Exercise 4c: Parameterize a test with multiple sources using a custom expression

In the previous exercises, you learned how link test step property values to a data source or the output of a previous step.

However, there will be times where the step value comes from a variety of places: entering a static value manually, a data source, and/or the output of a previous step. In these cases, you can create a custom expression to link to multiple sources.

In this exercise, you will create a custom expression to write to a file the result of the string replacement operation that uses data from the test's data table, manual entry of a static text string, and the output of another test step.