Fix missing require 'pathname' in attachment.rb

lib/ruby_llm/attachment.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'pathname'
+
 module RubyLLM
   # A class representing a file attachment.
   class Attachment

spec/ruby_llm/attachment_spec.rb

@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe RubyLLM::Attachment do
+  let(:image_path) { File.expand_path('../fixtures/ruby.png', __dir__) }
+  let(:text_path) { File.expand_path('../fixtures/ruby.txt', __dir__) }
+  let(:image_url) { 'https://example.com/image.png' }
+
+  describe 'initialization with file path' do
+    it 'creates an attachment from a file path string' do
+      attachment = described_class.new(image_path)
+
+      expect(attachment.source).to be_a(Pathname)
+      expect(attachment.path?).to be true
+      expect(attachment.url?).to be false
+      expect(attachment.filename).to eq('ruby.png')
+    end
+
+    it 'handles text file paths' do
+      attachment = described_class.new(text_path)
+
+      expect(attachment.source).to be_a(Pathname)
+      expect(attachment.path?).to be true
+      expect(attachment.mime_type).to eq('text/plain')
+    end
+
+    it 'distinguishes between paths and URLs' do
+      path_attachment = described_class.new(image_path)
+      url_attachment = described_class.new(image_url)
+
+      expect(path_attachment.path?).to be true
+      expect(path_attachment.url?).to be false
+
+      expect(url_attachment.url?).to be true
+      expect(url_attachment.path?).to be false
+    end
+  end
+
+  describe 'initialization with Pathname' do
+    it 'accepts a Pathname object directly' do
+      pathname = Pathname.new(image_path)
+      attachment = described_class.new(pathname)
+
+      expect(attachment.source).to be_a(Pathname)
+      expect(attachment.path?).to be true
+      expect(attachment.filename).to eq('ruby.png')
+    end
+  end
+
+  describe 'initialization with URL' do
+    it 'creates an attachment from a URL string' do
+      attachment = described_class.new(image_url)
+
+      expect(attachment.source).to be_a(URI::HTTPS)
+      expect(attachment.url?).to be true
+      expect(attachment.path?).to be false
+      expect(attachment.filename).to eq('image.png')
+    end
+  end
+end