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# test micropython.schedule() function

import micropython

try:

micropython.schedule

except AttributeError:

print("SKIP")

raise SystemExit

# Basic test of scheduling a function.

def callback(arg):

global done

print(arg)

done = True

done = False

micropython.schedule(callback, 1)

while not done:

pass

# Test that callbacks can be scheduled from within a callback, but

# that they don't execute until the outer callback is finished.

def callback_inner(arg):

global done

print("inner")

done += 1

def callback_outer(arg):

global done

micropython.schedule(callback_inner, 0)

# need a loop so that the VM can check for pending events

for i in range(2):

pass

print("outer")

done += 1

done = 0

micropython.schedule(callback_outer, 0)

while done != 2:

pass

# Test that scheduling too many callbacks leads to an exception. To do this we

# must schedule from within a callback to guarantee that the scheduler is locked.

def callback(arg):

global done

try:

for i in range(100):

micropython.schedule(lambda x: x, None)

except RuntimeError:

print("RuntimeError")

done = True

done = False

micropython.schedule(callback, None)

while not done:

pass