def test_create(self):
# Make a new file if it doesn't exist
os.remove(self.tempfile.name)
storage = MbtilesStorage.create(renderer=self.renderer,
filename=self.tempfile.name,
metadata=self.metadata)
self.assertEqual(storage.filename, self.tempfile.name)
self.assertEqual(storage.mbtiles.metadata, self.metadata)
self.assertTrue(os.path.isfile(self.tempfile.name))
# Make a duplicate file
MbtilesStorage.create(renderer=self.renderer,
filename=self.tempfile.name,
metadata=self.metadata)
self.assertEqual(storage.filename, self.tempfile.name)
self.assertTrue(os.path.isfile(self.tempfile.name))
def test_zoom_offset(self):
with NamedTemporaryFile(suffix='.mbtiles') as outputfile:
metadata = dict(
name='bluemarble-aligned',
type='baselayer',
version='1.0.0',
description='BlueMarble 2004-07 Aligned',
format='png',
)
warp_mbtiles(inputfile=self.inputfile,
outputfile=outputfile.name,
metadata=metadata,
min_resolution=0,
max_resolution=3,
zoom_offset=2,
renderer=TouchRenderer(suffix='.png'))
with MbtilesStorage(renderer=None,
filename=outputfile.name) as storage:
self.assertEqual(
set((z, x, y) for z, x, y, data in storage.mbtiles.all()),
set([(2, 0, 0)] + [(3, x, y) for x in range(0, 2)
for y in range(0, 2)] +
[(4, x, y) for x in range(0, 4)
for y in range(0, 4)] + [(5, x, y)
for x in range(0, 8)
for y in range(0, 8)]))
self.assertEqual(storage.mbtiles.metadata['bounds'],
'-180.0,-90.0,0.0,0.0')
self.assertEqual(storage.mbtiles.metadata['x-minzoom'], '2')
self.assertEqual(storage.mbtiles.metadata['x-maxzoom'], '5')
def test_save(self):
# We must create this on disk
self.storage = MbtilesStorage.create(renderer=self.renderer,
filename=self.tempfile.name,
metadata=self.metadata)
# Transparent 1×1 image
image = VImage.new_rgba(width=1, height=1,
ink=rgba(r=0, g=0, b=0, a=0))
# Save it twice, assuming that MBTiles will deduplicate
self.storage.save(x=0, y=1, z=2, image=image)
self.storage.save(x=1, y=0, z=2, image=image)
self.storage.waitall()
# Assert that things were saved properly
self.assertEqual(
[(z, x, y, intmd5(data))
for z, x, y, data in self.storage.mbtiles.all()],
[
(2, 0, 1, 89446660811628514001822794642426893173),
(2, 1, 0, 89446660811628514001822794642426893173),
]
)
# Close the existing database.
self.storage.mbtiles.close()
# Re-open the created file
storage = MbtilesStorage(renderer=self.renderer,
filename=self.tempfile.name)
# Read out of the backend
self.assertEqual(
[(z, x, y, intmd5(data))
for z, x, y, data in storage.mbtiles.all()],
[
(2, 0, 1, 89446660811628514001822794642426893173),
(2, 1, 0, 89446660811628514001822794642426893173),
]
)
def setUp(self):
self.tempfile = NamedTemporaryFile()
# Use the PngRenderer because we want to know that callback
# works properly.
self.renderer = PngRenderer(png8=False, optimize=False)
self.metadata = dict(
name='transparent',
type=Metadata.latest().TYPES.BASELAYER,
version='1.0.0',
description='Transparent World 2012',
format=Metadata.latest().FORMATS.PNG,
)
self.storage = MbtilesStorage.create(renderer=self.renderer,
filename=':memory:',
metadata=self.metadata)