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tracker.py

import os

from tap.directive import Directive
from tap.line import Result

try:
    import more_itertools  # noqa
    import yaml  # noqa

ENABLE_VERSION_13 = True
except ImportError:  # pragma: no cover
    ENABLE_VERSION_13 = False

class Tracker:
    def __init__(
        self,
        outdir=None,
        combined=False,
        streaming=False,
        stream=None,
        header=True,
        plan=None,
    ):
        self.outdir = outdir

# Combine all the test results into one file.
        self.combined = combined
        self.combined_line_number = 0
        # Test case ordering is important for the combined results
        # because of how numbers are assigned. The test cases
        # must be tracked in order so that reporting can sequence
        # the line numbers properly.
        self.combined_test_cases_seen = []

# Stream output directly to a stream instead of file output.
        self.streaming = streaming
        self.stream = stream
        # The total number of tests we expect (or None if we don't know yet).
        self.plan = plan
        self._plan_written = False

# Display the test case header unless told not to.
        self.header = header

# Internal state for tracking each test case.
        self._test_cases = {}

self._sanitized_table = str.maketrans(" \\/\n", "----")

if self.streaming:
            self._write_tap_version(self.stream)
            if self.plan is not None:
                self._write_plan(self.stream)

def _get_outdir(self):
        return self._outdir

def _set_outdir(self, outdir):
        self._outdir = outdir
        if outdir and not os.path.exists(outdir):
            os.makedirs(outdir)

outdir = property(_get_outdir, _set_outdir)

def _track(self, class_name):
        """Keep track of which test cases have executed."""
        if self._test_cases.get(class_name) is None:
            if self.streaming and self.header:
                self._write_test_case_header(class_name, self.stream)

self._test_cases[class_name] = []
            if self.combined:
                self.combined_test_cases_seen.append(class_name)

def add_ok(self, class_name, description, directive="", diagnostics=None):
        result = Result(
            ok=True,
            number=self._get_next_line_number(class_name),
            description=description,
            diagnostics=diagnostics,
            directive=Directive(directive),
        )
        self._add_line(class_name, result)

def add_not_ok(self, class_name, description, directive="", diagnostics=None):
        result = Result(
            ok=False,
            number=self._get_next_line_number(class_name),
            description=description,
            diagnostics=diagnostics,
            directive=Directive(directive),
        )
        self._add_line(class_name, result)

def add_skip(self, class_name, description, reason):
        directive = f"SKIP {reason}"
        result = Result(
            ok=True,
            number=self._get_next_line_number(class_name),
            description=description,
            directive=Directive(directive),
        )
        self._add_line(class_name, result)

def _add_line(self, class_name, result):
        self._track(class_name)
        if self.streaming:
            print(result, file=self.stream)
        self._test_cases[class_name].append(result)

def _get_next_line_number(self, class_name):
        if self.combined or self.streaming:
            # This has an obvious side effect. Oh well.
            self.combined_line_number += 1
            return self.combined_line_number
        else:
            try:
                return len(self._test_cases[class_name]) + 1
            except KeyError:
                # A result is created before the call to _track so the test
                # case may not be tracked yet. In that case, the line is 1.
                return 1

def set_plan(self, total):
        """Notify the tracker how many total tests there will be."""
        self.plan = total
        if self.streaming:
            # This will only write the plan if we haven't written it
            # already but we want to check if we already wrote a
            # test out (in which case we can't just write the plan out
            # right here).
            if not self.combined_test_cases_seen:
                self._write_plan(self.stream)
        elif not self.combined:
            raise ValueError(
                "set_plan can only be used with combined or streaming output"
            )

def generate_tap_reports(self):
        """Generate TAP reports.

The results are either combined into a single output file or
        the output file name is generated from the test case.
        """
        if self.streaming:
            # We're streaming but set_plan wasn't called, so we can only
            # know the plan now (at the end).
            if not self._plan_written:
                print(f"1..{self.combined_line_number}", file=self.stream)
                self._plan_written = True
            return

if self.combined:
            combined_file = "testresults.tap"
            if self.outdir:
                combined_file = os.path.join(self.outdir, combined_file)
            with open(combined_file, "w") as out_file:
                self._write_tap_version(out_file)
                if self.plan is not None:
                    print(f"1..{self.plan}", file=out_file)
                for test_case in self.combined_test_cases_seen:
                    self.generate_tap_report(
                        test_case, self._test_cases[test_case], out_file
                    )
                if self.plan is None:
                    print(f"1..{self.combined_line_number}", file=out_file)
        else:
            for test_case, tap_lines in self._test_cases.items():
                with open(self._get_tap_file_path(test_case), "w") as out_file:
                    self._write_tap_version(out_file)
                    self.generate_tap_report(test_case, tap_lines, out_file)

def generate_tap_report(self, test_case, tap_lines, out_file):
        self._write_test_case_header(test_case, out_file)

for tap_line in tap_lines:
            print(tap_line, file=out_file)

# For combined results, the plan is only output once after
        # all the test cases complete.
        if not self.combined:
            print(f"1..{len(tap_lines)}", file=out_file)

def _write_tap_version(self, filename):
        """Write a Version 13 TAP row.

``filename`` can be a filename or a stream.
        """
        if ENABLE_VERSION_13:
            print("TAP version 13", file=filename)

def _write_plan(self, stream):
        """Write the plan line to the stream.

If we have a plan and have not yet written it out, write it to
        the given stream.
        """
        if self.plan is not None:
            if not self._plan_written:
                print(f"1..{self.plan}", file=stream)
            self._plan_written = True

def _write_test_case_header(self, test_case, stream):
        print(f"# TAP results for {test_case}", file=stream)

def _get_tap_file_path(self, test_case):
        """Get the TAP output file path for the test case."""
        sanitized_test_case = test_case.translate(self._sanitized_table)
        tap_file = sanitized_test_case + ".tap"
        if self.outdir:
            return os.path.join(self.outdir, tap_file)
        return tap_file

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