What is the Test Case?

A TEST CASE is a set of actions executed to verify a particular feature or functionality of your software application. A Test Case contains test steps, test data, precondition, postcondition developed for specific test scenario to verify any requirement. The test case includes specific variables or conditions, using which a testing engineer can compare expected and actual results to determine whether a software product is functioning as per the requirements of the customer.

What is a Test Scenario?

A Test Scenario is defined as any functionality that can be tested. It is a collective set of test cases which helps the testing team to determine the positive and negative characteristics of the project.

Test Scenario gives a high-level idea of what we need to test.

Example of Test Scenario

For an eCommerce Application, a few test scenarios would be

Test Scenario 1: Check the Search Functionality

Test Scenario 2: Check the Payments Functionality

Test Scenario 3: Check the Login Functionality

Example of Test Cases

Test cases for the Test Scenario: "Check the Login Functionality" would be

  1. Check system behavior when valid email id and password is entered.
  2. Check system behavior when invalid email id and valid password is entered.
  3. Check system behavior when valid email id and invalid password is entered.
  4. Check system behavior when invalid email id and invalid password is entered.
  5. Check system behavior when email id and password are left blank and Sign in entered.
  6. Check Forgot your password is working as expected
  7. Check system behavior when valid/invalid phone number and password is entered.
  8. Check system behavior when "Keep me signed" is checked

Why do we write Test Cases?

Here, are some important reasons to create a Test Case-

  • Test cases help to verify conformance to applicable standards, guidelines and customer requirements
  • Helps you to validate expectations and customer requirements
  • Increased control, logic, and data flow coverage
  • You can simulate 'real' end user scenarios
  • Exposes errors or defects
  • When test cases are written for test execution, the test engineer's work will be organized better and simplified

Why do we write Test Scenario?

Here, are important reasons to create a Test Scenario:

  • The main reason to write a test scenario is to verify the complete functionality of the software application
  • It also helps you to ensure that the business processes and flows are as per the functional requirements
  • Test Scenarios can be approved by various stakeholders like Business Analyst, Developers, Customers to ensure the Application Under Test is thoroughly tested. It ensures that the software is working for the most common use cases.
  • They serve as a quick tool to determine the testing work effort and accordingly create a proposal for the client or organize the workforce.
  • They help determine the most critical end-to-end transactions or the real use of the software applications.
  • Once these Test Scenarios are finalized, test cases can be easily derived from the Test Scenarios.

Test case vs. Test scenario

Here, are significant differences between Test scenario and a Test Case

Test Scenario Test Case
A test scenario contains high-level documentation which describes an end to end functionality to be tested. Test cases contain definite test steps, data, expected results for testing all the features of an application.
It focuses on more "what to test" than "how to test". A complete emphasis on "what to test" and "how to test.".
Test scenarios are a one-liner. So, there is always the possibility of ambiguity during the testing. Test cases have defined a step, pre-requisites, expected result, etc. Therefore, there is no ambiguity in this process.
Test scenarios are derived from test artifacts like BRS, SRS, etc. Test case is mostly derived from test scenarios. Multiple Test case can be derived from a single Test Scenario
It helps in an agile way of testing the end to end functionality It helps in exhaustive testing of an application
Test scenarios are high-level actions. Test cases are low-level actions.
Comparatively less time and resources are required for creating & testing using scenarios. More resources are needed for documentation and execution of test cases.

Best practices of Creating Test cases

Test Case Example
  • Test Cases should be transparent and straightforward
  • Create Test Case by keeping the end user in the mind
  • Avoid test case repetition
  • You need to make sure that you will write test cases to check all software requirements mentioned in the specification document
  • Never assume functionality and features of your software application while preparing a test case
  • Test Cases must be readily identifiable

Best practices of creating a Test Scenario

Test Scenario Example
  • Test scenarios are mostly single line statement that tells what should be tested
  • Scenario description should be simple and easy to understand
  • A careful assessment of the stated requirements should be done
  • The required tools and resources for testing need to be accumulated before the beginning of the testing process

KEY DIFFERENCE

  • Test Case is a set of actions executed to verify particular features or functionality whereas Test Scenario is any functionality that can be tested.
  • Test Case is mostly derived from test scenarios while Test Cases derived from test artifacts like BRS and SRS.
  • Test Case helps in exhaustive testing of an application whereas Test Scenario helps in an agile way of testing the end to end functionality.
  • Test Cases are focused on what to test and how to test while Test Scenario is more focused on what to test.
  • Test Cases are low-level actions whereas Test Scenarios are high-level actions.
  • Test Case requires more resources and time for test execution while Test Scenario require fewer resources and time for test execution.
  • Test Case includes test steps, data, expected results for testing whereas Test Scenario includes an end to end functionality to be tested.

 

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