How can test case sequencing be controlled in Selenium TestNG without relying solely on the priority attribute?

Question

How can test case sequencing be controlled in Selenium TestNG without relying solely on the priority attribute?

If I have a test class with 10 tests, I can use the priority attribute to determine their order. Are there alternative methods for setting the priority of test cases?

selenium testng

Answer 1

Answer №1

Scenario: Test classes include @Test methods with specified priorities imported from org.testng.annotations.Test;

public class MyTests1 {

@Test(priority = 1)
public void test1() {
    System.out.println("Executing test1 in " + getClass().getSimpleName() + " class");
}

@Test(priority = 2)
public void test2() {
    System.out.println("Running test2 in " + getClass().getSimpleName() + " class");
}

}

This example also demonstrates:

@Test public void Test1() {

}

@Test(dependsOnMethods={"Test1"}) public void Test2() {

}

@Test(dependsOnMethods={"Test2"}) public void Test3() {

}

Answer 2

Scenario: Test classes include @Test methods with specified priorities imported from org.testng.annotations.Test;

public class MyTests1 {

@Test(priority = 1)
public void test1() {
    System.out.println("Executing test1 in " + getClass().getSimpleName() + " class");
}

@Test(priority = 2)
public void test2() {
    System.out.println("Running test2 in " + getClass().getSimpleName() + " class");
}

}

This example also demonstrates:

@Test public void Test1() {

}

@Test(dependsOnMethods={"Test1"}) public void Test2() {

}

@Test(dependsOnMethods={"Test2"}) public void Test3() {

}

Answer 3

Answer №2

TestNG utilizes Priority to suggest an order of execution, based on the priority assigned to each test. This is different from explicitly setting a specific order.

To establish a strict order for certain tests, Test Dependencies can be used. If TestA has priority=1 and TestB has priority=2, but A depends on B, then TestNG will prioritize running B first, regardless of the assigned priorities, in order to prevent failure of test A.

Combining both methods can result in a quasi "order of execution."

I respectfully disagree with JeffC's statement that tests should always be independent of each other. While this is generally true in unit testing, there are exceptions.

For instance:

@Test (priority=2)
public void validateAddingMilkToShoppingCart(){
  putMilkInCart();
  validateMilkIsInCart();
}

@Test (priority=1, dependsOnMethods = {"validateAddingMilkToShoppingCart"})
public void validateRemovingMilkToShoppingCart(){
  verifyMilkIsInCart();
  removeMilkFromCart();
  validateCartIsEmpty();
}

In this example, "validateRemovingMilkToShoppingCart" may have higher priority due to the current focus on emptying the shopping cart or recent associated bugs. However, it is essential to only run this test if the prerequisite - adding milk to the cart - has been successful. This approach saves time and resources by avoiding unnecessary failed tests. It also results in a cleaner report indicating a Skip if a feature couldn't be tested due to a bug identified in a previous test.

I hope this clarifies your inquiry.

Answer 4

TestNG utilizes Priority to suggest an order of execution, based on the priority assigned to each test. This is different from explicitly setting a specific order.

To establish a strict order for certain tests, Test Dependencies can be used. If TestA has priority=1 and TestB has priority=2, but A depends on B, then TestNG will prioritize running B first, regardless of the assigned priorities, in order to prevent failure of test A.

Combining both methods can result in a quasi "order of execution."

I respectfully disagree with JeffC's statement that tests should always be independent of each other. While this is generally true in unit testing, there are exceptions.

For instance:

@Test (priority=2)
public void validateAddingMilkToShoppingCart(){
  putMilkInCart();
  validateMilkIsInCart();
}

@Test (priority=1, dependsOnMethods = {"validateAddingMilkToShoppingCart"})
public void validateRemovingMilkToShoppingCart(){
  verifyMilkIsInCart();
  removeMilkFromCart();
  validateCartIsEmpty();
}

In this example, "validateRemovingMilkToShoppingCart" may have higher priority due to the current focus on emptying the shopping cart or recent associated bugs. However, it is essential to only run this test if the prerequisite - adding milk to the cart - has been successful. This approach saves time and resources by avoiding unnecessary failed tests. It also results in a cleaner report indicating a Skip if a feature couldn't be tested due to a bug identified in a previous test.

I hope this clarifies your inquiry.

How can test case sequencing be controlled in Selenium TestNG without relying solely on the priority attribute?

Answer №1

Answer №2

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