def test_set_precision(backend, precision):
original_precision = backends.get_precision()
backends.set_precision(precision)
if precision == "single":
expected_dtype = K.backend.complex64
else:
expected_dtype = K.backend.complex128
assert backends.get_precision() == precision
assert K.dtypes('DTYPECPX') == expected_dtype
# Test that circuits use proper precision
circuit = models.Circuit(2)
circuit.add([gates.H(0), gates.H(1)])
final_state = circuit()
assert final_state.dtype == expected_dtype
backends.set_precision(original_precision)
def test_set_precision_errors():
original_precision = backends.get_precision()
gate = gates.H(0)
with pytest.warns(RuntimeWarning):
backends.set_precision("single")
with pytest.raises(ValueError):
backends.set_precision("test")
backends.set_precision(original_precision)
def test_set_precision_errors(backend, caplog):
original_precision = backends.get_precision()
gate = gates.H(0)
backends.set_precision("single")
assert "WARNING" in caplog.text
with pytest.raises(ValueError):
backends.set_precision("test")
backends.set_precision(original_precision)
def test_set_precision_matrices(backend, precision):
import numpy as np
from qibo import matrices
original_precision = backends.get_precision()
backends.set_precision(precision)
if precision == "single":
assert matrices.dtype == "complex64"
assert matrices.H.dtype == np.complex64
assert K.matrices.dtype == "complex64"
assert K.matrices.X.dtype == K.backend.complex64
else:
assert matrices.dtype == "complex128"
assert matrices.H.dtype == np.complex128
assert K.matrices.dtype == "complex128"
assert K.matrices.X.dtype == K.backend.complex128
backends.set_precision(original_precision)