def setUp(self):
"""
Create the UI
"""
Registry.create()
self.setup_application()
ScreenList.create(self.app.desktop())
self.image_manager = ImageManager()
self.lock = Lock()
self.sleep_time = 0.1
def setUp(self):
"""
Create the UI
"""
Registry.create()
self.app = QtGui.QApplication.instance()
ScreenList.create(self.app.desktop())
self.image_manager = ImageManager()
class TestImageManager(TestCase):
def setUp(self):
"""
Create the UI
"""
Registry.create()
self.app = QtGui.QApplication.instance()
ScreenList.create(self.app.desktop())
self.image_manager = ImageManager()
def tearDown(self):
"""
Delete all the C++ objects at the end so that we don't have a segfault
"""
del self.app
def basic_image_manager_test(self):
"""
Test the Image Manager setup basic functionality
"""
# GIVEN: the an image add to the image manager
self.image_manager.add_image(TEST_PATH, 'church.jpg', None)
# WHEN the image is retrieved
image = self.image_manager.get_image(TEST_PATH, 'church.jpg')
# THEN returned record is a type of image
self.assertEqual(isinstance(image, QtGui.QImage), True, 'The returned object should be a QImage')
# WHEN: The image bytes are requested.
byte_array = self.image_manager.get_image_bytes(TEST_PATH, 'church.jpg')
# THEN: Type should be a str.
self.assertEqual(isinstance(byte_array, str), True, 'The returned object should be a str')
# WHEN the image is retrieved has not been loaded
# THEN a KeyError is thrown
with self.assertRaises(KeyError) as context:
self.image_manager.get_image(TEST_PATH, 'church1.jpg')
self.assertNotEquals(context.exception, '', 'KeyError exception should have been thrown for missing image')
class TestImageManager(TestCase, TestMixin):
def setUp(self):
"""
Create the UI
"""
Registry.create()
self.setup_application()
ScreenList.create(self.app.desktop())
self.image_manager = ImageManager()
self.lock = Lock()
self.sleep_time = 0.1
def tearDown(self):
"""
Delete all the C++ objects at the end so that we don't have a segfault
"""
del self.app
def basic_image_manager_test(self):
"""
Test the Image Manager setup basic functionality
"""
# GIVEN: the an image add to the image manager
full_path = os.path.normpath(os.path.join(TEST_PATH, 'church.jpg'))
self.image_manager.add_image(full_path, 'church.jpg', None)
# WHEN the image is retrieved
image = self.image_manager.get_image(full_path, 'church.jpg')
# THEN returned record is a type of image
self.assertEqual(isinstance(image, QtGui.QImage), True, 'The returned object should be a QImage')
# WHEN: The image bytes are requested.
byte_array = self.image_manager.get_image_bytes(full_path, 'church.jpg')
# THEN: Type should be a str.
self.assertEqual(isinstance(byte_array, str), True, 'The returned object should be a str')
# WHEN the image is retrieved has not been loaded
# THEN a KeyError is thrown
with self.assertRaises(KeyError) as context:
self.image_manager.get_image(TEST_PATH, 'church1.jpg')
self.assertNotEquals(context.exception, '', 'KeyError exception should have been thrown for missing image')
def different_dimension_image_test(self):
"""
Test the Image Manager with dimensions
"""
# GIVEN: add an image with specific dimensions
full_path = os.path.normpath(os.path.join(TEST_PATH, 'church.jpg'))
self.image_manager.add_image(full_path, 'church.jpg', None, 80, 80)
# WHEN: the image is retrieved
image = self.image_manager.get_image(full_path, 'church.jpg', 80, 80)
# THEN: The return should be of type image
self.assertEqual(isinstance(image, QtGui.QImage), True, 'The returned object should be a QImage')
# WHEN: adding the same image with different dimensions
self.image_manager.add_image(full_path, 'church.jpg', None, 100, 100)
# THEN: the cache should contain two pictures
self.assertEqual(len(self.image_manager._cache), 2,
'Image manager should consider two dimensions of the same picture as different')
# WHEN: adding the same image with first dimensions
self.image_manager.add_image(full_path, 'church.jpg', None, 80, 80)
# THEN: the cache should still contain only two pictures
self.assertEqual(len(self.image_manager._cache), 2, 'Same dimensions should not be added again')
# WHEN: calling with correct image, but wrong dimensions
with self.assertRaises(KeyError) as context:
self.image_manager.get_image(full_path, 'church.jpg', 120, 120)
self.assertNotEquals(context.exception, '', 'KeyError exception should have been thrown for missing dimension')
def process_cache_test(self):
"""
Test the process_cache method
"""
with patch('openlp.core.lib.imagemanager.resize_image') as mocked_resize_image, \
patch('openlp.core.lib.imagemanager.image_to_byte') as mocked_image_to_byte:
# GIVEN: Mocked functions
mocked_resize_image.side_effect = self.mocked_resize_image
mocked_image_to_byte.side_effect = self.mocked_image_to_byte
image1 = 'church.jpg'
image2 = 'church2.jpg'
image3 = 'church3.jpg'
image4 = 'church4.jpg'
# WHEN: Add the images. Then get the lock (=queue can not be processed).
self.lock.acquire()
self.image_manager.add_image(TEST_PATH, image1, None)
self.image_manager.add_image(TEST_PATH, image2, None)
# THEN: All images have been added to the queue, and only the first image is not be in the list anymore, but
# is being processed (see mocked methods/functions).
# Note: Priority.Normal means, that the resize_image() was not completed yet (because afterwards the #
# priority is adjusted to Priority.Lowest).
self.assertEqual(self.get_image_priority(image1), Priority.Normal,
"image1's priority should be 'Priority.Normal'")
self.assertEqual(self.get_image_priority(image2), Priority.Normal,
"image2's priority should be 'Priority.Normal'")
# WHEN: Add more images.
self.image_manager.add_image(TEST_PATH, image3, None)
self.image_manager.add_image(TEST_PATH, image4, None)
# Allow the queue to process.
self.lock.release()
# Request some "data".
image_bytes = self.image_manager.get_image_bytes(TEST_PATH, image4)
image_object = self.image_manager.get_image(TEST_PATH, image3)
# Now the mocked methods/functions do not have to sleep anymore.
self.sleep_time = 0
# Wait for the queue to finish.
while not self.image_manager._conversion_queue.empty():
time.sleep(0.1)
# Because empty() is not reliable, wait a litte; just to make sure.
time.sleep(0.1)
# THEN: The images' priority reflect how they were processed.
self.assertEqual(self.image_manager._conversion_queue.qsize(), 0, "The queue should be empty.")
self.assertEqual(self.get_image_priority(image1), Priority.Lowest,
"The image should have not been requested (=Lowest)")
self.assertEqual(self.get_image_priority(image2), Priority.Lowest,
"The image should have not been requested (=Lowest)")
self.assertEqual(self.get_image_priority(image3), Priority.Low,
"Only the QImage should have been requested (=Low).")
self.assertEqual(self.get_image_priority(image4), Priority.Urgent,
"The image bytes should have been requested (=Urgent).")
def get_image_priority(self, image):
"""
This is a help method to get the priority of the given image out of the image_manager's cache.
NOTE: This requires, that the image has been added to the image manager using the *TEST_PATH*.
:param image: The name of the image. E. g. ``image1``
"""
return self.image_manager._cache[(TEST_PATH, image, -1, -1)].priority
def mocked_resize_image(self, *args):
"""
This is a mocked method, so that we can control the work flow of the image manager.
"""
self.lock.acquire()
self.lock.release()
# The sleep time is adjusted in the test case.
time.sleep(self.sleep_time)
return QtGui.QImage()
def mocked_image_to_byte(self, *args):
"""
This is a mocked method, so that we can control the work flow of the image manager.
"""
self.lock.acquire()
self.lock.release()
# The sleep time is adjusted in the test case.
time.sleep(self.sleep_time)
return ''
