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Learn how to effectively pass global list variables to Get and Set functions in Robot Framework. This guide simplifies the process with clear examples.
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How to Pass a Specific Global List Variable to Get and Set Functions

In the realm of automation testing with Robot Framework, managing variables efficiently is crucial. Particularly, you may find yourself needing to pass a specific global list variable to your functions, which can be slightly tricky if you're not familiar with the syntax and structure. Let’s dive into this problem.

The Problem

Suppose you have a list of file names stored in a variable called @{Files}, which includes entries like dinosaur.txt, bird.txt, and more. You wish to retrieve the version of a specific file (e.g., dinosaur.txt) using a function called Get the File Version and then set that version to a test variable.

The initial confusion often arises in how to correctly pass the list items to the function calls with the correct syntax. So, how do we achieve this?

Understanding Robot Framework Lists

In Robot Framework, list variables come with two primary ways to reference them:

When referencing as ${mylist}, you are interacting with the underlying Python list object.

When using @{mylist}, you are expanding all elements of that list.

Understanding this distinction is vital for correctly passing your variables around.

Solution Breakdown

We can implement a working example to demonstrate how to effectively use the Get and Set functions with list variables.

Step 1: Set Up Your Environment

Ensure you have a file named dinosaur.txt in your working directory. This file will be used to test our version retrieval.

Step 2: Write the Test Cases

Here’s the code that fulfills our requirements:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Explanation of Code

Create List: Initializes @{Files} with the names of the files.

Get the File Version: A keyword that takes a filename, checks its existence, and retrieves the last modified time.

Logging Versions: It logs the version of each file iteratively.

Setting Test Variables: Finally, it sets the list variable for later use.

Key Functions Explained

Get the File Version:

Accepts a file name as an argument.

Checks if the file exists.

Gets the modified time if the file is present, splits it to retrieve the date, and returns the version.

File is Present:

This checks for the file's existence and returns true or false.

Conclusion

Managing global list variables and passing them into Get and Set functions doesn’t have to be complex. Remember the difference between ${} and @{} in Robot Framework, and structure your test cases clearly. This understanding will help you create maintainable and effective automation tests.

By implementing the code outlined in this post, you can confidently pass specific list variables to your Robot Framework functions.