{"id":3693,"date":"2020-06-11T18:30:26","date_gmt":"2020-06-11T13:00:26","guid":{"rendered":"https:\/\/www.h2kinfosys.com\/blog\/?p=3693"},"modified":"2024-10-04T17:54:01","modified_gmt":"2024-10-04T12:24:01","slug":"parallel-test-execution-in-selenium-using-testng","status":"publish","type":"post","link":"https:\/\/www.h2kinfosys.com\/blog\/parallel-test-execution-in-selenium-using-testng\/","title":{"rendered":"Parallel Test Execution in Selenium using TestNG"},"content":{"rendered":"\n

What is Parallel Testing in TestNG?<\/strong><\/h2>\n\n\n\n

Parallel Testing is a technique where you want to run multiple tests simultaneously in different threads to reduce the execution time. It allows us to run multiple tests <\/a>at the same time across multiple environments instead of running tests one by one or in sequential order. Hence, it is called a parallel test execution in selenium.<\/p>\n\n\n\n

Parallel testing helps us to run classes, test methods, tests in parallel. We can reduce the execution time as tests will get executed simultaneously by using parallel test execution.<\/p>\n\n\n\n

How to execute Classes, Parallel Tests, & Test Methods in Selenium using TestNG XML File?<\/strong><\/h3>\n\n\n\n

In Selenium, by using the \u201cparallel\u201d attribute we can execute our classes, test methods, and tests in parallel for Test Suite in the testng.xml file. The parallel attribute for on the <suite> tag can accept one of the following values:<\/p>\n\n\n\n

    \n
  1. <suite name = “Parallel Test Suite” parallel = “methods” thread-count = “4”><\/li>\n\n\n\n
  2. <suite name = “Parallel Test Suite” parallel = “classes” thread-count = “4”><\/li>\n\n\n\n
  3. <suite name = “Parallel Test Suite” parallel = “tests” thread-count = “4”><\/li>\n\n\n\n
  4. <suite name = “Parallel Test Suite” parallel = “instances” thread-count = “4”><\/li>\n<\/ol>\n\n\n\n
      \n
    1. parallel = \u201cmethods\u201d:\u00a0<\/strong>TestNG will run all the methods in parallel annotated with @Test annotation in separate threads. Dependent methods will also run in separate threads in the specified order.<\/li>\n\n\n\n
    2. parallel = \u201cclasses\u201c:<\/strong>\u00a0TestNG will run all the test methods in the same class in the same thread but in a separate thread each Java class will get run.<\/li>\n\n\n\n
    3. parallel = \u201cTests\u201c:<\/strong>\u00a0TestNG will run all the test cases or test methods in the same <test> tag in the same thread but in different threads, each <test> tag will get run.<\/li>\n\n\n\n
    4. parallel = \u201cinstances\u201c:<\/strong>\u00a0TestNG will run all the test cases in the same instance in the same thread, but in different threads two methods on two different instances will get run.<\/li>\n<\/ol>\n\n\n\n
      \n