Class: Solargraph::Rspec::SpecWalker::FakeLetMethod

Inherits:
Object
  • Object
show all
Defined in:
lib/solargraph/rspec/spec_walker/fake_let_method.rb

Constant Summary collapse

MATCH_DO_END =
/.*? do(.*)end/m.freeze
MATCH_CURLY =
/{(.*)}/m.freeze

Class Method Summary collapse

Class Method Details

.transform_block(block_ast, code, method_name = nil) ⇒ RubyVM::AbstractSyntaxTree::Node?

Parameters:

  • block_ast (RubyVM::AbstractSyntaxTree::Node)

Returns:

  • (RubyVM::AbstractSyntaxTree::Node, nil)


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# File 'lib/solargraph/rspec/spec_walker/fake_let_method.rb', line 12

def self.transform_block(block_ast, code, method_name = nil)
  method_name ||= NodeTypes.let_method_name(block_ast)
  block_body = block_ast.children[1]
  let_definition_code = code.lines[block_body.first_lineno - 1..block_body.last_lineno - 1].join
  match_do_end = let_definition_code.match(MATCH_DO_END)&.captures&.first || ''
  match_curly = let_definition_code.match(MATCH_CURLY)&.captures&.first || ''
  method_body = [match_do_end, match_curly].max_by(&:length).strip

  ast = RubyVM::AbstractSyntaxTree.parse <<~RUBY
    def #{method_name}
      #{method_body}
    end
  RUBY

  ast.children[2]
rescue SyntaxError => e
  Solargraph.logger.warn "[RSpec] Failed to build fake let method: #{e.message}, \
    \n\nlet_definition_code: \n```\n#{let_definition_code}\n```, \
    \n\nmethod_body: \n```\n#{method_body}\n```, \
    \nast: #{block_ast.inspect}"
ensure
  nil
end