mashhoodr · November 22, 2017 19:06 · May 29, 2014 · Mar 12, 2014 · Mar 12, 2014 · Mar 12, 2014
diff --git a/compare.rb b/compare.rb
@@ -22,7 +22,9 @@ def compare_image(image1, image2)
         g(pixel) + g(images.last[x,y]) - 2 * [g(pixel), g(images.last[x,y])].min,
         b(pixel) + b(images.last[x,y]) - 2 * [b(pixel), b(images.last[x,y])].min
       )
-      if images.last[x,y] == 255
+
+      # Count all the black pixels
+      if r(cropped_images.last[x,y]) == 0 && b(cropped_images.last[x,y]) == 0 && g(cropped_images.last[x,y]) == 0
         count = count + 1
       end
     end
@@ -93,4 +95,4 @@ def setup_comparison_url(url, percentageVariance)
 
 Then(/^I expect atmost "(.*?)" difference when comparing with url "(.*?)"$/) do |percentageVariance, url|
   setup_comparison_url(url, percentageVariance.to_i)
-end
+end
diff --git a/compare.rb b/compare.rb
@@ -1,16 +1,3 @@
-#
-# needs the oily_png gem as well.
-#
-# Defined macros:
-# Then I compare the screen with "login_screen.png"
-# Then I expect atmost "2%" difference when comparing with "login_screen_fail.png"
-# Then I compare the screen with url "http://dev.marketlytics.com/login_screen.png"
-# Then I expect atmost "2%" difference when comparing with url "http://dev.marketlytics.com/login_screen_fail.png"
-#
-# For local file comparisons place your files under a folder called screens
-#
-
-
 require 'oily_png'
 require 'open-uri'
 include ChunkyPNG::Color

diff --git a/compare.rb b/compare.rb
@@ -1,3 +1,16 @@
+#
+# needs the oily_png gem as well.
+#
+# Defined macros:
+# Then I compare the screen with "login_screen.png"
+# Then I expect atmost "2%" difference when comparing with "login_screen_fail.png"
+# Then I compare the screen with url "http://dev.marketlytics.com/login_screen.png"
+# Then I expect atmost "2%" difference when comparing with url "http://dev.marketlytics.com/login_screen_fail.png"
+#
+# For local file comparisons place your files under a folder called screens
+#
+
+
 require 'oily_png'
 require 'open-uri'
 include ChunkyPNG::Color
@@ -44,17 +57,25 @@ def get_screenshot_name(folder, fileName)
   foundName
 end
 
-def setup_comparison(fileName, percentageVariance)
+def setup_comparison(fileName, percentageVariance, forNotCase = false)
   screenshotFileName = "compare_#{fileName}"
   screenshot({ :prefix => "screens/", :name => screenshotFileName })
 
   screenshotFileName = get_screenshot_name("screens/", screenshotFileName)
   changed = compare_image(fileName, screenshotFileName)
   FileUtils.rm("screens/#{screenshotFileName}")
 
-  if changed.to_i > percentageVariance
+  assert = true
+  if forNotCase
+    assert = changed.to_i < percentageVariance
+  else
+    assert = changed.to_i > percentageVariance
+  end
+
+  if assert
     fail(msg="Error. The screen shot was different from the source file. Difference: #{changed.to_i}%")
   end
+
 end
 
 def setup_comparison_url(url, percentageVariance)
@@ -75,10 +96,14 @@ def setup_comparison_url(url, percentageVariance)
   setup_comparison_url(url, 0)
 end
 
+Then(/^the screen should not match with "(.*?)"$/) do |fileName|
+  setup_comparison(fileName, 0, true)
+end
+
 Then(/^I expect atmost "(.*?)" difference when comparing with "(.*?)"$/) do |percentageVariance, fileName|
   setup_comparison(fileName, percentageVariance.to_i)
 end
 
 Then(/^I expect atmost "(.*?)" difference when comparing with url "(.*?)"$/) do |percentageVariance, url|
   setup_comparison_url(url, percentageVariance.to_i)
-end
+end
diff --git a/compare.rb b/compare.rb
@@ -0,0 +1,84 @@
+require 'oily_png'
+require 'open-uri'
+include ChunkyPNG::Color
+
+def starts_with(item, prefix)
+  prefix = prefix.to_s
+  item[0, prefix.length] == prefix
+end
+
+# compares two images on disk, returns the % difference
+def compare_image(image1, image2)
+  images = [
+    ChunkyPNG::Image.from_file("screens/#{image1}"),
+    ChunkyPNG::Image.from_file("screens/#{image2}")
+  ]
+  count=0
+  images.first.height.times do |y|
+    images.first.row(y).each_with_index do |pixel, x|
+
+      images.last[x,y] = rgb(
+        r(pixel) + r(images.last[x,y]) - 2 * [r(pixel), r(images.last[x,y])].min,
+        g(pixel) + g(images.last[x,y]) - 2 * [g(pixel), g(images.last[x,y])].min,
+        b(pixel) + b(images.last[x,y]) - 2 * [b(pixel), b(images.last[x,y])].min
+      )
+      if images.last[x,y] == 255
+        count = count + 1
+      end
+    end
+  end
+
+  100 - ((count.to_f / images.last.pixels.length.to_f) * 100);
+end
+
+# find the file
+def get_screenshot_name(folder, fileName)
+  foundName = fileName
+  Dir.foreach('screens/') do |item|
+  next if item == '.' or item == '..'
+    if item.start_with? fileName.split('.')[0]
+      foundName = item
+    end
+  end
+
+  foundName
+end
+
+def setup_comparison(fileName, percentageVariance)
+  screenshotFileName = "compare_#{fileName}"
+  screenshot({ :prefix => "screens/", :name => screenshotFileName })
+
+  screenshotFileName = get_screenshot_name("screens/", screenshotFileName)
+  changed = compare_image(fileName, screenshotFileName)
+  FileUtils.rm("screens/#{screenshotFileName}")
+
+  if changed.to_i > percentageVariance
+    fail(msg="Error. The screen shot was different from the source file. Difference: #{changed.to_i}%")
+  end
+end
+
+def setup_comparison_url(url, percentageVariance)
+  fileName = "tester.png"
+  open("screens/#{fileName}", 'wb') do |file|
+    file << open(url).read
+  end
+
+  setup_comparison(fileName, percentageVariance)
+  FileUtils.rm("screens/#{fileName}")
+end
+
+Then(/^I compare the screen with "(.*?)"$/) do |fileName|
+  setup_comparison(fileName, 0)
+end
+
+Then(/^I compare the screen with url "(.*?)"$/) do |url|
+  setup_comparison_url(url, 0)
+end
+
+Then(/^I expect atmost "(.*?)" difference when comparing with "(.*?)"$/) do |percentageVariance, fileName|
+  setup_comparison(fileName, percentageVariance.to_i)
+end
+
+Then(/^I expect atmost "(.*?)" difference when comparing with url "(.*?)"$/) do |percentageVariance, url|
+  setup_comparison_url(url, percentageVariance.to_i)
+end
No results found