一文带你搞定自定义unittest中测试用例的名称

本文主要是介绍一文带你搞定自定义unittest中测试用例的名称，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

其实我们都知道在unittest中测试用例的名称都是 用test开头的，那么我们想要去定制化，是否可以实现这个需求呢，本文带你去搞定。

那么我们看下是如何去实现的呢。

首先我们使用的unittest.main()加载运行的测试用例，我们点击main看是否能跳转进去。正常跳转到这个函数里面。\

我们可以看到有一个加载测试用例的\

默认加载的是defaultTestLoader，那么我去看看这里面有没有我们想要的。

\

这里我们可以看到 是一个类，这里有个定义的 test，我们看看。接下来是怎么用的。

那么问我们看下如何实现呢。 首选我们去defaultTestLoader

"""Loading unittests."""

import os
import re
import sys
import traceback
import types
import functools
import warnings
from config import testname
from fnmatch import fnmatch, fnmatchcase
from unittest import case, suite, util

__unittest = True

# what about .pyc (etc)
# we would need to avoid loading the same tests multiple times
# from '.py', *and* '.pyc'
VALID_MODULE_NAME = re.compile(r'[_a-z]\w*\.py$', re.IGNORECASE)


class _FailedTest(case.TestCase):
    _testMethodName = None

    def __init__(self, method_name, exception):
        self._exception = exception
        super(_FailedTest, self).__init__(method_name)

    def __getattr__(self, name):
        if name != self._testMethodName:
            return super(_FailedTest, self).__getattr__(name)
        def testFailure():
            raise self._exception
        return testFailure


def _make_failed_import_test(name, suiteClass):
    message = 'Failed to import test module: %s\n%s' % (
        name, traceback.format_exc())
    return _make_failed_test(name, ImportError(message), suiteClass, message)

def _make_failed_load_tests(name, exception, suiteClass):
    message = 'Failed to call load_tests:\n%s' % (traceback.format_exc(),)
    return _make_failed_test(
        name, exception, suiteClass, message)

def _make_failed_test(methodname, exception, suiteClass, message):
    test = _FailedTest(methodname, exception)
    return suiteClass((test,)), message

def _make_skipped_test(methodname, exception, suiteClass):
    @case.skip(str(exception))
    def testSkipped(self):
        pass
    attrs = {methodname: testSkipped}
    TestClass = type("ModuleSkipped", (case.TestCase,), attrs)
    return suiteClass((TestClass(methodname),))

def _jython_aware_splitext(path):
    if path.lower().endswith('$py.class'):
        return path[:-9]
    return os.path.splitext(path)[0]


class TestLoader(object):
    """
    This class is responsible for loading tests according to various criteria
    and returning them wrapped in a TestSuite
    """
    testMethodPrefix = testname
    sortTestMethodsUsing = staticmethod(util.three_way_cmp)
    testNamePatterns = None
    suiteClass = suite.TestSuite
    _top_level_dir = None

    def __init__(self):
        super(TestLoader, self).__init__()
        self.errors = []
        # Tracks packages which we have called into via load_tests, to
        # avoid infinite re-entrancy.
        self._loading_packages = set()

    def loadTestsFromTestCase(self, testCaseClass):
        """Return a suite of all test cases contained in testCaseClass"""
        if issubclass(testCaseClass, suite.TestSuite):
            raise TypeError("Test cases should not be derived from "
                            "TestSuite. Maybe you meant to derive from "
                            "TestCase?")
        testCaseNames = self.getTestCaseNames(testCaseClass)
        if not testCaseNames and hasattr(testCaseClass, 'runTest'):
            testCaseNames = ['runTest']
        loaded_suite = self.suiteClass(map(testCaseClass, testCaseNames))
        return loaded_suite

    # XXX After Python 3.5, remove backward compatibility hacks for
    # use_load_tests deprecation via *args and **kws.  See issue 16662.
    def loadTestsFromModule(self, module, *args, pattern=None, **kws):
        """Return a suite of all test cases contained in the given module"""
        # This method used to take an undocumented and unofficial
        # use_load_tests argument.  For backward compatibility, we still
        # accept the argument (which can also be the first position) but we
        # ignore it and issue a deprecation warning if it's present.
        if len(args) > 0 or 'use_load_tests' in kws:
            warnings.warn('use_load_tests is deprecated and ignored',
                          DeprecationWarning)
            kws.pop('use_load_tests', None)
        if len(args) > 1:
            # Complain about the number of arguments, but don't forget the
            # required `module` argument.
            complaint = len(args) + 1
            raise TypeError('loadTestsFromModule() takes 1 positional argument but {} were given'.format(complaint))
        if len(kws) != 0:
            # Since the keyword arguments are unsorted (see PEP 468), just
            # pick the alphabetically sorted first argument to complain about,
            # if multiple were given.  At least the error message will be
            # predictable.
            complaint = sorted(kws)[0]
            raise TypeError("loadTestsFromModule() got an unexpected keyword argument '{}'".format(complaint))
        tests = []
        for name in dir(module):
            obj = getattr(module, name)
            if isinstance(obj, type) and issubclass(obj, case.TestCase):
                tests.append(self.loadTestsFromTestCase(obj))

        load_tests = getattr(module, 'load_tests', None)
        tests = self.suiteClass(tests)
        if load_tests is not None:
            try:
                return load_tests(self, tests, pattern)
            except Exception as e:
                error_case, error_message = _make_failed_load_tests(
                    module.__name__, e, self.suiteClass)
                self.errors.append(error_message)
                return error_case
        return tests

    def loadTestsFromName(self, name, module=None):
        """Return a suite of all test cases given a string specifier.

        The name may resolve either to a module, a test case class, a
        test method within a test case class, or a callable object which
        returns a TestCase or TestSuite instance.

        The method optionally resolves the names relative to a given module.
        """
        parts = name.split('.')
        error_case, error_message = None, None
        if module is None:
            parts_copy = parts[:]
            while parts_copy:
                try:
                    module_name = '.'.join(parts_copy)
                    module = __import__(module_name)
                    break
                except ImportError:
                    next_attribute = parts_copy.pop()
                    # Last error so we can give it to the user if needed.
                    error_case, error_message = _make_failed_import_test(
                        next_attribute, self.suiteClass)
                    if not parts_copy:
                        # Even the top level import failed: report that error.
                        self.errors.append(error_message)
                        return error_case
            parts = parts[1:]
        obj = module
        for part in parts:
            try:
                parent, obj = obj, getattr(obj, part)
            except AttributeError as e:
                # We can't traverse some part of the name.
                if (getattr(obj, '__path__', None) is not None
                    and error_case is not None):
                    # This is a package (no __path__ per importlib docs), and we
                    # encountered an error importing something. We cannot tell
                    # the difference between package.WrongNameTestClass and
                    # package.wrong_module_name so we just report the
                    # ImportError - it is more informative.
                    self.errors.append(error_message)
                    return error_case
                else:
                    # Otherwise, we signal that an AttributeError has occurred.
                    error_case, error_message = _make_failed_test(
                        part, e, self.suiteClass,
                        'Failed to access attribute:\n%s' % (
                            traceback.format_exc(),))
                    self.errors.append(error_message)
                    return error_case

        if isinstance(obj, types.ModuleType):
            return self.loadTestsFromModule(obj)
        elif isinstance(obj, type) and issubclass(obj, case.TestCase):
            return self.loadTestsFromTestCase(obj)
        elif (isinstance(obj, types.FunctionType) and
              isinstance(parent, type) and
              issubclass(parent, case.TestCase)):
            name = parts[-1]
            inst = parent(name)
            # static methods follow a different path
            if not isinstance(getattr(inst, name), types.FunctionType):
                return self.suiteClass([inst])
        elif isinstance(obj, suite.TestSuite):
            return obj
        if callable(obj):
            test = obj()
            if isinstance(test, suite.TestSuite):
                return test
            elif isinstance(test, case.TestCase):
                return self.suiteClass([test])
            else:
                raise TypeError("calling %s returned %s, not a test" %
                                (obj, test))
        else:
            raise TypeError("don't know how to make test from: %s" % obj)

    def loadTestsFromNames(self, names, module=None):
        """Return a suite of all test cases found using the given sequence
        of string specifiers. See 'loadTestsFromName()'.
        """
        suites = [self.loadTestsFromName(name, module) for name in names]
        return self.suiteClass(suites)

    def getTestCaseNames(self, testCaseClass):
        """Return a sorted sequence of method names found within testCaseClass
        """
        def shouldIncludeMethod(attrname):
            if not attrname.startswith(self.testMethodPrefix):
                return False
            testFunc = getattr(testCaseClass, attrname)
            if not callable(testFunc):
                return False
            fullName = f'%s.%s.%s' % (
                testCaseClass.__module__, testCaseClass.__qualname__, attrname
            )
            return self.testNamePatterns is None or \
                any(fnmatchcase(fullName, pattern) for pattern in self.testNamePatterns)
        testFnNames = list(filter(shouldIncludeMethod, dir(testCaseClass)))
        if self.sortTestMethodsUsing:
            testFnNames.sort(key=functools.cmp_to_key(self.sortTestMethodsUsing))
        return testFnNames

    def discover(self, start_dir, pattern='test*.py', top_level_dir=None):
        """Find and return all test modules from the specified start
        directory, recursing into subdirectories to find them and return all
        tests found within them. Only test files that match the pattern will
        be loaded. (Using shell style pattern matching.)

        All test modules must be importable from the top level of the project.
        If the start directory is not the top level directory then the top
        level directory must be specified separately.

        If a test package name (directory with '__init__.py') matches the
        pattern then the package will be checked for a 'load_tests' function. If
        this exists then it will be called with (loader, tests, pattern) unless
        the package has already had load_tests called from the same discovery
        invocation, in which case the package module object is not scanned for
        tests - this ensures that when a package uses discover to further
        discover child tests that infinite recursion does not happen.

        If load_tests exists then discovery does *not* recurse into the package,
        load_tests is responsible for loading all tests in the package.

        The pattern is deliberately not stored as a loader attribute so that
        packages can continue discovery themselves. top_level_dir is stored so
        load_tests does not need to pass this argument in to loader.discover().

        Paths are sorted before being imported to ensure reproducible execution
        order even on filesystems with non-alphabetical ordering like ext3/4.
        """
        set_implicit_top = False
        if top_level_dir is None and self._top_level_dir is not None:
            # make top_level_dir optional if called from load_tests in a package
            top_level_dir = self._top_level_dir
        elif top_level_dir is None:
            set_implicit_top = True
            top_level_dir = start_dir

        top_level_dir = os.path.abspath(top_level_dir)

        if not top_level_dir in sys.path:
            # all test modules must be importable from the top level directory
            # should we *unconditionally* put the start directory in first
            # in sys.path to minimise likelihood of conflicts between installed
            # modules and development versions?
            sys.path.insert(0, top_level_dir)
        self._top_level_dir = top_level_dir

        is_not_importable = False
        is_namespace = False
        tests = []
        if os.path.isdir(os.path.abspath(start_dir)):
            start_dir = os.path.abspath(start_dir)
            if start_dir != top_level_dir:
                is_not_importable = not os.path.isfile(os.path.join(start_dir, '__init__.py'))
        else:
            # support for discovery from dotted module names
            try:
                __import__(start_dir)
            except ImportError:
                is_not_importable = True
            else:
                the_module = sys.modules[start_dir]
                top_part = start_dir.split('.')[0]
                try:
                    start_dir = os.path.abspath(
                       os.path.dirname((the_module.__file__)))
                except AttributeError:
                    # look for namespace packages
                    try:
                        spec = the_module.__spec__
                    except AttributeError:
                        spec = None

                    if spec and spec.loader is None:
                        if spec.submodule_search_locations is not None:
                            is_namespace = True

                            for path in the_module.__path__:
                                if (not set_implicit_top and
                                    not path.startswith(top_level_dir)):
                                    continue
                                self._top_level_dir = \
                                    (path.split(the_module.__name__
                                         .replace(".", os.path.sep))[0])
                                tests.extend(self._find_tests(path,
                                                              pattern,
                                                              namespace=True))
                    elif the_module.__name__ in sys.builtin_module_names:
                        # builtin module
                        raise TypeError('Can not use builtin modules '
                                        'as dotted module names') from None
                    else:
                        raise TypeError(
                            'don\'t know how to discover from {!r}'
                            .format(the_module)) from None

                if set_implicit_top:
                    if not is_namespace:
                        self._top_level_dir = \
                           self._get_directory_containing_module(top_part)
                        sys.path.remove(top_level_dir)
                    else:
                        sys.path.remove(top_level_dir)

        if is_not_importable:
            raise ImportError('Start directory is not importable: %r' % start_dir)

        if not is_namespace:
            tests = list(self._find_tests(start_dir, pattern))
        return self.suiteClass(tests)

    def _get_directory_containing_module(self, module_name):
        module = sys.modules[module_name]
        full_path = os.path.abspath(module.__file__)

        if os.path.basename(full_path).lower().startswith('__init__.py'):
            return os.path.dirname(os.path.dirname(full_path))
        else:
            # here we have been given a module rather than a package - so
            # all we can do is search the *same* directory the module is in
            # should an exception be raised instead
            return os.path.dirname(full_path)

    def _get_name_from_path(self, path):
        if path == self._top_level_dir:
            return '.'
        path = _jython_aware_splitext(os.path.normpath(path))

        _relpath = os.path.relpath(path, self._top_level_dir)
        assert not os.path.isabs(_relpath), "Path must be within the project"
        assert not _relpath.startswith('..'), "Path must be within the project"

        name = _relpath.replace(os.path.sep, '.')
        return name

    def _get_module_from_name(self, name):
        __import__(name)
        return sys.modules[name]

    def _match_path(self, path, full_path, pattern):
        # override this method to use alternative matching strategy
        return fnmatch(path, pattern)

    def _find_tests(self, start_dir, pattern, namespace=False):
        """Used by discovery. Yields test suites it loads."""
        # Handle the __init__ in this package
        name = self._get_name_from_path(start_dir)
        # name is '.' when start_dir == top_level_dir (and top_level_dir is by
        # definition not a package).
        if name != '.' and name not in self._loading_packages:
            # name is in self._loading_packages while we have called into
            # loadTestsFromModule with name.
            tests, should_recurse = self._find_test_path(
                start_dir, pattern, namespace)
            if tests is not None:
                yield tests
            if not should_recurse:
                # Either an error occurred, or load_tests was used by the
                # package.
                return
        # Handle the contents.
        paths = sorted(os.listdir(start_dir))
        for path in paths:
            full_path = os.path.join(start_dir, path)
            tests, should_recurse = self._find_test_path(
                full_path, pattern, namespace)
            if tests is not None:
                yield tests
            if should_recurse:
                # we found a package that didn't use load_tests.
                name = self._get_name_from_path(full_path)
                self._loading_packages.add(name)
                try:
                    yield from self._find_tests(full_path, pattern, namespace)
                finally:
                    self._loading_packages.discard(name)

    def _find_test_path(self, full_path, pattern, namespace=False):
        """Used by discovery.

        Loads tests from a single file, or a directories' __init__.py when
        passed the directory.

        Returns a tuple (None_or_tests_from_file, should_recurse).
        """
        basename = os.path.basename(full_path)
        if os.path.isfile(full_path):
            if not VALID_MODULE_NAME.match(basename):
                # valid Python identifiers only
                return None, False
            if not self._match_path(basename, full_path, pattern):
                return None, False
            # if the test file matches, load it
            name = self._get_name_from_path(full_path)
            try:
                module = self._get_module_from_name(name)
            except case.SkipTest as e:
                return _make_skipped_test(name, e, self.suiteClass), False
            except:
                error_case, error_message = \
                    _make_failed_import_test(name, self.suiteClass)
                self.errors.append(error_message)
                return error_case, False
            else:
                mod_file = os.path.abspath(
                    getattr(module, '__file__', full_path))
                realpath = _jython_aware_splitext(
                    os.path.realpath(mod_file))
                fullpath_noext = _jython_aware_splitext(
                    os.path.realpath(full_path))
                if realpath.lower() != fullpath_noext.lower():
                    module_dir = os.path.dirname(realpath)
                    mod_name = _jython_aware_splitext(
                        os.path.basename(full_path))
                    expected_dir = os.path.dirname(full_path)
                    msg = ("%r module incorrectly imported from %r. Expected "
                           "%r. Is this module globally installed?")
                    raise ImportError(
                        msg % (mod_name, module_dir, expected_dir))
                return self.loadTestsFromModule(module, pattern=pattern), False
        elif os.path.isdir(full_path):
            if (not namespace and
                not os.path.isfile(os.path.join(full_path, '__init__.py'))):
                return None, False

            load_tests = None
            tests = None
            name = self._get_name_from_path(full_path)
            try:
                package = self._get_module_from_name(name)
            except case.SkipTest as e:
                return _make_skipped_test(name, e, self.suiteClass), False
            except:
                error_case, error_message = \
                    _make_failed_import_test(name, self.suiteClass)
                self.errors.append(error_message)
                return error_case, False
            else:
                load_tests = getattr(package, 'load_tests', None)
                # Mark this package as being in load_tests (possibly ;))
                self._loading_packages.add(name)
                try:
                    tests = self.loadTestsFromModule(package, pattern=pattern)
                    if load_tests is not None:
                        # loadTestsFromModule(package) has loaded tests for us.
                        return tests, False
                    return tests, True
                finally:
                    self._loading_packages.discard(name)
        else:
            return None, False


defaultTestLoader = TestLoader()


def _makeLoader(prefix, sortUsing, suiteClass=None, testNamePatterns=None):
    loader = TestLoader()
    loader.sortTestMethodsUsing = sortUsing
    loader.testMethodPrefix = prefix
    loader.testNamePatterns = testNamePatterns
    if suiteClass:
        loader.suiteClass = suiteClass
    return loader

def getTestCaseNames(testCaseClass, prefix, sortUsing=util.three_way_cmp, testNamePatterns=None):
    return _makeLoader(prefix, sortUsing, testNamePatterns=testNamePatterns).getTestCaseNames(testCaseClass)

def makeSuite(testCaseClass, prefix=testname, sortUsing=util.three_way_cmp,
              suiteClass=suite.TestSuite):
    return _makeLoader(prefix, sortUsing, suiteClass).loadTestsFromTestCase(
        testCaseClass)

def findTestCases(module, prefix=testname, sortUsing=util.three_way_cmp,
                  suiteClass=suite.TestSuite):
    return _makeLoader(prefix, sortUsing, suiteClass).loadTestsFromModule(\
        module)

然后我们去改造下main，

# -*- coding: utf-8 -*-


import sys
import argparse
import os
from load import defaultTestLoader

from unittest import  runner
from unittest.signals import installHandler

__unittest = True

MAIN_EXAMPLES = """\
Examples:
  %(prog)s test_module               - run tests from test_module
  %(prog)s module.TestClass          - run tests from module.TestClass
  %(prog)s module.Class.test_method  - run specified test method
  %(prog)s path/to/test_file.py      - run tests from test_file.py
"""

MODULE_EXAMPLES = """\
Examples:
  %(prog)s                           - run default set of tests
  %(prog)s MyTestSuite               - run suite 'MyTestSuite'
  %(prog)s MyTestCase.testSomething  - run MyTestCase.testSomething
  %(prog)s MyTestCase                - run all 'test*' test methods
                                       in MyTestCase
"""

def _convert_name(name):
    # on Linux / Mac OS X 'foo.PY' is not importable, but on
    # Windows it is. Simpler to do a case insensitive match
    # a better check would be to check that the name is a
    # valid Python module name.
    if os.path.isfile(name) and name.lower().endswith('.py'):
        if os.path.isabs(name):
            rel_path = os.path.relpath(name, os.getcwd())
            if os.path.isabs(rel_path) or rel_path.startswith(os.pardir):
                return name
            name = rel_path
        # on Windows both '\' and '/' are used as path
        # separators. Better to replace both than rely on os.path.sep
        return name[:-3].replace('\\', '.').replace('/', '.')
    return name

def _convert_names(names):
    return [_convert_name(name) for name in names]


def _convert_select_pattern(pattern):
    if not '*' in pattern:
        pattern = '*%s*' % pattern
    return pattern


class TestProgram(object):
    """A command-line program that runs a set of tests; this is primarily
       for making test modules conveniently executable.
    """
    # defaults for testing
    module=None
    verbosity = 1
    failfast = catchbreak = buffer = progName = warnings = testNamePatterns = None
    _discovery_parser = None

    def __init__(self, module='__main__', defaultTest=None, argv=None,
                    testRunner=None, testLoader=defaultTestLoader,
                    exit=True, verbosity=1, failfast=None, catchbreak=None,
                    buffer=None, warnings=None, *, tb_locals=False):
        if isinstance(module, str):
            self.module = __import__(module)
            for part in module.split('.')[1:]:
                self.module = getattr(self.module, part)
        else:
            self.module = module
        if argv is None:
            argv = sys.argv

        self.exit = exit
        self.failfast = failfast
        self.catchbreak = catchbreak
        self.verbosity = verbosity
        self.buffer = buffer
        self.tb_locals = tb_locals
        if warnings is None and not sys.warnoptions:
            # even if DeprecationWarnings are ignored by default
            # print them anyway unless other warnings settings are
            # specified by the warnings arg or the -W python flag
            self.warnings = 'default'
        else:
            # here self.warnings is set either to the value passed
            # to the warnings args or to None.
            # If the user didn't pass a value self.warnings will
            # be None. This means that the behavior is unchanged
            # and depends on the values passed to -W.
            self.warnings = warnings
        self.defaultTest = defaultTest
        self.testRunner = testRunner
        self.testLoader = testLoader
        self.progName = os.path.basename(argv[0])
        self.parseArgs(argv)
        self.runTests()

    def usageExit(self, msg=None):
        if msg:
            print(msg)
        if self._discovery_parser is None:
            self._initArgParsers()
        self._print_help()
        sys.exit(2)

    def _print_help(self, *args, **kwargs):
        if self.module is None:
            print(self._main_parser.format_help())
            print(MAIN_EXAMPLES % {'prog': self.progName})
            self._discovery_parser.print_help()
        else:
            print(self._main_parser.format_help())
            print(MODULE_EXAMPLES % {'prog': self.progName})

    def parseArgs(self, argv):
        self._initArgParsers()
        if self.module is None:
            if len(argv) > 1 and argv[1].lower() == 'discover':
                self._do_discovery(argv[2:])
                return
            self._main_parser.parse_args(argv[1:], self)
            if not self.tests:
                # this allows "python -m unittest -v" to still work for
                # test discovery.
                self._do_discovery([])
                return
        else:
            self._main_parser.parse_args(argv[1:], self)

        if self.tests:
            self.testNames = _convert_names(self.tests)
            if __name__ == '__main__':
                # to support python -m unittest ...
                self.module = None
        elif self.defaultTest is None:
            # createTests will load tests from self.module
            self.testNames = None
        elif isinstance(self.defaultTest, str):
            self.testNames = (self.defaultTest,)
        else:
            self.testNames = list(self.defaultTest)
        self.createTests()

    def createTests(self, from_discovery=False, Loader=None):
        if self.testNamePatterns:
            self.testLoader.testNamePatterns = self.testNamePatterns
        if from_discovery:
            loader = self.testLoader if Loader is None else Loader()
            self.test = loader.discover(self.start, self.pattern, self.top)
        elif self.testNames is None:
            self.test = self.testLoader.loadTestsFromModule(self.module)
        else:
            self.test = self.testLoader.loadTestsFromNames(self.testNames,
                                                           self.module)

    def _initArgParsers(self):
        parent_parser = self._getParentArgParser()
        self._main_parser = self._getMainArgParser(parent_parser)
        self._discovery_parser = self._getDiscoveryArgParser(parent_parser)

    def _getParentArgParser(self):
        parser = argparse.ArgumentParser(add_help=False)

        parser.add_argument('-v', '--verbose', dest='verbosity',
                            action='store_const', const=2,
                            help='Verbose output')
        parser.add_argument('-q', '--quiet', dest='verbosity',
                            action='store_const', const=0,
                            help='Quiet output')
        parser.add_argument('--locals', dest='tb_locals',
                            action='store_true',
                            help='Show local variables in tracebacks')
        if self.failfast is None:
            parser.add_argument('-f', '--failfast', dest='failfast',
                                action='store_true',
                                help='Stop on first fail or error')
            self.failfast = False
        if self.catchbreak is None:
            parser.add_argument('-c', '--catch', dest='catchbreak',
                                action='store_true',
                                help='Catch Ctrl-C and display results so far')
            self.catchbreak = False
        if self.buffer is None:
            parser.add_argument('-b', '--buffer', dest='buffer',
                                action='store_true',
                                help='Buffer stdout and stderr during tests')
            self.buffer = False
        if self.testNamePatterns is None:
            parser.add_argument('-k', dest='testNamePatterns',
                                action='append', type=_convert_select_pattern,
                                help='Only run tests which match the given substring')
            self.testNamePatterns = []

        return parser

    def _getMainArgParser(self, parent):
        parser = argparse.ArgumentParser(parents=[parent])
        parser.prog = self.progName
        parser.print_help = self._print_help

        parser.add_argument('tests', nargs='*',
                            help='a list of any number of test modules, '
                            'classes and test methods.')

        return parser

    def _getDiscoveryArgParser(self, parent):
        parser = argparse.ArgumentParser(parents=[parent])
        parser.prog = '%s discover' % self.progName
        parser.epilog = ('For test discovery all test modules must be '
                         'importable from the top level directory of the '
                         'project.')

        parser.add_argument('-s', '--start-directory', dest='start',
                            help="Directory to start discovery ('.' default)")
        parser.add_argument('-p', '--pattern', dest='pattern',
                            help="Pattern to match tests ('test*.py' default)")
        parser.add_argument('-t', '--top-level-directory', dest='top',
                            help='Top level directory of project (defaults to '
                                 'start directory)')
        for arg in ('start', 'pattern', 'top'):
            parser.add_argument(arg, nargs='?',
                                default=argparse.SUPPRESS,
                                help=argparse.SUPPRESS)

        return parser

    def _do_discovery(self, argv, Loader=None):
        self.start = '.'
        self.pattern = 'test*.py'
        self.top = None
        if argv is not None:
            # handle command line args for test discovery
            if self._discovery_parser is None:
                # for testing
                self._initArgParsers()
            self._discovery_parser.parse_args(argv, self)

        self.createTests(from_discovery=True, Loader=Loader)

    def runTests(self):
        if self.catchbreak:
            installHandler()
        if self.testRunner is None:
            self.testRunner = runner.TextTestRunner
        if isinstance(self.testRunner, type):
            try:
                try:
                    testRunner = self.testRunner(verbosity=self.verbosity,
                                                 failfast=self.failfast,
                                                 buffer=self.buffer,
                                                 warnings=self.warnings,
                                                 tb_locals=self.tb_locals)
                except TypeError:
                    # didn't accept the tb_locals argument
                    testRunner = self.testRunner(verbosity=self.verbosity,
                                                 failfast=self.failfast,
                                                 buffer=self.buffer,
                                                 warnings=self.warnings)
            except TypeError:
                # didn't accept the verbosity, buffer or failfast arguments
                testRunner = self.testRunner()
        else:
            # it is assumed to be a TestRunner instance
            testRunner = self.testRunner
        self.result = testRunner.run(self.test)
        if self.exit:
            sys.exit(not self.result.wasSuccessful())

main = TestProgram

我们在需要在config增加一个

testname="leizi"

然后就可以实现我们的功能。 主要修改如下：

                1.首先修改testMethodPrefix，我们可以看到，接下来再去加载的时候，

会使用到这个地方，这是是获取测试用例名称的。这里我们修改完毕后，

去加载测试用例的时候，也需要修改，修改完毕后，我们可以去写以一个方式去测试下。\

import unittest
from newmain import main

class testone(unittest.TestCase):
    def setUp(self) -> None: pass

    def leizi1(self):
     print("leizitest")
     self.assertTrue(True)
    def tearDown(self) -> None: pass

    def leizi2(self):
     print("leizitest")
     self.assertTrue(True)
    def testone(self):
        print("test test")
        self.assertFalse(False)
if __name__=="__main__":
  main()

我们执行下看下结果

一共执行了两个测试用例，其实我们写了三个，但是第三个由于不是leizi开通的，所以这里就没有适配，当然了，我们还可以增加一个方法，对这里的进行兼容，我们可以兼容不同命名的方法。

我们可以看到，我们的改造只是对于加载的时候做了改造，这里我们在新的文件写了这个方法，就是方便我们以后如果从重装环境，对于我们修改后的代码同样是有效的。

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