1. Select ActiveMerge in the Runs tab of the Preferences dialog box to turn on the ActiveMerge feature.
2. Create a merged coverage dataset that includes the test runs that you want to evaluate.
You can create this dataset automatically, as you run the tests, with Auto Merge. You can also create it after you have run the tests using the Merge command. The Navigator entry for the merged file is followed by a list of layers, each layer containing the coverage data for one of the test runs.
3. To see which test runs covered specific functions, open the Coverage Browser or the Function List window. Select a function in the windows.
If a test run has hit the function you select, the check next to the run turns blue .
If the run has not hit the function, it turns red .
4. To see which test runs covered specific lines, open the Annotated Source window. Select a line. Again, the color of the check indicates whether the run has tested the line.
5. To check the statistical contribution of a given test run to total coverage, open the Coverage Browser or the Function List window for the merged run. Click a layer to remove or add back the data for the corresponding test run. The data in the Coverage Browser or Function List window adjusts to show the effect of the change.
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