFJOTLD, "9e107d9d372bb6826bd81d3542a419d6")
          .put(Hashing.md5(), TQBFJOTLDP, "e4d909c290d0fb1ca068ffaddf22cbd0")

    assertTrue(temp.delete());
  }

  public void testHash() throws IOException {
    File asciiFile = getTestFile("ascii.txt");
    File i18nFile = getTestFile("i18n.txt");

    String init = "d41d8cd98f00b204e9800998ecf8427e";
    assertEquals(init, Hashing.md5().newHasher().hash().toString());

    String asciiHash = "e5df5a39f2b8cb71b24e1d8038f93131";
    assertEquals(asciiHash, Files.hash(asciiFile, Hashing.md5()).toString());