Add test for Cli

Author: sue445

Gemfile

@@ -6,6 +6,7 @@ gem "rake"
 gem "rspec"
 gem "rspec-its"
 gem "rspec-parameterized"
+gem "rspec-temp_dir"
 gem "rubocop", require: false
 gem "rubocop_auto_corrector", require: false
 gem "serverspec"

Gemfile.lock

@@ -88,6 +88,8 @@ GEM
       binding_of_caller
       rspec-parameterized-core (< 2)
     rspec-support (3.13.1)
+    rspec-temp_dir (1.1.1)
+      rspec (>= 3.0)
     rubocop (1.66.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
@@ -154,6 +156,7 @@ DEPENDENCIES
   rspec
   rspec-its
   rspec-parameterized
+  rspec-temp_dir
   rubocop
   rubocop_auto_corrector
   serverspec

_tools/ruby_h_to_go/lib/ruby_h_to_go/cli.rb

@@ -30,13 +30,6 @@ def perform
       go_fmt
     end
 
-    private
-
-    # @return [RubyHeaderParser::Parser]
-    def parser
-      @parser ||= RubyHeaderParser::Parser.new(header_dir)
-    end
-
     def write_type_definitions_to_go_file
       type_definitions = parser.extract_type_definitions.map do |definition|
         RubyHToGo::TypeDefinition.new(definition:, header_dir:)
@@ -67,6 +60,13 @@ def write_function_definitions_to_go_file
       end
     end
 
+    private
+
+    # @return [RubyHeaderParser::Parser]
+    def parser
+      @parser ||= RubyHeaderParser::Parser.new(header_dir)
+    end
+
     # Clean all generated files in dist/
     def clean_generated_files
       FileUtils.rm_f(Dir.glob(File.join(dist_dir, "*.go")))

_tools/ruby_h_to_go/spec/ruby_h_to_go/cli_spec.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+RSpec.describe RubyHToGo::Cli do
+  include_context "uses temp dir"
+
+  let(:cli) do
+    RubyHToGo::Cli.new(
+      header_dir: RbConfig::CONFIG["rubyhdrdir"],
+      dist_dir:   temp_dir,
+    )
+  end
+
+  describe "#write_type_definitions_to_go_file" do
+    subject { cli.write_type_definitions_to_go_file }
+
+    it { expect { subject }.not_to raise_error }
+  end
+
+  describe "#write_struct_definitions_to_go_file" do
+    subject { cli.write_struct_definitions_to_go_file }
+
+    it { expect { subject }.not_to raise_error }
+  end
+
+  describe "#write_function_definitions_to_go_file" do
+    subject { cli.write_function_definitions_to_go_file }
+
+    it { expect { subject }.not_to raise_error }
+  end
+end

_tools/ruby_h_to_go/spec/spec_helper.rb

@@ -2,6 +2,7 @@
 
 require "rspec/its"
 require "rspec/parameterized"
+require "rspec/temp_dir"
 
 require_relative "../lib/ruby_header_parser"
 require_relative "../lib/ruby_h_to_go"