Getting Python's unittest results in a tearDown() method

Is it possible to get the results of a test (i.e. whether all 开发者_如何学JAVAassertions have passed) in a tearDown() method? I'm running Selenium scripts, and I'd like to do some reporting from inside tearDown(), however I don't know if this is possible.

---

As of March 2022 this answer is updated to support Python versions between 3.4 and 3.11 (including the newest development Python version). Classification of errors / failures is the same that is used in the output unittest. It works without any modification of code before tearDown(). It correctly recognizes decorators skipIf() and expectedFailure. It is compatible also with pytest.

Code:

import unittest

class MyTest(unittest.TestCase):
    def tearDown(self):
        if hasattr(self._outcome, 'errors'):
            # Python 3.4 - 3.10  (These two methods have no side effects)
            result = self.defaultTestResult()
            self._feedErrorsToResult(result, self._outcome.errors)
        else:
            # Python 3.11+
            result = self._outcome.result
        ok = all(test != self for test, text in result.errors + result.failures)

        # Demo output:  (print short info immediately - not important)
        if ok:
            print('\nOK: %s' % (self.id(),))
        for typ, errors in (('ERROR', result.errors), ('FAIL', result.failures)):
            for test, text in errors:
                if test is self:
                    #  the full traceback is in the variable `text`
                    msg = [x for x in text.split('\n')[1:]
                           if not x.startswith(' ')][0]
                    print("\n\n%s: %s\n     %s" % (typ, self.id(), msg))

If you don't need the exception info then the second half can be removed. If you want also the tracebacks then use the whole variable text instead of msg. It only can't recognize an unexpected success in a expectedFailure block

Example test methods:

    def test_error(self):
        self.assertEqual(1 / 0, 1)

    def test_fail(self):
        self.assertEqual(2, 1)

    def test_success(self):
        self.assertEqual(1, 1)

Example output:

$ python3 -m unittest test

ERROR: q.MyTest.test_error
     ZeroDivisionError: division by zero
E

FAIL: q.MyTest.test_fail
     AssertionError: 2 != 1
F

OK: q.MyTest.test_success
.
======================================================================
... skipped the usual output from unittest with tracebacks ...
...
Ran 3 tests in 0.001s

FAILED (failures=1, errors=1)

Complete code including expectedFailure decorator example

EDIT: When I updated this solution to Python 3.11, I dropped everything related to old Python < 3.4 and also many minor notes.

---

If you take a look at the implementation of unittest.TestCase.run, you can see that all test results are collected in the result object (typically a unittest.TestResult instance) passed as argument. No result status is left in the unittest.TestCase object.

So there isn't much you can do in the unittest.TestCase.tearDown method unless you mercilessly break the elegant decoupling of test cases and test results with something like this:

import unittest

class MyTest(unittest.TestCase):

    currentResult = None # Holds last result object passed to run method

    def setUp(self):
        pass

    def tearDown(self):
        ok = self.currentResult.wasSuccessful()
        errors = self.currentResult.errors
        failures = self.currentResult.failures
        print ' All tests passed so far!' if ok else \
                ' %d errors and %d failures so far' % \
                (len(errors), len(failures))

    def run(self, result=None):
        self.currentResult = result # Remember result for use in tearDown
        unittest.TestCase.run(self, result) # call superclass run method

    def test_onePlusOneEqualsTwo(self):
        self.assertTrue(1 + 1 == 2) # Succeeds

    def test_onePlusOneEqualsThree(self):
        self.assertTrue(1 + 1 == 3) # Fails

    def test_onePlusNoneIsNone(self):
        self.assertTrue(1 + None is None) # Raises TypeError

if __name__ == '__main__':
    unittest.main()

This works for Python 2.6 - 3.3 (modified for new Python below).

---

CAVEAT: I have no way of double checking the following theory at the moment, being away from a dev box. So this may be a shot in the dark.

Perhaps you could check the return value of sys.exc_info() inside your tearDown() method, if it returns (None, None, None), you know the test case succeeded. Otherwise, you could use returned tuple to interrogate the exception object.

See sys.exc_info documentation.

Another more explicit approach is to write a method decorator that you could slap onto all your test case methods that require this special handling. This decorator can intercept assertion exceptions and based on that modify some state in self allowing your tearDown method to learn what's up.

@assertion_tracker
def test_foo(self):
    # some test logic

---

It depends what kind of reporting you'd like to produce.

In case you'd like to do some actions on failure (such as generating a screenshots), instead of using tearDown(), you may achieve that by overriding failureException.

For example:

@property
def failureException(self):
    class MyFailureException(AssertionError):
        def __init__(self_, *args, **kwargs):
            screenshot_dir = 'reports/screenshots'
            if not os.path.exists(screenshot_dir):
                os.makedirs(screenshot_dir)
            self.driver.save_screenshot('{0}/{1}.png'.format(screenshot_dir, self.id()))
            return super(MyFailureException, self_).__init__(*args, **kwargs)
    MyFailureException.__name__ = AssertionError.__name__
    return MyFailureException

---

If you are using Python 2 you can use the method _resultForDoCleanups. This method return a TextTestResult object:

<unittest.runner.TextTestResult run=1 errors=0 failures=0>

You can use this object to check the result of your tests:

def tearDown(self):
    if self._resultForDoCleanups.failures:
        ...
    elif self._resultForDoCleanups.errors:
        ...
    else:
        # Success

If you are using Python 3 you can use _outcomeForDoCleanups:

def tearDown(self):
    if not self._outcomeForDoCleanups.success:
        ...

---

Following on from amatellanes' answer, if you're on Python 3.4, you can't use _outcomeForDoCleanups. Here's what I managed to hack together:

def _test_has_failed(self):
    for method, error in self._outcome.errors:
        if error:
            return True
    return False

It is yucky, but it seems to work.

---

Here's a solution for those of us who are uncomfortable using solutions that rely on unittest internals:

First, we create a decorator that will set a flag on the TestCase instance to determine whether or not the test case failed or passed:

import unittest
import functools

def _tag_error(func):
    """Decorates a unittest test function to add failure information to the TestCase."""

    @functools.wraps(func)
    def decorator(self, *args, **kwargs):
        """Add failure information to `self` when `func` raises an exception."""
        self.test_failed = False
        try:
            func(self, *args, **kwargs)
        except unittest.SkipTest:
            raise
        except Exception:  # pylint: disable=broad-except
            self.test_failed = True
            raise  # re-raise the error with the original traceback.

    return decorator

This decorator is actually pretty simple. It relies on the fact that unittest detects failed tests via Exceptions. As far as I'm aware, the only special exception that needs to be handled is unittest.SkipTest (which does not indicate a test failure). All other exceptions indicate test failures so we mark them as such when they bubble up to us.

We can now use this decorator directly:

class MyTest(unittest.TestCase):
    test_failed = False

    def tearDown(self):
        super(MyTest, self).tearDown()
        print(self.test_failed)

    @_tag_error
    def test_something(self):
        self.fail('Bummer')

---

It's going to get really annoying writing this decorator all the time. Is there a way we can simplify? Yes there is!^* We can write a metaclass to handle applying the decorator for us:

class _TestFailedMeta(type):
    """Metaclass to decorate test methods to append error information to the TestCase instance."""
    def __new__(cls, name, bases, dct):
        for name, prop in dct.items():
            # assume that TestLoader.testMethodPrefix hasn't been messed with -- otherwise, we're hosed.
            if name.startswith('test') and callable(prop):
                dct[name] = _tag_error(prop)

        return super(_TestFailedMeta, cls).__new__(cls, name, bases, dct)

Now we apply this to our base TestCase subclass and we're all set:

import six  # For python2.x/3.x compatibility

class BaseTestCase(six.with_metaclass(_TestFailedMeta, unittest.TestCase)):
    """Base class for all our other tests.

    We don't really need this, but it demonstrates that the
    metaclass gets applied to all subclasses too.
    """


class MyTest(BaseTestCase):

    def tearDown(self):
        super(MyTest, self).tearDown()
        print(self.test_failed)

    def test_something(self):
        self.fail('Bummer')

There are likely a number of cases that this doesn't handle properly. For example, it does not correctly detect failed subtests or expected failures. I'd be interested in other failure modes of this, so if you find a case that I'm not handling properly, let me know in the comments and I'll look into it.

---

^*If there wasn't an easier way, I wouldn't have made _tag_error a private function ;-)

---

I think the proper answer to your question is that there isn't a clean way to get test results in tearDown(). Most of the answers here involve accessing some private parts of the Python unittest module and in general feel like workarounds. I'd strongly suggest avoiding these since the test results and test cases are decoupled and you should not work against that.

If you are in love with clean code (like I am) I think what you should do instead is instantiating your TestRunner with your own TestResult class. Then you could add whatever reporting you wanted by overriding these methods:

addError(test, err)
Called when the test case test raises an unexpected exception. err is a tuple of the form returned by sys.exc_info(): (type, value, traceback).

The default implementation appends a tuple (test, formatted_err) to the instance’s errors attribute, where formatted_err is a formatted traceback derived from err.

addFailure(test, err)
Called when the test case test signals a failure. err is a tuple of the form returned by sys.exc_info(): (type, value, traceback).

The default implementation appends a tuple (test, formatted_err) to the instance’s failures attribute, where formatted_err is a formatted traceback derived from err.

addSuccess(test)
Called when the test case test succeeds.

The default implementation does nothing.

---

Python 2.7.

You can also get result after unittest.main():

t = unittest.main(exit=False)
print t.result

Or use suite:

suite.addTests(tests)
result = unittest.result.TestResult()
suite.run(result)
print result

---

Inspired by scoffey’s answer, I decided to take mercilessnes to the next level, and have come up with the following.

It works in both vanilla unittest, and also when run via nosetests, and also works in Python versions 2.7, 3.2, 3.3, and 3.4 (I did not specifically test 3.0, 3.1, or 3.5, as I don’t have these installed at the moment, but if I read the source code correctly, it should work in 3.5 as well):

#! /usr/bin/env python

from __future__ import unicode_literals
import logging
import os
import sys
import unittest


# Log file to see squawks during testing
formatter = logging.Formatter(fmt='%(levelname)-8s %(name)s: %(message)s')
log_file = os.path.splitext(os.path.abspath(__file__))[0] + '.log'
handler = logging.FileHandler(log_file)
handler.setFormatter(formatter)
logging.root.addHandler(handler)
logging.root.setLevel(logging.DEBUG)
log = logging.getLogger(__name__)


PY = tuple(sys.version_info)[:3]


class SmartTestCase(unittest.TestCase):

    """Knows its state (pass/fail/error) by the time its tearDown is called."""

    def run(self, result):
        # Store the result on the class so tearDown can behave appropriately
        self.result = result.result if hasattr(result, 'result') else result
        if PY >= (3, 4, 0):
            self._feedErrorsToResultEarly = self._feedErrorsToResult
            self._feedErrorsToResult = lambda *args, **kwargs: None  # no-op
        super(SmartTestCase, self).run(result)

    @property
    def errored(self):
        if (3, 0, 0) <= PY < (3, 4, 0):
            return bool(self._outcomeForDoCleanups.errors)
        return self.id() in [case.id() for case, _ in self.result.errors]

    @property
    def failed(self):
        if (3, 0, 0) <= PY < (3, 4, 0):
            return bool(self._outcomeForDoCleanups.failures)
        return self.id() in [case.id() for case, _ in self.result.failures]

    @property
    def passed(self):
        return not (self.errored or self.failed)

    def tearDown(self):
        if PY >= (3, 4, 0):
            self._feedErrorsToResultEarly(self.result, self._outcome.errors)


class TestClass(SmartTestCase):

    def test_1(self):
        self.assertTrue(True)

    def test_2(self):
        self.assertFalse(True)

    def test_3(self):
        self.assertFalse(False)

    def test_4(self):
        self.assertTrue(False)

    def test_5(self):
        self.assertHerp('Derp')

    def tearDown(self):
        super(TestClass, self).tearDown()
        log.critical('---- RUNNING {} ... -----'.format(self.id()))
        if self.errored:
            log.critical('----- ERRORED -----')
        elif self.failed:
            log.critical('----- FAILED -----')
        else:
            log.critical('----- PASSED -----')


if __name__ == '__main__':
    unittest.main()

When run with unittest:

$ ./test.py -v
test_1 (__main__.TestClass) ... ok
test_2 (__main__.TestClass) ... FAIL
test_3 (__main__.TestClass) ... ok
test_4 (__main__.TestClass) ... FAIL
test_5 (__main__.TestClass) ... ERROR
[…]

$ cat ./test.log
CRITICAL __main__: ---- RUNNING __main__.TestClass.test_1 ... -----
CRITICAL __main__: ----- PASSED -----
CRITICAL __main__: ---- RUNNING __main__.TestClass.test_2 ... -----
CRITICAL __main__: ----- FAILED -----
CRITICAL __main__: ---- RUNNING __main__.TestClass.test_3 ... -----
CRITICAL __main__: ----- PASSED -----
CRITICAL __main__: ---- RUNNING __main__.TestClass.test_4 ... -----
CRITICAL __main__: ----- FAILED -----
CRITICAL __main__: ---- RUNNING __main__.TestClass.test_5 ... -----
CRITICAL __main__: ----- ERRORED -----

When run with nosetests:

$ nosetests ./test.py -v
test_1 (test.TestClass) ... ok
test_2 (test.TestClass) ... FAIL
test_3 (test.TestClass) ... ok
test_4 (test.TestClass) ... FAIL
test_5 (test.TestClass) ... ERROR

$ cat ./test.log
CRITICAL test: ---- RUNNING test.TestClass.test_1 ... -----
CRITICAL test: ----- PASSED -----
CRITICAL test: ---- RUNNING test.TestClass.test_2 ... -----
CRITICAL test: ----- FAILED -----
CRITICAL test: ---- RUNNING test.TestClass.test_3 ... -----
CRITICAL test: ----- PASSED -----
CRITICAL test: ---- RUNNING test.TestClass.test_4 ... -----
CRITICAL test: ----- FAILED -----
CRITICAL test: ---- RUNNING test.TestClass.test_5 ... -----
CRITICAL test: ----- ERRORED -----

Background

I started with this:

class SmartTestCase(unittest.TestCase):

    """Knows its state (pass/fail/error) by the time its tearDown is called."""

    def run(self, result):
        # Store the result on the class so tearDown can behave appropriately
        self.result = result.result if hasattr(result, 'result') else result
        super(SmartTestCase, self).run(result)

    @property
    def errored(self):
        return self.id() in [case.id() for case, _ in self.result.errors]

    @property
    def failed(self):
        return self.id() in [case.id() for case, _ in self.result.failures]

    @property
    def passed(self):
        return not (self.errored or self.failed)

However, this only works in Python 2. In Python 3, up to and including 3.3, the control flow appears to have changed a bit: Python 3’s unittest package processes results after calling each test’s tearDown() method… this behavior can be confirmed if we simply add an extra line (or six) to our test class:

@@ -63,6 +63,12 @@
             log.critical('----- FAILED -----')
         else:
             log.critical('----- PASSED -----')
+        log.warning(
+            'ERRORS THUS FAR:\n'
+            + '\n'.join(tc.id() for tc, _ in self.result.errors))
+        log.warning(
+            'FAILURES THUS FAR:\n'
+            + '\n'.join(tc.id() for tc, _ in self.result.failures))


 if __name__ == '__main__':

Then just rerun the tests:

$ python3.3 ./test.py -v
test_1 (__main__.TestClass) ... ok
test_2 (__main__.TestClass) ... FAIL
test_3 (__main__.TestClass) ... ok
test_4 (__main__.TestClass) ... FAIL
test_5 (__main__.TestClass) ... ERROR
[…]

…and you will see that you get this as a result:

CRITICAL __main__: ---- RUNNING __main__.TestClass.test_1 ... -----
CRITICAL __main__: ----- PASSED -----
WARNING  __main__: ERRORS THUS FAR:

WARNING  __main__: FAILURES THUS FAR:

CRITICAL __main__: ---- RUNNING __main__.TestClass.test_2 ... -----
CRITICAL __main__: ----- PASSED -----
WARNING  __main__: ERRORS THUS FAR:

WARNING  __main__: FAILURES THUS FAR:

CRITICAL __main__: ---- RUNNING __main__.TestClass.test_3 ... -----
CRITICAL __main__: ----- PASSED -----
WARNING  __main__: ERRORS THUS FAR:

WARNING  __main__: FAILURES THUS FAR:
__main__.TestClass.test_2
CRITICAL __main__: ---- RUNNING __main__.TestClass.test_4 ... -----
CRITICAL __main__: ----- PASSED -----
WARNING  __main__: ERRORS THUS FAR:

WARNING  __main__: FAILURES THUS FAR:
__main__.TestClass.test_2
CRITICAL __main__: ---- RUNNING __main__.TestClass.test_5 ... -----
CRITICAL __main__: ----- PASSED -----
WARNING  __main__: ERRORS THUS FAR:

WARNING  __main__: FAILURES THUS FAR:
__main__.TestClass.test_2
__main__.TestClass.test_4

Now, compare the above to Python 2’s output:

CRITICAL __main__: ---- RUNNING __main__.TestClass.test_1 ... -----
CRITICAL __main__: ----- PASSED -----
WARNING  __main__: ERRORS THUS FAR:

WARNING  __main__: FAILURES THUS FAR:

CRITICAL __main__: ---- RUNNING __main__.TestClass.test_2 ... -----
CRITICAL __main__: ----- FAILED -----
WARNING  __main__: ERRORS THUS FAR:

WARNING  __main__: FAILURES THUS FAR:
__main__.TestClass.test_2
CRITICAL __main__: ---- RUNNING __main__.TestClass.test_3 ... -----
CRITICAL __main__: ----- PASSED -----
WARNING  __main__: ERRORS THUS FAR:

WARNING  __main__: FAILURES THUS FAR:
__main__.TestClass.test_2
CRITICAL __main__: ---- RUNNING __main__.TestClass.test_4 ... -----
CRITICAL __main__: ----- FAILED -----
WARNING  __main__: ERRORS THUS FAR:

WARNING  __main__: FAILURES THUS FAR:
__main__.TestClass.test_2
__main__.TestClass.test_4
CRITICAL __main__: ---- RUNNING __main__.TestClass.test_5 ... -----
CRITICAL __main__: ----- ERRORED -----
WARNING  __main__: ERRORS THUS FAR:
__main__.TestClass.test_5
WARNING  __main__: FAILURES THUS FAR:
__main__.TestClass.test_2
__main__.TestClass.test_4

Since Python 3 processes errors/failures after the test is torn down, we can’t readily infer the result of a test using result.errors or result.failures in every case. (I think it probably makes more sense architecturally to process a test’s results after tearing it down, however, it does make the perfectly valid use-case of following a different end-of-test procedure depending on a test’s pass/fail status a bit harder to meet…)

Therefore, instead of relying on the overall result object, instead we can reference _outcomeForDoCleanups as others have already mentioned, which contains the result object for the currently running test, and has the necessary errors and failrues attributes, which we can use to infer a test’s status by the time tearDown() has been called:

@@ -3,6 +3,7 @@
 from __future__ import unicode_literals
 import logging
 import os
+import sys
 import unittest


@@ -16,6 +17,9 @@
 log = logging.getLogger(__name__)


+PY = tuple(sys.version_info)[:3]
+
+
 class SmartTestCase(unittest.TestCase):

     """Knows its state (pass/fail/error) by the time its tearDown is called."""
@@ -27,10 +31,14 @@

     @property
     def errored(self):
+        if PY >= (3, 0, 0):
+            return bool(self._outcomeForDoCleanups.errors)
         return self.id() in [case.id() for case, _ in self.result.errors]

     @property
     def failed(self):
+        if PY >= (3, 0, 0):
+            return bool(self._outcomeForDoCleanups.failures)
         return self.id() in [case.id() for case, _ in self.result.failures]

     @property

This adds support for the early versions of Python 3.

As of Python 3.4, however, this private member variable no longer exists, and instead, a new (albeit also private) method was added: _feedErrorsToResult.

This means that for versions 3.4 (and later), if the need is great enough, one can — very hackishly — force one’s way in to make it all work again like it did in version 2…

@@ -27,17 +27,20 @@
     def run(self, result):
         # Store the result on the class so tearDown can behave appropriately
         self.result = result.result if hasattr(result, 'result') else result
+        if PY >= (3, 4, 0):
+            self._feedErrorsToResultEarly = self._feedErrorsToResult
+            self._feedErrorsToResult = lambda *args, **kwargs: None  # no-op
         super(SmartTestCase, self).run(result)

     @property
     def errored(self):
-        if PY >= (3, 0, 0):
+        if (3, 0, 0) <= PY < (3, 4, 0):
             return bool(self._outcomeForDoCleanups.errors)
         return self.id() in [case.id() for case, _ in self.result.errors]

     @property
     def failed(self):
-        if PY >= (3, 0, 0):
+        if (3, 0, 0) <= PY < (3, 4, 0):
             return bool(self._outcomeForDoCleanups.failures)
         return self.id() in [case.id() for case, _ in self.result.failures]

@@ -45,6 +48,10 @@
     def passed(self):
         return not (self.errored or self.failed)

+    def tearDown(self):
+        if PY >= (3, 4, 0):
+            self._feedErrorsToResultEarly(self.result, self._outcome.errors)
+

 class TestClass(SmartTestCase):

@@ -64,6 +71,7 @@
         self.assertHerp('Derp')

     def tearDown(self):
+        super(TestClass, self).tearDown()
         log.critical('---- RUNNING {} ... -----'.format(self.id()))
         if self.errored:
             log.critical('----- ERRORED -----')

…provided, of course, all consumers of this class remember to super(…, self).tearDown() in their respective tearDown methods…

Disclaimer: This is purely educational, don’t try this at home, etc. etc. etc. I’m not particularly proud of this solution, but it seems to work well enough for the time being, and is the best I could hack up after fiddling for an hour or two on a Saturday afternoon…

---

The name of the current test can be retrieved with the unittest.TestCase.id() method. So in tearDown you can check self.id().

The example shows how to:

• find if the current test has an error or failure in errors or failures list
• print the test id with PASS or FAIL or EXCEPTION

The tested example here works with scoffey's nice example.

def tearDown(self):
    result = "PASS"
    #### Find and show result for current test
    # I did not find any nicer/neater way of comparing self.id() with test id stored in errors or failures lists :-7
    id = str(self.id()).split('.')[-1]
    # id() e.g. tup[0]:<__main__.MyTest testMethod=test_onePlusNoneIsNone>
    #           str(tup[0]):"test_onePlusOneEqualsThree (__main__.MyTest)"
    #           str(self.id()) = __main__.MyTest.test_onePlusNoneIsNone
    for tup in self.currentResult.failures:
        if str(tup[0]).startswith(id):
            print ' test %s failure:%s' % (self.id(), tup[1])
            ## DO TEST FAIL ACTION HERE
            result = "FAIL"
    for tup in self.currentResult.errors:
        if str(tup[0]).startswith(id):
            print ' test %s error:%s' % (self.id(), tup[1])
            ## DO TEST EXCEPTION ACTION HERE
            result = "EXCEPTION"

    print "Test:%s Result:%s" % (self.id(), result)

Example of result:

python run_scripts/tut2.py 2>&1
E test __main__.MyTest.test_onePlusNoneIsNone error:Traceback (most recent call last):
  File "run_scripts/tut2.py", line 80, in test_onePlusNoneIsNone
    self.assertTrue(1 + None is None) # raises TypeError
TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'

Test:__main__.MyTest.test_onePlusNoneIsNone Result:EXCEPTION
F test __main__.MyTest.test_onePlusOneEqualsThree failure:Traceback (most recent call last):
  File "run_scripts/tut2.py", line 77, in test_onePlusOneEqualsThree
    self.assertTrue(1 + 1 == 3) # fails
AssertionError: False is not true

Test:__main__.MyTest.test_onePlusOneEqualsThree Result:FAIL
Test:__main__.MyTest.test_onePlusOneEqualsTwo Result:PASS
.
======================================================================
ERROR: test_onePlusNoneIsNone (__main__.MyTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "run_scripts/tut2.py", line 80, in test_onePlusNoneIsNone
    self.assertTrue(1 + None is None) # raises TypeError
TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'

======================================================================
FAIL: test_onePlusOneEqualsThree (__main__.MyTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "run_scripts/tut2.py", line 77, in test_onePlusOneEqualsThree
     self.assertTrue(1 + 1 == 3) # fails
AssertionError: False is not true

----------------------------------------------------------------------
Ran 3 tests in 0.001s

FAILED (failures=1, errors=1)

---

Tested for Python 3.7 - sample code for getting information of failing assertions, but can give an idea of how to deal with errors:

def tearDown(self):
    if self._outcome.errors[1][1] and hasattr(self._outcome.errors[1][1][1], 'actual'):
        print(self._testMethodName)
        print(self._outcome.errors[1][1][1].actual)
        print(self._outcome.errors[1][1][1].expected)

---

In a few words, this gives True if all tests run so far exited with no errors or failures:

class WatheverTestCase(TestCase):

    def tear_down(self):
        return not self._outcome.result.errors and not self._outcome.result.failures

Explore _outcome's properties to access more detailed possibilities.

---

This is simple, makes use of the public API only, and shall work on any python version:

import unittest

class MyTest(unittest.TestCase):
    def defaultTestResult():
        self.lastResult = unittest.result.TestResult()
        return self.lastResult

    ...

---

Python version independent code using global variable

import unittest
global test_case_id
global test_title
global test_result
test_case_id =''
test_title = ''
test_result = ''
class Dummy(unittest.TestCase):
    def setUp(self):
        pass
    def tearDown(self):
        global test_case_id
        global test_title
        global test_result
        self.test_case_id = test_case_id
        self.test_title = test_title
        self.test_result = test_result
        print('Test case id is : ',self.test_case_id)
        print('test title is : ',self.test_title)
        print('Test test result is : ',self.test_result)
    def test_a(self):
        global test_case_id
        global test_title
        global test_result
        test_case_id = 'test1'
        test_title = 'To verify test1'
        test_result=self.assertTrue(True)
    def test_b(self):
        global test_case_id
        global test_title
        global test_result
        test_case_id = 'test2'
        test_title = 'To verify test2'
        test_result=self.assertFalse(False)
if __name__ == "__main__":
    unittest.main()