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# Copyright (c) 2016, Matt Layman
from tap.adapter import Adapter
from tap.directive import Directive
from tap.i18n import _
from tap.line import Result
class Rules(object):
def __init__(self, filename, suite):
self._filename = filename
self._suite = suite
self._lines_seen = {'plan': [], 'test': 0, 'version': []}
def check(self, final_line_count):
"""Check the status of all provided data and update the suite."""
if self._lines_seen['version']:
self._process_version_lines()
self._process_plan_lines(final_line_count)
def _process_version_lines(self):
"""Process version line rules."""
if len(self._lines_seen['version']) > 1:
self._add_error(_('Multiple version lines appeared.'))
elif self._lines_seen['version'][0] != 1:
self._add_error(_('The version must be on the first line.'))
def _process_plan_lines(self, final_line_count):
"""Process plan line rules."""
if not self._lines_seen['plan']:
self._add_error(_('Missing a plan.'))
return
if len(self._lines_seen['plan']) > 1:
self._add_error(_('Only one plan line is permitted per file.'))
return
plan, at_line = self._lines_seen['plan'][0]
if not self._plan_on_valid_line(at_line, final_line_count):
self._add_error(
_('A plan must appear at the beginning or end of the file.'))
return
if plan.expected_tests != self._lines_seen['test']:
self._add_error(_(
'Expected {expected_count} tests '
'but only {seen_count} ran.').format(
expected_count=plan.expected_tests,
seen_count=self._lines_seen['test']))
def _plan_on_valid_line(self, at_line, final_line_count):
"""Check if a plan is on a valid line."""
# Put the common cases first.
if at_line == 1 or at_line == final_line_count:
return True
# The plan may only appear on line 2 if the version is at line 1.
after_version = (
self._lines_seen['version'] and
self._lines_seen['version'][0] == 1 and
at_line == 2)
if after_version:
return True
return False
def handle_bail(self, bail):
"""Handle a bail line."""
self._add_error(_('Bailed: {reason}').format(reason=bail.reason))
def handle_file_does_not_exist(self):
"""Handle a test file that does not exist."""
self._add_error(_('{filename} does not exist.').format(
filename=self._filename))
def handle_skipping_plan(self, skip_plan):
"""Handle a plan that contains a SKIP directive."""
skip_line = Result(
True, None, skip_plan.directive.text, Directive('SKIP'))
self._suite.addTest(Adapter(self._filename, skip_line))
def saw_plan(self, plan, at_line):
"""Record when a plan line was seen."""
self._lines_seen['plan'].append((plan, at_line))
def saw_test(self):
"""Record when a test line was seen."""
self._lines_seen['test'] += 1
def saw_version_at(self, line_counter):
"""Record when a version line was seen."""
self._lines_seen['version'].append(line_counter)
def _add_error(self, message):
"""Add an error test to the suite."""
error_line = Result(False, None, message, Directive(''))
self._suite.addTest(Adapter(self._filename, error_line))