def test_parameter_expression(self):
"""Test evaluation with parameter expressions"""
x = sympy.Symbol('x')
y = sympy.Symbol('y')
qr1 = QuantumRegister(1, name='qr1')
qc1 = QuantumCircuit(qr1)
qc1.rx(x, qr1)
qc1.rz(x + y, qr1)
qc1.ry(-x, qr1)
gate = qc1.to_instruction()
self.assertEqual(gate.params, [x, x + y, -x])
circs = []
x_list = numpy.arange(0, 5)
y_list = numpy.arange(10, 51, 10)
for ones, tens in zip(x_list, y_list):
circs.append(qc1.assign_variables({x: ones, y: tens}))
for index, (ones, tens) in enumerate(zip(x_list, y_list)):
self.assertEqual(circs[index].data[0][0].params[0], ones)
self.assertEqual(circs[index].data[1][0].params[0], ones + tens)
self.assertEqual(circs[index].data[2][0].params[0], -ones)
