def test_project_scale_reversed():
scaled = project_scale(0.3, 0.1, 0.9, 20, 10)
assert scaled == 17.5
def test_project_scale_zero_cross_reversed():
scaled = project_scale(-0.1, 0.1, -0.4, 10, 70)
assert scaled == 34
def test_project_scale_basic():
scaled = project_scale(0.3, 0.1, 0.9, 10, 20)
assert scaled == 12.5
def test_project_scale_zero_cross():
scaled = project_scale(-0.1, 0.1, -0.4, 70, 10)
assert scaled == 46
