dump1090/tools/fuzzy-30003-matcher.py

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#!/usr/bin/env python3
#
# Regression testing helper: takes a 3.0.5 port-30003 output file
# and a 3.1.0 port-30003 output file and generates a diff, after
# dealing with the known formatting / data differences
import csv
from contextlib import closing
horizon=5
def fuzzy_match_details(l1, l2):
_, _, type1, _, _, addr1, _, _, _, _, _, cs1, alt1, gs1, hdg1, lat1, lon1, vr1, sq1, change1, emerg1, spi1, aog1 = l1
_, _, type2, _, _, addr2, _, _, _, _, _, cs2, alt2, gs2, hdg2, lat2, lon2, vr2, sq2, change2, emerg2, spi2, aog2 = l2
if addr1 != addr2:
return (False, 'adr')
if type1 != type2:
# 3.0.5: reports DF17 surface/airborne with no position as type 7
# 3.1.0: reports DF17 surface/airborne with no position as type 2/3
if type1 != '7':
return (False, 'typ')
if type2 != '2' and type2 != '3':
return (False, 'typ')
if lat1 != '' or lon1 != '':
return (False, 'typ')
if alt1 != alt2:
# 3.0.5: omits altitude in DF17 if no position was decoded
# 3.1.0: includes it
if type1 != '7' or alt1 != '' or alt2 == '':
return (False, 'alt')
if gs1 != gs2:
# 3.0.5: truncates computed GS
# 3.1.0: rounds computed GS
if gs1 == '' or gs2 == '' or abs(int(gs1) - int(gs2)) > 1:
return (False, 'gs ')
if hdg1 != hdg2:
# 3.0.5: truncates computed heading
# 3.1.0: rounds computed heading
if hdg1 == '' or hdg2 == '':
return (False, 'hdg')
delta = abs(int(hdg1) - int(hdg2))
if delta > 180:
delta = 360 - delta
if delta > 1:
return False
if lat1 != lat2:
return (False, 'lat')
if lon1 != lon2:
return (False, 'lon')
if vr1 != vr2:
return (False, 'vr ')
if sq1 != sq2:
# 3.0.5: strips leading zeros
# 3.1.0: preserves leading zeros
if ('0' + sq1) != sq2 and ('00' + sq1) != sq2 and ('000' + sq1) != sq2:
return (False, 'sqk')
# 3.1.0: only reports these when available
if change1 != change2:
if change1 != '0' or change2 != '':
return (False, 'chg')
if emerg1 != emerg2:
if emerg1 != '0' or emerg2 != '':
return (False, 'emg')
if spi1 != spi2:
if spi1 != '0' or spi2 != '':
return (False, 'spi')
if aog1 != aog2:
# 3.1.0: different rules for when AOG is reported
if aog1 != '' and aog2 != '':
return (False, 'aog')
return (True, None)
def fuzzy_match(l1, l2):
return fuzzy_match_details(l1, l2)[0]
def fuzzy_match_reason(l1, l2):
return fuzzy_match_details(l1, l2)[1]
def next_line(reader, queue):
if queue:
return queue.pop()
line = next(reader, None)
if line is None or len(line) == 0:
return None
else:
return [reader.line_num] + line
def unpush_line(queue, line):
queue.insert(0, line)
def csv_diff(path1, path2):
diffs = []
q1 = []
q2 = []
with closing(open(path1, 'r')) as f1, closing(open(path2, 'r')) as f2:
r1 = csv.reader(f1)
r2 = csv.reader(f2)
l1 = next_line(r1, q1)
l2 = next_line(r2, q2)
while (l1 is not None) or (l2 is not None):
if l1 is None:
yield ('+', None, l2)
l2 = next_line(r2, q2)
continue
if l2 is None:
yield ('-', l1, None)
l1 = next_line(r1, q1)
continue
if fuzzy_match(l1, l2):
yield (' ', l1, l2)
l1 = next_line(r1, q1)
l2 = next_line(r2, q2)
continue
#print('mismatch:', l1, l2)
save_1 = []
save_2 = []
found = False
for i in range(horizon):
next_l2 = next_line(r2, q2)
if next_l2 is not None:
if fuzzy_match(l1, next_l2):
# skip l2 and any lines in save_2
# continue with l1 and next_l2
yield('+', None, l2)
for l in save_2:
yield('+', None, l)
l2 = next_l2
q1.extend(reversed(save_1))
found = True
break
else:
save_2.append(next_l2)
next_l1 = next_line(r1, q1)
if next_l1 is not None:
if fuzzy_match(next_l1, l2):
# skip l1 and any lines in save_1
# continue with next_l1 and l2
yield('-', l1, None)
for l in save_1:
yield('-', l, None)
l1 = next_l1
q2.extend(reversed(save_2))
found = True
break
else:
save_1.append(next_l1)
if found:
#print('new l1:', l1)
#print('new l2:', l2)
#print('new q1:')
#for q in q1: print(q)
#print('new q2:')
#for q in q2: print(q)
continue
#print('lookahead: nothing likely')
q1.extend(reversed(save_1))
q2.extend(reversed(save_2))
yield ('*', l1, l2)
l1 = next_line(r1, q1)
l2 = next_line(r1, q2)
def format_line(line):
line_num = line[0]
subrow = line[1:3] + line[5:6] + line[11:]
return str(line_num) + ': ' + ','.join(subrow)
if __name__ == '__main__':
import sys
for action, old, new in csv_diff(sys.argv[1], sys.argv[2]):
if action == ' ':
if False: print (' ' + format_line(new))
elif action == '*':
reason = fuzzy_match_reason(old, new)
print ('< ' + reason + ' ' + format_line(old))
print ('> ' + reason + ' ' + format_line(new))
elif action == '-':
# 3.0.5: emits lines for all-zero messages
# 3.1.0: doesn't
if old[5] != '000000':
print ('- ' + format_line(old))
elif action == '+':
print ('+ ' + format_line(new))