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Added a test for stimflow basis_subset methods #1079

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Merged
Strilanc merged 2 commits into from
Jun 27, 2026
Merged

Added a test for stimflow basis_subset methods #1079

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879cbba
Added a test for stimflow basis_subset methods
DeDuckProject Jun 27, 2026
b3cab0a
Also added a unit test for flat_logicals
DeDuckProject Jun 27, 2026
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67 changes: 67 additions & 0 deletions glue/stimflow/src/stimflow/_chunk/_stabilizer_code_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -312,3 +312,70 @@ def test_with_remaining_degrees_of_freedom_as_logicals():
),
],
)

def test_basis_subset():
code = stimflow.StabilizerCode(
stabilizers=[
stimflow.Tile(bases="XX", data_qubits=[0, 1]),
stimflow.Tile(bases="ZZ", data_qubits=[2, 3]),
],
logicals=[
(
stimflow.PauliMap.from_xs([0]).with_obs_name("X"),
stimflow.PauliMap.from_zs([1]).with_obs_name("Z"),
),
],
)

x_subset = code.x_basis_subset()
z_subset = code.z_basis_subset()

assert x_subset.stabilizers == stimflow.Patch(
[
stimflow.Tile(bases="XX", data_qubits=[0, 1]),
]
)
assert x_subset.logicals == (
stimflow.PauliMap.from_xs([0]).with_obs_name("X"),
)
assert z_subset.stabilizers == stimflow.Patch(
[
stimflow.Tile(bases="ZZ", data_qubits=[2, 3]),
]
)
assert z_subset.logicals == (
stimflow.PauliMap.from_zs([1]).with_obs_name("Z"),
)

def test_flat_logicals():
code = stimflow.StabilizerCode(
stabilizers=[
stimflow.Tile(bases="XX", data_qubits=[0, 1]),
stimflow.Tile(bases="ZZ", data_qubits=[2, 3]),
],
logicals=[
(
stimflow.PauliMap.from_xs([0, 1]).with_obs_name("LX1"),
stimflow.PauliMap.from_zs([2, 3]).with_obs_name("LZ1"),
),
(
stimflow.PauliMap.from_xs([4, 5]).with_obs_name("LX2"),
stimflow.PauliMap.from_zs([6, 7]).with_obs_name("LZ2"),
),
],
scattered_logicals=[
stimflow.PauliMap.from_xs([2, 3]).with_obs_name("LX3"),
stimflow.PauliMap.from_zs([4, 5]).with_obs_name("LZ3"),
],
)

flat_logicals = code.flat_logicals

assert flat_logicals == (
stimflow.PauliMap.from_xs([0, 1]).with_obs_name("LX1"),
stimflow.PauliMap.from_zs([2, 3]).with_obs_name("LZ1"),
stimflow.PauliMap.from_xs([4, 5]).with_obs_name("LX2"),
stimflow.PauliMap.from_zs([6, 7]).with_obs_name("LZ2"),
stimflow.PauliMap.from_xs([2, 3]).with_obs_name("LX3"),
stimflow.PauliMap.from_zs([4, 5]).with_obs_name("LZ3"),
)
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