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Enable verbose mode in test and report warnings as errors
We recently let a few very easy to avoid warnings get merged. The root cause is that locally the test suite doesn't run in verbose mode unless you explictly pass `-w`. On CI warnings are enabled, but there is no reason to look at the build output unless something is failing. And even if one wanted to do that, that would be particularly work intensive since warnings may be specific to a Ruby version etc. Because of this I believe we should: - Always run the test suite with warnings enabled. - Raise an error if a warning is unexpected. We've been using this pattern for a long time at Shopify both in private and public repositories.
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27 changes: 27 additions & 0 deletions
27
activesupport/lib/active_support/testing/strict_warnings.rb
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Original file line number | Diff line number | Diff line change |
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# frozen_string_literal: true | ||
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$VERBOSE = true | ||
Warning[:deprecated] = true | ||
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module RaiseWarnings | ||
PROJECT_ROOT = File.expand_path("../../../../", __dir__) | ||
ALLOWED_WARNINGS = Regexp.union( | ||
/circular require considered harmful.*delayed_job/, # Bug in delayed job. | ||
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# Expected non-verbose warning emitted by Rails. | ||
/Ignoring .*\.yml because it has expired/, | ||
/Failed to validate the schema cache because/, | ||
) | ||
def warn(message, *) | ||
super | ||
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return unless message.include?(PROJECT_ROOT) | ||
return if ALLOWED_WARNINGS.match?(message) | ||
return unless ENV["RAILS_STRICT_WARNINGS"] || ENV["CI"] | ||
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raise message | ||
end | ||
ruby2_keywords :warn if respond_to?(:ruby2_keywords, true) | ||
end | ||
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Warning.singleton_class.prepend(RaiseWarnings) |
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