def test_identical_inv_scalar():
x = -10
rf = functions.Identical()
assert rf.inv(x) == x
def test_identical_inv_scalar():
x = -10
rf = functions.Identical()
assert rf.physical_to_int(x) == x
def test_identical_inv():
xs = np.arange(-10, 11)
rf = functions.Identical()
assert np.array_equal(rf.inv(xs), xs)
def test_identical():
xs = np.arange(-10, 11)
rf = functions.Identical()
assert np.array_equal(rf.int_to_physical(xs), xs)
assert np.array_equal(rf.physical_to_int(xs), xs)