screenshot_spec.rb in watir-7.2.0

- old
+ new

@@ -1,10 +1,12 @@
+# frozen_string_literal: true
+
 require 'base64'
 require 'watirspec_helper'
 
 describe 'Watir::Screenshot' do
-  let(:png_header) { "\211PNG".force_encoding('ASCII-8BIT') }
+  let(:png_header) { (+"\211PNG").force_encoding('ASCII-8BIT') }
 
   describe '#png' do
     it 'gets png representation of screenshot' do
       expect(browser.screenshot.png[0..3]).to eq png_header
     end
@@ -21,9 +23,9 @@
     it 'saves screenshot to given file' do
       path = "#{Dir.tmpdir}/test#{Time.now.to_i}.png"
       expect(File).to_not exist(path)
       browser.screenshot.save(path)
       expect(File).to exist(path)
-      expect(File.open(path, 'rb', &:read)[0..3]).to eq png_header
+      expect(File.binread(path)[0..3]).to eq png_header
     end
   end
 end