def test_vector_constant_addition():
a = ad.Constant(2.0 * np.ones(10))
b = ad.Constant(3.0 * np.ones(10))
a.eval({}) == 2.0 * np.ones(10)
b.eval({}) == 3.0 * np.ones(10)
c = a + b
assert equals(c.eval({}), 5.0 * np.ones(10))
def test_constant_division():
a = ad.Constant(5)
a2 = ad.Constant(-5)
b = ad.Variable('b')
c = a / b
d = b / a2
assert c.eval({b: 5}) == 1
assert d.eval({b: 5}) == -1
def test_constant_multiplication():
a = ad.Constant(5)
a2 = ad.Constant(-5)
b = ad.Variable('b')
c = a * b
d = b * a2
assert c.eval({b: 5}) == 25
assert d.eval({b: 5}) == -25
def test_constant_subtraction():
a = ad.Constant(5)
a2 = ad.Constant(-5)
b = ad.Variable('b')
c = a - b
d = b - a2
assert c.eval({b: 5}) == 0
assert d.eval({b: 5}) == 10
def test_constant_addition():
a = ad.Constant(5)
b = ad.Variable('b')
c = a + b
assert c.eval({b: 5}) == 10
def test_vector_constant_subtraction():
a = ad.Constant(2.0 * np.ones(10))
b = ad.Constant(3.0 * np.ones(10))
c = a - b
assert equals(c.eval({}), -np.ones(10))
def test_constant_hessian():
"""Checks the trivial case"""
constant_5 = ad.Constant(5.1231)
assert (constant_5.hessian({}) == 0)
def test_constant_simple_op_hessian():
c1 = ad.Constant(50)
c2 = ad.Constant(123)
c3 = ad.Constant(500)
f = c1 * c2 + c1 / c3 + (1 - c2) * (-c3)
assert (f.hessian({}) == 0)
def test_constant_exceptions():
x = ad.Constant('x')
y = ad.Variable()
assert x._d_expr(y).eval({}) == 0
def test_casted_constants_right(self):
c1 = ad.Constant(1.0)
self.assertEqual((5 - c1).eval({}), 4.0)
self.assertEqual((1 - c1).eval({}), 0)
self.assertEqual(((-5) - c1).eval({}), -6.0)
def test_casted_constants_left(self):
c1 = ad.Constant(1.0)
self.assertEqual((c1 - 5).eval({}), -4.0)
self.assertEqual((c1 - 1).eval({}), 0)
self.assertEqual((c1 - (-5)).eval({}), 6.0)
def test_constants(self):
c1 = ad.Constant(1.0)
c2 = ad.Constant(5.0)
y = c1 - c2
self.assertEqual(-4.0, y.eval({}))
def test_constant_eval():
c = ad.Constant(5)
assert c.eval({}) == 5
assert c.d({}) == 0