python

python/simple-integration-tests/eiger/test_time.py

@@ -0,0 +1,136 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Tests regarding exposure time and period of the detector
+Set and get test as well as test for duration and on detector 
+measurement of the time.
+"""
+import pytest
+import config_test
+from fixtures import detector, eiger, jungfrau, eigertest, jungfrautest
+from sls_detector.errors import DetectorValueError, DetectorError
+import time
+
+
+testdata_times = [1e-8, 0.001, 0.5, 3.125, 5.0, 600, 784]
+@pytest.mark.parametrize("t", testdata_times)
+def test_set_and_get_exposure_time(eiger, t):
+    """
+    Test that the exposure time we set in the detector
+    is the same as the one read back
+    """
+    eiger.exposure_time = t
+    assert eiger.exposure_time == t
+
+
+def test_negative_exposure_time_raises_error(eiger):
+    with pytest.raises(DetectorValueError):
+        eiger.exposure_time = -15
+
+
+testdata_times = [0.001, 0.0025, 0.005, 5]
+@pytest.mark.parametrize("t", testdata_times)
+def test_set_subexptime(eiger, t):
+    eiger.sub_exposure_time = t
+    assert eiger.sub_exposure_time == t
+
+
+testdata_times = [-5,6,7,50]
+@pytest.mark.parametrize("t", testdata_times)
+def test_set_subextime_too_large_or_neg(eiger, t):
+    with pytest.raises((DetectorError, DetectorValueError)):
+        eiger.sub_exposure_time = t
+
+
+
+testdata_times = [0.2, 0.5, 1, 2, 5, 7]
+@pytest.mark.slow
+@pytest.mark.parametrize("t", testdata_times)
+def test_measure_exposure_time_from_python(eiger, t):
+    """ 
+    The main idea with this test is to make sure the overhead of a
+    single acq is less than tol[s]. This test also catches stupid bugs
+    that would for example not change the exposure time or make acquire 
+    not blocking. 
+    """
+    tol = 0.5
+    eiger.dynamic_range = 16
+    eiger.file_write = False
+    eiger.n_frames = 1
+    eiger.exposure_time = t
+    assert eiger.exposure_time == t
+    t0 = time.time()
+    eiger.acq()
+    duration = time.time()-t0
+    assert duration < (t+tol)
+
+
+testdata_times = [0.5, 1, 3, 5]
+
+
+@pytest.mark.slow
+@pytest.mark.parametrize("t", testdata_times)
+def test_measure_period_from_python_and_detector(eiger, t):
+    tol = 0.5
+    nframes = 5
+    eiger.dynamic_range = 16
+    eiger.file_write = False
+    eiger.n_frames = nframes
+    eiger.exposure_time = 0.001
+    eiger.period = t
+    t0 = time.time()
+    eiger.acq()
+    duration = time.time()-t0
+    assert duration < t*(nframes-1)+tol
+    for mp in eiger.measured_period:
+        assert pytest.approx(mp, 1e-5) == t
+
+
+testdata_times = [0.001, 0.002, 0.003, 0.005, 0.01]
+@pytest.mark.parametrize("t", testdata_times)
+def test_measure_subperiod_nonparallel(eiger, t):
+    readout_time = 500e-6
+    eiger.dynamic_range = 32
+    eiger.file_write = False
+    eiger.flags = 'nonparallel'
+    eiger.n_frames = 1
+    eiger.period = 0
+    eiger.exposure_time = 0.5
+    eiger.sub_exposure_time = t
+    eiger.sub_deadtime = 0
+    eiger.acq()
+    for mp in eiger.measured_subperiod:
+        assert pytest.approx(mp, abs=1e-5) == t+readout_time
+
+
+@pytest.mark.parametrize("t", testdata_times)
+def test_measure_subperiod_parallel(eiger, t):
+    readout_time = 12e-6
+    eiger.dynamic_range = 32
+    eiger.file_write = False
+    eiger.flags = 'parallel'
+    eiger.n_frames = 1
+    eiger.period = 0
+    eiger.exposure_time = 0.5
+    eiger.sub_exposure_time = t
+    eiger.sub_deadtime = 0
+    eiger.acq()
+    for mp in eiger.measured_subperiod:
+        assert pytest.approx(mp, abs=1e-5) == t+readout_time
+
+
+@pytest.mark.parametrize("t", testdata_times)
+def test_measure_subperiod_parallel_when_changing_deadtime(eiger, t):
+    readout_time = 12e-6
+    exposure_time = 0.001
+    eiger.dynamic_range = 32
+    eiger.file_write = False
+    eiger.flags = 'parallel'
+    eiger.n_frames = 1
+    eiger.period = 0
+    eiger.exposure_time = 0.5
+    eiger.sub_exposure_time = exposure_time
+    eiger.sub_deadtime = t
+    eiger.acq()
+    for mp in eiger.measured_subperiod:
+        assert pytest.approx(mp, abs=1e-5) == t+exposure_time