Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Django Unit Test for testing a file download Ask Question. Asked 10 years ago. Active 4 years ago. Viewed 11k times. Right now I'm just checking the response of the link like so: self. Add a comment. Active Oldest Votes. I am a trainer of web programming courses. I like to write article or tutorial on various IT topics. The download option is a general requirement for any website like the online book, free application software, free games, etc.
The file can be downloaded after executing a particular URL or clicking the download link and getting permission from the user. The ways of downloading a text file without any download link and a PDF file using the download link in the Django app will be shown in this tutorial. Prerequisites: Before practicing the script of this tutorial, you have to complete the following tasks. Setup a Django App: Run the following command to create a Django app named downloadapp.
Import mimetypes module import mimetypes import os module import os Import HttpResponse module from django. For example our LoanedBooksByUserListView is very similar to our previous view but is only available to logged in users, and only displays BookInstance records that are borrowed by the current user, have the 'on loan' status, and are ordered "oldest first".
Here we first use SetUp to create some user login accounts and BookInstance objects along with their associated books and other records that we'll use later in the tests. Half of the books are borrowed by each test user, but we've initially set the status of all books to "maintenance".
Note: The setUp code below creates a book with a specified Language , but your code may not include the Language model as this was created as a challenge. If this is the case, comment out the parts of the code that create or import Language objects. The rest of the tests verify that our view only returns books that are on loan to our current borrower.
Copy the code below and paste it onto the end of the test class above. Testing views with forms is a little more complicated than in the cases above, because you need to test more code paths: initial display, display after data validation has failed, and display after validation has succeeded. The good news is that we use the client for testing in almost exactly the same way as we did for display-only views. We should check that the initial value of the form is seeded with a date three weeks in the future, and that if validation succeeds we're redirected to the "all-borrowed books" view.
As part of checking the validation-fail tests we'll also check that our form is sending the appropriate error messages. This creates two users and two book instances, but only gives one user the permission required to access the view. Add the following tests to the bottom of the test class. These check that only users with the correct permissions testuser2 can access the view.
We check all the cases: when the user is not logged in, when a user is logged in but does not have the correct permissions, when the user has permissions but is not the borrower should succeed , and what happens when they try to access a BookInstance that doesn't exist.
We also check that the correct template is used. Add the next test method, as shown below. This checks that the initial date for the form is three weeks in the future.
Note how we are able to access the value of the initial value of the form field response. ModelForm instead of class RenewBookForm forms. The next test add this to the class too checks that the view redirects to a list of all borrowed books if renewal succeeds.
What differs here is that for the first time we show how you can POST data using the client. If so, modify the last two lines of the test code to be like the code below. Copy the last two functions into the class, as seen below. These again test POST requests, but in this case with invalid renewal dates. We use assertFormError to verify that the error messages are as expected. Django provides test APIs to check that the correct template is being called by your views, and to allow you to verify that the correct information is being sent.
Django's test framework can help you write effective unit and integration tests — we've only scratched the surface of what the underlying unittest framework can do, let alone Django's additions for example, check out how you can use unittest. There are a lot more models and views we can test. As a simple task, try to create a test case for the AuthorCreate view. Remember that you need to check anything that you specify or that is part of the design.
This will include who has access, the initial date, the template used, and where the view redirects on success. Writing test code is neither fun nor glamorous, and is consequently often left to last or not at all when creating a website. It is however an essential part of making sure that your code is safe to release after making changes, and cost-effective to maintain. In this tutorial we've shown you how to write and run tests for your models, forms, and views.
Most importantly we've provided a brief summary of what you should test, which is often the hardest thing to work out when you're getting started. There is a lot more to know, but even with what you've learned already you should be able to create effective unit tests for your websites.
The next and final tutorial shows how you can deploy your wonderful and fully tested! Django website.
Previous Overview: Django Next As websites grow they become harder to test manually. Prerequisites: Complete all previous tutorial topics, including Django Tutorial Part 9: Working with forms. Objective: To understand how to write unit tests for Django-based websites.
The most important automated tests are: Unit tests Verify functional behavior of individual components, often to class and function level. Regression tests Tests that reproduce historic bugs. Integration tests Verify how groupings of components work when used together. Delete the skeleton file as we won't need it.
The easiest way to run all the tests is to use the command: python3 manage. So, The solution I found was to override this path with tempfile. Doing this, all the test image I create running my tests will be saved in the temporary directory and eventually will be deleted by my OS.
That way, I am sure that no garbage will be left behind after the test. The second thing to notice is tempfile. NamedTemporaryFile , this tempfile function creates a temporary file with a visible name in the file system a visible path where it is located.
0コメント