class RSpec::Core::ExampleStatusMerger

Merges together a list of example statuses from this run and a list from previous runs (presumably loaded from disk). Each example status object is expected to be a hash with at least an ‘:example_id` and a `:status` key. Examples that were loaded but not executed (due to filtering, `–fail-fast` or whatever) should have a `:status` of `UNKNOWN_STATUS`.

This will produce a new list that:

- Will be missing examples from previous runs that we know for sure
  no longer exist.
- Will have the latest known status for any examples that either
  definitively do exist or may still exist.
- Is sorted by file name and example definition order, so that
  the saved file is easily scannable if users want to inspect it.

@private

# File rspec-core/lib/rspec/core/example_status_persister.rb, line 75
def self.merge(this_run, from_previous_runs)
  new(this_run, from_previous_runs).merge
end

# File rspec-core/lib/rspec/core/example_status_persister.rb, line 79
def initialize(this_run, from_previous_runs)
  @this_run           = hash_from(this_run)
  @from_previous_runs = hash_from(from_previous_runs)
  @file_exists_cache  = Hash.new { |hash, file| hash[file] = File.exist?(file) }
end

# File rspec-core/lib/rspec/core/example_status_persister.rb, line 85
def merge
  delete_previous_examples_that_no_longer_exist

  @this_run.merge(@from_previous_runs) do |_ex_id, new, old|
    new.fetch(:status) == Configuration::UNKNOWN_STATUS ? old : new
  end.values.sort_by(&method(:sort_value_from))
end