A class whose instances are single test cases.

By default, the test code itself should be placed in a method named
'runTest'.

If the fixture may be used for many test cases, create as
many test methods as are needed. When instantiating such a TestCase
subclass, specify in the constructor arguments the name of the test method
that the instance is to execute.
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A test suite is a composite test consisting of a number of TestCases.

For use, create an instance of TestSuite, then add test case instances.
When all tests have been added, the suite can be passed to a test
runner, such as TextTestRunner. It will run the individual test cases
in the order in which they were added, aggregating the results. When
subclassing, do not forget to call the base class constructor.

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A command-line program that runs a set of tests; this is primarily
for making test modules conveniently executable.

This class is responsible for loading tests according to various criteria
and returning them wrapped in a TestSuite

A test runner class that displays results in textual form.

It prints out the names of tests as they are run, errors as they
occur, and a summary of the results at the end of the test run.

Holder for test result information.

Test results are automatically managed by the TestCase and TestSuite
classes, and do not need to be explicitly manipulated by writers of tests.

Each instance holds the total number of tests run, and collections of
failures and errors that occurred among those test runs. The collections
contain tuples of (testcase, exceptioninfo), where exceptioninfo is the
formatted traceback of the error that occurred.

This class is responsible for loading tests according to various criteria
and returning them wrapped in a TestSuite

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A test case that wraps a test function.

This is useful for slipping pre-existing test functions into the
unittest framework. Optionally, set-up and tidy-up functions can be
supplied. As with TestCase, the tidy-up ('tearDown') function will
always be called if the set-up ('setUp') function ran successfully.

Raise this exception in a test to skip it.

Usually you can use TestResult.skip() or one of the skipping decorators
instead of raising this directly.

A test result class that can print formatted text results to a stream.

Used by TextTestRunner.

A command-line program that runs a set of tests; this is primarily
for making test modules conveniently executable.

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Running tests

Test case implementation

Skip a test unless the condition is true.

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