Difference between Parallelization vs Serialization

Parallelization aims to improve test performance by executing tests simultaneously, while serialization ensures that tests are executed one after another. The choice of this method depends on factors such as the needs of the test, available resources, and execution speed.

Parallelization

Serialization

In parallelization, multiple tests run simultaneously across different environments or configurations, reducing overall test execution time.

Serialization involves executing tests one after the other without overlapping with test execution.

This approach uses a testing framework such as TestNG to distribute test data across multiple threads, processes, or machines.

Tests are executed sequentially, with each test starting only after the previous one has finished, preventing overlap between test executions.

Parallelization can reduce execution times, especially for high-pressure tests or cross-browser tests.

Serialization is easier but potentially slower, especially for many tests or long tests.

The use and control of parallelism will include monitoring parallel work and ensuring parallelism of tests.

Serialization is easier to implement and manage because tests run without having to deal with compatibility issues.

Parallelization works well in situations where efficiency is required, such as managing multiple tests or running cross-browser tests.

For simpler tests or where specifying the application is important, serialization may be the preferred method. This option is important for the ease and speed of management, it speeds up the process for better management.

Serialization refers to the process of executing operations one by one in a thread of execution. In short, tasks are performed sequentially and each task starts only after the completion of the previous task.

Serialization

Parallelization means executing a series of tasks on multiple threads, where one task is assigned to one thread. So these tasks are done together. This approach makes better use of multiple CPU cores and can improve application performance and performance.

Parallelization

Parallel Testing with Selenium

In parallel testing, multiple tests can be run simultaneously in different execution modes, reducing execution time. This approach is particularly useful when running tests across multiple browsers or operating systems because it simplifies cross-browser testing. TestNG is often used with Selenium to provide seamless integration for execution.

Table of Content

  • Parallel Testing using Selenium and TestNG
  • Difference between Parallelization vs Serialization
  • Time Taken Report of Parallelization vs Serialization
  • Advantages of Parallel Testing
  • Disadvantages of Parallel Testing
  • Conclusion
  • FAQs

Using parallel behavior in the TestNG.xml configuration file, TestNG can execute independent tests in parallel, simplifying the testing process and increasing efficiency.

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Parallel Testing using Selenium and TestNG

Parallel execution is a very important concept in the field of automated testing. All the work we do at the same time always saves time. Similarly, in end-to-end testing of an application, running tests in parallel instead of sequentially saves us completion time; This will save us more time in the remaining stages of the software testing lifecycle and application delivery....

Difference between Parallelization vs Serialization

Parallelization aims to improve test performance by executing tests simultaneously, while serialization ensures that tests are executed one after another. The choice of this method depends on factors such as the needs of the test, available resources, and execution speed....

Time Taken Report of Parallelization vs Serialization

Consider the case where we have code with two test methods. This process will run simultaneously in two different browsers: one test will run in Chrome and the other test will run in Firefox. This setup illustrates how parallelization enhances testing speed and provide a better return on investment (ROI)....

Advantages of Parallel Testing

Reduced Execution Time: Parallel testing reduces total test execution time by running multiple tests simultaneously, making it especially useful for large test runs or multi-type setups. Allow Multi-Threaded Tests: TestNG’s parallel execution enables simultaneous running of multiple threads on test cases, fostering independence in executing different software components.Detect Issue: Parallel testing makes it easier to find the problem faster by providing rapid feedback on usage behavior in various situations, enabling timely solutions and reducing project time and associated costs....

Disadvantages of Parallel Testing

Dependent module failed: Parallel testing allows independent modules to be run simultaneously, but often results in failure when modules are interdependent. This problem often arises during experiments that must be completed or sacrificed for independence, both of which require more time and effort.Debugging Complexity: Debugging parallel tests can be challenging due to concurrent execution, requiring more effort and time to pinpoint the root cause of failures or unexpected behavior.Program flow information: To create a balanced testing model, testers need to have a deep understanding of the flow. Even the slightest interdependence can destroy the entire successful experiment. Testers need to know which modules must run simultaneously and which modules must follow a pattern to ensure proper operation....

Conclusion

We have probably mentioned all the scenarios that a software tester must handle during the testing phase of parallel testing. Integrated testing is possible when cross-browser testing is required; This requires installing Selenium Grid or accessing a cloud-based platform that provides you with Selenium Grid to run automated tests in parallel or in conjunction with different configurations. Integrated testing not only saves testers’ time, but also speeds up the delivery process following good results of verification and validation during testing. Try to improve your automated tests....

FAQs

Q.1 What is Parallel Testing in Selenium?...