from unittest.case import TestCase
from tudelft.utilities.tools.atomic import AtomicBoolean

class atomicTest(TestCase):
    def testSimple(self):
        a=AtomicBoolean(True)
        self.assertEqual(True,a.get())
        self.assertEqual(False,a.compareAndSet(False,False))
        self.assertEqual(False,a.compareAndSet(False,True))
        self.assertEqual(True,a.get())
        self.assertEqual(True,a.compareAndSet(True,True))
        self.assertEqual(True,a.get())
        self.assertEqual(True,a.compareAndSet(True,False))
        self.assertEqual(False,a.get())
        self.assertEqual(True,a.compareAndSet(False,False))
        self.assertEqual(False,a.get())
        self.assertEqual(True,a.compareAndSet(False,True))
        self.assertEqual(True,a.get())
        
    # FIXME it would be nice to stress test the AtomicBoolnan for thread safety.
    # I think we need to slow down AtomicBoolean processing for that, 
    # and tthat would pollute the AtomicBoolean code...