sij/mapnik
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

touch sqlite tests further

Browse source
This commit is contained in:
Dane Springmeyer 2012-04-18 16:06:18 -07:00
parent f8e6b4f27d
commit f977134afd
1 changed files with 41 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

48
tests/python_tests/sqlite_rtree_test.py
View file

@ -73,25 +73,58 @@ if 'sqlite' in mapnik.DatasourceCache.instance().plugin_names():
def test_geometry_round_trip():
test_db = '/tmp/mapnik-sqlite-point.db'
ogr_metadata = True
# create test db
conn = sqlite3.connect(test_db)
cur = conn.cursor()
cur.execute('''
CREATE TABLE IF NOT EXISTS "point_table"
(id INTEGER PRIMARY KEY AUTOINCREMENT, geometry BLOB, "name" varchar)
CREATE TABLE IF NOT EXISTS point_table
(id INTEGER PRIMARY KEY AUTOINCREMENT, geometry BLOB, name varchar)
''')
# optional: but nice if we want to read with ogr
if ogr_metadata:
cur.execute('''CREATE TABLE IF NOT EXISTS geometry_columns (
f_table_name VARCHAR,
f_geometry_column VARCHAR,
geometry_type INTEGER,
coord_dimension INTEGER,
srid INTEGER,
geometry_format VARCHAR )''')
cur.execute('''INSERT INTO geometry_columns
(f_table_name, f_geometry_column, geometry_format,
geometry_type, coord_dimension, srid) VALUES
('point_table','geometry','WKB', 1, 1, 4326)''')
conn.commit()
cur.close()
# add a point as wkb to match how an ogr created db looks
cur = conn.cursor()
wkb = mapnik.Path.from_wkt('POINT(-122 48)').to_wkb(mapnik.wkbByteOrder.XDR)
# add a point as wkb (using mapnik) to match how an ogr created db looks
x = -122 # longitude
y = 48 # latitude
wkt = 'POINT(%s %s)' % (x,y)
# little endian wkb (mapnik will auto-detect and ready either little or big endian (XDR))
wkb = mapnik.Path.from_wkt(wkt).to_wkb(mapnik.wkbByteOrder.NDR)
values = (None,sqlite3.Binary(wkb),"test point")
cur = conn.cursor()
cur.execute('''INSERT into "point_table" (id,geometry,name) values (?,?,?)''',values)
conn.commit()
cur.close()
def make_wkb_point(x,y):
import struct
byteorder = 1; # little endian
endianess = ''
if byteorder == 1:
endianess = '<'
else:
endianess = '>'
geom_type = 1; # for a point
return struct.pack('%sbldd' % endianess, byteorder, geom_type, x, y)
# confirm the wkb matches a manually formed wkb
wkb2 = make_wkb_point(x,y)
eq_(wkb,wkb2)
# ensure we can read this data back out properly with mapnik
ds = mapnik.Datasource(**{'type':'sqlite','file':test_db, 'table':'point_table'})
fs = ds.featureset()
@ -107,18 +140,19 @@ if 'sqlite' in mapnik.DatasourceCache.instance().plugin_names():
cur.execute('''SELECT * from point_table''')
conn.commit()
result = cur.fetchone()
cur.close()
feat_id = result[0]
eq_(feat_id,1)
name = result[2]
eq_(name,'test point')
geom_wkb_blob = result[1]
eq_(str(geom_wkb_blob),geoms.to_wkb(mapnik.wkbByteOrder.XDR))
eq_(str(geom_wkb_blob),geoms.to_wkb(mapnik.wkbByteOrder.NDR))
new_geom = mapnik.Path.from_wkb(str(geom_wkb_blob))
eq_(new_geom.to_wkt(),geoms.to_wkt())
# cleanup
cur.close()
os.unlink(test_db)
os.unlink(test_db + '.index')
if __name__ == "__main__":
setup()