Class: RSpec::Support::Differ

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

Overview

rubocop:disable Style/Documentation

Instance Method Summary collapse

Instance Method Details

#diff_as_object(actual, expected) ⇒ Object 



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# File 'lib/rspec_hashdiff_helper.rb', line 59

def diff_as_object(actual, expected)
  if actual.instance_of?(Hash) && expected.instance_of?(Hash)
    mod_actual, mod_expected = format_hashes_for_diff(actual, expected)
    diff = Hashdiff.diff(mod_actual,
                         mod_expected,
                         delimiter: ':',
                         array_path: true,
                         similarity: 1,
                         strict: false,
                         use_lcs: false,
                         indifferent: true)

    diff_str = diff.sort_by { |x| x[1].map(&:to_s) }.map do |diff_line|
      keys = diff_line[1]
      case diff_line[0]
      when '~'
        "+ #{keys.map { |key| "{#{key}:" }.join} #{diff_line[2]} #{Array.new(keys.length) { '}' }.join}\n" \
          "- #{keys.map { |key| "{#{key}:" }.join} #{diff_line[3]} #{Array.new(keys.length) { '}' }.join}\n"
      when '+', '-'
        "#{diff_line[0]} #{keys.map { |key| "{#{key}:" }.join}"\
          " #{diff_line[2]} #{Array.new(keys.length) { '}' }.join}\n"
      end
    end.join
    color_diff "\n#{diff_str}"
  else
    actual_as_string = object_to_string(actual)
    expected_as_string = object_to_string(expected)
    diff_as_string(actual_as_string, expected_as_string)
  end
end

#find_contain_nodes(object, current_path = []) ⇒ Object 



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# File 'lib/rspec_hashdiff_helper.rb', line 20

def find_contain_nodes(object, current_path = [])
  if object.instance_of?(RSpec::Matchers::BuiltIn::Match)
    find_contain_nodes(object.expected, current_path)
  elsif object.instance_of?(RSpec::Matchers::BuiltIn::ContainExactly)
    paths = [current_path.dup]
    find_contain_nodes(object.expected, current_path).each { |p| paths << p }
    paths
  elsif object.instance_of?(Hash)
    paths = []
    object.each { |key, value| find_contain_nodes(value, current_path.dup << key).each { |p| paths << p } }
    paths
  elsif object.instance_of?(Array)
    paths = []
    object.each_with_index { |value, index| find_contain_nodes(value, current_path.dup << index).each { |p| paths << p } }
    paths
  else
    []
  end
end

#format_hashes_for_diff(actual, expected) ⇒ Object 



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# File 'lib/rspec_hashdiff_helper.rb', line 40

def format_hashes_for_diff(actual, expected)
  paths_to_contain_nodes = find_contain_nodes(expected)
  expected = strip_matchers(expected)

  paths_to_contain_nodes.each do |full_path|
    actual_target = actual
    expected_target = expected
    full_path.each do |step|
      actual_target = actual_target.respond_to?(:[]) ? actual_target[step] : nil
      expected_target = expected_target[step]
    end

    actual_target&.sort_by! { |v| v.instance_of?(Hash) ? v.to_s : v }
    expected_target.sort_by! { |v| v.instance_of?(Hash) ? v.to_s : v }
  end

  [actual, expected]
end

#strip_matchers(expected) ⇒ Object 



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# File 'lib/rspec_hashdiff_helper.rb', line 8

def strip_matchers(expected)
  if expected.respond_to?(:expected)
    strip_matchers(expected.expected)
  elsif expected.instance_of?(Hash)
    expected.transform_values { |v| strip_matchers(v) }
  elsif expected.instance_of?(Array)
    expected.map { |v| strip_matchers(v) }
  else
    expected
  end
end