Hello.
Sometimes it is nice to compare two images with one another. We find this particularly handy for testing browser screenshots.
With Symilaa, this is particularly easy.
-
How to do it.
```ruby one = Symilaa::Image.new ‘image.png’ two = Symilaa::Image.new ‘slightly_different_image.png’ three = Symilaa::Image.new ‘very_different_image.png’
one == one #=> true one == two #=> false one.similar_to? two #=> true one.similar_to? three #=> false ``` That’s it. Have a nice life.
ComparisonSupport also provides a module for use with Cucumber testing.
Use ComparisonSupport#check_screen_against_reference_shot to take a screenshot of the current page under test
and compare it with an existing reference screenshot.
NOTE
You must include the following in your features/support/env.rb: ```ruby Before do |scenario| @gherkin_statement = scenario.gherkin_statement.name if scenario.respond_to?(‘gherkin_statement’) @gherkin_statement = scenario.scenario_outline.gherkin_statement.name if scenario.respond_to?(‘scenario_outline’) end
FileUtils.rm_rf ‘artifacts/screenshots_generated_this_run’ ```