def setUp(self):
self.dev = Cobra()
class TestCobra(unittest.TestCase):
def setUp(self):
self.dev = Cobra()
def test_pipe_cycle(self):
self.assertTrue(self.dev.setup_pipe())
result, data = self.dev.grab_pipe()
self.assertTrue(result)
self.assertEqual(len(data), 2048)
self.assertTrue(self.dev.close_pipe())
def test_speed(self):
self.assertTrue(self.dev.setup_pipe())
result, data = self.dev.grab_pipe()
forc_res = self.dev.open_port()
forc_res = self.dev.start_scan()
avg_default = numpy.average(data)
time_start = time.time()
for i in range(255):
result = self.dev.set_gain(100)
result, data = self.dev.grab_pipe()
time_stop = time.time()
time_diff = time_stop - time_start
log.info("time diff: %s" % time_diff)
self.assertTrue(self.dev.close_pipe())
def test_gain(self):
# Make sure no light is reaching the detector when running this test
# Yes, this is the correct order - see the barbecue application for
# details. An alternative if speed is not required is the open write
# close pattern in the test below
self.assertTrue(self.dev.setup_pipe())
result, data = self.dev.grab_pipe()
forc_res = self.dev.open_port()
forc_res = self.dev.start_scan()
# Set to default gain
result = self.dev.set_gain(187)
result, data = self.dev.grab_pipe()
avg_default = numpy.average(data)
time.sleep(0.5)
result = self.dev.set_gain(100)
result, data = self.dev.grab_pipe()
avg_low_gain = numpy.average(data)
gain_diff_threshold = 1000
gain_diff = abs(avg_low_gain - avg_default)
self.assertGreater(gain_diff, gain_diff_threshold)
# Now set it back to default 187, and make sure the difference
# is minimal
result = self.dev.set_gain(187)
result, data = self.dev.grab_pipe()
new_default = numpy.average(data)
new_diff = abs(new_default - avg_default)
self.assertLess(new_diff, 10)
forc_res = self.dev.close_port()
self.assertTrue(self.dev.close_pipe())
def test_openwriteclose_gain(self):
self.assertTrue(self.dev.setup_pipe())
result, data = self.dev.grab_pipe()
self.assertTrue(result)
self.assertEqual(len(data), 2048)
self.assertTrue(self.dev.open_write_close("gain 187"))
result, data = self.dev.grab_pipe()
avg_default = numpy.average(data)
self.assertTrue(self.dev.open_write_close("gain 100"))
result, data = self.dev.grab_pipe()
avg_low_gain = numpy.average(data)
gain_diff_threshold = 1000
gain_diff = abs(avg_low_gain - avg_default)
self.assertGreater(gain_diff, gain_diff_threshold)
self.assertTrue(self.dev.close_pipe())
def test_offset(self):
self.assertTrue(self.dev.setup_pipe())
result, data = self.dev.grab_pipe()
self.assertTrue(result)
self.assertEqual(len(data), 2048)
self.assertTrue(self.dev.open_write_close("offset 0"))
result, data = self.dev.grab_pipe()
avg_default = numpy.average(data)
self.assertTrue(self.dev.open_write_close("offset 255"))
result, data = self.dev.grab_pipe()
avg_high_offset = numpy.average(data)
self.assertGreater(avg_default, avg_high_offset)
self.assertTrue(self.dev.close_pipe())