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#!/usr/bin/env python
"""Tests for ais.compatibility.gpsd."""
import ais
import ais.compatibility.gpsd
import ais.stream
import unittest
import json
import os
import re
import subprocess
import six
from .. import testutils
known_problems = {
2: set(('turn', 'status_text')),
9: set(['speed']),
15: set(['mmsi2']),
17: set(('lat', 'lon')),
20: set((
'increment3', 'number3', 'offset3', 'timeout3',
'increment4', 'number4', 'offset4', 'timeout4',
)),
27: set(['status']),
}
class SingleMessageTestsTest(unittest.TestCase):
def setUp(self):
self.mangle = ais.compatibility.gpsd.Mangler()
def assertDictContainsSubset2(self, actual, expected):
# assertDictContainsSubset was deprecated because of incorrect arg order.
# This method has the correct order.
self.assertIsInstance(expected, dict)
self.assertIsInstance(actual, dict)
for key, value in expected.items():
self.assertEqual(actual[key], value, 'kv: %s, %s' % (key, value))
def testMsg1(self):
fields = '!AIVDM,1,1,,B,169A91O005KbT4gUoUl9d;5j0D0U,0*2D'.split(',')
decoded = ais.decode(fields[5], int(fields[6][0]))
mangled = self.mangle(decoded)
expected = {
'type': 1,
'repeat': 0,
'mmsi': 412371205,
'status': 15,
'status_text': 'Not defined',
'turn': 0,
'speed': 0.5,
'accuracy': False,
'course': 248.0,
'heading': 354,
'second': 57,
'maneuver': 0,
'raim': False}
self.assertDictContainsSubset2(mangled, expected)
# Float values will not match, so just test existence.
for field in ('lat', 'lon'):
self.assertIn(field, mangled)
def testMsg5LargeTypeAndCargo(self):
# Test based on this AIS message:
# ais.decode(r'568rWSP000009@9D000hT4r0L4pN3;D000000<o<000004000'
# r'0000000000000000000000',2)
msg = {
'id': 5,
'type_and_cargo': 204}
mangled = self.mangle(msg)
expected = {
'shiptype': 204,
'shiptype_text': '204 - Unknown',
'type': 5}
self.assertDictContainsSubset2(mangled, expected)
def testTimestamps(self):
msg = {
'id': 1,
'tagblock_timestamp': 1431682043,
'year': 2015,
'month': 5,
'day': 15,
'hour': 9,
'minute': 27,
'second': 23,
}
mangled = self.mangle(msg)
expected = {
'type': 1,
'timestamp': '2015-05-15T09:27:23Z',
'tagblock_timestamp': '2015-05-15T09:27:23.000000Z'
}
self.assertDictContainsSubset2(mangled, expected)
class StreamingTest(unittest.TestCase):
def setUp(self):
self.dir = os.path.split(__file__)[0]
def validate_file(self, base):
nmea_name = os.path.join(self.dir, base + '.nmea')
json_name = os.path.join(self.dir, base + '.json')
def Json():
with open(json_name) as f:
for msg in f:
yield json.loads(msg)
def Libais():
with open(nmea_name) as f:
for msg in ais.stream.decode(f):
yield ais.compatibility.gpsd.mangle(msg)
g = iter(Json())
a = iter(Libais())
try:
while True:
gmsg = six.advance_iterator(g)
amsg = six.advance_iterator(a)
while amsg['type'] != gmsg['type']:
amsg = six.advance_iterator(a)
if gmsg['type'] in known_problems:
for key in known_problems[gmsg['type']]:
if key in gmsg: del gmsg[key]
if key in amsg: del amsg[key]
diff = testutils.DictDiff(gmsg, amsg)
self.assertFalse(diff['changed'])
self.assertFalse(
diff['removed'],
'Removed not empty: %s\n %s\n %s' % (
diff['removed'],
amsg,
gmsg))
except StopIteration:
pass
def testTypeExamples(self):
self.validate_file("../data/typeexamples")
def testTagblock(self):
self.validate_file("../data/tagblock")
def HaveGpsdecode():
"""Return true if the gpsdecode binary is on the path or false if not."""
try:
subprocess.check_call(['gpsdecode', '-V'])
return True
except OSError:
return False
class TestActualGPSDCompatibility(unittest.TestCase):
def setUp(self):
self.dir = os.path.split(__file__)[0]
def validate_file(self, base):
nmea_name = os.path.join(self.dir, base + '.nmea')
json_name = os.path.join(self.dir, base + '.gpsdecode.json')
subprocess.check_call('gpsdecode < %s > %s' % (nmea_name, json_name),
shell=True)
try:
def Gpsd():
with open(json_name) as f:
for msg in f:
yield json.loads(msg)
def Libais():
with open(nmea_name) as f:
for msg in ais.stream.decode(f):
yield ais.compatibility.gpsd.mangle(msg)
g = iter(Gpsd())
a = iter(Libais())
try:
while True:
gmsg = six.advance_iterator(g)
amsg = six.advance_iterator(a)
while amsg['type'] != gmsg['type']:
amsg = six.advance_iterator(a)
if gmsg['type'] in known_problems:
for key in known_problems[gmsg['type']]:
if key in gmsg: del gmsg[key]
if key in amsg: del amsg[key]
diff = testutils.DictDiff(gmsg, amsg)
self.assertFalse(diff['changed'])
self.assertFalse(
diff['removed'],
'Removed not empty: %s\n %s\n %s' % (
diff['removed'],
amsg,
gmsg))
except StopIteration:
pass
finally:
os.unlink(json_name)
@unittest.skipIf(not HaveGpsdecode(), 'gpsdecode not in the path')
def testTypeExamples(self):
self.validate_file("../data/typeexamples")
@unittest.skipIf(not HaveGpsdecode(), 'gpsdecode not in the path')
def testTagblock(self):
self.validate_file("../data/tagblock")
if __name__ == '__main__':
unittest.main()
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