![]() To make your tests ignore such dissimilarities, use the PixelTolerance parameter. This can make captured screenshots differ slightly from time to time. A Flash or Flex application can implement custom smoothing algorithms that improve smoothing or transform images in a certain way.See topics of the Preparing Web Browsers section. The best practice for creating automated tests is to disable all add-ons except for those that are required by the tested application. If the plugin is installed on one test computer and is absent on other test computers, this can make image comparison fail. If your tests fail in Internet Explorer 11 due to font smoothing, use the PixelTolerance comparison parameter.Ī web browser can have installed add-ons that implement custom smoothing algorithms. ![]() As a result, web page screenshots captured in Internet Explorer 11 can differ from those captured in earlier Internet Explorer versions and in other browsers. For example, the recent versions always use font smoothing and they do not have the Always use ClearType for HTML option anymore. Internet Explorer 11 render text in a way that differs from how earlier Internet Explorer versions do this. You may face one of the following problems: Note that some applications may use custom smoothing algorithms, so the system’s font smoothing setting does not affect them. Read the Ignoring a slight difference between images section of the Comparing and Finding Images - Specific Tasks topic for more information. To ignore dissimilarities between smoothed and monocolor text, you can use the PixelTolerance comparison parameter. Rounded Window Corners in Windows XP Theme Read the Comparing and finding images when the Aero theme is active section of the Comparing and Finding Images - Specific Tasks topic for more information. Select a UI theme other than Aero (if possible). Thus, the comparison will be performed taking into account the transparency level of each pixel.Ĭreate a comparison mask that denotes which areas should be compared and pass it via the Mask parameter.įill the opaque areas and the upper-left pixel of the baseline image with a solid color and enable the Transparent parameter. Save the baseline image including the alpha channel. Test Visualizer always captures window images as they are. Note: This option does not affect images captured by the Test Visualizer subsystem. To do this, enable the Disable DWM before capturing image option in your TestComplete project. You can also configure TestComplete to disable the Desktop Windows Manager automatically. There are several ways to avoid problems during comparison under these operating systems:ĭisable the Desktop Window Manager (DWM) component.
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