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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Utility script to retrieve duration information from behave JSON output.
REQUIRES: Python >= 2.6 (json module is part of Python standard library)
LICENSE: BSD
"""
from __future__ import absolute_import
__author__ = "Jens Engel"
__copyright__ = "(c) 2013 by Jens Engel"
__license__ = "BSD"
VERSION = "0.1.0"
# -- IMPORTS:
from behave import json_parser
from behave.model import ScenarioOutline
from optparse import OptionParser
from operator import attrgetter
import os.path
import sys
# ----------------------------------------------------------------------------
# FUNCTIONS:
# ----------------------------------------------------------------------------
class StepDurationData(object):
def __init__(self, step=None):
self.step_name = None
self.min_duration = sys.maxint
self.max_duration = 0
self.durations = []
self.step = step
if step:
self.process_step(step)
@staticmethod
def make_step_name(step):
step_name = "%s %s" % (step.step_type.capitalize(), step.name)
return step_name
def process_step(self, step):
step_name = self.make_step_name(step)
if not self.step_name:
self.step_name = step_name
if self.min_duration > step.duration:
self.min_duration = step.duration
if self.max_duration < step.duration:
self.max_duration = step.duration
self.durations.append(step.duration)
class BehaveDurationData(object):
def __init__(self):
self.step_registry = {}
self.all_steps = []
self.all_scenarios = []
def process_features(self, features):
for feature in features:
self.process_feature(feature)
def process_feature(self, feature):
if feature.background:
self.process_background(feature.background)
for scenario in feature.scenarios:
if isinstance(scenario, ScenarioOutline):
self.process_scenario_outline(scenario)
else:
self.process_scenario(scenario)
def process_step(self, step):
step_name = StepDurationData.make_step_name(step)
known_step = self.step_registry.get(step_name, None)
if known_step:
known_step.process_step(step)
else:
step_data = StepDurationData(step)
self.step_registry[step_name] = step_data
self.all_steps.append(step)
def process_background(self, scenario):
for step in scenario:
self.process_step(step)
def process_scenario(self, scenario):
for step in scenario:
self.process_step(step)
def process_scenario_outline(self, scenario_outline):
for scenario in scenario_outline:
self.process_scenario(scenario)
def report_step_durations(self, limit=None, min_duration=None, ostream=sys.stdout):
step_datas = list(self.step_registry.values())
steps_size = len(step_datas)
steps_by_longest_duration_first = sorted(step_datas,
key=attrgetter("max_duration"),
reverse=True)
ostream.write("STEP DURATIONS (longest first, size=%d):\n" % steps_size)
ostream.write("-" * 80)
ostream.write("\n")
for index, step in enumerate(steps_by_longest_duration_first):
ostream.write("% 4d. %9.6fs %s" % \
(index+1, step.max_duration, step.step_name))
calls = len(step.durations)
if calls > 1:
ostream.write(" (%d calls, min: %.6fs)\n" % (calls, step.min_duration))
else:
ostream.write("\n")
if ((limit and index+1 >= limit) or
(step.max_duration < min_duration)):
remaining = steps_size - (index+1)
ostream.write("...\nSkip remaining %d steps.\n" % remaining)
break
# ----------------------------------------------------------------------------
# MAIN FUNCTION:
# ----------------------------------------------------------------------------
def main(args=None):
if args is None:
args = sys.argv[1:]
usage_ = """%prog [OPTIONS] JsonFile
Read behave JSON data file and extract steps with longest duration."""
parser = OptionParser(usage=usage_, version=VERSION)
parser.add_option("-e", "--encoding", dest="encoding",
default="UTF-8",
help="Encoding to use (default: %default).")
parser.add_option("-l", "--limit", dest="limit", type="int",
help="Max. number of steps (default: %default).")
parser.add_option("-m", "--min", dest="min_duration", default="0",
help="Min. duration threshold (default: %default).")
options, filenames = parser.parse_args(args)
if not filenames:
parser.error("OOPS, no filenames provided.")
elif len(filenames) > 1:
parser.error("OOPS: Can only process one JSON file.")
min_duration = float(options.min_duration)
if min_duration < 0:
min_duration = None
json_filename = filenames[0]
if not os.path.exists(json_filename):
parser.error("JSON file '%s' not found" % json_filename)
# -- NORMAL PROCESSING: Read JSON, extract step durations and report them.
features = json_parser.parse(json_filename)
processor = BehaveDurationData()
processor.process_features(features)
processor.report_step_durations(options.limit, min_duration)
sys.stdout.write("Detected %d features.\n" % len(features))
return 0
# ----------------------------------------------------------------------------
# AUTO-MAIN:
# ----------------------------------------------------------------------------
if __name__ == "__main__":
sys.exit(main())
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