Working with Tosca Parameters (Buffer, Dynamic Expressions)

🧪 Working with Tosca Parameters (Buffer, Dynamic Expressions)

In Tricentis Tosca, parameters help you make your tests flexible, reusable, and data-driven. Two powerful types of parameters in Tosca are:


Buffers


Dynamic Expressions


Let’s understand each one and how to use them effectively.


🟦 1. What is a Buffer in Tosca?

A Buffer is a temporary in-memory storage used to store values during test execution. You can store a value in a buffer and then reuse it anywhere in your test case.


🔹 When to use:

Save a value from one step and reuse it later


Pass values between test steps or modules


Dynamically build test data


✅ How to Create a Buffer

In a Tosca TestStep, you use the syntax:


text

Copy

Edit

=>BufferName

This saves a value to a buffer.


Example:

Capture an Order ID after placing an order:


text

Copy

Edit

ActionMode: Buffer

Value: =>OrderID

This stores the Order ID in a buffer named OrderID.


✅ How to Use a Buffer

You can reuse the buffer value like this:


text

Copy

Edit

{B[OrderID]}

This fetches the current value of the buffer.


Example:

text

Copy

Edit

Search Order: {B[OrderID]}

🟩 2. What are Dynamic Expressions?

Dynamic Expressions in Tosca allow you to calculate values at runtime, such as dates, random numbers, string manipulation, etc.


🔹 Syntax:

text

Copy

Edit

{X[<Expression>]}

✅ Common Dynamic Expressions

Purpose Expression Example Output

Current Date {X[Date]} 2025-06-16

Add Days to Date {X[Date + 3]} 2025-06-19

Random Number {X[RandomNumber(1000,9999)]} 5732

Random String {X[RandomString(8)]} aB3xGz9K

Combine Strings {X["User_" + RandomString(4)]} User_K3fL


✅ Use Case Example: Generate a Random Email

text

Copy

Edit

{X["user" + RandomNumber(1000,9999) + "@test.com"]}

Might result in:


css

Copy

Edit

user7584@test.com

🧠 Combine Buffers and Dynamic Expressions

You can store a dynamic value in a buffer for later use:


text

Copy

Edit

=>UserEmail

Value: {X["user" + RandomNumber(1000,9999) + "@mail.com"]}

Later use it as:


text

Copy

Edit

Send to: {B[UserEmail]}

🧰 Practical Use Cases

Task Tool

Store login token for reuse Buffer

Generate unique usernames/emails Dynamic Expressions

Save user ID from registration Buffer

Get today’s or tomorrow’s date Dynamic Expression {X[Date + 1]}

Combine values Buffers + Expressions


✅ Summary

Feature Purpose Syntax Example

Buffer Save and reuse test data at runtime =>MyValue / {B[MyValue]}

Dynamic Expression Generate or calculate data dynamically {X[Date + 3]} or {X[RandomString(6)]}

Comments

Post a Comment

Popular posts from this blog

How to Install and Set Up Selenium in Python (Step-by-Step)

 Here’s your step-by-step guide to installing and setting up Selenium in Python — perfect if you're just getting started with browser automation. 🚀 🐍 Step 1: Install Python If you haven’t already: Download Python: https://www.python.org/downloads/ Make sure to check the box "Add Python to PATH" during installation Verify installation: bash Copy Edit python --version pip --version 📦 Step 2: Install Selenium Library Open your terminal or command prompt and run: bash Copy Edit pip install selenium To verify: bash Copy Edit pip show selenium 🌐 Step 3: Download WebDriver for Your Browser Depending on what browser you want to automate: 🔹 Chrome: Download ChromeDriver: ➡️ https://sites.google.com/chromium.org/driver/ Make sure the driver version matches your installed Chrome version. 🔹 Firefox: Download GeckoDriver: ➡️ https://github.com/mozilla/geckodriver/releases Unzip and place the executable somewhere on your system, like: Windows: C:\WebDrivers\ Mac/Linux: /usr/local...
Read more

Feeling Stuck in Manual Testing? Here’s Why You Should Learn Automation Testing

Feeling Stuck in Manual Testing? Here’s Why You Should Learn Automation Testing Are you feeling like your manual testing career is hitting a ceiling? You’re not alone. Many QA professionals start their careers in manual testing but soon realize the need to level up. If you’re wondering what’s next, automation testing might just be the breakthrough you need. Why Manual Testing Isn’t Enough Anymore Manual testing is essential, especially in exploratory, usability, and ad-hoc testing scenarios. But as applications grow more complex and development cycles become shorter, manual testing can’t keep up. Companies are looking for faster, more efficient testing methods—and that’s where automation comes in. Here are a few signs that you're stuck in manual testing: Repeating the same test cases for every build Working on tight deadlines with limited test coverage Seeing peers move ahead with automation skills Lack of growth in responsibilities or pay scale If any of this sounds familiar, it...
Read more

A Beginner's Guide to ETL Testing: What You Need to Know

A Beginner's Guide to ETL Testing: What You Need to Know Introduction: Understanding the Importance of ETL Testing Have you ever wondered how data gets from one place to another in a way that is both reliable and accurate? What happens when that data is transferred and transformed between systems? The answer lies in the ETL (Extract, Transform, Load) process, a crucial part of data management in many industries. But, how do we ensure that data is being handled correctly in this intricate process? Enter ETL testing. ETL testing is vital for ensuring that your data pipeline is working as expected. But as a beginner, where do you start? What should you focus on? This guide will answer these questions and more, helping you build a solid foundation for mastering ETL testing. Whether you're a data engineer, quality assurance professional, or anyone working with data, this article will provide insights into how ETL testing works, why it's important, and the best practices you need...
Read more