def test_constant():
data = [1, 1, 1, 1, 1]
is_bad = _is_bad_data(data, 100)
assert is_bad
def test_valid():
data = [1, 0, 0, 2, 1]
is_bad = _is_bad_data(data, 100)
assert not is_bad
def test_sudden_jump():
data = [0, 0, 0, 1000, 0]
is_bad = _is_bad_data(data, 100)
assert is_bad
def test_nan():
data = [np.nan, 0, 0, 2, np.nan]
is_bad = _is_bad_data(data, 100)
assert is_bad