tests/run-tests.py

ssh: add capability detection at startup

Because older servers don't return any output for unknown commands,
it's tricky to add new commands. The approach is this: we add a
"hello" command that reports any interesting capabilities (and other
things that might be of interest in the future). To detect whether
this new command is supported, we issue both it and our startup
detection command ("between") at the beginning of a connection.

#!/usr/bin/env python
#
# run-tests.py - Run a set of tests on Mercurial
#
# Copyright 2006 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.

import os, sys, shutil, re
import tempfile
import difflib
import popen2
from optparse import OptionParser

required_tools = ["python", "diff", "grep", "unzip", "gunzip", "bunzip2", "sed"]

parser = OptionParser("%prog [options] [tests]")
parser.add_option("-v", "--verbose", action="store_true",
    help="output verbose messages")
parser.add_option("-c", "--cover", action="store_true",
    help="print a test coverage report")
parser.add_option("-s", "--cover_stdlib", action="store_true",
    help="print a test coverage report inc. standard libraries")
parser.add_option("-C", "--annotate", action="store_true",
    help="output files annotated with coverage")
(options, args) = parser.parse_args()
verbose = options.verbose
coverage = options.cover or options.cover_stdlib or options.annotate

def vlog(*msg):
    if verbose:
        for m in msg:
            print m,
        print

def splitnewlines(text):
    '''like str.splitlines, but only split on newlines.
    keep line endings.'''
    i = 0
    lines = []
    while True:
        n = text.find('\n', i)
        if n == -1:
            last = text[i:]
            if last:
                lines.append(last)
            return lines
        lines.append(text[i:n+1])
        i = n + 1

def show_diff(expected, output):
    for line in difflib.unified_diff(expected, output,
            "Expected output", "Test output"):
        sys.stdout.write(line)

def find_program(program):
    """Search PATH for a executable program"""
    for p in os.environ.get('PATH', os.defpath).split(os.pathsep):
        name = os.path.join(p, program)
        if os.access(name, os.X_OK):
            return name
    return None

def check_required_tools():
    # Before we go any further, check for pre-requisite tools
    # stuff from coreutils (cat, rm, etc) are not tested
    for p in required_tools:
        if os.name == 'nt':
            p += '.exe'
        found = find_program(p)
        if found:
            vlog("# Found prerequisite", p, "at", found)
        else:
            print "WARNING: Did not find prerequisite tool: "+p

def cleanup_exit():
    if verbose:
        print "# Cleaning up HGTMP", HGTMP
    shutil.rmtree(HGTMP, True)

def install_hg():
    vlog("# Performing temporary installation of HG")
    installerrs = os.path.join("tests", "install.err")

    os.chdir("..") # Get back to hg root
    cmd = ('%s setup.py clean --all'
           ' install --force --home="%s" --install-lib="%s" >%s 2>&1'
           % (sys.executable, INST, PYTHONDIR, installerrs))
    vlog("# Running", cmd)
    if os.system(cmd) == 0:
        if not verbose:
            os.remove(installerrs)
    else:
        f = open(installerrs)
        for line in f:
            print line,
        f.close()
        sys.exit(1)
    os.chdir(TESTDIR)

    os.environ["PATH"] = "%s%s%s" % (BINDIR, os.pathsep, os.environ["PATH"])
    os.environ["PYTHONPATH"] = PYTHONDIR

    if coverage:
        vlog("# Installing coverage wrapper")
        os.environ['COVERAGE_FILE'] = COVERAGE_FILE
        if os.path.exists(COVERAGE_FILE):
            os.unlink(COVERAGE_FILE)
        # Create a wrapper script to invoke hg via coverage.py
        os.rename(os.path.join(BINDIR, "hg"), os.path.join(BINDIR, "_hg.py"))
        f = open(os.path.join(BINDIR, 'hg'), 'w')
        f.write('#!' + sys.executable + '\n')
        f.write('import sys, os; os.execv(sys.executable, [sys.executable, '+ \
            '"%s", "-x", "%s"] + sys.argv[1:])\n' % (
            os.path.join(TESTDIR, 'coverage.py'),
            os.path.join(BINDIR, '_hg.py')))
        f.close()
        os.chmod(os.path.join(BINDIR, 'hg'), 0700)

def output_coverage():
    vlog("# Producing coverage report")
    omit = [BINDIR, TESTDIR, PYTHONDIR]
    if not options.cover_stdlib:
        # Exclude as system paths (ignoring empty strings seen on win)
        omit += [x for x in sys.path if x != '']
    omit = ','.join(omit)
    os.chdir(PYTHONDIR)
    cmd = '"%s" "%s" -r "--omit=%s"' % (
        sys.executable, os.path.join(TESTDIR, 'coverage.py'), omit)
    vlog("# Running: "+cmd)
    os.system(cmd)
    if options.annotate:
        adir = os.path.join(TESTDIR, 'annotated')
        if not os.path.isdir(adir):
            os.mkdir(adir)
        cmd = '"%s" "%s" -a "--directory=%s" "--omit=%s"' % (
            sys.executable, os.path.join(TESTDIR, 'coverage.py'),
            adir, omit)
        vlog("# Running: "+cmd)
        os.system(cmd)

def run(cmd):
    """Run command in a sub-process, capturing the output (stdout and stderr).
    Return the exist code, and output."""
    # TODO: Use subprocess.Popen if we're running on Python 2.4
    if os.name == 'nt':
        tochild, fromchild = os.popen4(cmd)
        tochild.close()
        output = fromchild.read()
        ret = fromchild.close()
        if ret == None:
            ret = 0
    else:
        proc = popen2.Popen4(cmd)
        proc.tochild.close()
        output = proc.fromchild.read()
        ret = proc.wait()
    return ret, splitnewlines(output)

def run_one(test):
    vlog("# Test", test)
    if not verbose:
        sys.stdout.write('.')
        sys.stdout.flush()

    err = os.path.join(TESTDIR, test+".err")
    ref = os.path.join(TESTDIR, test+".out")

    if os.path.exists(err):
        os.remove(err)       # Remove any previous output files

    # Make a tmp subdirectory to work in
    tmpd = os.path.join(HGTMP, test)
    os.mkdir(tmpd)
    os.chdir(tmpd)

    if test.endswith(".py"):
        cmd = '%s "%s"' % (sys.executable, os.path.join(TESTDIR, test))
    else:
        cmd = '"%s"' % (os.path.join(TESTDIR, test))

    # To reliably get the error code from batch files on WinXP,
    # the "cmd /c call" prefix is needed. Grrr
    if os.name == 'nt' and test.endswith(".bat"):
        cmd = 'cmd /c call "%s"' % (os.path.join(TESTDIR, test))

    vlog("# Running", cmd)
    ret, out = run(cmd)
    vlog("# Ret was:", ret)

    diffret = 0
    # If reference output file exists, check test output against it
    if os.path.exists(ref):
        f = open(ref, "r")
        ref_out = splitnewlines(f.read())
        f.close()
    else:
        ref_out = ['']
    if out != ref_out:
        diffret = 1
        print "\nERROR: %s output changed" % (test)
        show_diff(ref_out, out)
    if ret:
        print "\nERROR: %s failed with error code %d" % (test, ret)
    elif diffret:
        ret = diffret

    if ret != 0: # Save errors to a file for diagnosis
        f = open(err, "wb")
        for line in out:
            f.write(line)
        f.close()

    os.chdir(TESTDIR)
    shutil.rmtree(tmpd, True)
    return ret == 0


os.umask(022)

check_required_tools()

# Reset some environment variables to well-known values so that
# the tests produce repeatable output.
os.environ['LANG'] = os.environ['LC_ALL'] = 'C'
os.environ['TZ'] = 'GMT'

os.environ["HGEDITOR"] = sys.executable + ' -c "import sys; sys.exit(0)"'
os.environ["HGMERGE"]  = sys.executable + ' -c "import sys; sys.exit(0)"'
os.environ["HGUSER"]   = "test"
os.environ["HGRCPATH"] = ""

TESTDIR = os.environ["TESTDIR"] = os.getcwd()
HGTMP   = os.environ["HGTMP"]   = tempfile.mkdtemp("", "hgtests.")
vlog("# Using TESTDIR", TESTDIR)
vlog("# Using HGTMP", HGTMP)

INST = os.path.join(HGTMP, "install")
BINDIR = os.path.join(INST, "bin")
PYTHONDIR = os.path.join(INST, "lib", "python")
COVERAGE_FILE = os.path.join(TESTDIR, ".coverage")

try:
    try:
        install_hg()

        tests = 0
        failed = 0

        if len(args) == 0:
            args = os.listdir(".")
        for test in args:
            if test.startswith("test-") and not '~' in test and not '.' in test:
                if not run_one(test):
                    failed += 1
                tests += 1

        print "\n# Ran %d tests, %d failed." % (tests, failed)
        if coverage:
            output_coverage()
    except KeyboardInterrupt:
        failed = True
        print "\ninterrupted!"
finally:
    cleanup_exit()

if failed:
    sys.exit(1)