terminal.py

""" terminal reporting of the full testing process.

This is a good source for looking at the various reporting hooks.
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import argparse
import collections
import platform
import sys
import time

import attr
import pluggy
import py
import six
from more_itertools import collapse

import pytest
from _pytest import nodes
from _pytest.main import EXIT_INTERRUPTED
from _pytest.main import EXIT_NOTESTSCOLLECTED
from _pytest.main import EXIT_OK
from _pytest.main import EXIT_TESTSFAILED
from _pytest.main import EXIT_USAGEERROR


class MoreQuietAction(argparse.Action):
    """
    a modified copy of the argparse count action which counts down and updates
    the legacy quiet attribute at the same time

    used to unify verbosity handling
    """

    def __init__(self, option_strings, dest, default=None, required=False, help=None):
        super(MoreQuietAction, self).__init__(
            option_strings=option_strings,
            dest=dest,
            nargs=0,
            default=default,
            required=required,
            help=help,
        )

    def __call__(self, parser, namespace, values, option_string=None):
        new_count = getattr(namespace, self.dest, 0) - 1
        setattr(namespace, self.dest, new_count)
        # todo Deprecate config.quiet
        namespace.quiet = getattr(namespace, "quiet", 0) + 1


def pytest_addoption(parser):
    group = parser.getgroup("terminal reporting", "reporting", after="general")
    group._addoption(
        "-v",
        "--verbose",
        action="count",
        default=0,
        dest="verbose",
        help="increase verbosity.",
    ),
    group._addoption(
        "-q",
        "--quiet",
        action=MoreQuietAction,
        default=0,
        dest="verbose",
        help="decrease verbosity.",
    ),
    group._addoption(
        "--verbosity", dest="verbose", type=int, default=0, help="set verbosity"
    )
    group._addoption(
        "-r",
        action="store",
        dest="reportchars",
        default="",
        metavar="chars",
        help="show extra test summary info as specified by chars (f)ailed, "
        "(E)error, (s)skipped, (x)failed, (X)passed, "
        "(p)passed, (P)passed with output, (a)all except pP. "
        "Warnings are displayed at all times except when "
        "--disable-warnings is set",
    )
    group._addoption(
        "--disable-warnings",
        "--disable-pytest-warnings",
        default=False,
        dest="disable_warnings",
        action="store_true",
        help="disable warnings summary",
    )
    group._addoption(
        "-l",
        "--showlocals",
        action="store_true",
        dest="showlocals",
        default=False,
        help="show locals in tracebacks (disabled by default).",
    )
    group._addoption(
        "--tb",
        metavar="style",
        action="store",
        dest="tbstyle",
        default="auto",
        choices=["auto", "long", "short", "no", "line", "native"],
        help="traceback print mode (auto/long/short/line/native/no).",
    )
    group._addoption(
        "--show-capture",
        action="store",
        dest="showcapture",
        choices=["no", "stdout", "stderr", "log", "all"],
        default="all",
        help="Controls how captured stdout/stderr/log is shown on failed tests. "
        "Default is 'all'.",
    )
    group._addoption(
        "--fulltrace",
        "--full-trace",
        action="store_true",
        default=False,
        help="don't cut any tracebacks (default is to cut).",
    )
    group._addoption(
        "--color",
        metavar="color",
        action="store",
        dest="color",
        default="auto",
        choices=["yes", "no", "auto"],
        help="color terminal output (yes/no/auto).",
    )

    parser.addini(
        "console_output_style",
        help="console output: classic or with additional progress information (classic|progress).",
        default="progress",
    )


def pytest_configure(config):
    reporter = TerminalReporter(config, sys.stdout)
    config.pluginmanager.register(reporter, "terminalreporter")
    if config.option.debug or config.option.traceconfig:

        def mywriter(tags, args):
            msg = " ".join(map(str, args))
            reporter.write_line("[traceconfig] " + msg)

        config.trace.root.setprocessor("pytest:config", mywriter)


def getreportopt(config):
    reportopts = ""
    reportchars = config.option.reportchars
    if not config.option.disable_warnings and "w" not in reportchars:
        reportchars += "w"
    elif config.option.disable_warnings and "w" in reportchars:
        reportchars = reportchars.replace("w", "")
    if reportchars:
        for char in reportchars:
            if char not in reportopts and char != "a":
                reportopts += char
            elif char == "a":
                reportopts = "sxXwEf"
    return reportopts


def pytest_report_teststatus(report):
    if report.passed:
        letter = "."
    elif report.skipped:
        letter = "s"
    elif report.failed:
        letter = "F"
        if report.when != "call":
            letter = "f"
    return report.outcome, letter, report.outcome.upper()


@attr.s
class WarningReport(object):
    """
    Simple structure to hold warnings information captured by ``pytest_warning_captured``.

    :ivar str message: user friendly message about the warning
    :ivar str|None nodeid: node id that generated the warning (see ``get_location``).
    :ivar tuple|py.path.local fslocation:
        file system location of the source of the warning (see ``get_location``).
    """

    message = attr.ib()
    nodeid = attr.ib(default=None)
    fslocation = attr.ib(default=None)

    def get_location(self, config):
        """
        Returns the more user-friendly information about the location
        of a warning, or None.
        """
        if self.nodeid:
            return self.nodeid
        if self.fslocation:
            if isinstance(self.fslocation, tuple) and len(self.fslocation) >= 2:
                filename, linenum = self.fslocation[:2]
                relpath = py.path.local(filename).relto(config.invocation_dir)
                if not relpath:
                    relpath = str(filename)
                return "%s:%s" % (relpath, linenum)
            else:
                return str(self.fslocation)
        return None


class TerminalReporter(object):
    def __init__(self, config, file=None):
        import _pytest.config

        self.config = config
        self.verbosity = self.config.option.verbose
        self.showheader = self.verbosity >= 0
        self.showfspath = self.verbosity >= 0
        self.showlongtestinfo = self.verbosity > 0
        self._numcollected = 0
        self._session = None

        self.stats = {}
        self.startdir = py.path.local()
        if file is None:
            file = sys.stdout
        self._tw = _pytest.config.create_terminal_writer(config, file)
        # self.writer will be deprecated in pytest-3.4
        self.writer = self._tw
        self._screen_width = self._tw.fullwidth
        self.currentfspath = None
        self.reportchars = getreportopt(config)
        self.hasmarkup = self._tw.hasmarkup
        self.isatty = file.isatty()
        self._progress_nodeids_reported = set()
        self._show_progress_info = self._determine_show_progress_info()
        self._collect_report_last_write = None

    def _determine_show_progress_info(self):
        """Return True if we should display progress information based on the current config"""
        # do not show progress if we are not capturing output (#3038)
        if self.config.getoption("capture") == "no":
            return False
        # do not show progress if we are showing fixture setup/teardown
        if self.config.getoption("setupshow"):
            return False
        return self.config.getini("console_output_style") in ("progress", "count")

    def hasopt(self, char):
        char = {"xfailed": "x", "skipped": "s"}.get(char, char)
        return char in self.reportchars

    def write_fspath_result(self, nodeid, res, **markup):
        fspath = self.config.rootdir.join(nodeid.split("::")[0])
        if fspath != self.currentfspath:
            if self.currentfspath is not None and self._show_progress_info:
                self._write_progress_information_filling_space()
            self.currentfspath = fspath
            fspath = self.startdir.bestrelpath(fspath)
            self._tw.line()
            self._tw.write(fspath + " ")
        self._tw.write(res, **markup)

    def write_ensure_prefix(self, prefix, extra="", **kwargs):
        if self.currentfspath != prefix:
            self._tw.line()
            self.currentfspath = prefix
            self._tw.write(prefix)
        if extra:
            self._tw.write(extra, **kwargs)
            self.currentfspath = -2

    def ensure_newline(self):
        if self.currentfspath:
            self._tw.line()
            self.currentfspath = None

    def write(self, content, **markup):
        self._tw.write(content, **markup)

    def write_line(self, line, **markup):
        if not isinstance(line, six.text_type):
            line = six.text_type(line, errors="replace")
        self.ensure_newline()
        self._tw.line(line, **markup)

    def rewrite(self, line, **markup):
        """
        Rewinds the terminal cursor to the beginning and writes the given line.

        :kwarg erase: if True, will also add spaces until the full terminal width to ensure
            previous lines are properly erased.

        The rest of the keyword arguments are markup instructions.
        """
        erase = markup.pop("erase", False)
        if erase:
            fill_count = self._tw.fullwidth - len(line) - 1
            fill = " " * fill_count
        else:
            fill = ""
        line = str(line)
        self._tw.write("\r" + line + fill, **markup)

    def write_sep(self, sep, title=None, **markup):
        self.ensure_newline()
        self._tw.sep(sep, title, **markup)

    def section(self, title, sep="=", **kw):
        self._tw.sep(sep, title, **kw)

    def line(self, msg, **kw):
        self._tw.line(msg, **kw)

    def pytest_internalerror(self, excrepr):
        for line in six.text_type(excrepr).split("\n"):
            self.write_line("INTERNALERROR> " + line)
        return 1

    def pytest_warning_captured(self, warning_message, item):
        # from _pytest.nodes import get_fslocation_from_item
        from _pytest.warnings import warning_record_to_str

        warnings = self.stats.setdefault("warnings", [])
        fslocation = warning_message.filename, warning_message.lineno
        message = warning_record_to_str(warning_message)

        nodeid = item.nodeid if item is not None else ""
        warning_report = WarningReport(
            fslocation=fslocation, message=message, nodeid=nodeid
        )
        warnings.append(warning_report)

    def pytest_plugin_registered(self, plugin):
        if self.config.option.traceconfig:
            msg = "PLUGIN registered: %s" % (plugin,)
            # XXX this event may happen during setup/teardown time
            #     which unfortunately captures our output here
            #     which garbles our output if we use self.write_line
            self.write_line(msg)

    def pytest_deselected(self, items):
        self.stats.setdefault("deselected", []).extend(items)

    def pytest_runtest_logstart(self, nodeid, location):
        # ensure that the path is printed before the
        # 1st test of a module starts running
        if self.showlongtestinfo:
            line = self._locationline(nodeid, *location)
            self.write_ensure_prefix(line, "")
        elif self.showfspath:
            fsid = nodeid.split("::")[0]
            self.write_fspath_result(fsid, "")

    def pytest_runtest_logreport(self, report):
        rep = report
        res = self.config.hook.pytest_report_teststatus(report=rep, config=self.config)
        category, letter, word = res
        if isinstance(word, tuple):
            word, markup = word
        else:
            markup = None
        self.stats.setdefault(category, []).append(rep)
        self._tests_ran = True
        if not letter and not word:
            # probably passed setup/teardown
            return
        running_xdist = hasattr(rep, "node")
        if markup is None:
            was_xfail = hasattr(report, "wasxfail")
            if rep.passed and not was_xfail:
                markup = {"green": True}
            elif rep.passed and was_xfail:
                markup = {"yellow": True}
            elif rep.failed:
                markup = {"red": True}
            elif rep.skipped:
                markup = {"yellow": True}
            else:
                markup = {}
        if self.verbosity <= 0:
            if not running_xdist and self.showfspath:
                self.write_fspath_result(rep.nodeid, letter, **markup)
            else:
                self._tw.write(letter, **markup)
        else:
            self._progress_nodeids_reported.add(rep.nodeid)
            line = self._locationline(rep.nodeid, *rep.location)
            if not running_xdist:
                self.write_ensure_prefix(line, word, **markup)
                if self._show_progress_info:
                    self._write_progress_information_filling_space()
            else:
                self.ensure_newline()
                self._tw.write("[%s]" % rep.node.gateway.id)
                if self._show_progress_info:
                    self._tw.write(
                        self._get_progress_information_message() + " ", cyan=True
                    )
                else:
                    self._tw.write(" ")
                self._tw.write(word, **markup)
                self._tw.write(" " + line)
                self.currentfspath = -2

    def pytest_runtest_logfinish(self, nodeid):
        if self.config.getini("console_output_style") == "count":
            num_tests = self._session.testscollected
            progress_length = len(" [{}/{}]".format(str(num_tests), str(num_tests)))
        else:
            progress_length = len(" [100%]")

        if self.verbosity <= 0 and self._show_progress_info:
            self._progress_nodeids_reported.add(nodeid)
            last_item = (
                len(self._progress_nodeids_reported) == self._session.testscollected
            )
            if last_item:
                self._write_progress_information_filling_space()
            else:
                w = self._width_of_current_line
                past_edge = w + progress_length + 1 >= self._screen_width
                if past_edge:
                    msg = self._get_progress_information_message()
                    self._tw.write(msg + "\n", cyan=True)

    def _get_progress_information_message(self):
        if self.config.getoption("capture") == "no":
            return ""
        collected = self._session.testscollected
        if self.config.getini("console_output_style") == "count":
            if collected:
                progress = self._progress_nodeids_reported
                counter_format = "{{:{}d}}".format(len(str(collected)))
                format_string = " [{}/{{}}]".format(counter_format)
                return format_string.format(len(progress), collected)
            return " [ {} / {} ]".format(collected, collected)
        else:
            if collected:
                progress = len(self._progress_nodeids_reported) * 100 // collected
                return " [{:3d}%]".format(progress)
            return " [100%]"

    def _write_progress_information_filling_space(self):
        msg = self._get_progress_information_message()
        w = self._width_of_current_line
        fill = self._tw.fullwidth - w - 1
        self.write(msg.rjust(fill), cyan=True)

    @property
    def _width_of_current_line(self):
        """Return the width of current line, using the superior implementation of py-1.6 when available"""
        try:
            return self._tw.width_of_current_line
        except AttributeError:
            # py < 1.6.0
            return self._tw.chars_on_current_line

    def pytest_collection(self):
        if self.isatty:
            if self.config.option.verbose >= 0:
                self.write("collecting ... ", bold=True)
                self._collect_report_last_write = time.time()
        elif self.config.option.verbose >= 1:
            self.write("collecting ... ", bold=True)

    def pytest_collectreport(self, report):
        if report.failed:
            self.stats.setdefault("error", []).append(report)
        elif report.skipped:
            self.stats.setdefault("skipped", []).append(report)
        items = [x for x in report.result if isinstance(x, pytest.Item)]
        self._numcollected += len(items)
        if self.isatty:
            self.report_collect()

    def report_collect(self, final=False):
        if self.config.option.verbose < 0:
            return

        if not final:
            # Only write "collecting" report every 0.5s.
            t = time.time()
            if (
                self._collect_report_last_write is not None
                and self._collect_report_last_write > t - 0.5
            ):
                return
            self._collect_report_last_write = t

        errors = len(self.stats.get("error", []))
        skipped = len(self.stats.get("skipped", []))
        deselected = len(self.stats.get("deselected", []))
        selected = self._numcollected - errors - skipped - deselected
        if final:
            line = "collected "
        else:
            line = "collecting "
        line += (
            str(self._numcollected) + " item" + ("" if self._numcollected == 1 else "s")
        )
        if errors:
            line += " / %d errors" % errors
        if deselected:
            line += " / %d deselected" % deselected
        if skipped:
            line += " / %d skipped" % skipped
        if self._numcollected > selected > 0:
            line += " / %d selected" % selected
        if self.isatty:
            self.rewrite(line, bold=True, erase=True)
            if final:
                self.write("\n")
        else:
            self.write_line(line)

    @pytest.hookimpl(trylast=True)
    def pytest_collection_modifyitems(self):
        self.report_collect(True)

    @pytest.hookimpl(trylast=True)
    def pytest_sessionstart(self, session):
        self._session = session
        self._sessionstarttime = time.time()
        if not self.showheader:
            return
        self.write_sep("=", "test session starts", bold=True)
        verinfo = platform.python_version()
        msg = "platform %s -- Python %s" % (sys.platform, verinfo)
        if hasattr(sys, "pypy_version_info"):
            verinfo = ".".join(map(str, sys.pypy_version_info[:3]))
            msg += "[pypy-%s-%s]" % (verinfo, sys.pypy_version_info[3])
        msg += ", pytest-%s, py-%s, pluggy-%s" % (
            pytest.__version__,
            py.__version__,
            pluggy.__version__,
        )
        if (
            self.verbosity > 0
            or self.config.option.debug
            or getattr(self.config.option, "pastebin", None)
        ):
            msg += " -- " + str(sys.executable)
        self.write_line(msg)
        lines = self.config.hook.pytest_report_header(
            config=self.config, startdir=self.startdir
        )
        self._write_report_lines_from_hooks(lines)

    def _write_report_lines_from_hooks(self, lines):
        lines.reverse()
        for line in collapse(lines):
            self.write_line(line)

    def pytest_report_header(self, config):
        inifile = ""
        if config.inifile:
            inifile = " " + config.rootdir.bestrelpath(config.inifile)
        lines = ["rootdir: %s, inifile:%s" % (config.rootdir, inifile)]

        plugininfo = config.pluginmanager.list_plugin_distinfo()
        if plugininfo:

            lines.append("plugins: %s" % ", ".join(_plugin_nameversions(plugininfo)))
        return lines

    def pytest_collection_finish(self, session):
        if self.config.option.collectonly:
            self._printcollecteditems(session.items)
            if self.stats.get("failed"):
                self._tw.sep("!", "collection failures")
                for rep in self.stats.get("failed"):
                    rep.toterminal(self._tw)
                return 1
            return 0
        lines = self.config.hook.pytest_report_collectionfinish(
            config=self.config, startdir=self.startdir, items=session.items
        )
        self._write_report_lines_from_hooks(lines)

    def _printcollecteditems(self, items):
        # to print out items and their parent collectors
        # we take care to leave out Instances aka ()
        # because later versions are going to get rid of them anyway
        if self.config.option.verbose < 0:
            if self.config.option.verbose < -1:
                counts = {}
                for item in items:
                    name = item.nodeid.split("::", 1)[0]
                    counts[name] = counts.get(name, 0) + 1
                for name, count in sorted(counts.items()):
                    self._tw.line("%s: %d" % (name, count))
            else:
                for item in items:
                    self._tw.line(item.nodeid)
            return
        stack = []
        indent = ""
        for item in items:
            needed_collectors = item.listchain()[1:]  # strip root node
            while stack:
                if stack == needed_collectors[: len(stack)]:
                    break
                stack.pop()
            for col in needed_collectors[len(stack) :]:
                stack.append(col)
                if col.name == "()":  # Skip Instances.
                    continue
                indent = (len(stack) - 1) * "  "
                self._tw.line("%s%s" % (indent, col))
                if self.config.option.verbose >= 1:
                    if hasattr(col, "_obj") and col._obj.__doc__:
                        for line in col._obj.__doc__.strip().splitlines():
                            self._tw.line("%s%s" % (indent + "  ", line.strip()))

    @pytest.hookimpl(hookwrapper=True)
    def pytest_sessionfinish(self, exitstatus):
        outcome = yield
        outcome.get_result()
        self._tw.line("")
        summary_exit_codes = (
            EXIT_OK,
            EXIT_TESTSFAILED,
            EXIT_INTERRUPTED,
            EXIT_USAGEERROR,
            EXIT_NOTESTSCOLLECTED,
        )
        if exitstatus in summary_exit_codes:
            self.config.hook.pytest_terminal_summary(
                terminalreporter=self, exitstatus=exitstatus, config=self.config
            )
        if exitstatus == EXIT_INTERRUPTED:
            self._report_keyboardinterrupt()
            del self._keyboardinterrupt_memo
        self.summary_stats()

    @pytest.hookimpl(hookwrapper=True)
    def pytest_terminal_summary(self):
        self.summary_errors()
        self.summary_failures()
        self.summary_warnings()
        yield
        self.summary_passes()
        # Display any extra warnings from teardown here (if any).
        self.summary_warnings()
        self.summary_deprecated_python()

    def pytest_keyboard_interrupt(self, excinfo):
        self._keyboardinterrupt_memo = excinfo.getrepr(funcargs=True)

    def pytest_unconfigure(self):
        if hasattr(self, "_keyboardinterrupt_memo"):
            self._report_keyboardinterrupt()

    def _report_keyboardinterrupt(self):
        excrepr = self._keyboardinterrupt_memo
        msg = excrepr.reprcrash.message
        self.write_sep("!", msg)
        if "KeyboardInterrupt" in msg:
            if self.config.option.fulltrace:
                excrepr.toterminal(self._tw)
            else:
                excrepr.reprcrash.toterminal(self._tw)
                self._tw.line(
                    "(to show a full traceback on KeyboardInterrupt use --fulltrace)",
                    yellow=True,
                )

    def _locationline(self, nodeid, fspath, lineno, domain):
        def mkrel(nodeid):
            line = self.config.cwd_relative_nodeid(nodeid)
            if domain and line.endswith(domain):
                line = line[: -len(domain)]
                values = domain.split("[")
                values[0] = values[0].replace(".", "::")  # don't replace '.' in params
                line += "[".join(values)
            return line

        # collect_fspath comes from testid which has a "/"-normalized path

        if fspath:
            res = mkrel(nodeid)
            if self.verbosity >= 2 and nodeid.split("::")[0] != fspath.replace(
                "\\", nodes.SEP
            ):
                res += " <- " + self.startdir.bestrelpath(fspath)
        else:
            res = "[location]"
        return res + " "

    def _getfailureheadline(self, rep):
        if hasattr(rep, "location"):
            fspath, lineno, domain = rep.location
            return domain
        else:
            return "test session"  # XXX?

    def _getcrashline(self, rep):
        try:
            return str(rep.longrepr.reprcrash)
        except AttributeError:
            try:
                return str(rep.longrepr)[:50]
            except AttributeError:
                return ""

    #
    # summaries for sessionfinish
    #
    def getreports(self, name):
        values = []
        for x in self.stats.get(name, []):
            if not hasattr(x, "_pdbshown"):
                values.append(x)
        return values

    def summary_warnings(self):
        if self.hasopt("w"):
            all_warnings = self.stats.get("warnings")
            if not all_warnings:
                return

            final = hasattr(self, "_already_displayed_warnings")
            if final:
                warning_reports = all_warnings[self._already_displayed_warnings :]
            else:
                warning_reports = all_warnings
            self._already_displayed_warnings = len(warning_reports)
            if not warning_reports:
                return

            reports_grouped_by_message = collections.OrderedDict()
            for wr in warning_reports:
                reports_grouped_by_message.setdefault(wr.message, []).append(wr)

            title = "warnings summary (final)" if final else "warnings summary"
            self.write_sep("=", title, yellow=True, bold=False)
            for message, warning_reports in reports_grouped_by_message.items():
                has_any_location = False
                for w in warning_reports:
                    location = w.get_location(self.config)
                    if location:
                        self._tw.line(str(location))
                        has_any_location = True
                if has_any_location:
                    lines = message.splitlines()
                    indented = "\n".join("  " + x for x in lines)
                    message = indented.rstrip()
                else:
                    message = message.rstrip()
                self._tw.line(message)
                self._tw.line()
            self._tw.line("-- Docs: https://docs.pytest.org/en/latest/warnings.html")

    def summary_passes(self):
        if self.config.option.tbstyle != "no":
            if self.hasopt("P"):
                reports = self.getreports("passed")
                if not reports:
                    return
                self.write_sep("=", "PASSES")
                for rep in reports:
                    if rep.sections:
                        msg = self._getfailureheadline(rep)
                        self.write_sep("_", msg)
                        self._outrep_summary(rep)

    def summary_deprecated_python(self):
        if sys.version_info[:2] <= (3, 4) and self.verbosity >= 0:
            self.write_sep("=", "deprecated python version", yellow=True, bold=False)
            using_version = ".".join(str(x) for x in sys.version_info[:3])
            self.line(
                "You are using Python {}, which will no longer be supported in pytest 5.0".format(
                    using_version
                ),
                yellow=True,
                bold=False,
            )
            self.line("For more information, please read:")
            self.line("  https://docs.pytest.org/en/latest/py27-py34-deprecation.html")

    def print_teardown_sections(self, rep):
        showcapture = self.config.option.showcapture
        if showcapture == "no":
            return
        for secname, content in rep.sections:
            if showcapture != "all" and showcapture not in secname:
                continue
            if "teardown" in secname:
                self._tw.sep("-", secname)
                if content[-1:] == "\n":
                    content = content[:-1]
                self._tw.line(content)

    def summary_failures(self):
        if self.config.option.tbstyle != "no":
            reports = self.getreports("failed")
            if not reports:
                return
            self.write_sep("=", "FAILURES")
            for rep in reports:
                if self.config.option.tbstyle == "line":
                    line = self._getcrashline(rep)
                    self.write_line(line)
                else:
                    msg = self._getfailureheadline(rep)
                    self.write_sep("_", msg, red=True, bold=True)
                    self._outrep_summary(rep)
                    for report in self.getreports(""):
                        if report.nodeid == rep.nodeid and report.when == "teardown":
                            self.print_teardown_sections(report)

    def summary_errors(self):
        if self.config.option.tbstyle != "no":
            reports = self.getreports("error")
            if not reports:
                return
            self.write_sep("=", "ERRORS")
            for rep in self.stats["error"]:
                msg = self._getfailureheadline(rep)
                if rep.when == "collect":
                    msg = "ERROR collecting " + msg
                elif rep.when == "setup":
                    msg = "ERROR at setup of " + msg
                elif rep.when == "teardown":
                    msg = "ERROR at teardown of " + msg
                self.write_sep("_", msg, red=True, bold=True)
                self._outrep_summary(rep)

    def _outrep_summary(self, rep):
        rep.toterminal(self._tw)
        showcapture = self.config.option.showcapture
        if showcapture == "no":
            return
        for secname, content in rep.sections:
            if showcapture != "all" and showcapture not in secname:
                continue
            self._tw.sep("-", secname)
            if content[-1:] == "\n":
                content = content[:-1]
            self._tw.line(content)

    def summary_stats(self):
        session_duration = time.time() - self._sessionstarttime
        (line, color) = build_summary_stats_line(self.stats)
        msg = "%s in %.2f seconds" % (line, session_duration)
        markup = {color: True, "bold": True}

        if self.verbosity >= 0:
            self.write_sep("=", msg, **markup)
        if self.verbosity == -1:
            self.write_line(msg, **markup)


def build_summary_stats_line(stats):
    keys = ("failed passed skipped deselected xfailed xpassed warnings error").split()
    unknown_key_seen = False
    for key in stats.keys():
        if key not in keys:
            if key:  # setup/teardown reports have an empty key, ignore them
                keys.append(key)
                unknown_key_seen = True
    parts = []
    for key in keys:
        val = stats.get(key, None)
        if val:
            parts.append("%d %s" % (len(val), key))

    if parts:
        line = ", ".join(parts)
    else:
        line = "no tests ran"

    if "failed" in stats or "error" in stats:
        color = "red"
    elif "warnings" in stats or unknown_key_seen:
        color = "yellow"
    elif "passed" in stats:
        color = "green"
    else:
        color = "yellow"

    return (line, color)


def _plugin_nameversions(plugininfo):
    values = []
    for plugin, dist in plugininfo:
        # gets us name and version!
        name = "{dist.project_name}-{dist.version}".format(dist=dist)
        # questionable convenience, but it keeps things short
        if name.startswith("pytest-"):
            name = name[7:]
        # we decided to print python package names
        # they can have more than one plugin
        if name not in values:
            values.append(name)
    return values