How to check assert empty string in python unittest?

Question

I have a question that I would like to test a given empty string msg = '' in python unittest but I could not found the right assertion function for it.

I have tried with:

self.assertIsNone(msg)

But I got an error

AssertionError: '' is not None

So I went on with

self.assertIsEmpty(msg)

But I got

object has no attribute 'assertIsEmpty'

Therefore, what is the correct way to check an empty string in unittest? Thanks

Ray Toal · Accepted Answer · 2019-07-09 04:04:01Z

6

You are looking for

assertEqual(x, '')

Documentation for Python 3

Documentation for Python 2.7

answered Jul 9, 2019 at 4:04

Ray Toal

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2 Comments

Houy Narun Over a year ago

thanks very much, I just thought it has a specific function for checking empty string.

Ray Toal Over a year ago

It's true that some kind of assertIsBlank or assertIsEmptyString does appear in many testing frameworks, but Python's unittest, being built in, is fairly lightweight in this area. Many of the assertions were actually added in Python 2.7. :)

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