[FIXED] What is use of "expect_file()" function in Codeception?

Issue

Hi i am new to codeception unit testing and i am using it with Yii2. I know the user of functions expect_not() and expect_that() and also know little about expect() function and uses it to check key in error array.

However I don't know the use of expect_file(). I searched little in internet but found not any good help. can anyone please give me little description about the use of this function.

Solution

expect_file() is used to verify with assertions specific to file system objects. It has two parameters (one is optional).

If you call this function with a single parameter, it will be used as the Subject Under Test file name. if it is called with two parameters, will be used as a description to display if the assertion fails but if you if you call it with 0 or more than two arguments it will throw a bad method call exceptions.

You can use it like this

expect_file('filename.txt')->exists();
expect_file('filename.txt')->notExists();

BTW expect_file() is an alternate function for verify_file().

Answered By - Asfandyar Khan