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ed295f2 Feb 6, 2017
@mhoran @jferris @twalpole @nicholaides @mike-burns @JonRowe @eagletmt
104 lines (82 sloc) 2.7 KB
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)
<html>
<body>
<h1>Hello World</h1>
</body>
</html>
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
expect(@image[:format]).to eq "PNG"
end
it "width default to 1000px (with 15px less for the scrollbar)" do
expect(@image[:width]).to be < 1001
expect(@image[:width]).to be > 1000-17
end
it "height should be at least 10px" do
expect(@image[:height]).to 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
expect(@image[:width]).to eq 500
end
it "height should match the height given" do
expect(@image[:height]).to eq 400
end
it "should reset window dimensions to their default value" do
expect(driver.evaluate_script('window.innerWidth')).to eq 1680
expect(driver.evaluate_script('window.innerHeight')).to 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
expect(@image[:width]).to be > 50
end
it "height should be greater than the height given" do
expect(@image[:height]).to be > 10
end
it "should restore viewport dimensions after rendering" do
expect(driver.evaluate_script('window.innerWidth')).to eq 1680
expect(driver.evaluate_script('window.innerHeight')).to 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({})
expect(driver.evaluate_script('window.innerWidth')).to eq 800
expect(driver.evaluate_script('window.innerHeight')).to 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