def testDerive(self):
e1 = Env()
e2 = e1.derive()
e1.get('bar')
e2.get('foo')
self.assertEqual(e1.touchedKeys(), set(['foo', 'bar']))
self.assertEqual(e2.touchedKeys(), set(['foo', 'bar']))
def testDeriveResetSplit(self):
e1 = Env()
e2 = e1.derive()
e2.touchReset()
e3 = e1.derive()
e3.touchReset()
e1.get('bar')
e2.get('foo')
e3.get('baz')
self.assertEqual(e1.touchedKeys(), set(['foo', 'bar', 'baz']))
self.assertEqual(e2.touchedKeys(), set(['foo']))
self.assertEqual(e3.touchedKeys(), set(['baz']))