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tests.py
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tests.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import unittest
import json
from vector_tile import renderer
from vector_tile import vector_tile_pb2
class TestRequestCtrans(unittest.TestCase):
def test_lonlat2merc(self):
# projection transform
# should roughtly match: echo -180 -85 | cs2cs -f "%.10f" +init=epsg:4326 +to +init=epsg:3857
x,y = renderer.lonlat2merc(-180,-85)
self.assertAlmostEqual(-20037508.342789244,x)
self.assertAlmostEqual(-19971868.8804085888,y)
def test_box2d(self):
box = renderer.Box2d(-180,-85,180,85)
assert box.minx == -180
assert box.miny == -85
assert box.maxx == 180
assert box.maxy == 85
assert box.intersects(0,0)
assert not box.intersects(-180,-90)
self.assertAlmostEqual(box.bounds(),[box.minx,box.miny,box.maxx,box.maxy])
def test_spherical_mercator(self):
merc = renderer.SphericalMercator()
z0_extent = merc.bbox(0,0,0)
#todo this seems like it should test something
def test_request_z0(self):
zoom, x, y = 0, 0, 0
req = renderer.Request(x,y,zoom)
self.assertAlmostEqual(req.get_width(),40075016.68557849)
self.assertAlmostEqual(req.get_height(),40075016.68557849)
def test_request_z7(self):
zoom, x, y = 7, 20, 49
req = renderer.Request(x,y,zoom)
assert req.zoom == zoom and req.x == x and req.y == y
assert req.size == 256
assert abs(req.get_width() - 313086.0700000003) < 1
assert abs(req.get_height() - 313085.8099999996) < 1
assert req.extent.intersects(-13469658, 4579425)# -121,38
assert not req.extent.intersects(-14471533.80, 5621521.49)
def test_ctrans_z0(self):
req = renderer.Request(0,0,0)
x,y = renderer.lonlat2merc(-180,-85)
ctrans = renderer.CoordTransform(req)
px,py = ctrans.forward(x,y)
self.assertAlmostEqual(px,0.0)
self.assertAlmostEqual(py,255.5806938147701)
px2,py2 = ctrans.forward(-20037508.34,-20037508.34)
self.assertAlmostEqual(px2,0.0)
self.assertAlmostEqual(py2,256.0)
px3,py3 = ctrans.forward(-20037508.34/2,-20037508.34/2)
self.assertAlmostEqual(px2,0.0)
self.assertAlmostEqual(py2,256.0)
def test_ctrans_z7(self):
""" Test render.CoordTransform """
zoom, x, y = 7, 20, 49
req = renderer.Request(x,y,zoom)
transform = renderer.CoordTransform(req)
testX, testY = -13469658, 4579425
projectedX, projectedY = transform.forward(testX, testY)
assert projectedX > 0 and projectedX < 256
assert projectedY > 0 and projectedY < 256
reversedX, reversedY = transform.backward(projectedX, projectedY)
assert abs(testX - reversedX) < 1
assert abs(testY - reversedY) < 1
class TestTileCreation(unittest.TestCase):
def test_layer_creation(self):
""" Test creating an empty tile and an empty layer """
req = renderer.Request(0,0,0)
vtile = renderer.VectorTile(req)
assert isinstance(vtile.tile, vector_tile_pb2.Tile)
self.assertEqual(len(vtile.tile.layers), 0)
layer = vtile.add_layer(name="points")
assert layer is not None and isinstance(layer, vector_tile_pb2.Tile.Layer)
self.assertEqual(len(vtile.tile.layers), 1)
self.assertEqual(vtile.tile.layers[0], layer)
self.assertEqual(len(layer.features), 0)
def test_simple_tile_z0(self):
""" Test creating a tile, adding a single layer and a single point """
req = renderer.Request(0,0,0)
vtile = renderer.VectorTile(req)
#Test creating a layer
layerName = "points"
layer = vtile.add_layer(name=layerName)
#test adding a point feature
lat, lng = 38, -121
attr = {"hello":"world"}
x,y = renderer.lonlat2merc(lng,lat)
assert vtile.add_point(layer,x,y,attr)
assert len(layer.features) == 1
feature = layer.features[0]
key_id = feature.tags[0]
value_id = feature.tags[1]
key = str(layer.keys[key_id])
assert key == "hello"
value = layer.values[value_id]
assert value.HasField('string_value')
assert value.string_value == "world"
#dump the layer to GeoJSON and make sure the output matches the input
j_obj = vtile.to_geojson(layer_names=True, lonlat=True)
assert isinstance(j_obj, dict)
self.assertEqual(j_obj["type"], "FeatureCollection")
self.assertEqual(len(j_obj["features"]), 1)
self.assertEqual(j_obj["features"][0]["geometry"]["type"], "Point")
self.assertEqual(len(j_obj["features"][0]["geometry"]["coordinates"]), 2)
self.assertAlmostEqual(j_obj["features"][0]["geometry"]["coordinates"][0], lng, 0)
self.assertAlmostEqual(j_obj["features"][0]["geometry"]["coordinates"][1], lat, 0)
self.assertEqual(j_obj["features"][0]["properties"]["layer"], layerName)
self.assertEqual(j_obj["features"][0]["properties"]["hello"], "world")
#now dump tile to protocol buffer message
pbf = vtile.to_message()
assert len(pbf) > 0
tile = vector_tile_pb2.Tile()
tile.ParseFromString(pbf)
vtile2 = renderer.VectorTile(req, tile)
j_obj_deserialized = vtile2.to_geojson(layer_names=True, lonlat=True)
self.assertDictEqual(j_obj, j_obj_deserialized)
def test_attribute_types(self):
""" Test that all attribute types are handled correctly """
req = renderer.Request(0,0,0)
vtile = renderer.VectorTile(req)
layer = vtile.add_layer(name="points")
attr = {"name":"DC",
"integer":10,
"bigint":sys.maxsize,
"nbigint":-1 * sys.maxsize,
"float":1.5,
"bigfloat":float(sys.maxsize),
"unistr":u"élan",
"bool":True,
"bool2":False
}
vtile.add_point(layer,0,0,attr)
j_obj = vtile.to_geojson()
self.assertEqual(j_obj['type'],"FeatureCollection")
self.assertEqual(len(j_obj['features']),1)
feature = j_obj['features'][0]
self.assertDictEqual(feature['properties'],attr)
def test_key_value_deduplication(self):
""" Test that keys and values are properly deduplicated """
req = renderer.Request(0,0,0)
vtile = renderer.VectorTile(req)
layer = vtile.add_layer(name="points")
assert len(layer.keys) == 0 and len(layer.values) == 0
width = req.get_width()
height = req.get_height()
attr = {"hello":"world"}
#add a point, it should add 1 key and 1 value
vtile.add_point(layer, width*.1, height*.1, attr)
assert len(layer.keys) == 1 and len(layer.values) == 1
#add another feature with the same key and value
vtile.add_point(layer, width*.2, height*.2, attr)
assert len(layer.keys) == 1 and len(layer.values) == 1
#add another feature with existing key and new value
vtile.add_point(layer, width*.4, height*.3, {"hello":"mars"})
assert len(layer.keys) == 1 and len(layer.values) == 2
#add another feature with an existing value and a new key
vtile.add_point(layer, width*.5, height*.5, {"goodbye":"world"})
assert len(layer.keys) == 2 and len(layer.values) == 2
def test_adding_duplicate_points(self):
""" Test that points are deduplicated """
req = renderer.Request(0,0,0)
vtile = renderer.VectorTile(req)
layer = vtile.add_layer(name="points")
vtile.add_point(layer, 0,0,{})
vtile.add_point(layer, 0,0,{})
self.assertEqual(len(layer.features), 1)
j_obj = vtile.to_geojson()
self.assertEqual(len(j_obj['features']),1)
def test_vtile_z0(self):
""" Test adding points at zoom 0 """
req = renderer.Request(0,0,0)
vtile = renderer.VectorTile(req)
layer = vtile.add_layer(name="points")
x,y = -8526703.378081053, 4740318.745473632
vtile.add_point(layer,x,y,{})
j_obj = vtile.to_geojson()
feature = j_obj['features'][0]
coords = feature['geometry']['coordinates']
self.assertAlmostEqual(coords[0],x,-4)
self.assertAlmostEqual(coords[1],y,-4)
def test_vtile_z20(self):
""" Test adding points at zoom 20 """
merc = renderer.SphericalMercator()
x,y = -8526703.378081053, 4740318.745473632
xyz_bounds = merc.xyz([x,y,x,y],20)
req = renderer.Request(xyz_bounds[0],xyz_bounds[1],20)
vtile = renderer.VectorTile(req)
layer = vtile.add_layer(name="points")
vtile.add_point(layer,x,y,{})
j_obj = vtile.to_geojson()
feature = j_obj['features'][0]
coords = feature['geometry']['coordinates']
self.assertAlmostEqual(coords[0],x,2)
self.assertAlmostEqual(coords[1],y,2)
def test_vtile_z20_higher_precision(self):
""" Test adding points at zoom 20 with larger than standard path multiplier """
merc = renderer.SphericalMercator()
x,y = -8526703.378081053, 4740318.745473632
xyz_bounds = merc.xyz([x,y,x,y],20)
req = renderer.Request(xyz_bounds[0],xyz_bounds[1],20)
vtile = renderer.VectorTile(req,path_multiplier=512)
layer = vtile.add_layer(name="points")
vtile.add_point(layer,x,y,{})
j_obj = vtile.to_geojson()
feature = j_obj['features'][0]
coords = feature['geometry']['coordinates']
self.assertAlmostEqual(coords[0],x,3)
self.assertAlmostEqual(coords[1],y,3)
def test_vtile_z22(self):
""" Test adding points at zoom 22 """
merc = renderer.SphericalMercator()
x,y = -8526703.378081053, 4740318.745473632
xyz_bounds = merc.xyz([x,y,x,y],22)
req = renderer.Request(xyz_bounds[0],xyz_bounds[1],22)
vtile = renderer.VectorTile(req)
layer = vtile.add_layer(name="points")
vtile.add_point(layer,x,y,{})
j_obj = vtile.to_geojson()
feature = j_obj['features'][0]
coords = feature['geometry']['coordinates']
self.assertAlmostEqual(coords[0],x,2)
self.assertAlmostEqual(coords[1],y,1)
def test_vtile_z22_higher_precision(self):
""" Test adding points at zoom 22 with larger than standard path multiplier """
merc = renderer.SphericalMercator()
x,y = -8526703.378081053, 4740318.745473632
xyz_bounds = merc.xyz([x,y,x,y],22)
req = renderer.Request(xyz_bounds[0],xyz_bounds[1],22)
vtile = renderer.VectorTile(req,path_multiplier=512)
layer = vtile.add_layer(name="points")
vtile.add_point(layer,x,y,{})
j_obj = vtile.to_geojson()
feature = j_obj['features'][0]
coords = feature['geometry']['coordinates']
self.assertAlmostEqual(coords[0],x,4)
self.assertAlmostEqual(coords[1],y,4)
if __name__ == '__main__':
unittest.main()