def test_node_exists_nonexistant(self):
"""
A node knows whether it exists or not.
"""
node = ZNode("/zoo/rabbit", self.client)
exists = yield node.exists()
self.assertFalse(exists)
def test_node_set_data_update_with_cached_exists(self):
"""
Data can be set on an existing node, updating it
in place.
"""
node = ZNode("/zoo/monkey", self.client)
yield self.client.create("/zoo/monkey", "stripes")
exists = yield node.exists()
self.assertTrue(exists)
yield node.set_data("banana")
data, stat = yield self.client.get("/zoo/monkey")
self.assertEqual(data, "banana")
def test_node_set_data_update_with_invalid_cached_exists(self):
"""
If a node is deleted, attempting to set data on it
raises a no node exception.
"""
node = ZNode("/zoo/monkey", self.client)
yield self.client.create("/zoo/monkey", "stripes")
exists = yield node.exists()
self.assertTrue(exists)
yield self.client.delete("/zoo/monkey")
d = node.set_data("banana")
self.failUnlessFailure(d, zookeeper.NoNodeException)
yield d
