I was wondering how can I use NIST Statistical Test Suite to check for the randomness of output generated by a cryptographic hashing algorithm, let say SHA-256?
To be specific, how will I generate input for the suite? For block ciphers, we use key avalanche, plaintext and ciphertext avalanche, etc as inputs of the suite. Is same kind of inputs are used while evaluating a cryptographic hash algorithm, as for an S-box or block cipher?