blissoda.demo.tests.itest_stop_scan_xrpd_id31.test_attenuation_increase

blissoda.demo.tests.itest_stop_scan_xrpd_id31.test_attenuation_increase()

Verify that the preset increases attenuation when frames are saturating.

Strategy: set detector_saturation below the measured baseline intensity so every frame appears saturating to the preset. The workflow threshold is set astronomically high so the Ewoks workflow never fires a stop event and the scan runs to normal completion. After npoints frames the preset must have moved atten.bits above 0.