def METHOD_NAME(self):
    """
    Test that `xx_circuit_step` correctly generates prefix/affix circuits relating source
    canonical coordinates to target canonical coordinates along prescribed interactions, all
    randomly selected.
    """
    for _ in range(100):
        source_coordinate, interaction, target_coordinate = self._generate_xxyy_test_case()
        source_embodiment = qiskit.QuantumCircuit(2)
        source_embodiment.append(
            qiskit.extensions.UnitaryGate(canonical_matrix(*source_coordinate)), [0, 1]
        )
        interaction_embodiment = qiskit.QuantumCircuit(2)
        interaction_embodiment.append(
            qiskit.extensions.UnitaryGate(canonical_matrix(*interaction)), [0, 1]
        )
        prefix_circuit, affix_circuit = itemgetter("prefix_circuit", "affix_circuit")(
            xx_circuit_step(
                source_coordinate, interaction[0], target_coordinate, interaction_embodiment
            )
        )
        target_embodiment = QuantumCircuit(2)
        target_embodiment.compose(prefix_circuit, inplace=True)
        target_embodiment.compose(source_embodiment, inplace=True)
        target_embodiment.compose(affix_circuit, inplace=True)
        self.assertTrue(
            np.all(
                np.abs(
                    qiskit.quantum_info.operators.Operator(target_embodiment).data
                    - canonical_matrix(*target_coordinate)
                )
                < EPSILON
            )
        )