flaskr-tdd | Flaskr : Intro to Flask Test-Driven Development | Unit Testing library
kandi X-RAY | flaskr-tdd Summary
kandi X-RAY | flaskr-tdd Summary
As many of you know, Flaskr — a mini-blog-like-app — is the app that you build for the official Flask [tutorial] I’ve gone through the tutorial more times than I care to admit. Anyway, I wanted to take the tutorial a step further by adding Test-Driven Development (TDD), a bit of JavaScript, and deployment. This post is that tutorial. Enjoy.
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Top functions reviewed by kandi - BETA
- Login to the app .
- Delete a post .
- Adds an entry to the session .
- Invokes a function and returns the result .
- Search for posts .
- Handle the logout .
- Returns the index of posts .
- Initialize with title and text .
- Wraps the title .
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QUESTION
I am currently building a small web application to improve my skills, as part of this, I am trying to go with best practices across the board, testing, CI, well architected, clean code, all of that. Over the last few sessions of working on it, I have been struggling with a test on my root route where instead of returning a string via the route function, I am rendering a template, I have gotten it to work, but I don't understanding why it works, and this bothers me.
Primarily, it's the use of the b, before my assertion string, I assume it is to do with the fact that what I am rendering is not a string, but a html representation, akin to the difference between return and print, but I am hazy and would appreciate for someone to school me.
The line I am asking about is line 4 of the test_homepage_response function. And how it operates. Especially in regards to this error I was getting:
The error being returned: ...ANSWER
Answered 2017-Jul-22 at 04:02The very short simple answer, is that string belongs to the str
type, while "b" in front of a string will now make it a bytes object, belonging to type
bytes. Therefore, the expectation is that yes they should in fact not equal to each other because of the comparison of different types will be expected to fail.
Furthermore, the assertion you are using assertIn
, is using the in
keyword to test. In order to properly test with in
, you need to compare bytes to bytes in this case.
Observe this simple example, that takes you through replicating what you are experiencing:
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Install flaskr-tdd
[pip](https://pip.pypa.io/en/stable/) - a [package management](http://en.wikipedia.org/wiki/Package_management_system) system for Python, similar to gem or npm for Ruby and Node, respectively.
[venv](https://docs.python.org/3/library/venv.html) - used to create isolated environments for development. This is standard practice. Always, always, ALWAYS utilize virtual environments. If you don’t, you will eventually run into problems with dependency conflicts.
Create a new directory to store the project:.
Essentially, we want to open a database connection, create the database based on a defined schema if it doesn’t already exist, and then close the connection each time a test is ran.
Start by installing Flask-SQLAlchemy:. Make sure to add it to your requirements file as well.
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