[Bug]: Some tests are broken if seed is changed

[thierry-martinez]

Bug description The following tests are broken when tested with a different seed:

• test_pattern.py::test_pauli_measurment_opt_gate
• test_pattern.py::test_pauli_measurment_opt_gate_transpiler
• test_pattern.py::test_pauli_measurment_opt_gate_transpiler_without_signalshift
• test_gflow.py::test_rand_circ_gflow

To Reproduce The failures in test_pattern.py can be observed by adding

+        rc.set_seed(25)

in the beginning of the method test_pauli_measurment_opt_gate (changing the SEED value in the beginning of the file will not change the behavior, since the seed value is overridden by other tests).

The failure in test_gflow.py can be observed by changing the value of seed in the beginning of the file.

-seed = 30
+seed = 25

Expected behavior Changing the seed should not break the tests.

Environment (please complete the following information):

• OS: macOS 14.4.1 (23E224)
• Python version: 3.11.8
• Related module versions if applicable: numpy=1.25.2

Additional context I noticed these failures in an effort to address https://github.com/TeamGraphix/graphix/issues/65

[EarlMilktea]

I also encountered it.

[masa10-f]

@shinich1 Have you checked the test_gflow.py::test_rand_circ_gflow ?

[shinich1]

@shinich1 Have you checked the test_gflow.py::test_rand_circ_gflow ?

Actually, test passed without any fix on my side (I removed the skip command and changed the seed when trying). Somehow I haven't pushed it but we need to remove this line. https://github.com/TeamGraphix/graphix/blob/19eb94cabccf0ca9f9ad2b765a2f2bfbf65bba93/tests/test_gflow.py#L510