def test_placed_by(self):
A = SearchNode('A')
B = SearchNode('B')
stack = SearchStack()
stack.push(A)
stack.push(B, A)
node = stack.pop()
self.assertEquals(stack.placed_by(node.name).name, 'A')
node = stack.pop()
self.assertIsNone(stack.placed_by(node.name))
def test_advanced_pushpop(self):
A = SearchNode('A')
stack = SearchStack()
result = stack.push(A)
self.assertTrue(result)
self.assertEquals(len(stack), 1)
stack.push(A)
self.assertEquals(len(stack), 1)
stack.pop()
stack.push(A)
self.assertEquals(len(stack), 0)
def test_placed_by(self):
A = SearchNode('A')
B = SearchNode('B')
stack = SearchStack()
stack.push(A)
stack.push(B, A)
node = stack.pop()
self.assertEquals(stack.placed_by(node.name).name, 'A')
node = stack.pop()
self.assertIsNone(stack.placed_by(node.name))
def test_advanced_pushpop(self):
A = SearchNode('A')
stack = SearchStack()
result = stack.push(A)
self.assertTrue(result)
self.assertEquals(len(stack), 1)
stack.push(A)
self.assertEquals(len(stack), 1)
stack.pop()
stack.push(A)
self.assertEquals(len(stack), 0)
def test_stack_pop(self):
A = SearchNode('A')
B = SearchNode('B')
stack = SearchStack()
stack.push(A)
stack.push(B)
self.assertEquals(len(stack), 2)
node = stack.pop()
self.assertEquals(len(stack), 1)
self.assertIsInstance(node, SearchNode)
self.assertEquals(node.name, 'B')
def test_stack_pop(self):
A = SearchNode('A')
B = SearchNode('B')
stack = SearchStack()
stack.push(A)
stack.push(B)
self.assertEquals(len(stack), 2)
node = stack.pop()
self.assertEquals(len(stack), 1)
self.assertIsInstance(node, SearchNode)
self.assertEquals(node.name, 'B')