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How To Automate Postman Using Uft

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Automating Postman for API Testing with UFT

Integrating Postman with UFT (Unified Functional Testing) can significantly enhance your API testing workflow by leveraging the power of UFT’s scripting capabilities and streamlined reporting features. Here’s a comprehensive guide on how to effectively automate Postman using UFT:

1. Setting Up Your Environment

Before diving into automation, make sure you have the following prerequisites in place:

  • UFT: Install the latest version of UFT (Unified Functional Testing) on your machine.
  • Postman: Download and install the Postman application.
  • Postman API Client: This is a crucial component for UFT to interact with Postman. You can download it from the Postman website. (https://www.postman.com/)
  • Postman Collection: Create a Postman Collection containing the API requests you want to automate, along with any associated environment variables and data files.

2. Creating a UFT Script for Postman Automation

Let’s create a UFT script that interacts with your Postman Collection.

Step 1: Connect to Postman

' Include the Postman API Client library
Set postman = CreateObject("Postman.PostmanClient")


' Set the path to your Postman Collection file
postman.CollectionPath = "C:\MyPostmanCollection\collection.json"


' Load the collection
postman.LoadCollection()

Step 2: Execute a Request in the Collection

' Get the request object
Set requestObject = postman.GetRequestByName("MyTestRequest")


' Set any needed request parameters
requestObject.Headers.Add "Content-Type", "application/json"


' Execute the request
Set response = requestObject.ExecuteRequest()


' Get the response details
responseStatus = response.StatusCode
responseHeaders = response.Headers
responseBody = response.Body

Step 3: Handling Assertions and Validations

' Assert response status code
If responseStatus <> 200 Then
    ' Raise an error or log a failure
    MsgBox "Response status code is not 200: " & responseStatus
    ' You can also use UFT's built-in reporting mechanisms to log this failure
End If


' Validate data within the response body
If InStr(responseBody, "expectedValue") = 0 Then
    ' Raise an error or log a failure
    MsgBox "Expected value not found in response body."
    ' You can also use UFT's built-in reporting mechanisms to log this failure
End If

Step 4: Storing Results and Reporting

' Use UFT's reporting capabilities to log test results
Reporter.ReportEvent micPass, "API Test Passed", "The request was successful and all assertions passed."
' Alternatively, you can create custom reports using UFT's scripting features

3. Handling Dynamic Values and Data-Driven Testing

Step 1: Using Environment Variables

For dynamic values used across different API requests, utilize Postman’s “Environment” feature.

  • Create an environment in Postman.
  • In your UFT script, use postman.SetEnvironmentVariable("variableName", "variableValue") to set the value of an environment variable.

Step 2: Data-Driven Testing

To perform data-driven testing with UFT and Postman:

  • Use a data source (like a CSV file) to store various test data sets.
  • Loop through the data source in your UFT script.
  • For each data row, set the corresponding values as request parameters or environment variables.
  • Execute the Postman collection and perform validation checks.

Example:

' Assume your CSV file has columns: "userName", "password"
Set dataFile = CreateObject("Scripting.FileSystemObject").OpenTextFile("C:\MyTestData.csv")


Do Until dataFile.AtEndOfStream
    testDataRow = Split(dataFile.ReadLine, ",")


    ' Set variables in your Postman environment
    postman.SetEnvironmentVariable("username", testDataRow(0))
    postman.SetEnvironmentVariable("password", testDataRow(1))


    ' Execute the request
    '... (your request execution code)


    ' Perform validations
    '... (your validation checks)
Loop


dataFile.Close

4. Leveraging UFT for Powerful Reporting and Integration

  • UFT Test Results: UFT provides a comprehensive test reporting mechanism, capturing test execution details, passed/failed assertions, and error logs.
  • Integration with CI/CD: Seamlessly integrate UFT within your CI/CD pipeline for automated execution and reporting of API tests.

5. Addressing Common Challenges

  • Security: If your Postman Collection requires authentications, manage credentials securely using environment variables in Postman and UFT variables.
  • Performance Testing: Utilize UFT’s built-in performance testing features to measure response times and identify performance bottlenecks in your APIs.
  • Debugging: UFT provides helpful debugging tools and error logging capabilities to quickly resolve any issues with your scripts.

By mastering these methods, you can harness the power of UFT to establish comprehensive API testing frameworks, ensuring your APIs are reliable, performant, and secure.

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