The test code generator using static analysis and LLM Hashino Mikiko (@mikiko_bridge)

Agenda - What is “omochi” ? - Motivation - Demo - Architecture - Future Works - Conclusion

What is “omochi” ? Detect RSpec files and methods that have not yet been created, and generate sample code for them. feature - List all methods which is not tested by RSpec - Integrate with CI(github action) - Automatically generate RSpec code template

What is “omochi” ? feature 1. List all methods which is not tested by RSpec "Verify File List: [\"app/controllers/content_controller.rb\"]" "specファイルなし" ======= RESULT: app/controllers/content_controller.rb ======= - index - show - destroy - edit - update

What is “omochi” ? feature 2. Integrate with CI(github action)

What is “omochi” ? feature 3. Automatically generate RSpec code template

Agenda - What is “omochi” ? - Motivation - Demo - Architecture - Future Works - Conclusion

Motivation Omochi confirmed that all methods in PR have RSpec. It is hard to find unverified method by reviewer Some methods don’t have RSpec in your PR.

Agenda - What is “omochi” ? - Demo - Architecture - Future Works - Conclusion

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Agenda - What is “omochi” ? - Demo - Architecture - Future Works - Conclusion

Architecture def local_diff_path ...省略 diff_command = 'git diff --diff-filter=d --name-only' diff_output, _diff_error, _diff_status = Open3.capture3(diff_command, chdir: '.') ...省略 diff_output.split("\n") end

Architecture def get_ast(diff_path) exprs = [] ast = Parser::CurrentRuby.parse(File.read(diff_path)) exprs << { ast: ast, filename: diff_path } end

Architecture

Architecture def dfs(node, filename, result) ...省略 case node.type when :def child_value = node.children[0] code = Unparser.unparse(node) result[child_value] = code end node.children.each { |child| dfs(child, filename, result) } end

Architecture def find_spec_file(diff_path) spec_path = File.join('spec', diff_path.gsub(/\.rb$/, '_spec.rb').gsub('app/', '')) File.exist?(spec_path) ? spec_path : nil end

Architecture def get_ast(diff_path) exprs = [] ast = Parser::CurrentRuby.parse(File.read(diff_path)) exprs << { ast: ast, filename: diff_path } end

Architecture def get_ast(diff_path) exprs = [] ast = Parser::CurrentRuby.parse(File.read(diff_path)) exprs << { ast: ast, filename: diff_path } end def dfs_describe(node, filename, def_name_arr) ...省略 case node.type when :send method_node = node.children[1] if node.children[1] == :describe def_name = node.children[2].children[0] # "Omochi::CLI" if !def_name.nil? && def_name.is_a?(String) def_name = get_pure_function_name(def_name) def_name_arr.push(def_name) end end end node.children.each { |child| dfs_describe(child, filename, def_name_arr) } def_name_arr end

Architecture def process_spec_file(diff_path, create_spec, perfect) ...省略 method_code = result[spec_def_name] puts '===================================================================' puts "#{spec_def_name} のテストを以下に表示します。 " create_spec_by_bedrock(method_code) end get_ignore_methods(diff_path).each do |def_name| result[def_name] = true if result.key?(def_name) end perfect = false if print_result(diff_path, result).size > 0 perfect end

Agenda - What is “omochi” ? - Demo - Architecture - Future Works - Conclusion

Future Works - Support request spec etc… - Write test codes for omochi

Agenda - What is “omochi” ? - Demo - Architecture - Future Works - Conclusion

Conclusion - Please commits to omochi !! - Let's use AST to solve problems using technology👍 https://github.com/mikik0/omochi blog GitHub