Introducing Simpletest code coverage

[legovaer]

Introduction

This PR will allow a user to generate code coverage reports for Simpletest executions.

Features

• Generates a code coverage report using sebastianbergmann/phpcov which generates the same report as PHPUnit.
• Automatically creates a new branch inside the GitHub repository in order to store the coverage report.
• Generates a badge (optional) which indicates the percentage of the code which has been covered by simpletest

New Variables

This PR introduces several new variables to the .travis.yml file:

• DRUPAL_TI_SIMPLETEST_COVERAGE - Can be set to "1" in order to enable the code coverage reports
• DRUPAL_TI_SIMPLETEST_COVERAGE_GENERATE_BADGES- Can be set ti "1" in order to enable a badge which indicates the percentage of the code which has been covered by Simpletest
• DRUPAL_TI_GITHUB_EMAIL - A secured variable containing the user's e-mail address
• DRUPAL_TI_GITHUB_EMAIL - A secured variable containing the user's full name
• DRUPAL_TI_GITHUB_EMAIL - A secured variable containing the user's application token

Examples

Currently I have a very good example of the power of this PR:

• See the updated README.md file of the Scheduler module containing the badge
• See the code coverage page of the Scheduler module

Todo

• Test with a D8 module
• PHPUnit & Simpletest results should get merged

Open pull requests

• Wait for Introduced a start and stop function sebastianbergmann/phpcov#51
• Wait for Introduce start stop sebastianbergmann/php-code-coverage#442

Nice-to-have

• Publish results to coveralls.io

[legovaer]

Some of the tests fail because the Github credentials are not part of the .travis.yml file. Shall I use mine? I do need an application token form your end however.

[coveralls]

Coverage remained the same at 100.0% when pulling b48b627 on legovaer:add-coverage-support into 9b1253d on LionsAd:master.