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Testing the Chain of Responsibility, Part 1 (redux)
Download the podcast Testing the Chain of Responsibility The Chain of Responsibility pattern (hereafter CoR) is one of the original “Gang of Four” patterns. We’re assuming you know this pattern...
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Testing the Chain of Responsibility, Part 2
Download the podcast Chain Composition Behaviors We always design services for multiple clients. Even if a service (like the Processor service in our example) has only a single client today, we want...
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Testing Through API's
Download the Podcast We recently got a question from Tomas Vykruta, a colleague of ours, and we felt it turned out to be such a good, fruitful question that we wanted to pass it, and our answers, along...
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Hiatus
We just wanted to make clear to our readers that this blog, and the book we are working on through it, are not dead. Amir and I have just been in very high demand for training since the holidays, but...
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TDD Mark 3 Introduced
First of all, sorry for the long absence. Our training schedule has been wall-to-wall, and when one of us had a brief gap the other has always been busy. It has given us time to think, however. Long...
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TDD and Asychronous Behavior: Part 1
<!--[if gte mso 9]><![endif]--> In TDD we write tests as specifications where each of them is focused on a single behavior of the system. A “good” test in TDD makes a single, unique...
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TDD and Asychronous Behavior: Part 2
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Welcome Max Guernsey
Max has joined Net Objectives, as some of you may know, as a trainer, coach, and mentor. We've been friends with Max for a long while, and he has been a contributor to this blog and to the progress of...
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TDD and Defects
We've said all along that TDD is not really about "testing" but rather about creating an executable form of specification that drives development forward. This is true, and important, but it does not...
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TDD and Its (at least) 5 Benefits
Many developers have concerns about adopting test-driven development, specifically regarding: It's more work. I'm already over-burdened and now you're giving me a new job to do. I'm not a tester. We...
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Structure of Tests-As-Specifications
(Please note: this post is being revised... expect improvements to be made) A big part of our thesis is that TDD is not a testing activity, but rather a specifying activity that generates tests as a...
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Specifying The Negative in TDD
One of the issues that frequently comes up is "how do I write a test about a behavior that the system is specified not to have?" It's an interesting question given the nature of unit tests. Let's...
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TDD and the "6 Do's and 8 Skills" of Software Development: Pt. 1
This post is not about TDD per se, but rather a context in which TDD can demonstrate its place in and contribution to the value stream. This context has to do with the 6 things that we must accomplish...
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TDD and Design: Frameworks
Increasingly, in modern software development, we create software using components that are provided as part of a language, framework, or other element of an overall development ecosystem. In...
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Magic Buttons and Code Coverage
This will be a quickie. But sometimes good things come in small packages. This idea came to us from Amir's good friend Eran Pe'er, when he was visiting Net Objectives from his home in Israel. I'd like...
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TDD: Testing Behavior in Abstract Classes
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Test-Driven Development in the Larger Context: TDD & ATDD (Introduction)
Introduction A question that often arises in our consulting and training practices concerns the relationship between Test-Driven Development (TDD) and Acceptance-Test-Driven Development (ATDD). Which...
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Test-Driven Development in the Larger Context: Pt 1. Audience
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Test-Driven Development in the Larger Context: Pt 2. Cadence
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Test-Driven Development in the Larger Context: Pt 3. Automation
Both ATDD and UTDD are automatable. The difference has to do with the role of such automation, how critical and valuable it is, and when the organization should put resources into creating it....
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Test-Driven Development in the Larger Context: Pt 4. Synergy
Having established the differences between ATDD and UTDD, how are they the same? Why are they both called “TDD” collectively? Tests ensure a detailed and specific, shared understanding of behavior. If...
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TDD: Specifying the Negative
One of the issues that frequently comes up is "how do I write a test about a behavior that the system is specified not to have?" It's an interesting question given the nature of unit tests. Let's...
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The 6 Do's and 8 Skills of Development
This post is not about TDD per se, but rather a context in which TDD can demonstrate its place in and contribution to the value stream. This context has to do with the 5 things that we must accomplish...
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TDD Mark 3, part 2
I realized recently that this had been written, but never published. Part 1 was, but never this second part. Not sure how that happened. Maybe I needed a test. :) Anyway, here it is. Part three is...
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New Little Book
I've been posting more on LinkedIn these days. Short little nuggets about TDD that people really seem to respond to. It's all out there if you want to read it, just look for my name on LinkedIn....
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