for i, tt := range testCases {
		chunkSize, chunkSignature, err := readChunkLine(tt.reader)
		if err != tt.expectedErr {
			t.Errorf("Test %d: Expected %s, got %s", i+1, tt.expectedErr, err)
		}
		if !bytes.Equal(chunkSize, tt.chunkSize) {
			t.Errorf("Test %d: Expected %s, got %s", i+1, string(tt.chunkSize), string(chunkSize))
		}
		if !bytes.Equal(chunkSignature, tt.chunkSignature) {