Help in writing unit test cases

rubyonrails-talk
1

Hi,

I've been working on ROR just for 4 months. I am naive in writing test cases. I heard that one has to start with unit tests. So, I am confused to where and how to start with. Any materials available or any guides which helps me with some examples also.

Thanks in advance sumanth

2

Hello,

If you are using scaffolding to create your models and controllers then you have the test files for each model and controller already created within "test" directory.

Thie rails wiki is always a good starting point:

http://wiki.rubyonrails.org/rails/pages/HowtoUnitTest

Hank

3

Hi blasterpal,

First I should thank you for the quick response.

I am not using scaffolding to create controllers and models. So i dont have test files for them. But I used scaffolding just to try it. I am aware of how those test files are like.

But if I have to write a unit test case for a existing controller, how should I start with. Should I proceed method by method. Can we be specific for a method to write a test case. Like, can we just analyze a function in the model, testing it for its inputs and outputs etc.

-sumanth.

4

Provided, there exists a method which gets the data from the table of one model. It takes some variables. While fetching the data, it interacts with other tables also. We have 2 to 3 different queries which are interlinked. Meaning by result from one query are used in the next.

How one should start writing a test for it?

What aspects should be tested?

I am confused, dunno where to start?

Any help is much appreciated.

Thanks

sumanth

5

sumanth wrote:

Provided, there exists a method which gets the data from the table of one model. It takes some variables. While fetching the data, it interacts with other tables also. We have 2 to 3 different queries which are interlinked. Meaning by result from one query are used in the next. How one should start writing a test for it?

What aspects should be tested?

I am confused, dunno where to start?

Any help is much appreciated.

Thanks

sumanth

Hi blasterpal,

First I should thank you for the quick response.

I am not using scaffolding to create controllers and models. So i dont have test files for them. But I used scaffolding just to try it. I am aware of how those test files are like.

But if I have to write a unit test case for a existing controller, how should I start with. Should I proceed method by method. Can we be specific for a method to write a test case. Like, can we just analyze a function in the model, testing it for its inputs and outputs etc.

-sumanth.

Hello,

If you are using scaffolding to create your models and controllers

then you have the test files for each model and controller already

created within “test” directory.

Thie rails wiki is always a good starting point:

  [http://wiki.rubyonrails.org/rails/pages/HowtoUnitTest](http://wiki.rubyonrails.org/rails/pages/HowtoUnitTest)

Hank

Hi,

I’ve been working on ROR just for 4 months. I am naive in writing test

cases. I heard that one has to start with unit tests. So, I am

confused to where and how to start with. Any materials available or

any guides which helps me with some examples also.

Thanks in advance

sumanth

`My understanding is that the unit tests are really for testing of the model and any methods in in. I understand that the controllers are tested using the functional tests and combinations with the integration tests. I have only gotten as far as the unit tests so far and I have only written unit tests for cases where I have added methods to the models.

My understanding could be wrong but it is what I understand.

Norm

`

6

Sumanth,

I wrote a series of blog posts that might help demystify unit testing for you.

It starts here: http://www.nullislove.com/2007/11/10/testing-in-rails-introduction/

HTH, Kevin