All language subtitles for 381 Testing Flutter Apps.en

In this video I'm going to give an overview about testing in flutter and I will place to start with

this.

Is this page on the flatter documentation.

And if we read this we can find out that flatter supports three types of tests and these are a unit.

We did an integration tests and while this section covers testing in detail I also encourage you to

try some of the recipes on this page as they cover the basics quite well.

OK.

So it's now time to look at the distinction between unit.

We did an integration tests and according to the documentation our unit test tests are single function

method of class.

And the goal of our unit test is to verify the correctness of our unit of logic.

And there are a variety of conditions.

And in general.

Unit tests are the simplest kind of test that we can encounter.

And they also run very fast.

So it is common for projects to have a lot of unit tests because they can test specific things at a

very granular level.

But we need a lot of them to get good test coverage.

Then we have widget tests and these are used to test a single widget.

And the goal of what we did test is to verify that we just UI eye looks and interacts as expected and

as we will see they require a little bit more setup than unit tests but they can give us more confidence

that our code works.

And finally we have the integration tests and the goal of an integration test is to check that the entire

up or a large part of the app works as expected and as we can read here.

The goal of an integration test is to verify that all the widgets and services being tested worked together

as expected.

Furthermore you can use integration tests to verify your app's performance.

So if we wanted we could view these three types of tests as layer of what is known as the test pyramid

and a good testing strategy.

Would they include all three of these layers.

Because this gives us the most confidence that our code works as intended and in any case the entire

picture about testing would not be complete without mentioning Continuous Integration Services.

So I will not be covering spy services in this course but in my experience I have used both code magic

and be tried in some of my client work and I found that they are both mature services that I would recommend

for flatter projects.

OK.

So let's continue on the next video.