How to Write Clean, Testable Code

Google Tech Talks
December 15, 2010

Presented by Miško Hevery.

ABSTRACT

The Clean Code Talks are designed to help teams get better at writing clean, well-designed, testable code. Such code is easier to write tests for, more robust, easier to understand and maintain. Having clean code lets you be more productive. It helps you release more often, with more robustness, more confidence, and fewer rollbacks.

Miško Hevery works as an Engineer at Google where he is responsible for coaching Googlers to maintain the high level of automated testing culture. This allows Google to do frequent releases of its web applications with consistent high quality. Previously he worked at Adobe, Sun Microsystems, Intel, and Xerox (to name a few), where he became an expert in building web applications in web related technologies such as Java, JavaScript, Flex and ActionScript. He is well published and very involved in Open Source community and an author of several open source projects, most recently angular.

[nelsoncorreia]

Good talk on writing testable code. Shame the Q&A section is inaudible. :-(

[manricorazzi]

Great talk. Misko is the man. Got here via a Kent Beck's tweet, btw.

[MartinOfSomeName]

Look like my wishes has been granted and GTT is in HD now :). Thank you,

[amiramhalperin]

Very good talk. Well explained and demonstrated.
10x

[ssj]

Holy Crap this is straight 🔥 My code dead ass is unstoppable 💪🧑🏽‍💻🧑🏽‍💻🧑🏽‍💻🧑🏽‍💻🧑🏽‍💻 THANK YOU FOR THIS 😍😍

[sharperguy]

Am I right in thinking that the reason 'new' operators are bad is because you can't change the type of the object from outside?

[danielrusev]

It would've been better if we'd been able to hear the questions the audience asked. He could've repeated the question before answering it for our benefit.

[MrNicholasRutherford]

Thank you, this made a lot of vague ideas concrete for me. Good example code, great discussion.

[corbin]

@sharperguy (Disclaimer: I'm no OO guru and could be completely wrong ;p.) New is bad inside of constructors because that hard codes dependencies and is usually a sign that the constructor is doing too much. For example, if you have a User class with something like "new DatabaseConnection();" that's obviously bad as instantiating a database connection is not the business of a User object.

[kosterix]

subtitles are a bit off.
BDB actually is BDD, business driven development.

[RogerKeulen]

Thanx, just removed the NEW from my convert function.

Public Shared Widening Operator CType(m As Meter) As Millimeter
Return Convert(New Millimeter(UnitValue), m)
End Operator

[Mathview]

Go into Google and explain how to properly write code? Cool! For my next act, head in the Lion's mouth. lol ... anyways. .... Great talk even for the non-professional programmer. Now my question.... General engineering project management identifies the concept of "a metric" if you view the code as a project how do you relate the concepts of metric and specs? or are they unrelated?

[hoang-himself]

It's crazy how much have changed after 12 years

[alexkhimach]

great talk, but to silent voice and title isnt sinc.

[cgpilk]

WTF is frosting? Oh, right, *icing*.

[doug]

If you are going to tell us it is okay to say "I don't know" three times in the presentation, maybe you should take your own advice and admit that *you* don't know when people ask questions that you can't answer.

[BangsarRia]

On the contrary, it is shameful to say that you DO know Javascript

[someman]

I have no idea what's been said here either.

[click]

After one hour, they give the mic to the audience so the questions can be understood.... They need to improver their presentation better practices if they plan to upload them to youtube!!