Execution of Nose2 Python Tests
As Nose2 is different from the Nose test, the command for triggering tests in Nose2 is also different. Below is the command for executing tests in Nose2
nose2 --verbose <filename_without_.py>
For example, if the filename that contains Nose2 tests is Test_Nose2_example.py, the command used for executing the tests inside should be:
nose2 --verbose Test_Nose2_example
Test Discovery in Nose2
In Nose2, the nomenclature is used for modules (or files) and test cases beginning with test_ applies. The test classes that surround the test methods should start with the word Test.
A plugin for Nose2 facilitates automatic test module discovery. The plugin looks for test-related modules (or test files) in packages and folders. The loadTestsFromModule() hook is then fired for all discoveries, allowing the other plugins to load the actual tests. More information regarding the discovery-based test loader may be found in Nose2.
Also See, Intersection in Python
Example for Usage of Nose2 Framework
import unittest
from selenium import webdriver
import time
from time import sleep
from selenium.webdriver.common.by import By
class ChromeSearch(unittest.TestCase):
def testSearchLambdatestChrome(self):
self.driver = webdriver.Chrome()
self.driver.get('https://www.google.com')
self.driver.maximize_window()
title = "Google"
assert title == self.driver.title
searchText = "LambdaTest"
searchBox = driver.find_element(By.XPATH, "//input[@name='q']")
searchBox.send_keys(searchText)
# Using Sleep is absolutely not a good programming practice
# It is used here only for the demonstration purpose
time.sleep(5)
searchBox.submit()
time.sleep(5)
# Click on the LambdaTest HomePage Link
title = "Most Powerful Cross Browser Testing Tool Online | LambdaTest"
lt_link = driver.find_element(By.XPATH, "//h3[.='LambdaTest: Most Powerful Cross Browser Testing Tool Online']")
lt_link.click()
time.sleep(10)
assert title == driver.title
time.sleep(2)
# Release the resources in a teardown function
print("TearDown has been initiated")
driver.quit()
if __name__ == '__main__':
import nose2
nose2.main()
Also read, Python filename extensions
Fixtures in Nose2
Fixtures are supported at the class, module, and test (or method) levels in Nose2, as they are in other popular frameworks such as PyTest.
import unittest
from selenium import webdriver
import time
from time import sleep
from selenium.webdriver.common.by import By
from nose2.tools import params
class ChromeSearch(unittest.TestCase):
def setUp(self):
print("setUp is initiated")
self.driver = webdriver.Chrome()
self.driver.maximize_window()
def testSearchLambdatestChrome(self):
self.driver.get('https://www.google.com')
title = "Google"
assert title == self.driver.title
searchText = "LambdaTest"
# search_box = driver.find_element_by_xpath("//input[@name='q']")
searchBox = self.driver.find_element(By.XPATH, "//input[@name='q']")
searchBox.send_keys(search_text)
# Using Sleep is absolutely not a good programming practice
# It is used here for the demonstration purpose
time.sleep(5)
searchBox.submit()
time.sleep(5)
# Click on for the LambdaTest HomePage Link
title = "Most Powerful Cross Browser Testing Tool Online | LambdaTest"
lt_link = self.driver.find_element(By.XPATH, "//h3[.='LambdaTest: Most Powerful Cross Browser Testing Tool Online']")
lt_link.click()
time.sleep(10)
assert title == self.driver.title
time.sleep(2)
def testToDoApp(self):
self.driver.get('https://lambdatest.github.io/sample-todo-app/')
self.driver.maximize_window()
self.driver.find_element(By.NAME, "li1").click()
self.driver.find_element(By.NAME, "li2").click()
title = "Sample page - lambdatest.com"
assert title == self.driver.title
sampleText = "Happy Testing at LambdaTest"
emailTextField = self.driver.find_element(By.ID, "sampletodotext")
emailTextField.send_keys(sampleText)
time.sleep(5)
self.driver.find_element(By.ID, "addbutton").click()
time.sleep(5)
assert self.driver.find_element(By.XPATH, "//span[.='Happy Testing at LambdaTest']").text == sample_text
def tearDown(self):
# Close the opened browser
print("TearDown initiated")
self.driver.quit()
if __name__ == '__main__':
import nose2
nose2.main()
Differences Between Nose2, Nose, and unittest2
- Nose2 is compatible with all Python versions currently maintained by the Python team, whereas Nose is only compatible with Python 2.4. (and above).
- Nose2, like unittest2, only supports module and class level fixtures but not package-level fixtures.
- Unlike Nose, which uses lazy loading, Nose2 does not require a custom importer because it uses __import__ to import test modules ().
-
There is more support for parameterized tests and generator tests than for Nose. Nose2 supports test generators in test classes, test methods, and unittest TestCase subclasses.
Also see, How to Check Python Version in CMD
Frequently Asked Questions
How can we do Logging and Reporting in Nose2?
Selenium's advanced bug reports aid in the communication between testers and developers. They also aid in the faster resolution of difficulties, hence increasing the overall quality of the web product. We'll look at how to make reports in Nose2 Python in this section of the Python Nose tutorial.
What do we mean by parallel testing in Nose2?
Parallel testing in Selenium allows you to run the same tests in many test environments at the same time. We'll look into parallel testing in Nose2 Python in this segment of the Python Nose Tutorial.The mp plugin was added to Nose2 version 0.3 to allow testing to be distributed across several processes. Though parallel test execution improves execution speed (due to the fact that tests are run in parallel), the benefit is more noticeable in IO-bound tests than in CPU-bound tests.
Which type of testing is done when one of your existing functions stop working?
Regression testing is a sort of testing that is used to ensure that a software change does not affect the product's existing functioning.
What is Django nose?
Django-nose brings all of nose's features to your Django tests, such as testing only your apps by default, rather than all of the standard ones in INSTALLED APPS. Tests are executed in one or more individual modules (or apps, or classes, or folders, or just running a specific test).
Which of the following decorator is used to skip a test if a given condition is false with unit test?
unittest.skipIf(condition, reason)
Conclusion
In this article, we have extensively discussed the Nose2 test runner in python. We saw its uses and key concepts.
After reading about the Nose2 test runner, are you not feeling excited to read/explore more articles on the topic of Python? Don't worry; Coding Ninjas has you covered. To learn, see Exception Handling in Python, Clean-up Action In Python, Short-Circuiting in Python, and Lambda Function in Python.
Refer to our Guided Path on Coding Ninjas Studio to upskill yourself in Data Structures and Algorithms, Competitive Programming, JavaScript, System Design, and many more! If you want to test your competency in coding, you may check out the mock test series and participate in the contests hosted on Coding Ninjas Studio! But if you have just started your learning process and are looking for questions asked by tech giants like Amazon, Microsoft, Uber, etc., you must look at the problems, interview experiences, and interview bundle for placement preparations.
Nevertheless, you may consider our paid courses to give your career an edge over others!
Do upvote our blogs if you find them helpful and engaging!
Happy Learning!
305+ registered