try:
    import uhashlib as hashlib
except ImportError:
    try:
        import hashlib
    except ImportError:
        # This is neither uPy, nor cPy, so must be uPy with
        # uhashlib module disabled.
        print("SKIP")
        raise SystemExit


h = hashlib.sha256()
print(h.digest())

h = hashlib.sha256()
h.update(b"123")
print(h.digest())

h = hashlib.sha256()
h.update(b"abcd" * 1000)
print(h.digest())

print(hashlib.sha256(b"\xff" * 64).digest())

sha256 = hashlib.sha256(b'hello')
try:
    sha256.update(u'world')
except TypeError as e:
    print("TypeError")
print(sha256.digest())

# TODO: running .digest() several times in row is not supported()
#h = hashlib.sha256(b'123')
#print(h.digest())
#print(h.digest())

# TODO: partial digests are not supported
#h = hashlib.sha256(b'123')
#print(h.digest())
#h.update(b'456')
#print(h.digest())