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#!/usr/bin/env python
import unittest
import random
import time
from argaze import GazeFeatures
from argaze.GazeAnalysis import DispersionBasedGazeMovementIdentifier
import numpy
def build_gaze_fixation(size: int, center: tuple, dispersion: float, start_time: float, min_time: float, max_time: float):
""" Generate N TimeStampedGazePsoitions dispersed around a center point for testing purpose.
Timestamps are current time after random sleep (second).
GazePositions are random values.
"""
ts_gaze_positions = GazeFeatures.TimeStampedGazePositions()
for i in range(0, size):
# Edit gaze position
random_x = center[0] + dispersion * (random.random() - 0.5)
random_y = center[1] + dispersion * (random.random() - 0.5)
random_gaze_position = GazeFeatures.GazePosition((random_x, random_y))
# Store gaze position
ts = time.time() - start_time
ts_gaze_positions[ts] = random_gaze_position
#print(ts, random_x, random_y)
# Sleep a random time
sleep_time = random.random() * (max_time - min_time) + min_time
time.sleep(sleep_time)
return ts_gaze_positions
class TestDispersionBasedGazeMovementIdentifierClass(unittest.TestCase):
"""Test DispersionBasedGazeMovementIdentifier class."""
def test_fixation_identification(self):
"""Test DispersionBasedGazeMovementIdentifier fixation identification."""
size = 10
center = (0, 0)
dispersion = 10
start_time = time.time()
min_time = 0.01
max_time = 0.1
ts_gaze_positions = build_gaze_fixation(size, center, dispersion, start_time, min_time, max_time)
gaze_movement_identifier = DispersionBasedGazeMovementIdentifier.GazeMovementIdentifier(dispersion_threshold=dispersion, duration_threshold=min_time*2)
ts_fixations, ts_saccades, ts_status = gaze_movement_identifier.identify(ts_gaze_positions)
# Check result size
self.assertEqual(len(ts_fixations), 1)
self.assertEqual(len(ts_saccades), 0)
self.assertEqual(len(ts_status), size)
# Check fixation
ts, fixation = ts_fixations.pop_first()
self.assertEqual(len(fixation.positions.keys()), size)
self.assertLessEqual(fixation.dispersion, dispersion)
self.assertGreaterEqual(fixation.duration, size * min_time)
self.assertLessEqual(fixation.duration, size * max_time)
def test_fixation_and_saccade_identification(self):
"""Test DispersionBasedGazeMovementIdentifier fixation and saccade identification."""
size = 10
center_A = (0, 0)
center_B = (50, 50)
dispersion = 10
start_time = time.time()
min_time = 0.01
max_time = 0.1
ts_gaze_positions_A = build_gaze_fixation(size, center_A, dispersion, start_time, min_time, max_time)
ts_gaze_positions_B = build_gaze_fixation(size, center_B, dispersion, start_time, min_time, max_time)
ts_gaze_positions = ts_gaze_positions_A.append(ts_gaze_positions_B)
gaze_movement_identifier = DispersionBasedGazeMovementIdentifier.GazeMovementIdentifier(dispersion_threshold=dispersion, duration_threshold=min_time*2)
ts_fixations, ts_saccades, ts_status = gaze_movement_identifier.identify(ts_gaze_positions)
# Check result size
self.assertEqual(len(ts_fixations), 2)
self.assertEqual(len(ts_saccades), 1)
self.assertEqual(len(ts_status), size*2)
# Check first fixation
ts, fixation = ts_fixations.pop_first()
self.assertEqual(len(fixation.positions.keys()), size)
self.assertLessEqual(fixation.dispersion, dispersion)
self.assertGreaterEqual(fixation.duration, size * min_time)
self.assertLessEqual(fixation.duration, size * max_time)
# Check first saccade
ts, saccade = ts_saccades.pop_first()
self.assertEqual(len(saccade.positions.keys()), 2)
self.assertGreaterEqual(saccade.duration, min_time)
self.assertLessEqual(saccade.duration, max_time)
# Check second fixation
ts, fixation = ts_fixations.pop_first()
self.assertEqual(len(fixation.positions.keys()), size)
self.assertLessEqual(fixation.dispersion, dispersion)
self.assertGreaterEqual(fixation.duration, size * min_time)
self.assertLessEqual(fixation.duration, size * max_time)
if __name__ == '__main__':
unittest.main()
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