Selenium is a web automation tool. It starts a web browser and any task that can be done typically on the web, Selenium can do for you. People use it for things like automated testing, automated form submission, and data extraction.
Selenium has four parts: Locating Techniques, WebDriver API, Browsers, and Drivers. In this post we will discuss assertions in Selenium Python.
An assertion is a statement that checks if the condition is true or not.
If the condition is true then nothing happens but if the condition is false then it throws an exception.
We use assertions to verify if the expected result occurs or not. If the assert fails, then we know that our test case has failed hence we can take some corrective action.
In Selenium Python we have Assert class defined in asserts module within pyunit package..
Python is a versatile language that you can use to automate many tasks, including web testing with Selenium. In this post, we’ll look at how to use assertions in Selenium Python to verify the expected results of our tests. Assertions are a powerful tool that can be used to check if a certain condition is met.
If the condition is not met, an AssertionError will be raised. This is useful for verifying the results of our tests, as it will ensure that our test fails if the expected result is not achieved. To use assertions in Selenium Python, we first need to import the selenium module: from selenium import webdriver – Then, we can create an assertion like so.
Assertions in Python
An assertion is a statement in Python that can be used to test for conditions that you expect to be true. Assertions can be used to test for data type errors, value errors, and general logic errors.
In Python, assertions are written using the assert keyword.
For example:
assert True
assert 2 + 2 == 4
assert “foo” != “bar”
If an assertion fails, it will raise an AssertionError .
Otherwise, the assertion passes silently.
Assertions are most commonly used in unit tests as a way to verify the correctness of code. However, they can also be useful in debugging programs or catching user input errors.
Assert And Verify in Selenium Example
When developing a Selenium test suite, you will often come across the need to check that certain conditions are met in order to ensure the success of your tests. This is where assert and verify come in. Both assert and verify can be used to check for conditions, but they differ in how they handle failures.
Assert checks for a condition and if the condition is not met, it will abort the current test case. Verify also checks for a condition, but if the condition is not met, it will continue with the execution of the test case. So, if you want your tests to fail fast and stop on first failure, then use assert.
If you want your tests to continue even if there are some failures, then use verify. In this example, we will use assert to check that a web page contains the expected text “Welcome”.
- 1) First import org . openqa . selenium . By ;
- 2) Then create a new class WelcomeTest and extends with TestBase
- 3) In our @Test public void test () throws Exception
- 4) we have added an assertion by using WebDriver’s findElement () method :
- 5) WebElement element = driver . findElement ( By . xpath ( “//h1[contains(text(),’Welcome’)]” ) ;
- 6) Assert . assertTrue ( element . isDisplayed () ) ; 7)} }
How to Import Assert in Selenium Python
If you’re using Selenium in Python, you might have come across the need to use an assert statement. Assertions are a way of verifying that something is true, and they can be very useful when testing software.
Unfortunately, there’s no built-in way to import assert in Selenium Python.
However, there is a workaround that we’ll show you in this blog post.
The first thing you need to do is create a file called “user-extensions.js” in your Selenium IDE installation directory. You can find this directory by going to the Help menu and selecting “About”.
Once you’ve found the directory, create a new file called “user-extensions.js” and paste the following code into it:
user-extensions.js function assert(condition) { if (!condition) { throw ‘Assertion failed’; } } selenium.browserbot._commandsToInject = [assert];
Save the file and restart Selenium IDE.
Now when you record a test, any calls to assert will be automatically added to your script.
How to Use Assert in If Condition in Selenium Python
Python is a programming language with many features and libraries. One feature that can be particularly useful is the “assert” statement. The assert statement is used to check if a condition is true, and if not, it will raise an exception.
This can be useful in Selenium testing, as you may want to check if an element is present on a page before continuing with the test. To do this, you can use an “if” condition with the “assert” statement. For example:
if selenium.is_element_present(“id=some-element”):
print(“Element is present!”)
else:
print(“Element is not present!”)
Assertions are also very helpful in debugging your code. By using assertions, you can test your code for specific conditions and values that you expect to be true or false.
If an assertion fails, it will raise an exception and stop the program from running further. This can help you find errors in your code more quickly.
Overall, assertions are a valuable tool that every Python programmer should know how to use!
Assert Title in Selenium Python
Python is a versatile language that you can use on the backend, frontend, or full stack of a web application. In this post, we will focus on using Python for testing web applications with Selenium.
Selenium is a web automation tool that allows you to test your web applications in various browsers.
Selenium can be used in Python by importing the selenium module.
In order to assert the title of a page in Selenium Python, you can use the following code:
assert “title” in driver.title
This code will check if the word “title” is present in the title of the page that is currently open in the browser. If it is present, then the assertion will pass. Otherwise, it will fail.
Soft Assert in Selenium
One of the most important aspects of testing is verifying that your tests pass or fail for the right reasons. This is where soft assertions come in.
A soft assertion is an assertion that does not immediately throw an AssertionError if it fails.
Instead, the failure is recorded and all subsequent soft assertions in the test are executed before finally throwing an AssertionError. This allows you to continue running your test even if one or more assertions fail.
Soft assertions can be very useful when testing web applications with Selenium, as they allow you to verify multiple elements on a page without having the test fail as soon as the first element cannot be found.
For example, imagine you are testing a login page and want to check that both the username and password fields are present before entering any data. If either field is not present, then the test should fail. With a normal assertion, this would mean that only one field needs to be present for the whole test to pass:
assertTrue(driver.findElement(By.id(“username”)).isDisplayed());
assertTrue(driver.findElement(By.id(“password”)).
isDisplayed());
// enter credentials and log in…
With a soft assertion, both fields will still need to be present for the test to pass but each will be checked independently:
SoftAssertions softly = new SoftAssertions();
Python Selenium Assert Text Present
Python Selenium Assert Text Present: In this tutorial, we will learn how to use the Python selenium module to assert that a given text is present on a web page. We will take a simple example and see how we can use this module to achieve our goal.
Python Selenium Assert Element Present
Python Selenium Assert Element Present is a great way to check if an element is present on a page. This can be very useful when testing web applications. To use this method, you first need to import the selenium module.
Then, you can call the assert_element_present method.
This method will take two arguments. The first argument is the locator of the element that you want to check.
The second argument is the message that will be displayed if the element is not present. For example, you could use the following code to check if an element with the id “my-element” is present:
from selenium import webdriver driver = webdriver .
Chrome () driver . get ( “https://www.example.com” ) try : assert_element_present ( “my-element” , “Element is not present” ) except AssertionError as e : print ( e ) driver .
Credit: www.youtube.com
What is Assertion in Python Selenium?
Python Selenium Assertions are used to verify the conditions of the element under test. The most common assertion is the “assert” keyword, which verifies that the given condition is True. If the condition is False, an exception will be raised.
Other assertions include “verify”, which will not raise an exception if the condition is False, and “waitFor”, which will wait for a certain amount of time before checking the condition.
What are the Assertions in Selenium?
There are four different types of assertions in Selenium:
- Assertions that an element is present on the page.
- Assertions that an element is not present on the page.
- Assertions about the text contained within an element.
- Assertions about the value of an element’s attribute.
How Many Types of Assertion are There in Selenium?
In Selenium, there are four types of assertions:
- Soft Assertion
- Hard Assertion
- TestNG Assertion
- JUnit Assertion Soft Assertion: A soft assert does not throw an exception when an assert fails.
The test execution continues even after the failure of a soft assert. Thus, it is used when we want to verify all the assertions in our test case before throwing an exception. For example, if we have 10 assertions in our test case and 9 pass while one fails, then the test case will be marked as failed but all the other passing assertion results will also be logged.
This is useful when we want to know why a test case is failing and if multipleassertions are failing then which one is causing the failure. To use soft assertion, we need to use “org.testng.asserts” package and its “assertAll()” method like this: @Test
public void softAssertTest(){ SoftAssert sa = new SoftAssert(); System .
out .println ( “line 1”); sa . assertTrue(false); //will not fail here as only object creation happens now for this object System .out .println ( “line 2”); //line 2 would execute } @AfterMethod //this will execute whether method passes or fail public void tearDown(ITestResult result){ //printing only on console sa .assertAll();//now it will check for all remaining assertions and throws exception if any of them fails }} Hard Assert: A hard assert throws an exception as soon as an assert statement fails without executing the subsequent statements in your program i mport org .testng .annotations.*; import org .testng .
What is Assert Statement in Python?
Python’s assert statement is a debugging tool that tests a condition. If the condition is true, nothing happens. If the condition is false, an AssertionError exception is raised.
Assertions are mainly used to check for valid input or state changes, rather than catching errors. For example, you might want to check that a value is positive before calculating its square root.
assert can be used in two ways: as an expression or as a statement.
When used as an expression, assert evaluates the given expression and returns True if no exception is raised.
assert 3 > 2 # returns True
assert 2 > 3 # raises AssertionError
As a statement, assert can take one or more conditions separated by commas. All conditions must evaluate to True for nothing to happen:
assert 3 > 2, “3 is not greater than 2” # returns None
How to do assertion in python with Selenium?
Conclusion
In Selenium Python, assertions are used to verify the expected behavior of a web element on a page. Assertions can be used to check for the presence or absence of an element, the value of an element, and the state of an element.