path: root/src/_pytest/skipping.py

""" support for skip/xfail functions and markers. """
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

from _pytest.config import hookimpl
from _pytest.mark.evaluate import MarkEvaluator
from _pytest.outcomes import fail
from _pytest.outcomes import skip
from _pytest.outcomes import xfail


def pytest_addoption(parser):
    group = parser.getgroup("general")
    group.addoption(
        "--runxfail",
        action="store_true",
        dest="runxfail",
        default=False,
        help="run tests even if they are marked xfail",
    )

    parser.addini(
        "xfail_strict",
        "default for the strict parameter of xfail "
        "markers when not given explicitly (default: False)",
        default=False,
        type="bool",
    )


def pytest_configure(config):
    if config.option.runxfail:
        # yay a hack
        import pytest

        old = pytest.xfail
        config._cleanup.append(lambda: setattr(pytest, "xfail", old))

        def nop(*args, **kwargs):
            pass

        nop.Exception = xfail.Exception
        setattr(pytest, "xfail", nop)

    config.addinivalue_line(
        "markers",
        "skip(reason=None): skip the given test function with an optional reason. "
        'Example: skip(reason="no way of currently testing this") skips the '
        "test.",
    )
    config.addinivalue_line(
        "markers",
        "skipif(condition): skip the given test function if eval(condition) "
        "results in a True value.  Evaluation happens within the "
        "module global context. Example: skipif('sys.platform == \"win32\"') "
        "skips the test if we are on the win32 platform. see "
        "https://docs.pytest.org/en/latest/skipping.html",
    )
    config.addinivalue_line(
        "markers",
        "xfail(condition, reason=None, run=True, raises=None, strict=False): "
        "mark the test function as an expected failure if eval(condition) "
        "has a True value. Optionally specify a reason for better reporting "
        "and run=False if you don't even want to execute the test function. "
        "If only specific exception(s) are expected, you can list them in "
        "raises, and if the test fails in other ways, it will be reported as "
        "a true failure. See https://docs.pytest.org/en/latest/skipping.html",
    )


@hookimpl(tryfirst=True)
def pytest_runtest_setup(item):
    # Check if skip or skipif are specified as pytest marks
    item._skipped_by_mark = False
    eval_skipif = MarkEvaluator(item, "skipif")
    if eval_skipif.istrue():
        item._skipped_by_mark = True
        skip(eval_skipif.getexplanation())

    for skip_info in item.iter_markers(name="skip"):
        item._skipped_by_mark = True
        if "reason" in skip_info.kwargs:
            skip(skip_info.kwargs["reason"])
        elif skip_info.args:
            skip(skip_info.args[0])
        else:
            skip("unconditional skip")

    item._evalxfail = MarkEvaluator(item, "xfail")
    check_xfail_no_run(item)


@hookimpl(hookwrapper=True)
def pytest_pyfunc_call(pyfuncitem):
    check_xfail_no_run(pyfuncitem)
    outcome = yield
    passed = outcome.excinfo is None
    if passed:
        check_strict_xfail(pyfuncitem)


def check_xfail_no_run(item):
    """check xfail(run=False)"""
    if not item.config.option.runxfail:
        evalxfail = item._evalxfail
        if evalxfail.istrue():
            if not evalxfail.get("run", True):
                xfail("[NOTRUN] " + evalxfail.getexplanation())


def check_strict_xfail(pyfuncitem):
    """check xfail(strict=True) for the given PASSING test"""
    evalxfail = pyfuncitem._evalxfail
    if evalxfail.istrue():
        strict_default = pyfuncitem.config.getini("xfail_strict")
        is_strict_xfail = evalxfail.get("strict", strict_default)
        if is_strict_xfail:
            del pyfuncitem._evalxfail
            explanation = evalxfail.getexplanation()
            fail("[XPASS(strict)] " + explanation, pytrace=False)


@hookimpl(hookwrapper=True)
def pytest_runtest_makereport(item, call):
    outcome = yield
    rep = outcome.get_result()
    evalxfail = getattr(item, "_evalxfail", None)
    # unitttest special case, see setting of _unexpectedsuccess
    if hasattr(item, "_unexpectedsuccess") and rep.when == "call":
        from _pytest.compat import _is_unittest_unexpected_success_a_failure

        if item._unexpectedsuccess:
            rep.longrepr = "Unexpected success: {}".format(item._unexpectedsuccess)
        else:
            rep.longrepr = "Unexpected success"
        if _is_unittest_unexpected_success_a_failure():
            rep.outcome = "failed"
        else:
            rep.outcome = "passed"
            rep.wasxfail = rep.longrepr
    elif item.config.option.runxfail:
        pass  # don't interefere
    elif call.excinfo and call.excinfo.errisinstance(xfail.Exception):
        rep.wasxfail = "reason: " + call.excinfo.value.msg
        rep.outcome = "skipped"
    elif evalxfail and not rep.skipped and evalxfail.wasvalid() and evalxfail.istrue():
        if call.excinfo:
            if evalxfail.invalidraise(call.excinfo.value):
                rep.outcome = "failed"
            else:
                rep.outcome = "skipped"
                rep.wasxfail = evalxfail.getexplanation()
        elif call.when == "call":
            strict_default = item.config.getini("xfail_strict")
            is_strict_xfail = evalxfail.get("strict", strict_default)
            explanation = evalxfail.getexplanation()
            if is_strict_xfail:
                rep.outcome = "failed"
                rep.longrepr = "[XPASS(strict)] {}".format(explanation)
            else:
                rep.outcome = "passed"
                rep.wasxfail = explanation
    elif (
        getattr(item, "_skipped_by_mark", False)
        and rep.skipped
        and type(rep.longrepr) is tuple
    ):
        # skipped by mark.skipif; change the location of the failure
        # to point to the item definition, otherwise it will display
        # the location of where the skip exception was raised within pytest
        filename, line, reason = rep.longrepr
        filename, line = item.location[:2]
        rep.longrepr = filename, line, reason


# called by terminalreporter progress reporting


def pytest_report_teststatus(report):
    if hasattr(report, "wasxfail"):
        if report.skipped:
            return "xfailed", "x", "XFAIL"
        elif report.passed:
            return "xpassed", "X", "XPASS"


# called by the terminalreporter instance/plugin


def pytest_terminal_summary(terminalreporter):
    tr = terminalreporter
    if not tr.reportchars:
        return

    lines = []
    for char in tr.reportchars:
        action = REPORTCHAR_ACTIONS.get(char, lambda tr, lines: None)
        action(terminalreporter, lines)

    if lines:
        tr._tw.sep("=", "short test summary info")
        for line in lines:
            tr._tw.line(line)


def _get_line_with_reprcrash_message(config, rep, termwidth):
    """Get summary line for a report, trying to add reprcrash message."""
    verbose_word = _get_report_str(config, rep)
    pos = _get_pos(config, rep)

    line = "%s %s" % (verbose_word, pos)

    len_line = len(line)
    ellipsis = "..."
    len_ellipsis = len(ellipsis)

    if len_line > termwidth - len_ellipsis:
        # No space for an additional message.
        return line

    try:
        msg = rep.longrepr.reprcrash.message
    except AttributeError:
        pass
    else:
        # Only use the first line.
        i = msg.find("\n")
        if i != -1:
            msg = msg[:i]
        len_msg = len(msg)

        sep = ": "
        len_sep = len(sep)
        max_len = termwidth - len_line - len_sep
        if max_len >= len_ellipsis:
            if len_msg > max_len:
                msg = msg[: (max_len - len_ellipsis)] + ellipsis
            line += sep + msg
    return line


def show_simple(terminalreporter, lines, stat):
    failed = terminalreporter.stats.get(stat)
    if failed:
        config = terminalreporter.config
        termwidth = terminalreporter.writer.fullwidth
        for rep in failed:
            line = _get_line_with_reprcrash_message(config, rep, termwidth)
            lines.append(line)


def show_xfailed(terminalreporter, lines):
    xfailed = terminalreporter.stats.get("xfailed")
    if xfailed:
        config = terminalreporter.config
        for rep in xfailed:
            verbose_word = _get_report_str(config, rep)
            pos = _get_pos(config, rep)
            lines.append("%s %s" % (verbose_word, pos))
            reason = rep.wasxfail
            if reason:
                lines.append("  " + str(reason))


def show_xpassed(terminalreporter, lines):
    xpassed = terminalreporter.stats.get("xpassed")
    if xpassed:
        config = terminalreporter.config
        for rep in xpassed:
            verbose_word = _get_report_str(config, rep)
            pos = _get_pos(config, rep)
            reason = rep.wasxfail
            lines.append("%s %s %s" % (verbose_word, pos, reason))


def folded_skips(skipped):
    d = {}
    for event in skipped:
        key = event.longrepr
        assert len(key) == 3, (event, key)
        keywords = getattr(event, "keywords", {})
        # folding reports with global pytestmark variable
        # this is workaround, because for now we cannot identify the scope of a skip marker
        # TODO: revisit after marks scope would be fixed
        if (
            event.when == "setup"
            and "skip" in keywords
            and "pytestmark" not in keywords
        ):
            key = (key[0], None, key[2])
        d.setdefault(key, []).append(event)
    values = []
    for key, events in d.items():
        values.append((len(events),) + key)
    return values


def show_skipped(terminalreporter, lines):
    tr = terminalreporter
    skipped = tr.stats.get("skipped", [])
    if skipped:
        fskips = folded_skips(skipped)
        if fskips:
            verbose_word = _get_report_str(terminalreporter.config, report=skipped[0])
            for num, fspath, lineno, reason in fskips:
                if reason.startswith("Skipped: "):
                    reason = reason[9:]
                if lineno is not None:
                    lines.append(
                        "%s [%d] %s:%d: %s"
                        % (verbose_word, num, fspath, lineno + 1, reason)
                    )
                else:
                    lines.append("%s [%d] %s: %s" % (verbose_word, num, fspath, reason))


def shower(stat):
    def show_(terminalreporter, lines):
        return show_simple(terminalreporter, lines, stat)

    return show_


def _get_report_str(config, report):
    _category, _short, verbose = config.hook.pytest_report_teststatus(
        report=report, config=config
    )
    return verbose


def _get_pos(config, rep):
    nodeid = config.cwd_relative_nodeid(rep.nodeid)
    return nodeid


REPORTCHAR_ACTIONS = {
    "x": show_xfailed,
    "X": show_xpassed,
    "f": shower("failed"),
    "F": shower("failed"),
    "s": show_skipped,
    "S": show_skipped,
    "p": shower("passed"),
    "E": shower("error"),
}