def test_Equality(reset_NodeDict):
x = Var('x')
y = Var('y')
fx = VSF('f', x)
#Each expressions are reused if cached.
assert (x is not Var('x'))
x.cache()
assert (x is Var('x'))
fx.cache()
assert (fx is VSF('f', x))
assert (Var('x') == x)
assert (Val(1) == Val(1))
#Values are simplified to scalar when possible:
assert (Val(1) == Val(np.array([1])))
assert (Val(1) == Val(np.array([[1]])))
def declareAndCache(name, val=None):
var = Var(name, val)
var.cache()
return var