Class: ActiveMutator::BaselineDelta

Inherits:
Object
  • Object
show all
Defined in:
lib/active_mutator/baseline_delta.rb

Overview

Decides how to refresh a stale coverage cache: surgically (re-run only affected spec files / examples) or fully (the safe fallback). Rules per the v1.1 spec's delta table; anything ambiguous prefers full.

Defined Under Namespace

Classes: Delta

Constant Summary collapse

FULL = 
Delta.new(full: true, rerun_spec_files: [], rerun_example_ids: [],
drop_example_ids: [], drop_source_files: [])

Class Method Summary collapse

Class Method Details

.compute(old_digests:, new_digests:, coverage_map:, root:) ⇒ Object 



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# File 'lib/active_mutator/baseline_delta.rb', line 14

def self.compute(old_digests:, new_digests:, coverage_map:, root:)
  changed = (old_digests.keys | new_digests.keys)
            .reject { |k| old_digests[k] == new_digests[k] }
  return FULL if changed.any? { |k| full_trigger?(k) }

  rerun_spec_files = []
  rerun_example_ids = []
  drop_example_ids = []
  drop_source_files = []

  changed.each do |rel|
    added = !old_digests.key?(rel)
    deleted = !new_digests.key?(rel)
    if rel.start_with?("spec/")
      owned = coverage_map.examples_for_spec_file(rel)
      if deleted
        # A deleted spec file with no records is support-like: other spec
        # files may require it, and partial re-runs would explode. Full.
        return FULL if owned.empty?
        drop_example_ids.concat(owned)
      elsif !added && owned.empty?
        return FULL # pre-existing spec file owning no examples: support-like
      else
        rerun_spec_files << rel
      end
    else
      abs = File.join(root, rel)
      drop_source_files << abs if deleted
      rerun_example_ids.concat(coverage_map.examples_covering_file(abs)) unless added
    end
  end

  Delta.new(full: false,
            rerun_spec_files: rerun_spec_files.uniq.sort,
            rerun_example_ids: rerun_example_ids.uniq.sort,
            drop_example_ids: drop_example_ids.uniq.sort,
            drop_source_files: drop_source_files.uniq.sort)
end

.full_trigger?(rel) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_mutator/baseline_delta.rb', line 53

def self.full_trigger?(rel)
  rel.start_with?("spec/support/") || !rel.end_with?(".rb")
end