DotGoodies.Testing.Log4Net helps to configure logging within tests.
It can also intercept error and fatal messages so a test can assert this.
An integration or unit test can use it during setting the SUT up and during the assertion phase.
DotGoodies.Testing.ApplicationConfiguration provides a programmatic way to change the values stored in application configuration section of a app.config file.
An integration or unit test can use it during setting the SUT up.