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tests: JSON comparison command for LabN topotests

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The changes add the "jsoncmp_pass" and the "jsoncmp_fail" commands to
compare VTY shell's JSON output to an expected JSON object during
topotests using the LabN testing framework. This helps to eliminate
false negative test results (i.e. due to routes beeing out of order
after convergence or cosmetic changes in VTY shell's text output).

Signed-off-by: David Schweizer <dschweizer@opensourcerouting.org>
This commit is contained in:
David Schweizer 2021-02-22 10:31:57 +01:00
parent 2031dbf31c
commit 4e3828b771
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GPG Key ID: A07D97BEEE79EF7F
1 changed files with 32 additions and 0 deletions
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32
tests/topotests/lib/lutil.py
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@ -25,6 +25,7 @@ import json
import math
import time
from lib.topolog import logger
from lib.topotest import json_cmp
from mininet.net import Mininet
@ -194,6 +195,10 @@ Total %-4d %-4d %d\n\
global net
if op != "wait":
self.l_line += 1
if op == "jsoncmp_pass" or op == "jsoncmp_fail":
returnJson = True
self.log(
"%s (#%d) %s:%s COMMAND:%s:%s:%s:%s:%s:"
% (
@ -227,6 +232,33 @@ Total %-4d %-4d %d\n\
)
self.log("COMMAND OUTPUT:%s:" % report)
# JSON comparison
if op == "jsoncmp_pass" or op == "jsoncmp_fail":
try:
expect = json.loads(regexp)
except:
expect = None
self.log(
"WARNING: JSON load failed -- confirm regex input is in JSON format."
)
json_diff = json_cmp(js, expect)
if json_diff != None:
if op == "jsoncmp_fail":
success = True
else:
success = False
self.log("JSON DIFF:%s:" % json_diff)
ret = success
else:
if op == "jsoncmp_fail":
success = False
else:
success = True
self.result(target, success, result)
if js != None:
return js
return ret
# Experiment: can we achieve the same match behavior via DOTALL
# without converting newlines to spaces?
out_nl = out