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`Minitest.plugin_rails_init` sets `Minitest.backtrace_filter` to `Rails.backtrace_cleaner` right before tests are run, overwriting the value set in test_helper.rb. `Rails.backtrace_cleaner` silences backtrace lines that do not start with `Rails.root` followed by e.g. "lib/" or "test/". Thus when `Rails.root` is a subdirectory of the project directory -- for example, when testing a plugin that has a dummy app -- all lines of the backtrace are silenced. This commit adds a fallback such that when all backtrace lines are silenced, the original `Minitest.backtrace_filter` is used instead. Additionally, this commit refactors and expands existing test coverage. |
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| rails.rb | ||