664 lines
21 KiB
Python
664 lines
21 KiB
Python
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#!/usr/bin/env python3
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# SPDX-License-Identifier: GPL-2.0
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"""
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tdc.py - Linux tc (Traffic Control) unit test driver
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Copyright (C) 2017 Lucas Bates <lucasb@mojatatu.com>
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"""
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import re
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import os
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import sys
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import argparse
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import importlib
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import json
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import subprocess
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import time
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import traceback
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from collections import OrderedDict
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from string import Template
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from tdc_config import *
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from tdc_helper import *
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import TdcPlugin
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class PluginMgrTestFail(Exception):
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def __init__(self, stage, output, message):
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self.stage = stage
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self.output = output
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self.message = message
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class PluginMgr:
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def __init__(self, argparser):
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super().__init__()
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self.plugins = {}
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self.plugin_instances = []
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self.args = []
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self.argparser = argparser
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# TODO, put plugins in order
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plugindir = os.getenv('TDC_PLUGIN_DIR', './plugins')
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for dirpath, dirnames, filenames in os.walk(plugindir):
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for fn in filenames:
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if (fn.endswith('.py') and
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not fn == '__init__.py' and
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not fn.startswith('#') and
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not fn.startswith('.#')):
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mn = fn[0:-3]
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foo = importlib.import_module('plugins.' + mn)
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self.plugins[mn] = foo
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self.plugin_instances.append(foo.SubPlugin())
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def call_pre_suite(self, testcount, testidlist):
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for pgn_inst in self.plugin_instances:
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pgn_inst.pre_suite(testcount, testidlist)
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def call_post_suite(self, index):
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for pgn_inst in reversed(self.plugin_instances):
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pgn_inst.post_suite(index)
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def call_pre_case(self, test_ordinal, testid):
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for pgn_inst in self.plugin_instances:
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try:
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pgn_inst.pre_case(test_ordinal, testid)
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except Exception as ee:
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print('exception {} in call to pre_case for {} plugin'.
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format(ee, pgn_inst.__class__))
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print('test_ordinal is {}'.format(test_ordinal))
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print('testid is {}'.format(testid))
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raise
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def call_post_case(self):
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for pgn_inst in reversed(self.plugin_instances):
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pgn_inst.post_case()
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def call_pre_execute(self):
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for pgn_inst in self.plugin_instances:
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pgn_inst.pre_execute()
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def call_post_execute(self):
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for pgn_inst in reversed(self.plugin_instances):
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pgn_inst.post_execute()
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def call_add_args(self, parser):
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for pgn_inst in self.plugin_instances:
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parser = pgn_inst.add_args(parser)
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return parser
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def call_check_args(self, args, remaining):
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for pgn_inst in self.plugin_instances:
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pgn_inst.check_args(args, remaining)
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def call_adjust_command(self, stage, command):
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for pgn_inst in self.plugin_instances:
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command = pgn_inst.adjust_command(stage, command)
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return command
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@staticmethod
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def _make_argparser(args):
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self.argparser = argparse.ArgumentParser(
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description='Linux TC unit tests')
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def replace_keywords(cmd):
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"""
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For a given executable command, substitute any known
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variables contained within NAMES with the correct values
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"""
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tcmd = Template(cmd)
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subcmd = tcmd.safe_substitute(NAMES)
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return subcmd
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def exec_cmd(args, pm, stage, command):
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"""
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Perform any required modifications on an executable command, then run
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it in a subprocess and return the results.
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"""
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if len(command.strip()) == 0:
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return None, None
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if '$' in command:
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command = replace_keywords(command)
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command = pm.call_adjust_command(stage, command)
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if args.verbose > 0:
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print('command "{}"'.format(command))
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proc = subprocess.Popen(command,
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shell=True,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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env=ENVIR)
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(rawout, serr) = proc.communicate()
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if proc.returncode != 0 and len(serr) > 0:
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foutput = serr.decode("utf-8", errors="ignore")
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else:
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foutput = rawout.decode("utf-8", errors="ignore")
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proc.stdout.close()
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proc.stderr.close()
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return proc, foutput
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def prepare_env(args, pm, stage, prefix, cmdlist, output = None):
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"""
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Execute the setup/teardown commands for a test case.
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Optionally terminate test execution if the command fails.
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"""
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if args.verbose > 0:
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print('{}'.format(prefix))
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for cmdinfo in cmdlist:
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if isinstance(cmdinfo, list):
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exit_codes = cmdinfo[1:]
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cmd = cmdinfo[0]
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else:
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exit_codes = [0]
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cmd = cmdinfo
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if not cmd:
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continue
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(proc, foutput) = exec_cmd(args, pm, stage, cmd)
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if proc and (proc.returncode not in exit_codes):
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print('', file=sys.stderr)
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print("{} *** Could not execute: \"{}\"".format(prefix, cmd),
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file=sys.stderr)
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print("\n{} *** Error message: \"{}\"".format(prefix, foutput),
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file=sys.stderr)
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print("returncode {}; expected {}".format(proc.returncode,
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exit_codes))
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print("\n{} *** Aborting test run.".format(prefix), file=sys.stderr)
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print("\n\n{} *** stdout ***".format(proc.stdout), file=sys.stderr)
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print("\n\n{} *** stderr ***".format(proc.stderr), file=sys.stderr)
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raise PluginMgrTestFail(
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stage, output,
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'"{}" did not complete successfully'.format(prefix))
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def run_one_test(pm, args, index, tidx):
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global NAMES
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result = True
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tresult = ""
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tap = ""
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if args.verbose > 0:
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print("\t====================\n=====> ", end="")
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print("Test " + tidx["id"] + ": " + tidx["name"])
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# populate NAMES with TESTID for this test
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NAMES['TESTID'] = tidx['id']
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pm.call_pre_case(index, tidx['id'])
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prepare_env(args, pm, 'setup', "-----> prepare stage", tidx["setup"])
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if (args.verbose > 0):
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print('-----> execute stage')
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pm.call_pre_execute()
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(p, procout) = exec_cmd(args, pm, 'execute', tidx["cmdUnderTest"])
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if p:
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exit_code = p.returncode
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else:
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exit_code = None
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pm.call_post_execute()
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if (exit_code is None or exit_code != int(tidx["expExitCode"])):
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result = False
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print("exit: {!r}".format(exit_code))
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print("exit: {}".format(int(tidx["expExitCode"])))
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#print("exit: {!r} {}".format(exit_code, int(tidx["expExitCode"])))
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print(procout)
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else:
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if args.verbose > 0:
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print('-----> verify stage')
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match_pattern = re.compile(
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str(tidx["matchPattern"]), re.DOTALL | re.MULTILINE)
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(p, procout) = exec_cmd(args, pm, 'verify', tidx["verifyCmd"])
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if procout:
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match_index = re.findall(match_pattern, procout)
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if len(match_index) != int(tidx["matchCount"]):
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result = False
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elif int(tidx["matchCount"]) != 0:
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result = False
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if not result:
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tresult += 'not '
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tresult += 'ok {} - {} # {}\n'.format(str(index), tidx['id'], tidx['name'])
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tap += tresult
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if result == False:
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if procout:
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tap += procout
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else:
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tap += 'No output!\n'
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prepare_env(args, pm, 'teardown', '-----> teardown stage', tidx['teardown'], procout)
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pm.call_post_case()
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index += 1
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# remove TESTID from NAMES
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del(NAMES['TESTID'])
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return tap
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def test_runner(pm, args, filtered_tests):
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"""
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Driver function for the unit tests.
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Prints information about the tests being run, executes the setup and
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teardown commands and the command under test itself. Also determines
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success/failure based on the information in the test case and generates
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TAP output accordingly.
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"""
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testlist = filtered_tests
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tcount = len(testlist)
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index = 1
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tap = ''
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badtest = None
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stage = None
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emergency_exit = False
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emergency_exit_message = ''
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if args.notap:
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if args.verbose:
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tap = 'notap requested: omitting test plan\n'
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else:
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tap = str(index) + ".." + str(tcount) + "\n"
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try:
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pm.call_pre_suite(tcount, [tidx['id'] for tidx in testlist])
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except Exception as ee:
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ex_type, ex, ex_tb = sys.exc_info()
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print('Exception {} {} (caught in pre_suite).'.
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format(ex_type, ex))
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# when the extra print statements are uncommented,
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# the traceback does not appear between them
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# (it appears way earlier in the tdc.py output)
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# so don't bother ...
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# print('--------------------(')
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# print('traceback')
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traceback.print_tb(ex_tb)
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# print('--------------------)')
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emergency_exit_message = 'EMERGENCY EXIT, call_pre_suite failed with exception {} {}\n'.format(ex_type, ex)
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emergency_exit = True
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stage = 'pre-SUITE'
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if emergency_exit:
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pm.call_post_suite(index)
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return emergency_exit_message
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if args.verbose > 1:
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print('give test rig 2 seconds to stabilize')
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time.sleep(2)
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for tidx in testlist:
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if "flower" in tidx["category"] and args.device == None:
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if args.verbose > 1:
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print('Not executing test {} {} because DEV2 not defined'.
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format(tidx['id'], tidx['name']))
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continue
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try:
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badtest = tidx # in case it goes bad
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tap += run_one_test(pm, args, index, tidx)
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except PluginMgrTestFail as pmtf:
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ex_type, ex, ex_tb = sys.exc_info()
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stage = pmtf.stage
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message = pmtf.message
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output = pmtf.output
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print(message)
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print('Exception {} {} (caught in test_runner, running test {} {} {} stage {})'.
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format(ex_type, ex, index, tidx['id'], tidx['name'], stage))
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print('---------------')
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print('traceback')
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traceback.print_tb(ex_tb)
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print('---------------')
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if stage == 'teardown':
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print('accumulated output for this test:')
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if pmtf.output:
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print(pmtf.output)
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print('---------------')
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break
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index += 1
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# if we failed in setup or teardown,
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# fill in the remaining tests with ok-skipped
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count = index
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if not args.notap:
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tap += 'about to flush the tap output if tests need to be skipped\n'
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if tcount + 1 != index:
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for tidx in testlist[index - 1:]:
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msg = 'skipped - previous {} failed'.format(stage)
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tap += 'ok {} - {} # {} {} {}\n'.format(
|
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count, tidx['id'], msg, index, badtest.get('id', '--Unknown--'))
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count += 1
|
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tap += 'done flushing skipped test tap output\n'
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if args.pause:
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print('Want to pause\nPress enter to continue ...')
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if input(sys.stdin):
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print('got something on stdin')
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pm.call_post_suite(index)
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return tap
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def has_blank_ids(idlist):
|
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"""
|
||
|
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Search the list for empty ID fields and return true/false accordingly.
|
||
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"""
|
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return not(all(k for k in idlist))
|
||
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|
||
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|
||
|
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def load_from_file(filename):
|
||
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"""
|
||
|
|
Open the JSON file containing the test cases and return them
|
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as list of ordered dictionary objects.
|
||
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"""
|
||
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try:
|
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with open(filename) as test_data:
|
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testlist = json.load(test_data, object_pairs_hook=OrderedDict)
|
||
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except json.JSONDecodeError as jde:
|
||
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print('IGNORING test case file {}\n\tBECAUSE: {}'.format(filename, jde))
|
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testlist = list()
|
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else:
|
||
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idlist = get_id_list(testlist)
|
||
|
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if (has_blank_ids(idlist)):
|
||
|
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for k in testlist:
|
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k['filename'] = filename
|
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return testlist
|
||
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|
||
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|
||
|
|
def args_parse():
|
||
|
|
"""
|
||
|
|
Create the argument parser.
|
||
|
|
"""
|
||
|
|
parser = argparse.ArgumentParser(description='Linux TC unit tests')
|
||
|
|
return parser
|
||
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|
||
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|
||
|
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def set_args(parser):
|
||
|
|
"""
|
||
|
|
Set the command line arguments for tdc.
|
||
|
|
"""
|
||
|
|
parser.add_argument(
|
||
|
|
'-p', '--path', type=str,
|
||
|
|
help='The full path to the tc executable to use')
|
||
|
|
sg = parser.add_argument_group(
|
||
|
|
'selection', 'select which test cases: ' +
|
||
|
|
'files plus directories; filtered by categories plus testids')
|
||
|
|
ag = parser.add_argument_group(
|
||
|
|
'action', 'select action to perform on selected test cases')
|
||
|
|
|
||
|
|
sg.add_argument(
|
||
|
|
'-D', '--directory', nargs='+', metavar='DIR',
|
||
|
|
help='Collect tests from the specified directory(ies) ' +
|
||
|
|
'(default [tc-tests])')
|
||
|
|
sg.add_argument(
|
||
|
|
'-f', '--file', nargs='+', metavar='FILE',
|
||
|
|
help='Run tests from the specified file(s)')
|
||
|
|
sg.add_argument(
|
||
|
|
'-c', '--category', nargs='*', metavar='CATG', default=['+c'],
|
||
|
|
help='Run tests only from the specified category/ies, ' +
|
||
|
|
'or if no category/ies is/are specified, list known categories.')
|
||
|
|
sg.add_argument(
|
||
|
|
'-e', '--execute', nargs='+', metavar='ID',
|
||
|
|
help='Execute the specified test cases with specified IDs')
|
||
|
|
ag.add_argument(
|
||
|
|
'-l', '--list', action='store_true',
|
||
|
|
help='List all test cases, or those only within the specified category')
|
||
|
|
ag.add_argument(
|
||
|
|
'-s', '--show', action='store_true', dest='showID',
|
||
|
|
help='Display the selected test cases')
|
||
|
|
ag.add_argument(
|
||
|
|
'-i', '--id', action='store_true', dest='gen_id',
|
||
|
|
help='Generate ID numbers for new test cases')
|
||
|
|
parser.add_argument(
|
||
|
|
'-v', '--verbose', action='count', default=0,
|
||
|
|
help='Show the commands that are being run')
|
||
|
|
parser.add_argument(
|
||
|
|
'-N', '--notap', action='store_true',
|
||
|
|
help='Suppress tap results for command under test')
|
||
|
|
parser.add_argument('-d', '--device',
|
||
|
|
help='Execute the test case in flower category')
|
||
|
|
parser.add_argument(
|
||
|
|
'-P', '--pause', action='store_true',
|
||
|
|
help='Pause execution just before post-suite stage')
|
||
|
|
return parser
|
||
|
|
|
||
|
|
|
||
|
|
def check_default_settings(args, remaining, pm):
|
||
|
|
"""
|
||
|
|
Process any arguments overriding the default settings,
|
||
|
|
and ensure the settings are correct.
|
||
|
|
"""
|
||
|
|
# Allow for overriding specific settings
|
||
|
|
global NAMES
|
||
|
|
|
||
|
|
if args.path != None:
|
||
|
|
NAMES['TC'] = args.path
|
||
|
|
if args.device != None:
|
||
|
|
NAMES['DEV2'] = args.device
|
||
|
|
if not os.path.isfile(NAMES['TC']):
|
||
|
|
print("The specified tc path " + NAMES['TC'] + " does not exist.")
|
||
|
|
exit(1)
|
||
|
|
|
||
|
|
pm.call_check_args(args, remaining)
|
||
|
|
|
||
|
|
|
||
|
|
def get_id_list(alltests):
|
||
|
|
"""
|
||
|
|
Generate a list of all IDs in the test cases.
|
||
|
|
"""
|
||
|
|
return [x["id"] for x in alltests]
|
||
|
|
|
||
|
|
|
||
|
|
def check_case_id(alltests):
|
||
|
|
"""
|
||
|
|
Check for duplicate test case IDs.
|
||
|
|
"""
|
||
|
|
idl = get_id_list(alltests)
|
||
|
|
return [x for x in idl if idl.count(x) > 1]
|
||
|
|
|
||
|
|
|
||
|
|
def does_id_exist(alltests, newid):
|
||
|
|
"""
|
||
|
|
Check if a given ID already exists in the list of test cases.
|
||
|
|
"""
|
||
|
|
idl = get_id_list(alltests)
|
||
|
|
return (any(newid == x for x in idl))
|
||
|
|
|
||
|
|
|
||
|
|
def generate_case_ids(alltests):
|
||
|
|
"""
|
||
|
|
If a test case has a blank ID field, generate a random hex ID for it
|
||
|
|
and then write the test cases back to disk.
|
||
|
|
"""
|
||
|
|
import random
|
||
|
|
for c in alltests:
|
||
|
|
if (c["id"] == ""):
|
||
|
|
while True:
|
||
|
|
newid = str('{:04x}'.format(random.randrange(16**4)))
|
||
|
|
if (does_id_exist(alltests, newid)):
|
||
|
|
continue
|
||
|
|
else:
|
||
|
|
c['id'] = newid
|
||
|
|
break
|
||
|
|
|
||
|
|
ufilename = []
|
||
|
|
for c in alltests:
|
||
|
|
if ('filename' in c):
|
||
|
|
ufilename.append(c['filename'])
|
||
|
|
ufilename = get_unique_item(ufilename)
|
||
|
|
for f in ufilename:
|
||
|
|
testlist = []
|
||
|
|
for t in alltests:
|
||
|
|
if 'filename' in t:
|
||
|
|
if t['filename'] == f:
|
||
|
|
del t['filename']
|
||
|
|
testlist.append(t)
|
||
|
|
outfile = open(f, "w")
|
||
|
|
json.dump(testlist, outfile, indent=4)
|
||
|
|
outfile.write("\n")
|
||
|
|
outfile.close()
|
||
|
|
|
||
|
|
def filter_tests_by_id(args, testlist):
|
||
|
|
'''
|
||
|
|
Remove tests from testlist that are not in the named id list.
|
||
|
|
If id list is empty, return empty list.
|
||
|
|
'''
|
||
|
|
newlist = list()
|
||
|
|
if testlist and args.execute:
|
||
|
|
target_ids = args.execute
|
||
|
|
|
||
|
|
if isinstance(target_ids, list) and (len(target_ids) > 0):
|
||
|
|
newlist = list(filter(lambda x: x['id'] in target_ids, testlist))
|
||
|
|
return newlist
|
||
|
|
|
||
|
|
def filter_tests_by_category(args, testlist):
|
||
|
|
'''
|
||
|
|
Remove tests from testlist that are not in a named category.
|
||
|
|
'''
|
||
|
|
answer = list()
|
||
|
|
if args.category and testlist:
|
||
|
|
test_ids = list()
|
||
|
|
for catg in set(args.category):
|
||
|
|
if catg == '+c':
|
||
|
|
continue
|
||
|
|
print('considering category {}'.format(catg))
|
||
|
|
for tc in testlist:
|
||
|
|
if catg in tc['category'] and tc['id'] not in test_ids:
|
||
|
|
answer.append(tc)
|
||
|
|
test_ids.append(tc['id'])
|
||
|
|
|
||
|
|
return answer
|
||
|
|
|
||
|
|
def get_test_cases(args):
|
||
|
|
"""
|
||
|
|
If a test case file is specified, retrieve tests from that file.
|
||
|
|
Otherwise, glob for all json files in subdirectories and load from
|
||
|
|
each one.
|
||
|
|
Also, if requested, filter by category, and add tests matching
|
||
|
|
certain ids.
|
||
|
|
"""
|
||
|
|
import fnmatch
|
||
|
|
|
||
|
|
flist = []
|
||
|
|
testdirs = ['tc-tests']
|
||
|
|
|
||
|
|
if args.file:
|
||
|
|
# at least one file was specified - remove the default directory
|
||
|
|
testdirs = []
|
||
|
|
|
||
|
|
for ff in args.file:
|
||
|
|
if not os.path.isfile(ff):
|
||
|
|
print("IGNORING file " + ff + "\n\tBECAUSE does not exist.")
|
||
|
|
else:
|
||
|
|
flist.append(os.path.abspath(ff))
|
||
|
|
|
||
|
|
if args.directory:
|
||
|
|
testdirs = args.directory
|
||
|
|
|
||
|
|
for testdir in testdirs:
|
||
|
|
for root, dirnames, filenames in os.walk(testdir):
|
||
|
|
for filename in fnmatch.filter(filenames, '*.json'):
|
||
|
|
candidate = os.path.abspath(os.path.join(root, filename))
|
||
|
|
if candidate not in testdirs:
|
||
|
|
flist.append(candidate)
|
||
|
|
|
||
|
|
alltestcases = list()
|
||
|
|
for casefile in flist:
|
||
|
|
alltestcases = alltestcases + (load_from_file(casefile))
|
||
|
|
|
||
|
|
allcatlist = get_test_categories(alltestcases)
|
||
|
|
allidlist = get_id_list(alltestcases)
|
||
|
|
|
||
|
|
testcases_by_cats = get_categorized_testlist(alltestcases, allcatlist)
|
||
|
|
idtestcases = filter_tests_by_id(args, alltestcases)
|
||
|
|
cattestcases = filter_tests_by_category(args, alltestcases)
|
||
|
|
|
||
|
|
cat_ids = [x['id'] for x in cattestcases]
|
||
|
|
if args.execute:
|
||
|
|
if args.category:
|
||
|
|
alltestcases = cattestcases + [x for x in idtestcases if x['id'] not in cat_ids]
|
||
|
|
else:
|
||
|
|
alltestcases = idtestcases
|
||
|
|
else:
|
||
|
|
if cat_ids:
|
||
|
|
alltestcases = cattestcases
|
||
|
|
else:
|
||
|
|
# just accept the existing value of alltestcases,
|
||
|
|
# which has been filtered by file/directory
|
||
|
|
pass
|
||
|
|
|
||
|
|
return allcatlist, allidlist, testcases_by_cats, alltestcases
|
||
|
|
|
||
|
|
|
||
|
|
def set_operation_mode(pm, args):
|
||
|
|
"""
|
||
|
|
Load the test case data and process remaining arguments to determine
|
||
|
|
what the script should do for this run, and call the appropriate
|
||
|
|
function.
|
||
|
|
"""
|
||
|
|
ucat, idlist, testcases, alltests = get_test_cases(args)
|
||
|
|
|
||
|
|
if args.gen_id:
|
||
|
|
if (has_blank_ids(idlist)):
|
||
|
|
alltests = generate_case_ids(alltests)
|
||
|
|
else:
|
||
|
|
print("No empty ID fields found in test files.")
|
||
|
|
exit(0)
|
||
|
|
|
||
|
|
duplicate_ids = check_case_id(alltests)
|
||
|
|
if (len(duplicate_ids) > 0):
|
||
|
|
print("The following test case IDs are not unique:")
|
||
|
|
print(str(set(duplicate_ids)))
|
||
|
|
print("Please correct them before continuing.")
|
||
|
|
exit(1)
|
||
|
|
|
||
|
|
if args.showID:
|
||
|
|
for atest in alltests:
|
||
|
|
print_test_case(atest)
|
||
|
|
exit(0)
|
||
|
|
|
||
|
|
if isinstance(args.category, list) and (len(args.category) == 0):
|
||
|
|
print("Available categories:")
|
||
|
|
print_sll(ucat)
|
||
|
|
exit(0)
|
||
|
|
|
||
|
|
if args.list:
|
||
|
|
if args.list:
|
||
|
|
list_test_cases(alltests)
|
||
|
|
exit(0)
|
||
|
|
|
||
|
|
if len(alltests):
|
||
|
|
catresults = test_runner(pm, args, alltests)
|
||
|
|
else:
|
||
|
|
catresults = 'No tests found\n'
|
||
|
|
if args.notap:
|
||
|
|
print('Tap output suppression requested\n')
|
||
|
|
else:
|
||
|
|
print('All test results: \n\n{}'.format(catresults))
|
||
|
|
|
||
|
|
def main():
|
||
|
|
"""
|
||
|
|
Start of execution; set up argument parser and get the arguments,
|
||
|
|
and start operations.
|
||
|
|
"""
|
||
|
|
parser = args_parse()
|
||
|
|
parser = set_args(parser)
|
||
|
|
pm = PluginMgr(parser)
|
||
|
|
parser = pm.call_add_args(parser)
|
||
|
|
(args, remaining) = parser.parse_known_args()
|
||
|
|
args.NAMES = NAMES
|
||
|
|
check_default_settings(args, remaining, pm)
|
||
|
|
if args.verbose > 2:
|
||
|
|
print('args is {}'.format(args))
|
||
|
|
|
||
|
|
set_operation_mode(pm, args)
|
||
|
|
|
||
|
|
exit(0)
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
main()
|