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Custom Bitmap Checkpoint Comparison Algorithm in QTP 10

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You (or a third party) can now develop custom comparers for bitmap checkpoints. A custom comparer is a COM object that performs the bitmap comparison for the checkpoint according to your testing requirements. For example, you could define a custom comparer that allows a bitmap checkpoint to pass even if the image in the application shifts by an amount specified when the checkpoint is defined.

After you install and register a custom comparer on the QTP computer, your comparer is available for selection in the Bitmap Checkpoint Properties dialog box. The dialog box provides space for specifying additional configuration preferences expected by your comparer.

When QTP a bitmap checkpoint that uses a custom comparer, it supplies the expected and actual bitmaps to the custom comparer object. It then receives and reports the results that the custom compares returns.

Go back to -> New features in QTP 10