muPluginsDir - required; the path to the WordPress must-use plugins directory.
symlink - whether to symlink the plugin or copy it. By default, the plugin is copied in the must-use plugins directory and symlink is set to false. If you're not using containers, that will ignore symlinked plugins, you can set symlink to true to symlink the plugin in the must-use plugins directory. Symbolic linking is faster and uses less disk space than copying the plugin.
Example configuration to symlink the plugin in the muPluginsDir directory before the tests:
The module will either symlink or copy the plugin in the muPluginsDir directory, depending on the symlink configuration parameter before the test suite runs, and will remove it after the test suite has run.