| """ | |
| Tests for dashboard_core.system_limits.max_safe_dense_qubits -- the real, | |
| per-machine RAM-aware qubit cap the Composer's UI uses instead of a fixed | |
| number (dense_evolution.chunk.SafeMemoryGuard + get_dynamic_chunk under | |
| the hood, both real psutil-backed). | |
| """ | |
| from dashboard_core.system_limits import max_safe_dense_qubits | |
| def test_returns_real_structure_with_sane_values(): | |
| limits = max_safe_dense_qubits() | |
| assert set(limits.keys()) == {"total_mb", "available_mb", "threshold_pct", "max_qubits_dense"} | |
| assert limits["total_mb"] > 0 | |
| assert 0 < limits["available_mb"] <= limits["total_mb"] | |
| assert 0 < limits["threshold_pct"] < 1 | |
| # get_dynamic_chunk's own documented clamp (dashboard_core/system_limits.py). | |
| assert 16 <= limits["max_qubits_dense"] <= 27 | |
| def test_max_qubits_is_an_int(): | |
| limits = max_safe_dense_qubits() | |
| assert isinstance(limits["max_qubits_dense"], int) | |
| def test_repeated_calls_are_consistent_within_a_tight_window(): | |
| # Real system RAM can shift between calls, but not enough to move the | |
| # qubit cap on two back-to-back calls in a test process. | |
| a = max_safe_dense_qubits() | |
| b = max_safe_dense_qubits() | |
| assert a["max_qubits_dense"] == b["max_qubits_dense"] | |