I am new to ionic and decided that i wanted to integrate testing while building my app. But I am a little confused.
Should i write a test after already written functions? or functions that I will write?
Should I test every function ?
I would appreciate if someone just explains the logic flow for me.
Well, you could look into TDD (Test Driven Development) and that should answer your questions.
However, to provide a short answer here as well; you should write a test first, code later (for the why consult the link above). In practice, testing every function may not be viable, but TDD certainly enforces it.
One thing to note, you wrote E2E, but actually what you'll be doing at the start is Unit Testing your functions (E2E comes later).
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I would like to start automating the testing of my app written in CodenameOne, but I find it difficult to visualize how to use the TestRecorder (section "Unit Testing") for "industrial" testing.
If anyone here is already using it, could you share a few tips about how you use it?
E.g. how do you use the different "Asserts" buttons, how do you structure your tests into suites and how do you chain them together (e.g. so each test case will start in the right context like where in the navigation structure it is supposed to run), do you need to manually edit the tests, ... And is there anything to be aware of before creating lots of tests interactively, e.g. to avoid that your tests are invalidated by some irrelevant change to your UI?
I read in the blog post from May 2017 that the TestRecorder "wasn’t picked up by many developers and as such it stagnated". I tried TestRecorder and immediately came across a seemingly basis error in it (missing test for null) when recording a test case using the Toolbar, which gave the impression it is still the case. So, if anyone here is using another approach that is working well for you, I'd love to hear about that.
See the test classes we use to test Codename One itself here: https://github.com/codenameone/CodenameOne/tree/master/tests/core
You can use the test recorder to generate a skeleton but you can do this manually just like any test. The test API lets you invoke the app or just pieces of it and perform assertions on the behaviors within.
I have been reading tons of articles on unit testing. I am specifically using angular.js right now and came to the conclusion that unit testing = great. I also understand what unit tests are conceptually, but I honestly have no idea what I am doing or looking for. I already started the angular application and before I continue, I feel like I should start testing units of it. I have started tutorials and everything tells me "how" to do it using jasmine (or the other ones). I have a node project set up that is running Karma and a folder that has some *.js files in it to do all the describing/testing. However, it feels like the "tests" I write in a js sit in that file and do nothing.
What am I looking for? How do I actually view the results of the tests? It is all there, but I have no idea where exactly I am supposed to start. Am I supposed to be able to view the test in the browser? Is it supposed to run and save to a log file? Is it actually supposed to be tied to my ACTUAL code, or is it just rewritten logic that is supposed to mimic my code for testing?
This may be a dumb question, but I have spent a long time trying to figure out what exactly to look for. I noticed in some tutorials people have had little windows that tell them if their tests are failing or not (webstorm I believe) while they are writing the tests.
Any guidance would be greatly appreciated!
I'm using CakePHP 2.3 and would like to know how to properly go about building a CakePHP website using test-driven development (TDD). I've read the official documentation on testing, read Mark Story's Testing CakePHP Controllers the hard way, and watched Mark Story's Win at life with Unit testing (PDF of slides) but am still confused. I should note that I've never been very good about writing tests in any language and don't have a lot of experience with it, and that is likely contributing to my confusion.
I'd like to see a step by step walkthrough with code examples on how to build a CakePHP website using TDD. There are articles on TDD, there are articles on testing with CakePHP, but I have yet to find an in-depth article that is about both. I want something that holds my hand through the whole process. I realize this is somewhat of a tall order because, unless my Google-fu is failing me, I'm pretty sure such an article hasn't yet been published, so I'm basically asking you to write an article (or a long Stack Overflow answer), which takes time. Because this is a tall order, I plan to start a bounty on this question worth a lot of points once I'm able to in order to better reward somebody for their efforts, should anybody be willing to do this. I thank you for your time.
TDD is a bit of falacy in that it's essentially just writing tests before you code to ensure that you are writing tests.
All you need to do is create your tests for a thing before you go create it. This requires thought and analysis of your use cases in order to write tests.
So if you want someone to view data, you'll want to write a test for a controller. It'll probably be something like testViewSingleItem(), you'll probably want to assertContains() some data that you want.
Once this is written, it should fail, then you go write your controller method in order to make the test pass.
That's it. Just rinse and repeat for each use case. This is Unit Testing.
Other tests such as Functional tests and Integration tests are just testing different aspects of your application. It's up to you to think and decide which of these tests are usefull to your project.
Most of the time Unit Testing is the way to go as you can test individual parts of the application. Usually parts which will impact on the functionality the most, the "Critical path".
This is an incredibly useful TDD tutorial. http://net.tutsplus.com/sessions/test-driven-php/
Does anyone know of a tool that can help determine which unit tests should be run based on the diffs from a commit?
For example, assume a developer commits something that only changes one line of code. Now, assume that I have 1000 unit tests, with code coverage data for each unit test (or maybe just for each test suite). It is unlikely that the developer's one-line change will need to run all 1000 test cases. Instead, maybe only a few of those unit tests actually come into contact with this one-line change. Is there a tool out there that can help determine which test cases are relevant to a developer's code changes?
Thanks!
As far as I understand, the key purpose of unit testing is to cover the entire code base. When you make a small change to one file all test have to be executed to make sure your micro-change doesn't break the product. If you break this principle there is little reason in your unit testing.
ps. I would suggest to split the project onto independent modules/services, and create new "integration unit tests", which will validate interfaces between them. But inside one module/service all unit tests should be executed as "all or nothing".
You could probably use make or similar tools to do this by generating a results file for each test, and making the results file dependent on the source files that it uses (as well as the unit test code).
Our family of Test Coverage tools can tell you which tests exercise which parts of the code, which is the basis for your answer.
They can also tell you which tests need to be re-run, when you re-instrument the code base. In effect, it computes a diff on source files that it has already instrumented, rather than using commit diffs, but it achieves the effect you are looking for, IMHO.
You might try running them with 'prove' which has a 'fresh' option which is based on file modification times. Check the prove manpage for details.
Disclaimer: I'm new to C unit testing and haven't been using prove, but have read about this option in my research.
I am precisely looking for the info like ,
TAP is for regression and TDD is for Unit Testing ... or
are they mutually exclusive( no need to use both of them ) ?
bonus for suggesting 'good' Unit Test Frame work for TDD in C (expecting to address good aspect as well :) )
finally cMockery (googles code) for Testing C code (not derived from xUnit Patterns) can be used for TDD ? how ?
added for clarity:
TAP is test anything protocol , you can find documentation in CPAN (perl archive). libtap is TAP for C. http://www.onlamp.com/pub/a/onlamp/2006/01/19/libtap.html?page=1 gives good explanation of TAP in
For unit testing frameworks for C, you can refer to this question.
There is no conflict between regression and unit testing, as the unit tests are used as a safety net to detect undesired changes.
You certainly can use TAP for TDD, there is no contraindication. If you already use Perl Test::More, then sharing the same output format can be helpful.
Why do you ask wheter cMockery can be used for TDD ? DO you think it cannot ? why ?
TDD and unit test frameworks are just means, not ends.
I guess you're referring to this TAP: "Tests and Proofs". TAP is a conference where people talk about TDD and ways to mathematically prove that a program is correct. So the two are not really related (Way to write software vs. a forum where you can talk about this topic).
TDD is used for both unit tests as for regression testing. For details, see this answer.
I haven't used any TDD frameworks for C but googling for "unit testing c" yields a couple of interesting links.
I using CUnitWin32 as my testing framework. The front-page highlights the positives