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# ``twisted`.`trial`.`reporter`.`Reporter``

class documentation

`class Reporter(TestResult): (source)`

Known subclasses: `twisted.trial.reporter.MinimalReporter`, `twisted.trial.reporter.TextReporter`, `twisted.trial.reporter.TreeReporter`, `twisted.trial.reporter.VerboseTextReporter`

Implements interfaces: `twisted.trial.itrial.IReporter`

View In Hierarchy

A basic `TestResult` with support for writing to a stream.

Method | `__init__` | Undocumented
Method | `addError` | Called when a test raises an error. If `realtime` is set, then it prints the error to the stream.
Method | `addFailure` | Called when a test fails. If `realtime` is set, then it prints the error to the stream.
Method | `cleanupErrors` | Undocumented
Method | `done` | Summarize the result of the test run.
Method | `startTest` | Called when a test begins to run. Records the time when it was first called and resets the warning cache.
Method | `upDownError` | Undocumented
Instance Variable | `realtime` | Undocumented
Instance Variable | `tbformat` | Undocumented
Method | `_formatFailureTraceback` | Undocumented
Method | `_getSummary` | Return a formatted count of tests status results.
Method | `_groupResults` | Group tests together based on their results.
Method | `_observeWarnings` | Observe warning events and write them to `self._stream`.
Method | `_printErrors` | Print all of the non-success results to the stream in full.
Method | `_printExpectedFailure` | Undocumented
Method | `_printResults` | Print a group of errors to the stream.
Method | `_printSummary` | Print a line summarising the test results to the stream.
Method | `_printUnexpectedSuccess` | Undocumented
Method | `_trimFrames` | Trim frames to remove internal paths.
Method | `_write` | Safely write to the reporter's stream.
Method | `_writeln` | Safely write a line to the reporter's stream. Newline is appended to the format string.
Class Variable | `_doubleSeparator` | Undocumented
Class Variable | `_separator` | Undocumented
Instance Variable | `_publisher` | The log publisher which will be observed for warning events.
Instance Variable | `_startTime` | The time when the first test was started. It defaults to `None`, which means that no test was actually launched.
Instance Variable | `_stream` | Undocumented
Instance Variable | `_warningCache` | A `set` of tuples of warning message (file, line, text, category) which have already been written to the output stream during the currently executing test. This is used to avoid writing duplicates of the same warning to the output stream.

Inherited from `TestResult`:

Method | `__repr__` | Undocumented
Method | `addExpectedFailure` | Report that the given test failed, and was expected to do so.
Method | `addSkip` | Report that the given test was skipped.
Method | `addSuccess` | Report that the given test succeeded.
Method | `addUnexpectedSuccess` | Report that the given test succeeded against expectations.
Method | `stopTest` | This must be called after the given test is completed.
Method | `wasSuccessful` | Report whether or not this test suite was successful or not.
Instance Variable | `expectedFailures` | Undocumented
Instance Variable | `skips` | Undocumented
Instance Variable | `successes` | count the number of successes achieved by the test run.
Instance Variable | `unexpectedSuccesses` | Undocumented
Method | `_getFailure` | Convert a `sys.exc_info()`-style tuple to a `Failure`, if necessary.
Method | `_getTime` | Undocumented
Constant | `_DEFAULT_TODO` | Undocumented
Instance Variable | `_lastTime` | Undocumented
Instance Variable | `_testStarted` | Undocumented
Instance Variable | `_timings` | Undocumented

def __init__(self, stream=sys.stdout, tbformat='default', realtime=False, publisher=None): (source)
overrides `twisted.trial.reporter.TestResult.__init__`
overridden in `twisted.trial.reporter.TreeReporter`

Undocumented

def addError(self, test, error): (source)
from `twisted.trial.itrial.IReporter`
overrides `twisted.trial.reporter.TestResult.addError`
overridden in `twisted.trial.reporter.TextReporter`, `twisted.trial.reporter.TreeReporter`, `twisted.trial.reporter.VerboseTextReporter`

Called when a test raises an error. If `realtime` is set, then it prints the error to the stream.

Parameters
test | `ITestCase` that raised the error.
error | `failure.Failure` containing the error.

def addFailure(self, test, fail): (source)
from `twisted.trial.itrial.IReporter`
overrides `twisted.trial.reporter.TestResult.addFailure`
overridden in `twisted.trial.reporter.TextReporter`, `twisted.trial.reporter.TreeReporter`, `twisted.trial.reporter.VerboseTextReporter`

Called when a test fails. If `realtime` is set, then it prints the error to the stream.

Parameters
test | `ITestCase` that failed.
fail | `failure.Failure` containing the error.

def cleanupErrors(self, errs): (source)
overridden in `twisted.trial.reporter.TreeReporter`

Undocumented

def done(self): (source)
from `twisted.trial.itrial.IReporter`
overrides `twisted.trial.reporter.TestResult.done`

Summarize the result of the test run.

The summary includes a report of all of the errors, todos, skips and so forth that occurred during the run. It also includes the number of tests that were run and how long it took to run them (not including load time).

Expects that `_printErrors`, `_writeln`, `_write`, `_printSummary` and `_separator` are all implemented.

def startTest(self, test): (source)
from `twisted.trial.itrial.IReporter`
overrides `twisted.trial.reporter.TestResult.startTest`
overridden in `twisted.trial.reporter.TreeReporter`, `twisted.trial.reporter.VerboseTextReporter`

Called when a test begins to run. Records the time when it was first called and resets the warning cache.

Parameters
test | `ITestCase`

def upDownError(self, method, error, warn=True, printStatus=True): (source)
overridden in `twisted.trial.reporter.TreeReporter`

Undocumented

realtime = (source)

Undocumented

tbformat = (source)

Undocumented

def _formatFailureTraceback(self, fail): (source)

Undocumented

def _getSummary(self): (source)

Return a formatted count of tests status results.

def _groupResults(self, results, formatter): (source)

Group tests together based on their results.

Parameters
results | An iterable of tuples of two or more elements. The first element of each tuple is a test case. The remaining elements describe the outcome of that test case.
formatter | A callable which turns a test case result into a string. The elements after the first of the tuples in `results` will be passed as positional arguments to `formatter`.
Returns
A `list` of two-tuples. The first element of each tuple is a unique string describing one result from at least one of the test cases in `results`. The second element is a list of the test cases which had that result.

def _observeWarnings(self, event): (source)

Observe warning events and write them to `self._stream`.

This method is a log observer which will be registered with `self._publisher.addObserver`.

Parameters
event | A `dict` from the logging system. If it has a `'warning'` key, a logged warning will be extracted from it and possibly written to `self.stream`.

def _printErrors(self): (source)
overridden in `twisted.trial.reporter.MinimalReporter`

Print all of the non-success results to the stream in full.

def _printExpectedFailure(self, error, todo): (source)

Undocumented

def _printResults(self, flavor, errors, formatter): (source)

Print a group of errors to the stream.

Parameters
flavor | A string indicating the kind of error (e.g. 'TODO').
errors | A list of errors, often `failure.Failure`s, but sometimes 'todo' errors.
formatter | A callable that knows how to format the errors.

def _printSummary(self): (source)
overridden in `twisted.trial.reporter.MinimalReporter`, `twisted.trial.reporter.TreeReporter`

Print a line summarising the test results to the stream.

def _printUnexpectedSuccess(self, todo): (source)

Undocumented

def _trimFrames(self, frames): (source)

Trim frames to remove internal paths.

When a `SynchronousTestCase` method fails synchronously, the stack looks like this:

- [0]: `SynchronousTestCase._run`
- [1]: `util.runWithWarningsSuppressed`
- [2:-2]: code in the test method which failed
- [-1]: `_synctest.fail`

When a `TestCase` method fails synchronously, the stack looks like this:

- [0]: `defer.maybeDeferred`
- [1]: `utils.runWithWarningsSuppressed`
- [2]: `utils.runWithWarningsSuppressed`
- [3:-2]: code in the test method which failed
- [-1]: `_synctest.fail`

When a method fails inside a `Deferred` (i.e., when the test method returns a `Deferred`, and that `Deferred`'s errback fires), the stack captured inside the resulting `Failure` looks like this:

- [0]: `defer.Deferred._runCallbacks`
- [1:-2]: code in the testmethod which failed
- [-1]: `_synctest.fail`

As a result, we want to trim either [maybeDeferred, runWWS, runWWS] or [Deferred._runCallbacks] or [SynchronousTestCase._run, runWWS] from the front, and trim the [unittest.fail] from the end.

There is also another case, when the test method is badly defined and contains extra arguments.

If it doesn't recognize one of these cases, it just returns the original frames.

Parameters
frames | The `list` of frames from the test failure.
Returns
The `list` of frames to display.

def _write(self, format, *args): (source)
overridden in `twisted.trial.reporter.TreeReporter`

Safely write to the reporter's stream.

Parameters
format | A format string to write.
*args | The arguments for the format string.

def _writeln(self, format, *args): (source)

Safely write a line to the reporter's stream. Newline is appended to the format string.

Parameters
format | A format string to write.
*args | The arguments for the format string.

_doubleSeparator = (source)

Undocumented

_separator = (source)

Undocumented

_publisher: `twisted.python.log.LogPublisher` = (source)

The log publisher which will be observed for warning events.

_startTime: `float` or `None` = (source)

The time when the first test was started. It defaults to `None`, which means that no test was actually launched.

_stream = (source)

Undocumented

_warningCache: `set` = (source)

A `set` of tuples of warning message (file, line, text, category) which have already been written to the output stream during the currently executing test. This is used to avoid writing duplicates of the same warning to the output stream.