Max from two numbers in range, or zero

def maxfromrange(a,b,limitmin=10,limitmax=20): #limit inclusive in range
  atest=a in range(limitmin, limitmax+1)
  btest=b in range (limitmin, limitmax+1)
  if atest and btest:
    return(a if a>b else b)
  elif not atest and not btest:
    return(0)
  else:
    return(a*atest + b*btest)

print (maxfromrange(11,19))
print (maxfromrange(19,11))
print (maxfromrange(11,9))
print (maxfromrange(11,21))
print (maxfromrange(9,21))
print (maxfromrange(10,21))
print (maxfromrange(21,10))
print (maxfromrange(23,10))
print (maxfromrange(20,10))
print (maxfromrange(21,3,1))
print (maxfromrange(21,3,1,25))