Anders Wallgren on Unit Testing

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Del curso dictado por University of Virginia

Testing with Agile

256 calificaciones

University of Virginia

Testing with Agile

256 calificaciones

Curso 4 de 5 en SpecializationAgile Development

To deliver agile outcomes, you have to do more than implement an agile process; you have to create a culture of experimentation. It's this commitment to experimenting that's at the heart of a high-functioning practice of agile. This course shows you how to integrate the practice of experimentation across concept/feature testing, usability testing, and testing the software itself. Basically, you’ll learn how to answer these four big questions with experiments: 1. Should we build it? 2. Did it matter? 3. Is it usable? 4. Did it break? More specifically, after completing this course, you’ll be able to: - Identify where and how to invest your team’s scarce time and energy into better testing for maximum impact on outcomes - Coach your team on the relationship between idea, usability, and software testing to get the buy-in you need for strong interdisciplinary collaboration - Test ideas before you build them to avoid waste and help your team focus on what will really drive outcomes - Test alternative interface patterns before you build them to maximize both product usability and purposeful implementation As a Project Management Institute (PMI®) Registered Education Provider, the University of Virginia Darden School of Business has been approved by PMI to issue 20 professional development units (PDUs) for this course, which focuses on core competencies recognized by PMI. (Provider #2122) This course is supported by the Batten Institute at UVA’s Darden School of Business. The Batten Institute’s mission is to improve the world through entrepreneurship and innovation: www.batteninstitute.org.

De la lección

Does it break?

You’ve learned how to test ideas and usability to reduce the amount of software your team needs to build and to focus its execution.Now you’re going to learn how high-functioning teams approach testing of the software itself. The practice of continuous delivery and the closely related Devops movement are changing the way we build and release software. It wasn’t that long ago where 2-3 releases a year was considered standard. Large firms like Facebook now release new code multiple times per day. In this module, we’ll look at the delivery pipeline and step through what successful practitioners do at each stage and how you can diagnose and apply the practices that will improve your implementation of agile.

The Commit and Small Test Phase2:21

Anders Wallgren on Unit Testing3:01

The Job of Version Control3:35

The Medium Test Phase1:48

The Large Test Phase6:02

Creating Large/Behavioral Tests9:25

Anders Wallgren on Testing UI1:58

Anders Wallgren on Functional Testing9:58

The Release Stage4:22

Anders Wallgren on Deployment2:45

Chris Kent on Developing with Continuous Delivery10:13

Chris Kent on Continuous Deployment11:02

Jim Rose on Continuous Integration and Delivery7:02

Conoce a los instructores

Alex Cowan
Faculty & Batten Fellow
Darden School of Business

I'm with Anders Wallgrin.

Anders is the CEO of Electric Cloud, which builds solutions for continuous delivery.

Thanks for joining us Anders.

>> My pleasure.

>> Let's talk about unit testing a little bit.

I mean, you've worked with a lot of things.

What are some of the things you see working, not working teams approach?

Review our initiation of unit testing.

>> A lot of it depends on what are you starting with.

If you are starting with a large existing code base that doesn't have good

test coverage.

You're probably goingto go off and do a certain set of things that's

different than if you're starting with a blank sheet of paper.

And can sort of mandate that we're going to do unit testing from

the very beginning.

But I think the former is a situation that a lot of us find ourselves in,

and really it's important to kind of cover how you transform.

How do you transform that situation into something where you've got a quality

tested code base and can reap the benefits of that...

You know, faster refactoring and more reliable code and bills and

those kinds of things.

And really, what a lot of people will say is, don't dive in and

try to get 80% coverage on existing code.

Because you're going to spend the next six months doing nothing but

that and that really doesn't help anyone.

And so, what a lot of people will say is, there's a lot of techniques you can use.

Like If you touch a piece of code, write some tests for it or

do what some people call boundary testing.

If there's a kind of a natural API boundary or

a service layer boundary, then do some testing around that.

So, that you can certainly do contract validation if you will and

so, there's a lot of tricks that you can play.

And things like for example,

mandating that your people do test driven development, especially for bug fixing.

So that if you're fixing a bug, write the test that confirms the bug before you

actually fix the bug.

It's actually, it's pretty interesting how quickly you start to develop a feel for

how to write good tests.

And if you can use that as kind of the camel's nose under the tent to get people

to doing test-driven development.

And then of course, if you can get even more sophisticated than structuring things

like behavior driven development.

Where you can use these testing frameworks that allow non programmers,

still technical people.

But architects and program managers and project managers and

those kinds of people to write behavior driven tests.

That you can then use almost as a specification for

the user stories that you need to do to finish features.

So once you get there and

once you have good unit test coverage, you can then move a lot quickly.

You can rewrite subsystems and refractor at will.

Because you have these tests and

can rely on them to keep you honest and keep things working.

Those are some great perspectives on unit testing.

>> Thanks Andrew.

>> You're welcome.

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