Folds captured output sections in Travis CI build log

## Project description

Pytest plugin that folds captured output sections in Travis CI build log.

In addition, pytest-travis-fold recognizes presence of the pytest-cov plugin and folds coverage reports accordingly.

## Installation and Usage

Just install the pytest-travis-fold package as part of your build.

When using tox, add the package to the deps list in your tox.ini and make sure the TRAVIS environment variable is passed:

[testenv]
deps =
pytest-travis-fold
passenv = TRAVIS

If you don’t use tox and invoke py.test directly from .travis.yml, you may install the package as an additional install step:

install:
- pip install -e .
- pip install pytest-travis-fold

script: py.test

Output folding is enabled automatically when running inside Travis CI. It is OK to have the plugin installed also in your dev environment: it is only activated by checking the presence of the TRAVIS environmental variable, unless the --travis-fold command line switch is used.

## The travis fixture

The plugin by itself only makes the captured output sections appear folded. If you wish to make the same thing with arbitrary lines, you can do it manually by using the travis fixture.

It is possible to fold the output of a certain code block using the travis.folding_output() context manager:

def test_something(travis):
with travis.folding_output():
print('Lines, lines, lines...')
print('Lots of them!')
...

Or you may want to use lower-level travis.fold_string() and travis.fold_lines() functions and then output the result as usual.

## Contributing

Contributions are very welcome. Tests can be run with tox, please ensure the coverage at least stays the same before you submit a pull request.

## Issues

If you encounter any problems, please file an issue along with a detailed description.

## Project details

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