def test_string(self):
assert "?" in display_score("")
def test_none(self):
assert "?" in display_score(None)
def test_success(self):
assert "success" in display_score("81")
def test_info(self):
assert "info" in display_score("79")
def test_primary(self):
assert "primary" in display_score("65")
def test_warning(self):
assert "warning" in display_score("50")
def test_danger(self):
assert "danger" in display_score("30")
