Class: Evilution::Mutator::Operator::SuperclassRemoval

Inherits:
Base
  • Object
show all
Defined in:
lib/evilution/mutator/operator/superclass_removal.rb

Defined Under Namespace

Classes: ClassFinder

Instance Attribute Summary

Attributes inherited from Base

#mutations

Instance Method Summary collapse

Methods inherited from Base

clear_parse_cache!, #initialize, operator_name, parsed_tree_for

Constructor Details

This class inherits a constructor from Evilution::Mutator::Base

Instance Method Details

#call(subject, filter: nil) ⇒ Object 



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# File 'lib/evilution/mutator/operator/superclass_removal.rb', line 8

def call(subject, filter: nil)
  @subject = subject
  @file_source = File.read(subject.file_path)
  @mutations = []
  @filter = filter

  tree = self.class.parsed_tree_for(subject.file_path, @file_source)
  enclosing = find_enclosing_class(tree, subject.line_number)
  return @mutations unless enclosing
  return @mutations unless enclosing.superclass

  first_method_line = find_first_method_line(enclosing)
  return @mutations unless first_method_line == subject.line_number

  name_end = enclosing.constant_path.location.start_offset + enclosing.constant_path.location.length
  superclass_end = enclosing.superclass.location.start_offset + enclosing.superclass.location.length

  add_mutation(
    offset: name_end,
    length: superclass_end - name_end,
    replacement: "",
    node: enclosing
  )

  @mutations
end