from iodev import *
print "testing generic IODevice"
def testseek(typ,pos):
  typename=typ.str
  val=typ.seek(pos)
  if val!=None:
    print "  %s seek(%8d)=%10.6f" % (typename,pos,val)
  else:
    print "  Bad seek"

g = IODevice(1000000)
testseek(g, 0)       # should be fast
testseek(g, 1000)    # should also be fast
testseek(g, 1001)    # should also be fast
testseek(g, 1000)    # should also be fast
testseek(g, 999999)  # should be fast
testseek(g, 1000000) # should fail

print "testing Tape device"
t = Tape() # use default size
testseek(t, 0)    # should be fast
testseek(t, 100)  # perhaps not quite as fast
testseek(t, 1000) # slower still
testseek(t, 1001) # fast!
testseek(t, 1000) # fast or slow?
# dare you try testseek(t, 10000) ?

print "testing Disk device"
d = Disk()
testseek(d, 0)
testseek(d, 100)
testseek(d, 1000)
testseek(d, 1001)
testseek(d, 1000)