Calculate branch coverage of the test suite

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• Branch coverage tracks which control flow branches were (and were not) followed within the execution of a test suite.

Task

• Update the SimpleCov configuration so that it also calculates branch coverage.

Steps

• Update configuration code:
  • test/test_helper.rb - code file to edit.
• Calculate statement and brach coverage:
  • rails test -v - command to run tests and generate coverage report.
• Inspect the statement coverage results:
  • coverage/index.html - coverage report to view in web browser.

Reference Code

• Test helper configuration code:

require 'simplecov'
SimpleCov.start('rails') do
  enable_coverage :branch
end

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