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Test coverage reporting

Differences From coverage

The coverage tool is the basis for nose2's coverage reporting. nose2 will seek to emulate coverage behavior whenever possible, but there are known cases where this is not feasible.

If you need the exact behaviors of coverage, consider having coverage invoke nose2.

Otherwise, please be aware of the following known differences:

  • The fail_under parameter results in an exit status of 2 for coverage, but an exit status of 1 for nose2

Compatibility with mp plugin

The coverage and mp plugins may be used in conjunction to enable multiprocess testing with coverage reporting.

Special instructions:

  • Due to the way the plugin is reloaded in subprocesses, command-line options for the coverage plugin have no effect. If you need to change any coverage plugin options, use a configuration file.
  • Do not use the concurrency option within a .coveragerc file ; this interferes with the coverage plugin, which automatically handles multiprocess coverage reporting.