def test_bang_for_buck(self):
item = Item(weight1=10, value=2)
backpack = Backpack()
backpack.add_item(item)
constraint = FastMaxItemValue(lambda x: x.weight1, 50, "Test Rule")
results = constraint.test(backpack)
expect(results.bang_for_buck) == 10
def test_fit_multiple(self):
item = Item(weight1=10)
backpack = Backpack()
backpack.add_item(item)
constraint = FastMaxItemValue(lambda x: x.weight1, 50, "Test Rule")
results = constraint.test(backpack)
expect(results.fit_multiple) == 5
def test_fails(self):
item = Item(weight1=25.1)
max_value_results = MaxValueResult(
True, {item: {
'pass': True,
'total': 25.1
}}, "Test Rule")
results = AllTestResults()
results.update_constraint(max_value_results)
backpack = Backpack(test_results=results)
backpack.add_item(item)
constraint = FastMaxItemValue(lambda x: x.weight1, 50, "Test Rule")
new_max_value_results = constraint.test(backpack)
expect(new_max_value_results.passes) == False
def test_passes(self):
backpack = Backpack()
backpack.add_item(Item(weight1=10))
constraint = FastMaxItemValue(lambda x: x.weight1, 10, "Test Rule")
results = constraint.test(backpack)
expect(results.passes) == True