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#!/usr/bin/env python
""" """
__author__ = "Théo de la Hogue"
__credits__ = []
__copyright__ = "Copyright 2023, Ecole Nationale de l'Aviation Civile (ENAC)"
__license__ = "BSD"
import unittest
import random
import time
import math
from argaze import GazeFeatures
from argaze.GazeAnalysis import VelocityThresholdIdentification
import numpy
def build_gaze_fixation(size: int, center: tuple, deviation_max: float, min_time: float, max_time: float, start_ts: float = 0., validity: list = []):
""" 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()
start_time = time.time()
for i in range(0, size):
# Sleep a random time
sleep_time = random.random() * (max_time - min_time) + min_time
time.sleep(sleep_time)
# Check position validity
valid = True
if len(validity) > i:
valid = validity[i]
if valid:
# Edit gaze position
random_x = center[0] + deviation_max * (random.random() - 0.5) / math.sqrt(2)
random_y = center[1] + deviation_max * (random.random() - 0.5) / math.sqrt(2)
gaze_position = GazeFeatures.GazePosition((random_x, random_y))
else:
gaze_position = GazeFeatures.GazePosition()
# Timestamp gaze position
gaze_position.timestamp = time.time() - start_time + start_ts
# Store gaze position
ts_gaze_positions.append(gaze_position)
return ts_gaze_positions
def build_gaze_saccade(size: int, center_A: tuple, center_B: tuple, min_time: float, max_time: float, start_ts: float = 0., validity: list = []):
""" Generate N TimeStampedGazePsoitions between 2 center points for testing purpose.
Timestamps are current time after random sleep (second).
GazePositions are random values.
"""
ts_gaze_positions = GazeFeatures.TimeStampedGazePositions()
start_time = time.time()
for i in range(0, size):
# Sleep a random time
sleep_time = random.random() * (max_time - min_time) + min_time
time.sleep(sleep_time)
# Check position validity
valid = True
if len(validity) > i:
valid = validity[i]
if valid:
# Edit gaze position
move_x = center_A[0] + (center_B[0] - center_A[0]) * (i / size)
move_y = center_A[1] + (center_B[1] - center_A[1]) * (i / size)
gaze_position = GazeFeatures.GazePosition((move_x, move_y))
else:
gaze_position = GazeFeatures.GazePosition()
# Timestamp gaze position
gaze_position.timestamp = time.time() - start_time + start_ts
# Store gaze position
ts_gaze_positions.append(gaze_position)
return ts_gaze_positions
class TestVelocityThresholdIdentificationClass(unittest.TestCase):
"""Test VelocityThresholdIdentification class."""
def test_fixation_identification(self):
"""Test VelocityThresholdIdentification fixation identification."""
size = 10
center = (0, 0)
deviation_max = 10
min_time = 0.05
max_time = 0.1
velocity_max = deviation_max / min_time
ts_gaze_positions = build_gaze_fixation(size, center, deviation_max, min_time, max_time)
gaze_movement_identifier = VelocityThresholdIdentification.GazeMovementIdentifier(velocity_max_threshold=velocity_max, duration_min_threshold=max_time*2)
ts_fixations, ts_saccades, ts_status = gaze_movement_identifier.browse(ts_gaze_positions)
# Check result size
self.assertEqual(len(ts_fixations), 1)
self.assertEqual(len(ts_saccades), 0)
self.assertEqual(len(ts_status), size - 1)
# Check fixation
fixation = ts_fixations.pop(0)
self.assertEqual(len(fixation), size - 1)
self.assertGreaterEqual(fixation.duration, (size - 2) * min_time)
self.assertLessEqual(fixation.duration, (size - 2) * max_time)
self.assertLessEqual(fixation.is_finished(), True)
def test_fixation_and_direct_saccade_identification(self):
"""Test VelocityThresholdIdentification fixation and saccade identification."""
size = 10
center_A = (0, 0)
center_B = (500, 500)
deviation_max = 10
min_time = 0.05
max_time = 0.1
velocity_max = deviation_max / min_time
ts_gaze_positions_A = build_gaze_fixation(size, center_A, deviation_max, min_time, max_time)
ts_gaze_positions_B = build_gaze_fixation(size, center_B, deviation_max, min_time, max_time, start_ts=ts_gaze_positions_A[-1].timestamp)
ts_gaze_positions = ts_gaze_positions_A + ts_gaze_positions_B
gaze_movement_identifier = VelocityThresholdIdentification.GazeMovementIdentifier(velocity_max_threshold=velocity_max, duration_min_threshold=max_time*2)
ts_fixations, ts_saccades, ts_status = gaze_movement_identifier.browse(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 - 1)
# Check first fixation
fixation = ts_fixations.pop(0)
self.assertEqual(len(fixation), size - 1)
self.assertGreaterEqual(fixation.duration, (size - 2) * min_time)
self.assertLessEqual(fixation.duration, (size - 2) * max_time)
self.assertLessEqual(fixation.is_finished(), True)
# Check first saccade
saccade = ts_saccades.pop(0)
self.assertEqual(len(saccade), 2)
self.assertGreaterEqual(saccade.duration, min_time)
self.assertLessEqual(saccade.duration, max_time)
self.assertLessEqual(saccade.is_finished(), True)
# Check that last position of a movement is equal to first position of next movement
self.assertEqual(fixation[-1].timestamp, saccade[0].timestamp)
self.assertEqual(fixation[-1].value, saccade[0].value)
# Check second fixation
fixation = ts_fixations.pop(0)
self.assertEqual(len(fixation), size)
self.assertGreaterEqual(fixation.duration, (size - 1) * min_time)
self.assertLessEqual(fixation.duration, (size - 1) * max_time)
self.assertLessEqual(fixation.is_finished(), True)
# Check that last position of a movement is equal to first position of next movement
self.assertEqual(saccade[-1].timestamp, fixation[0].timestamp)
self.assertEqual(saccade[-1].value, fixation[0].value)
def test_fixation_and_short_saccade_identification(self):
"""Test VelocityThresholdIdentification fixation and saccade identification."""
size = 10
move = 2
center_A = (0, 0)
out_A = (10, 10)
center_B = (50, 50)
deviation_max = 10
min_time = 0.05
max_time = 0.1
velocity_max = deviation_max / min_time
ts_gaze_positions_A = build_gaze_fixation(size, center_A, deviation_max, min_time, max_time)
ts_move_positions = build_gaze_saccade(move, out_A, center_B, min_time, min_time, start_ts=ts_gaze_positions_A[-1].timestamp)
ts_gaze_positions_B = build_gaze_fixation(size, center_B, deviation_max, min_time, max_time, start_ts=ts_move_positions[-1].timestamp)
ts_gaze_positions = ts_gaze_positions_A + ts_move_positions + ts_gaze_positions_B
gaze_movement_identifier = VelocityThresholdIdentification.GazeMovementIdentifier(velocity_max_threshold=velocity_max, duration_min_threshold=max_time*2)
ts_fixations, ts_saccades, ts_status = gaze_movement_identifier.browse(ts_gaze_positions)
# Check result size
self.assertEqual(len(ts_fixations), 2)
self.assertEqual(len(ts_saccades), 1)
self.assertEqual(len(ts_status), 2 * size + move - 1)
# Check first fixation
fixation = ts_fixations.pop(0)
self.assertEqual(len(fixation), size - 1) # BUG: NOT ALWAYS TRUE !!!
self.assertGreaterEqual(fixation.duration, (size - 2) * min_time)
self.assertLessEqual(fixation.duration, (size - 2) * max_time)
self.assertLessEqual(fixation.is_finished(), True)
# Check first saccade
saccade = ts_saccades.pop(0)
self.assertEqual(len(saccade), move + 2)
self.assertGreaterEqual(saccade.duration, (move + 1) * min_time)
self.assertLessEqual(saccade.duration, (move + 1) * max_time)
self.assertLessEqual(saccade.is_finished(), True)
# Check that last position of a movement is equal to first position of next movement
self.assertEqual(fixation[-1].timestamp, saccade[0].timestamp)
self.assertEqual(fixation[-1].value, saccade[0].value)
# Check second fixation
fixation = ts_fixations.pop(0)
self.assertEqual(len(fixation), size)
self.assertGreaterEqual(fixation.duration, (size - 1) * min_time)
self.assertLessEqual(fixation.duration, (size - 1) * max_time)
self.assertLessEqual(fixation.is_finished(), True)
# Check that last position of a movement is equal to first position of next movement
self.assertEqual(saccade[-1], fixation[0])
self.assertEqual(saccade[-1].value, fixation[0].value)
def test_invalid_gaze_position(self):
"""Test VelocityThresholdIdentification fixation and saccade identification with invalid gaze position."""
size = 15
center = (0, 0)
deviation_max = 10
min_time = 0.05
max_time = 0.1
velocity_max = deviation_max / min_time
validity = [True, True, True, True, True, True, True, False, False, False, True, True, True, True, True]
ts_gaze_positions = build_gaze_fixation(size, center, deviation_max, min_time, max_time, validity=validity)
gaze_movement_identifier = VelocityThresholdIdentification.GazeMovementIdentifier(velocity_max_threshold=velocity_max, duration_min_threshold=max_time*2)
ts_fixations, ts_saccades, ts_status = gaze_movement_identifier.browse(ts_gaze_positions)
# Check result size
self.assertEqual(len(ts_fixations), 2)
self.assertEqual(len(ts_saccades), 0)
self.assertEqual(len(ts_status), len(validity)-5)
# Check first fixation
fixation = ts_fixations.pop(0)
self.assertEqual(len(fixation), 6)
self.assertGreaterEqual(fixation.duration, 5 * min_time)
self.assertLessEqual(fixation.duration, 5 * max_time)
self.assertLessEqual(fixation.is_finished(), True)
# Check second fixation
fixation = ts_fixations.pop(0)
self.assertEqual(len(fixation), 4)
self.assertGreaterEqual(fixation.duration, 3 * min_time)
self.assertLessEqual(fixation.duration, 3 * max_time)
self.assertLessEqual(fixation.is_finished(), True)
def test_identification_browsing(self):
"""Test VelocityThresholdIdentification identification browsing."""
size = 10
center_A = (0, 0)
center_B = (50, 50)
deviation_max = 10
min_time = 0.01
max_time = 0.1
velocity_max = deviation_max / min_time
ts_gaze_positions_A = build_gaze_fixation(size, center_A, deviation_max, min_time, max_time)
ts_gaze_positions_B = build_gaze_fixation(size, center_B, deviation_max, min_time, max_time, start_ts=ts_gaze_positions_A[-1].timestamp)
ts_gaze_positions = ts_gaze_positions_A + ts_gaze_positions_B
gaze_movement_identifier = VelocityThresholdIdentification.GazeMovementIdentifier(velocity_max_threshold=velocity_max, duration_min_threshold=max_time*2)
# Iterate on gaze positions
for gaze_position in ts_gaze_positions:
finished_gaze_movement = gaze_movement_identifier.identify(gaze_position.timestamp, gaze_position, terminate=(gaze_position.timestamp == ts_gaze_positions[-1]))
# Check that last gaze position date is not equal to given gaze position date
if finished_gaze_movement:
self.assertNotEqual(finished_gaze_movement[-1].timestamp, gaze_position.timestamp)
# Check that last gaze position date of current movement is equal to given gaze position date
current_gaze_movement = gaze_movement_identifier.current_gaze_movement
if current_gaze_movement:
self.assertEqual(current_gaze_movement[-1].timestamp, gaze_position.timestamp)
if __name__ == '__main__':
unittest.main()
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