class Coverage(object):
"""Programmatic access to coverage.py.
To use::
from coverage import Coverage
cov = Coverage()
cov.start()
#.. call your code ..
cov.stop()
cov.html_report(directory='covhtml')
Note: in keeping with Python custom, names starting with underscore are
not part of the public API. They might stop working at any point. Please
limit yourself to documented methods to avoid problems.
"""
# The stack of started Coverage instances.
_instances = []
@classmethod
def current(cls):
"""Get the latest started `Coverage` instance, if any.
Returns: a `Coverage` instance, or None.
.. versionadded:: 5.0
"""
if cls._instances:
return cls._instances[-1]
else:
return None
def __init__(
self,
data_file=_DEFAULT_DATAFILE,
data_suffix=None,
cover_pylib=None,
auto_data=False,
timid=None,
branch=None,
config_file=True,
source=None,
source_pkgs=None,
omit=None,
include=None,
debug=None,
concurrency=None,
check_preimported=False,
context=None,
): # pylint: disable=too-many-arguments
"""
Many of these arguments duplicate and override values that can be
provided in a configuration file. Parameters that are missing here
will use values from the config file.
`data_file` is the base name of the data file to use. The config value
defaults to ".coverage". None can be provided to prevent writing a data
file. `data_suffix` is appended (with a dot) to `data_file` to create
the final file name. If `data_suffix` is simply True, then a suffix is
created with the machine and process identity included.
`cover_pylib` is a boolean determining whether Python code installed
with the Python interpreter is measured. This includes the Python
standard library and any packages installed with the interpreter.
If `auto_data` is true, then any existing data file will be read when
coverage measurement starts, and data will be saved automatically when
measurement stops.
If `timid` is true, then a slower and simpler trace function will be
used. This is important for some environments where manipulation of
tracing functions breaks the faster trace function.
If `branch` is true, then branch coverage will be measured in addition
to the usual statement coverage.
`config_file` determines what configuration file to read:
* If it is ".coveragerc", it is interpreted as if it were True,
for backward compatibility.
* If it is a string, it is the name of the file to read. If the
file can't be read, it is an error.
* If it is True, then a few standard files names are tried
(".coveragerc", "setup.cfg", "tox.ini"). It is not an error for
these files to not be found.
* If it is False, then no configuration file is read.
`source` is a list of file paths or package names. Only code located
in the trees indicated by the file paths or package names will be
measured.
`source_pkgs` is a list of package names. It works the same as
`source`, but can be used to name packages where the name can also be
interpreted as a file path.
`include` and `omit` are lists of file name patterns. Files that match
`include` will be measured, files that match `omit` will not. Each
will also accept a single string argument.
`debug` is a list of strings indicating what debugging information is
desired.
`concurrency` is a string indicating the concurrency library being used
in the measured code. Without this, coverage.py will get incorrect
results if these libraries are in use. Valid strings are "greenlet",
"eventlet", "gevent", "multiprocessing", or "thread" (the default).
This can also be a list of these strings.
If `check_preimported` is true, then when coverage is started, the
already-imported files will be checked to see if they should be
measured by coverage. Importing measured files before coverage is
started can mean that code is missed.
`context` is a string to use as the :ref:`static context
<static_contexts>` label for collected data.
.. versionadded:: 4.0
The `concurrency` parameter.
.. versionadded:: 4.2
The `concurrency` parameter can now be a list of strings.
.. versionadded:: 5.0
The `check_preimported` and `context` parameters.
.. versionadded:: 5.3
The `source_pkgs` parameter.
"""
# data_file=None means no disk file at all. data_file missing means
# use the value from the config file.
self._no_disk = data_file is None
if data_file is _DEFAULT_DATAFILE:
data_file = None
# Build our configuration from a number of sources.
self.config = read_coverage_config(
config_file=config_file,
data_file=data_file,
cover_pylib=cover_pylib,
timid=timid,
branch=branch,
parallel=bool_or_none(data_suffix),
source=source,
source_pkgs=source_pkgs,
run_omit=omit,
run_include=include,
debug=debug,
report_omit=omit,
report_include=include,
concurrency=concurrency,
context=context,
)
# This is injectable by tests.
self._debug_file = None
self._auto_load = self._auto_save = auto_data
self._data_suffix_specified = data_suffix
# Is it ok for no data to be collected?
self._warn_no_data = True
self._warn_unimported_source = True
self._warn_preimported_source = check_preimported
self._no_warn_slugs = None
# A record of all the warnings that have been issued.
self._warnings = []
# Other instance attributes, set later.
self._data = self._collector = None
self._plugins = None
self._inorout = None
self._data_suffix = self._run_suffix = None
self._exclude_re = None
self._debug = None
self._file_mapper = None
# State machine variables:
# Have we initialized everything?
self._inited = False
self._inited_for_start = False
# Have we started collecting and not stopped it?
self._started = False
# Should we write the debug output?
self._should_write_debug = True
# If we have sub-process measurement happening automatically, then we
# want any explicit creation of a Coverage object to mean, this process
# is already coverage-aware, so don't auto-measure it. By now, the
# auto-creation of a Coverage object has already happened. But we can
# find it and tell it not to save its data.
if not env.METACOV:
_prevent_sub_process_measurement()
def _init(self):
"""Set all the initial state.
This is called by the public methods to initialize state. This lets us
construct a :class:`Coverage` object, then tweak its state before this
function is called.
"""
if self._inited:
return
self._inited = True
# Create and configure the debugging controller. COVERAGE_DEBUG_FILE
# is an environment variable, the name of a file to append debug logs
# to.
self._debug = DebugControl(self.config.debug, self._debug_file)
if "multiprocessing" in (self.config.concurrency or ()):
# Multi-processing uses parallel for the subprocesses, so also use
# it for the main process.
self.config.parallel = True
# _exclude_re is a dict that maps exclusion list names to compiled regexes.
self._exclude_re = {}
set_relative_directory()
self._file_mapper = relative_filename if self.config.relative_files else abs_file
# Load plugins
self._plugins = Plugins.load_plugins(self.config.plugins, self.config,
self._debug)
# Run configuring plugins.
for plugin in self._plugins.configurers:
# We need an object with set_option and get_option. Either self or
# self.config will do. Choosing randomly stops people from doing
# other things with those objects, against the public API. Yes,
# this is a bit childish. :)
plugin.configure([self, self.config][int(time.time()) % 2])
def _post_init(self):
"""Stuff to do after everything is initialized."""
if self._should_write_debug:
self._should_write_debug = False
self._write_startup_debug()
# '[run] _crash' will raise an exception if the value is close by in
# the call stack, for testing error handling.
if self.config._crash and self.config._crash in short_stack(limit=4):
raise Exception("Crashing because called by {}".format(
self.config._crash))
def _write_startup_debug(self):
"""Write out debug info at startup if needed."""
wrote_any = False
with self._debug.without_callers():
if self._debug.should('config'):
config_info = sorted(self.config.__dict__.items())
config_info = [(k, v) for k, v in config_info
if not k.startswith('_')]
write_formatted_info(self._debug, "config", config_info)
wrote_any = True
if self._debug.should('sys'):
write_formatted_info(self._debug, "sys", self.sys_info())
for plugin in self._plugins:
header = "sys: " + plugin._coverage_plugin_name
info = plugin.sys_info()
write_formatted_info(self._debug, header, info)
wrote_any = True
if wrote_any:
write_formatted_info(self._debug, "end", ())
def _should_trace(self, filename, frame):
"""Decide whether to trace execution in `filename`.
Calls `_should_trace_internal`, and returns the FileDisposition.
"""
disp = self._inorout.should_trace(filename, frame)
if self._debug.should('trace'):
self._debug.write(disposition_debug_msg(disp))
return disp
def _check_include_omit_etc(self, filename, frame):
"""Check a file name against the include/omit/etc, rules, verbosely.
Returns a boolean: True if the file should be traced, False if not.
"""
reason = self._inorout.check_include_omit_etc(filename, frame)
if self._debug.should('trace'):
if not reason:
msg = "Including %r" % (filename, )
else:
msg = "Not including %r: %s" % (filename, reason)
self._debug.write(msg)
return not reason
def _warn(self, msg, slug=None, once=False):
"""Use `msg` as a warning.
For warning suppression, use `slug` as the shorthand.
If `once` is true, only show this warning once (determined by the
slug.)
"""
if self._no_warn_slugs is None:
self._no_warn_slugs = list(self.config.disable_warnings)
if slug in self._no_warn_slugs:
# Don't issue the warning
return
self._warnings.append(msg)
if slug:
msg = "%s (%s)" % (msg, slug)
if self._debug.should('pid'):
msg = "[%d] %s" % (os.getpid(), msg)
sys.stderr.write("Coverage.py warning: %s\n" % msg)
if once:
self._no_warn_slugs.append(slug)
def get_option(self, option_name):
"""Get an option from the configuration.
`option_name` is a colon-separated string indicating the section and
option name. For example, the ``branch`` option in the ``[run]``
section of the config file would be indicated with `"run:branch"`.
Returns the value of the option. The type depends on the option
selected.
As a special case, an `option_name` of ``"paths"`` will return an
OrderedDict with the entire ``[paths]`` section value.
.. versionadded:: 4.0
"""
return self.config.get_option(option_name)
def set_option(self, option_name, value):
"""Set an option in the configuration.
`option_name` is a colon-separated string indicating the section and
option name. For example, the ``branch`` option in the ``[run]``
section of the config file would be indicated with ``"run:branch"``.
`value` is the new value for the option. This should be an
appropriate Python value. For example, use True for booleans, not the
string ``"True"``.
As an example, calling::
cov.set_option("run:branch", True)
has the same effect as this configuration file::
[run]
branch = True
As a special case, an `option_name` of ``"paths"`` will replace the
entire ``[paths]`` section. The value should be an OrderedDict.
.. versionadded:: 4.0
"""
self.config.set_option(option_name, value)
def load(self):
"""Load previously-collected coverage data from the data file."""
self._init()
if self._collector:
self._collector.reset()
should_skip = self.config.parallel and not os.path.exists(
self.config.data_file)
if not should_skip:
self._init_data(suffix=None)
self._post_init()
if not should_skip:
self._data.read()
def _init_for_start(self):
"""Initialization for start()"""
# Construct the collector.
concurrency = self.config.concurrency or ()
if "multiprocessing" in concurrency:
if not patch_multiprocessing:
raise CoverageException( # pragma: only jython
"multiprocessing is not supported on this Python")
patch_multiprocessing(rcfile=self.config.config_file)
dycon = self.config.dynamic_context
if not dycon or dycon == "none":
context_switchers = []
elif dycon == "test_function":
context_switchers = [should_start_context_test_function]
else:
raise CoverageException(
"Don't understand dynamic_context setting: {!r}".format(dycon))
context_switchers.extend(plugin.dynamic_context
for plugin in self._plugins.context_switchers)
should_start_context = combine_context_switchers(context_switchers)
self._collector = Collector(
should_trace=self._should_trace,
check_include=self._check_include_omit_etc,
should_start_context=should_start_context,
file_mapper=self._file_mapper,
timid=self.config.timid,
branch=self.config.branch,
warn=self._warn,
concurrency=concurrency,
)
suffix = self._data_suffix_specified
if suffix or self.config.parallel:
if not isinstance(suffix, string_class):
# if data_suffix=True, use .machinename.pid.random
suffix = True
else:
suffix = None
self._init_data(suffix)
self._collector.use_data(self._data, self.config.context)
# Early warning if we aren't going to be able to support plugins.
if self._plugins.file_tracers and not self._collector.supports_plugins:
self._warn("Plugin file tracers (%s) aren't supported with %s" % (
", ".join(plugin._coverage_plugin_name
for plugin in self._plugins.file_tracers),
self._collector.tracer_name(),
))
for plugin in self._plugins.file_tracers:
plugin._coverage_enabled = False
# Create the file classifying substructure.
self._inorout = InOrOut(
warn=self._warn,
debug=(self._debug if self._debug.should('trace') else None),
)
self._inorout.configure(self.config)
self._inorout.plugins = self._plugins
self._inorout.disp_class = self._collector.file_disposition_class
# It's useful to write debug info after initing for start.
self._should_write_debug = True
atexit.register(self._atexit)
def _init_data(self, suffix):
"""Create a data file if we don't have one yet."""
if self._data is None:
# Create the data file. We do this at construction time so that the
# data file will be written into the directory where the process
# started rather than wherever the process eventually chdir'd to.
ensure_dir_for_file(self.config.data_file)
self._data = CoverageData(
basename=self.config.data_file,
suffix=suffix,
warn=self._warn,
debug=self._debug,
no_disk=self._no_disk,
)
def start(self):
"""Start measuring code coverage.
Coverage measurement only occurs in functions called after
:meth:`start` is invoked. Statements in the same scope as
:meth:`start` won't be measured.
Once you invoke :meth:`start`, you must also call :meth:`stop`
eventually, or your process might not shut down cleanly.
"""
self._init()
if not self._inited_for_start:
self._inited_for_start = True
self._init_for_start()
self._post_init()
# Issue warnings for possible problems.
self._inorout.warn_conflicting_settings()
# See if we think some code that would eventually be measured has
# already been imported.
if self._warn_preimported_source:
self._inorout.warn_already_imported_files()
if self._auto_load:
self.load()
self._collector.start()
self._started = True
self._instances.append(self)
def stop(self):
"""Stop measuring code coverage."""
if self._instances:
if self._instances[-1] is self:
self._instances.pop()
if self._started:
self._collector.stop()
self._started = False
def _atexit(self):
"""Clean up on process shutdown."""
if self._debug.should("process"):
self._debug.write("atexit: pid: {}, instance: {!r}".format(
os.getpid(), self))
if self._started:
self.stop()
if self._auto_save:
self.save()
def erase(self):
"""Erase previously collected coverage data.
This removes the in-memory data collected in this session as well as
discarding the data file.
"""
self._init()
self._post_init()
if self._collector:
self._collector.reset()
self._init_data(suffix=None)
self._data.erase(parallel=self.config.parallel)
self._data = None
self._inited_for_start = False
def switch_context(self, new_context):
"""Switch to a new dynamic context.
`new_context` is a string to use as the :ref:`dynamic context
<dynamic_contexts>` label for collected data. If a :ref:`static
context <static_contexts>` is in use, the static and dynamic context
labels will be joined together with a pipe character.
Coverage collection must be started already.
.. versionadded:: 5.0
"""
if not self._started: # pragma: part started
raise CoverageException(
"Cannot switch context, coverage is not started")
if self._collector.should_start_context:
self._warn("Conflicting dynamic contexts",
slug="dynamic-conflict",
once=True)
self._collector.switch_context(new_context)
def clear_exclude(self, which='exclude'):
"""Clear the exclude list."""
self._init()
setattr(self.config, which + "_list", [])
self._exclude_regex_stale()
def exclude(self, regex, which='exclude'):
"""Exclude source lines from execution consideration.
A number of lists of regular expressions are maintained. Each list
selects lines that are treated differently during reporting.
`which` determines which list is modified. The "exclude" list selects
lines that are not considered executable at all. The "partial" list
indicates lines with branches that are not taken.
`regex` is a regular expression. The regex is added to the specified
list. If any of the regexes in the list is found in a line, the line
is marked for special treatment during reporting.
"""
self._init()
excl_list = getattr(self.config, which + "_list")
excl_list.append(regex)
self._exclude_regex_stale()
def _exclude_regex_stale(self):
"""Drop all the compiled exclusion regexes, a list was modified."""
self._exclude_re.clear()
def _exclude_regex(self, which):
"""Return a compiled regex for the given exclusion list."""
if which not in self._exclude_re:
excl_list = getattr(self.config, which + "_list")
self._exclude_re[which] = join_regex(excl_list)
return self._exclude_re[which]
def get_exclude_list(self, which='exclude'):
"""Return a list of excluded regex patterns.
`which` indicates which list is desired. See :meth:`exclude` for the
lists that are available, and their meaning.
"""
self._init()
return getattr(self.config, which + "_list")
def save(self):
"""Save the collected coverage data to the data file."""
data = self.get_data()
data.write()
def combine(self, data_paths=None, strict=False):
"""Combine together a number of similarly-named coverage data files.
All coverage data files whose name starts with `data_file` (from the
coverage() constructor) will be read, and combined together into the
current measurements.
`data_paths` is a list of files or directories from which data should
be combined. If no list is passed, then the data files from the
directory indicated by the current data file (probably the current
directory) will be combined.
If `strict` is true, then it is an error to attempt to combine when
there are no data files to combine.
.. versionadded:: 4.0
The `data_paths` parameter.
.. versionadded:: 4.3
The `strict` parameter.
"""
self._init()
self._init_data(suffix=None)
self._post_init()
self.get_data()
aliases = None
if self.config.paths:
aliases = PathAliases()
for paths in self.config.paths.values():
result = paths[0]
for pattern in paths[1:]:
aliases.add(pattern, result)
combine_parallel_data(self._data,
aliases=aliases,
data_paths=data_paths,
strict=strict)
def get_data(self):
"""Get the collected data.
Also warn about various problems collecting data.
Returns a :class:`coverage.CoverageData`, the collected coverage data.
.. versionadded:: 4.0
"""
self._init()
self._init_data(suffix=None)
self._post_init()
for plugin in self._plugins:
if not plugin._coverage_enabled:
self._collector.plugin_was_disabled(plugin)
if self._collector and self._collector.flush_data():
self._post_save_work()
return self._data
def _post_save_work(self):
"""After saving data, look for warnings, post-work, etc.
Warn about things that should have happened but didn't.
Look for unexecuted files.
"""
# If there are still entries in the source_pkgs_unmatched list,
# then we never encountered those packages.
if self._warn_unimported_source:
self._inorout.warn_unimported_source()
# Find out if we got any data.
if not self._data and self._warn_no_data:
self._warn("No data was collected.", slug="no-data-collected")
# Touch all the files that could have executed, so that we can
# mark completely unexecuted files as 0% covered.
if self._data is not None:
file_paths = collections.defaultdict(list)
for file_path, plugin_name in self._inorout.find_possibly_unexecuted_files(
):
file_path = self._file_mapper(file_path)
file_paths[plugin_name].append(file_path)
for plugin_name, paths in file_paths.items():
self._data.touch_files(paths, plugin_name)
if self.config.note:
self._warn("The '[run] note' setting is no longer supported.")
# Backward compatibility with version 1.
def analysis(self, morf):
"""Like `analysis2` but doesn't return excluded line numbers."""
f, s, _, m, mf = self.analysis2(morf)
return f, s, m, mf
def analysis2(self, morf):
"""Analyze a module.
`morf` is a module or a file name. It will be analyzed to determine
its coverage statistics. The return value is a 5-tuple:
* The file name for the module.
* A list of line numbers of executable statements.
* A list of line numbers of excluded statements.
* A list of line numbers of statements not run (missing from
execution).
* A readable formatted string of the missing line numbers.
The analysis uses the source file itself and the current measured
coverage data.
"""
analysis = self._analyze(morf)
return (
analysis.filename,
sorted(analysis.statements),
sorted(analysis.excluded),
sorted(analysis.missing),
analysis.missing_formatted(),
)
def _analyze(self, it):
"""Analyze a single morf or code unit.
Returns an `Analysis` object.
"""
# All reporting comes through here, so do reporting initialization.
self._init()
Numbers.set_precision(self.config.precision)
self._post_init()
data = self.get_data()
if not isinstance(it, FileReporter):
it = self._get_file_reporter(it)
return Analysis(data, it, self._file_mapper)
def _get_file_reporter(self, morf):
"""Get a FileReporter for a module or file name."""
plugin = None
file_reporter = "python"
if isinstance(morf, string_class):
mapped_morf = self._file_mapper(morf)
plugin_name = self._data.file_tracer(mapped_morf)
if plugin_name:
plugin = self._plugins.get(plugin_name)
if plugin:
file_reporter = plugin.file_reporter(mapped_morf)
if file_reporter is None:
raise CoverageException(
"Plugin %r did not provide a file reporter for %r."
% (plugin._coverage_plugin_name, morf))
if file_reporter == "python":
file_reporter = PythonFileReporter(morf, self)
return file_reporter
def _get_file_reporters(self, morfs=None):
"""Get a list of FileReporters for a list of modules or file names.
For each module or file name in `morfs`, find a FileReporter. Return
the list of FileReporters.
If `morfs` is a single module or file name, this returns a list of one
FileReporter. If `morfs` is empty or None, then the list of all files
measured is used to find the FileReporters.
"""
if not morfs:
morfs = self._data.measured_files()
# Be sure we have a collection.
if not isinstance(morfs, (list, tuple, set)):
morfs = [morfs]
file_reporters = [self._get_file_reporter(morf) for morf in morfs]
return file_reporters
def report(self,
morfs=None,
show_missing=None,
ignore_errors=None,
file=None,
omit=None,
include=None,
skip_covered=None,
contexts=None,
skip_empty=None,
precision=None,
sort=None):
"""Write a textual summary report to `file`.
Each module in `morfs` is listed, with counts of statements, executed
statements, missing statements, and a list of lines missed.
If `show_missing` is true, then details of which lines or branches are
missing will be included in the report. If `ignore_errors` is true,
then a failure while reporting a single file will not stop the entire
report.
`file` is a file-like object, suitable for writing.
`include` is a list of file name patterns. Files that match will be
included in the report. Files matching `omit` will not be included in
the report.
If `skip_covered` is true, don't report on files with 100% coverage.
If `skip_empty` is true, don't report on empty files (those that have
no statements).
`contexts` is a list of regular expressions. Only data from
:ref:`dynamic contexts <dynamic_contexts>` that match one of those
expressions (using :func:`re.search <python:re.search>`) will be
included in the report.
`precision` is the number of digits to display after the decimal
point for percentages.
All of the arguments default to the settings read from the
:ref:`configuration file <config>`.
Returns a float, the total percentage covered.
.. versionadded:: 4.0
The `skip_covered` parameter.
.. versionadded:: 5.0
The `contexts` and `skip_empty` parameters.
.. versionadded:: 5.2
The `precision` parameter.
"""
with override_config(self,
ignore_errors=ignore_errors,
report_omit=omit,
report_include=include,
show_missing=show_missing,
skip_covered=skip_covered,
report_contexts=contexts,
skip_empty=skip_empty,
precision=precision,
sort=sort):
reporter = SummaryReporter(self)
return reporter.report(morfs, outfile=file)
def annotate(
self,
morfs=None,
directory=None,
ignore_errors=None,
omit=None,
include=None,
contexts=None,
):
"""Annotate a list of modules.
Each module in `morfs` is annotated. The source is written to a new
file, named with a ",cover" suffix, with each line prefixed with a
marker to indicate the coverage of the line. Covered lines have ">",
excluded lines have "-", and missing lines have "!".
See :meth:`report` for other arguments.
"""
with override_config(
self,
ignore_errors=ignore_errors,
report_omit=omit,
report_include=include,
report_contexts=contexts,
):
reporter = AnnotateReporter(self)
reporter.report(morfs, directory=directory)
def html_report(
self,
morfs=None,
directory=None,
ignore_errors=None,
omit=None,
include=None,
extra_css=None,
title=None,
skip_covered=None,
show_contexts=None,
contexts=None,
skip_empty=None,
precision=None,
):
"""Generate an HTML report.
The HTML is written to `directory`. The file "index.html" is the
overview starting point, with links to more detailed pages for
individual modules.
`extra_css` is a path to a file of other CSS to apply on the page.
It will be copied into the HTML directory.
`title` is a text string (not HTML) to use as the title of the HTML
report.
See :meth:`report` for other arguments.
Returns a float, the total percentage covered.
.. note::
The HTML report files are generated incrementally based on the
source files and coverage results. If you modify the report files,
the changes will not be considered. You should be careful about
changing the files in the report folder.
"""
with override_config(
self,
ignore_errors=ignore_errors,
report_omit=omit,
report_include=include,
html_dir=directory,
extra_css=extra_css,
html_title=title,
html_skip_covered=skip_covered,
show_contexts=show_contexts,
report_contexts=contexts,
html_skip_empty=skip_empty,
precision=precision,
):
reporter = HtmlReporter(self)
return reporter.report(morfs)
def xml_report(
self,
morfs=None,
outfile=None,
ignore_errors=None,
omit=None,
include=None,
contexts=None,
skip_empty=None,
):
"""Generate an XML report of coverage results.
The report is compatible with Cobertura reports.
Each module in `morfs` is included in the report. `outfile` is the
path to write the file to, "-" will write to stdout.
See :meth:`report` for other arguments.
Returns a float, the total percentage covered.
"""
with override_config(
self,
ignore_errors=ignore_errors,
report_omit=omit,
report_include=include,
xml_output=outfile,
report_contexts=contexts,
skip_empty=skip_empty,
):
return render_report(self.config.xml_output, XmlReporter(self),
morfs)
def json_report(self,
morfs=None,
outfile=None,
ignore_errors=None,
omit=None,
include=None,
contexts=None,
pretty_print=None,
show_contexts=None):
"""Generate a JSON report of coverage results.
Each module in `morfs` is included in the report. `outfile` is the
path to write the file to, "-" will write to stdout.
See :meth:`report` for other arguments.
Returns a float, the total percentage covered.
.. versionadded:: 5.0
"""
with override_config(self,
ignore_errors=ignore_errors,
report_omit=omit,
report_include=include,
json_output=outfile,
report_contexts=contexts,
json_pretty_print=pretty_print,
json_show_contexts=show_contexts):
return render_report(self.config.json_output, JsonReporter(self),
morfs)
def sys_info(self):
"""Return a list of (key, value) pairs showing internal information."""
import coverage as covmod
self._init()
self._post_init()
def plugin_info(plugins):
"""Make an entry for the sys_info from a list of plug-ins."""
entries = []
for plugin in plugins:
entry = plugin._coverage_plugin_name
if not plugin._coverage_enabled:
entry += " (disabled)"
entries.append(entry)
return entries
info = [
('version', covmod.__version__),
('coverage', covmod.__file__),
('tracer',
self._collector.tracer_name() if self._collector else "-none-"),
('CTracer', 'available' if CTracer else "unavailable"),
('plugins.file_tracers', plugin_info(self._plugins.file_tracers)),
('plugins.configurers', plugin_info(self._plugins.configurers)),
('plugins.context_switchers',
plugin_info(self._plugins.context_switchers)),
('configs_attempted', self.config.attempted_config_files),
('configs_read', self.config.config_files_read),
('config_file', self.config.config_file),
('config_contents', repr(self.config._config_contents)
if self.config._config_contents else '-none-'),
('data_file', self._data.data_filename()
if self._data is not None else "-none-"),
('python', sys.version.replace('\n', '')),
('platform', platform.platform()),
('implementation', platform.python_implementation()),
('executable', sys.executable),
('def_encoding', sys.getdefaultencoding()),
('fs_encoding', sys.getfilesystemencoding()),
('pid', os.getpid()),
('cwd', os.getcwd()),
('path', sys.path),
('environment',
sorted(("%s = %s" % (k, v)) for k, v in iitems(os.environ)
if any(slug in k for slug in ("COV", "PY")))),
('command_line', " ".join(getattr(sys, 'argv', ['-none-']))),
]
if self._inorout:
info.extend(self._inorout.sys_info())
info.extend(CoverageData.sys_info())
return info
