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test_camera_manager.py
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298 lines (243 loc) · 10.5 KB
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import unittest
import sys
import os
from mpos import CameraManager
class TestCameraClass(unittest.TestCase):
"""Test Camera class functionality."""
def test_camera_creation_with_all_params(self):
"""Test creating a camera with all parameters."""
cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK,
name="OV5640",
vendor="OmniVision",
version=2
)
self.assertEqual(cam.lens_facing, CameraManager.CameraCharacteristics.LENS_FACING_BACK)
self.assertEqual(cam.name, "OV5640")
self.assertEqual(cam.vendor, "OmniVision")
self.assertEqual(cam.version, 2)
def test_camera_creation_with_defaults(self):
"""Test creating a camera with default parameters."""
cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_FRONT
)
self.assertEqual(cam.lens_facing, CameraManager.CameraCharacteristics.LENS_FACING_FRONT)
self.assertEqual(cam.name, "Camera")
self.assertEqual(cam.vendor, "Unknown")
self.assertEqual(cam.version, 1)
def test_camera_repr(self):
"""Test Camera __repr__ method."""
cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK,
name="TestCam"
)
repr_str = repr(cam)
self.assertIn("TestCam", repr_str)
self.assertIn("BACK", repr_str)
def test_camera_repr_front(self):
"""Test Camera __repr__ with front-facing camera."""
cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_FRONT,
name="FrontCam"
)
repr_str = repr(cam)
self.assertIn("FrontCam", repr_str)
self.assertIn("FRONT", repr_str)
def test_camera_repr_external(self):
"""Test Camera __repr__ with external camera."""
cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_EXTERNAL,
name="USBCam"
)
repr_str = repr(cam)
self.assertIn("USBCam", repr_str)
self.assertIn("EXTERNAL", repr_str)
class TestCameraCharacteristics(unittest.TestCase):
"""Test CameraCharacteristics constants."""
def test_lens_facing_constants(self):
"""Test that lens facing constants are defined."""
self.assertEqual(CameraManager.CameraCharacteristics.LENS_FACING_BACK, 0)
self.assertEqual(CameraManager.CameraCharacteristics.LENS_FACING_FRONT, 1)
self.assertEqual(CameraManager.CameraCharacteristics.LENS_FACING_EXTERNAL, 2)
def test_constants_are_unique(self):
"""Test that all constants are unique."""
constants = [
CameraManager.CameraCharacteristics.LENS_FACING_BACK,
CameraManager.CameraCharacteristics.LENS_FACING_FRONT,
CameraManager.CameraCharacteristics.LENS_FACING_EXTERNAL
]
self.assertEqual(len(constants), len(set(constants)))
class TestCameraManagerFunctionality(unittest.TestCase):
"""Test CameraManager core functionality."""
def setUp(self):
"""Clear cameras before each test."""
# Reset the module state
CameraManager._cameras = []
def tearDown(self):
"""Clean up after each test."""
CameraManager._cameras = []
def test_is_available(self):
"""Test is_available() returns True after initialization."""
self.assertTrue(CameraManager.is_available())
def test_add_camera_single(self):
"""Test adding a single camera."""
cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK,
name="TestCam"
)
result = CameraManager.add_camera(cam)
self.assertTrue(result)
self.assertEqual(CameraManager.get_camera_count(), 1)
def test_add_camera_multiple(self):
"""Test adding multiple cameras."""
back_cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK,
name="BackCam"
)
front_cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_FRONT,
name="FrontCam"
)
CameraManager.add_camera(back_cam)
CameraManager.add_camera(front_cam)
self.assertEqual(CameraManager.get_camera_count(), 2)
def test_add_camera_invalid_type(self):
"""Test adding invalid object as camera."""
result = CameraManager.add_camera("not a camera")
self.assertFalse(result)
self.assertEqual(CameraManager.get_camera_count(), 0)
def test_get_cameras_empty(self):
"""Test getting cameras when none registered."""
cameras = CameraManager.get_cameras()
self.assertEqual(len(cameras), 0)
self.assertIsInstance(cameras, list)
def test_get_cameras_returns_copy(self):
"""Test that get_cameras() returns a copy, not reference."""
cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK
)
CameraManager.add_camera(cam)
cameras1 = CameraManager.get_cameras()
cameras2 = CameraManager.get_cameras()
# Should be equal but not the same object
self.assertEqual(len(cameras1), len(cameras2))
self.assertIsNot(cameras1, cameras2)
def test_get_cameras_multiple(self):
"""Test getting multiple cameras."""
back_cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK,
name="BackCam"
)
front_cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_FRONT,
name="FrontCam"
)
CameraManager.add_camera(back_cam)
CameraManager.add_camera(front_cam)
cameras = CameraManager.get_cameras()
self.assertEqual(len(cameras), 2)
names = [c.name for c in cameras]
self.assertIn("BackCam", names)
self.assertIn("FrontCam", names)
def test_get_camera_by_facing_back(self):
"""Test getting back-facing camera."""
back_cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK,
name="BackCam"
)
CameraManager.add_camera(back_cam)
found = CameraManager.get_camera_by_facing(
CameraManager.CameraCharacteristics.LENS_FACING_BACK
)
self.assertIsNotNone(found)
self.assertEqual(found.name, "BackCam")
def test_get_camera_by_facing_front(self):
"""Test getting front-facing camera."""
front_cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_FRONT,
name="FrontCam"
)
CameraManager.add_camera(front_cam)
found = CameraManager.get_camera_by_facing(
CameraManager.CameraCharacteristics.LENS_FACING_FRONT
)
self.assertIsNotNone(found)
self.assertEqual(found.name, "FrontCam")
def test_get_camera_by_facing_not_found(self):
"""Test getting camera that doesn't exist."""
back_cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK
)
CameraManager.add_camera(back_cam)
found = CameraManager.get_camera_by_facing(
CameraManager.CameraCharacteristics.LENS_FACING_FRONT
)
self.assertIsNone(found)
def test_get_camera_by_facing_returns_first(self):
"""Test that get_camera_by_facing returns first matching camera."""
# Add two back-facing cameras
back_cam1 = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK,
name="BackCam1"
)
back_cam2 = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK,
name="BackCam2"
)
CameraManager.add_camera(back_cam1)
CameraManager.add_camera(back_cam2)
found = CameraManager.get_camera_by_facing(
CameraManager.CameraCharacteristics.LENS_FACING_BACK
)
self.assertEqual(found.name, "BackCam1")
def test_has_camera_empty(self):
"""Test has_camera() when no cameras registered."""
self.assertFalse(CameraManager.has_camera())
def test_has_camera_with_cameras(self):
"""Test has_camera() when cameras registered."""
cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK
)
CameraManager.add_camera(cam)
self.assertTrue(CameraManager.has_camera())
def test_get_camera_count_empty(self):
"""Test get_camera_count() when no cameras."""
self.assertEqual(CameraManager.get_camera_count(), 0)
def test_get_camera_count_multiple(self):
"""Test get_camera_count() with multiple cameras."""
for i in range(3):
cam = CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK,
name=f"Camera{i}"
)
CameraManager.add_camera(cam)
self.assertEqual(CameraManager.get_camera_count(), 3)
class TestCameraManagerUsagePattern(unittest.TestCase):
"""Test the usage pattern from the task description."""
def setUp(self):
"""Clear cameras before each test."""
CameraManager._cameras = []
def tearDown(self):
"""Clean up after each test."""
CameraManager._cameras = []
def test_task_usage_pattern(self):
"""Test the exact usage pattern from the task description."""
# Register a camera (as done in board init)
CameraManager.add_camera(CameraManager.Camera(
lens_facing=CameraManager.CameraCharacteristics.LENS_FACING_BACK
))
# App usage pattern
cam_list = CameraManager.get_cameras()
if len(cam_list) > 0:
has_camera = True
else:
has_camera = False
self.assertTrue(has_camera)
def test_task_usage_pattern_no_camera(self):
"""Test usage pattern when no camera available."""
cam_list = CameraManager.get_cameras()
if len(cam_list) > 0:
has_camera = True
else:
has_camera = False
self.assertFalse(has_camera)