require 'spec_helper' require 'capybara/webkit/driver' require 'mini_magick' describe Capybara::Webkit::Driver, "rendering an image" do include AppRunner let(:driver) do driver_for_html(<<-HTML)

Hello World

HTML end before(:each) do # Set up the tmp directory and file name tmp_dir = File.join(PROJECT_ROOT, 'tmp') FileUtils.mkdir_p tmp_dir @file_name = File.join(tmp_dir, 'render-test.png') driver.visit("#{AppRunner.app_host}/") end def render(options) FileUtils.rm_f @file_name driver.save_screenshot @file_name, options @image = MiniMagick::Image.open @file_name end context "with default options" do before { render({}) } it "should be a PNG" do @image[:format].should eq "PNG" end it "width default to 1000px (with 15px less for the scrollbar)" do @image[:width].should be < 1001 @image[:width].should be > 1000-17 end it "height should be at least 10px" do @image[:height].should be >= 10 end end context "with dimensions set larger than necessary" do before { render(:width => 500, :height => 400) } it "width should match the width given" do @image[:width].should eq 500 end it "height should match the height given" do @image[:height].should eq 400 end it "should reset window dimensions to their default value" do driver.evaluate_script('window.innerWidth').should eq 1680 driver.evaluate_script('window.innerHeight').should eq 1050 end end context "with dimensions set smaller than the document's default" do before { render(:width => 50, :height => 10) } it "width should be greater than the width given" do @image[:width].should be > 50 end it "height should be greater than the height given" do @image[:height].should be > 10 end it "should restore viewport dimensions after rendering" do driver.evaluate_script('window.innerWidth').should eq 1680 driver.evaluate_script('window.innerHeight').should eq 1050 end end context "with a custom viewport size" do before { driver.resize_window(800, 600) } it "should restore viewport dimensions after rendering" do render({}) driver.evaluate_script('window.innerWidth').should eq 800 driver.evaluate_script('window.innerHeight').should eq 600 end end context "with invalid filepath" do before do @file_name = File.dirname(@file_name) end it "raises an InvalidResponseError" do expect { render({}) }.to raise_error(Capybara::Webkit::InvalidResponseError) end end end