Original subtitles

We can now add more tests to this file and our next focus is the date method that we use to format a

date.

So here we cannot a new group.

And here we can name it date and we're gonna give it a body like this and then we could add a new test

to check that the correct date is formatted so I cannot test with 20 19 0 8 twelve as a description

to mean that the logos 2019 and then the method body as usual.

And here I can right expect and then four month date.

And here I need to pass up the date time with Twenty 19 eight twelve and the expected value in these

cases twelve logos 29 things like this.

And at this stage I could run this test and I can see that I get an error because the actual value that

was return is different from my expected value.

And in fact this expected value is only valid if I configured the default locale to G.B. and instead

the test has run with the U.S. default lockout.

So when we write tests they use date formatting.

We need to be very careful because different systems might have different default locales.

So we need a way of choosing what locale to use when we run tests that rely on data for mapping and

to do that.

I'm going to use a new method which is called set up and set up takes a closure that is executed before

each test.

In this group is run.

And this makes it a very useful method for code that needs to be executed for each test.

OK.

So what I want to do next is to configure the default to look out for my test and I can do this by typing

I and the L which I need to import from the I A.L. package and then I'm going to set the default locale

to E and on the score G.B. and I also need to call initialize date for my thing and this is also a method

that I need to import from here and here I can typing I and the l the default locale like this and this

is a method that returns a future.

So I need to type in I wait here and also sink in here.

And now that I made this change I should remain this group to date with G.B. loco because all the tests

that will run here will use that GBM locale.

And now I can run the tests again and this time I got the success by the way I have said that we can

use this setup method to execute some common code before each test is run.

And this means that here we go that another test for example with a different date of the 16 of August

and I can update this here.

And in this case we could run this test again and this would also succeed because the correct lock out

will be set up in the setup method.

So if we wanted to ensure that our code works well with different locales we could copy paste this entire

group and adjust all the values accordingly.

OK.

So let's continue on the next video.