def test_subscr(self):
cb = CB()
watch.config(callback=cb)
a = [1, 2, 3]
watch(a[1])
a[0] = 2
a[1] = 3
self.assertEqual(cb.counter, 1)
with self.assertRaises(ValueError):
watch(a[0:2])
def val(arg):
return 1
a[val(3)] = 4
self.assertEqual(cb.counter, 2)
unwatch()
a = {"a": 1}
watch(a["a"])
a["a"] = 2
a["b"] = 3
self.assertEqual(cb.counter, 3)
unwatch()
def test_long(self):
cb = CB()
watch.config(callback=cb)
a = [1, 2, 3]
watch(a)
a[1] = 0
self.assertEqual(cb.counter, 1)
unwatch(a)
a[1] = 1
self.assertEqual(cb.counter, 1)
watch(a)
a[1] = 0
self.assertEqual(cb.counter, 2)
unwatch()
a[1] = 2
self.assertEqual(cb.counter, 2)
watch(a)
a[1] = 0
self.assertEqual(cb.counter, 3)
unwatch()
a[1] = 2
self.assertEqual(cb.counter, 3)
watch(a, alias="a")
a[1] = 4
self.assertEqual(cb.counter, 4)
unwatch("a")
a[1] = 5
self.assertEqual(cb.counter, 4)
def test_printer(self):
s = io.StringIO()
with redirect_stdout(s):
watch.config(file=sys.stdout)
a = [1, 2, 3]
watch(a)
a[0] = 2
unwatch()
self.assertNotEqual(s.getvalue(), "")
def test_stack_limit_global(self):
watch.config(stack_limit=1)
s = io.StringIO()
with redirect_stdout(s):
watch.config(file=sys.stdout)
a = [1, 2, 3]
watch(a)
a[0] = 2
unwatch()
self.assertEqual(s.getvalue().count("> "), 1)
def test_alias(self):
cb = CB()
watch.config(callback=cb)
a = [1, 2, 3]
watch(a, alias="a")
a[1] = 4
self.assertEqual(cb.counter, 1)
unwatch("a")
a[1] = 5
self.assertEqual(cb.counter, 1)
def test_noargs(self):
cb = CB()
watch.config(callback=cb)
a = [1, 2, 3]
watch(a)
a[1] = 0
self.assertEqual(cb.counter, 1)
unwatch()
a[1] = 2
self.assertEqual(cb.counter, 1)
def test_custom_printer(self):
s = io.StringIO()
with redirect_stdout(s):
watch.config(file=sys.stdout)
a = [i for i in range(100)]
watch(a, custom_printer=print)
a = [i + 1 for i in range(100)]
unwatch()
self.assertLess(s.getvalue().count("\n"), 100)
with redirect_stdout(s):
watch.config(file=sys.stdout, custom_printer=print)
a = [i for i in range(100)]
watch(a)
a = [i + 1 for i in range(100)]
unwatch()
self.assertLess(s.getvalue().count("\n"), 100)
def test_attr(self):
class MyObj:
def __init__(self):
self.a = 0
cb = CB()
watch.config(callback=cb)
obj = MyObj()
watch(obj.a)
obj.a = 1
self.assertEqual(cb.counter, 1)
unwatch(obj.a)
obj.a = 2
self.assertEqual(cb.counter, 1)
watch(obj)
obj.a = 3
self.assertEqual(cb.counter, 2)
obj.a = 3
self.assertEqual(cb.counter, 2)
def test_basic(self):
cb = CB()
watch.config(callback=cb)
a = [1, 2, 3]
watch(a)
a[0] = 2
a.append(4)
b = a
b.append(5)
a = {"a": 1}
a["b"] = 2
def change(d):
d["c"] = 3
change(a)
self.assertEqual(cb.counter, 6)
unwatch()
