def test_str_works(self):
canada = core.Country('Canada', 34482779, 9984670)
mexico = core.Country('Mexico', 112336538, 1943950)
usa = core.Country('United States of America', 313914040, 9826675)
na = core.Continent("North America", [canada, mexico, usa])
assert str(na) == '''North America
def test_Country_init_works(self):
c = core.Country('a', 1, 2)
assert c.name == 'a'
assert c.population == 1
assert c.area == 2
def test_total_population_works(self):
canada = core.Country('Canada', 34482779, 9984670)
mexico = core.Country('Mexico', 112336538, 1943950)
usa = core.Country('United States of America', 313914040, 9826675)
na = core.Continent("North America", [canada, mexico, usa])
assert na.total_population() == 460733357
def test_repr_works(self):
a = core.Country('a', 45, 20)
assert repr([a]) == "[Country('a', 45, 20)]"
def test_str_works(self):
a = core.Country('a', 4, 21)
assert str(a) == 'a has a population of 4 and is 21 square km.'
def test_population_density_works(self):
a = core.Country('wow', 100, 200)
assert a.population_density() == 0.5
def test_is_larger_works(self):
a = core.Country('a', 3, 2)
b = core.Country('b', 1, 3)
assert a.is_larger(b) == True
