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memorizing data between tests

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Ben Coman

memorizing data between tests

Say I want to write ten tests for different aspects of a web service point.

Apart from the risk of relying on an external service,

I'd like to poll the web service once rather than ten times.

I wondering about the feasibility of memorizing data between test methods.

Taking for example...

TestCase subclass: #MyTest ...

My understanding is that MyTest >> setUp is run once per test method.

What I guess is missing is a #groupSetup that would be called at the start of a running a group of tests.

MyTest >> groupSetup

memorized := Dictionary new.

MyTest >> getLiveDataOncePerRun

^ memorized at: 'data' ifAbsentPut: [ZnClient new get: 'http://someservice.com/liveData1'.

MyTest >> test1

|data|

data := self getLiveDataOncePerRun .

self assert: data result1 equals: 'expected result 1'

MyTest >> test2

|data|

data := self getLiveDataOncePerRun.

self assert: data result2 equals: 'expected result 2'

cheers -ben

Peter Uhnak

Re: memorizing data between tests

Hi Ben,

take a look at TestResource (its comment and subclasses). It should do what you are looking for.

Peter

On Sun, Sep 9, 2018 at 8:08 AM Ben Coman <[hidden email]> wrote:

Say I want to write ten tests for different aspects of a web service point.
Apart from the risk of relying on an external service,
I'd like to poll the web service once rather than ten times.
I wondering about the feasibility of memorizing data between test methods.
Taking for example...
TestCase subclass: #MyTest ...

My understanding is that MyTest >> setUp is run once per test method.
What I guess is missing is a #groupSetup that would be called at the start of a running a group of tests.

MyTest >> groupSetup
memorized := Dictionary new.

MyTest >> getLiveDataOncePerRun
^ memorized at: 'data' ifAbsentPut: [ZnClient new get: 'http://someservice.com/liveData1'.

MyTest >> test1
|data|
data := self getLiveDataOncePerRun .
self assert: data result1 equals: 'expected result 1'

MyTest >> test2
|data|
data := self getLiveDataOncePerRun.
self assert: data result2 equals: 'expected result 2'

cheers -ben

Ben Coman

Re: memorizing data between tests

That seems to be exactly what I'm looking for. Thanks Peter.

cheers -ben

On Sun, 9 Sep 2018 at 16:11, Peter Uhnak <[hidden email]> wrote:

Hi Ben,

take a look at TestResource (its comment and subclasses). It should do what you are looking for.

Peter

On Sun, Sep 9, 2018 at 8:08 AM Ben Coman <[hidden email]> wrote:
Say I want to write ten tests for different aspects of a web service point.
Apart from the risk of relying on an external service,
I'd like to poll the web service once rather than ten times.
I wondering about the feasibility of memorizing data between test methods.
Taking for example...
TestCase subclass: #MyTest ...

My understanding is that MyTest >> setUp is run once per test method.
What I guess is missing is a #groupSetup that would be called at the start of a running a group of tests.

MyTest >> groupSetup
memorized := Dictionary new.

MyTest >> getLiveDataOncePerRun
^ memorized at: 'data' ifAbsentPut: [ZnClient new get: 'http://someservice.com/liveData1'.

MyTest >> test1
|data|
data := self getLiveDataOncePerRun .
self assert: data result1 equals: 'expected result 1'

MyTest >> test2
|data|
data := self getLiveDataOncePerRun.
self assert: data result2 equals: 'expected result 2'

cheers -ben

Esteban A. Maringolo

Re: memorizing data between tests

In reply to this post by Peter Uhnak

You can use a TestResource for it, and use some sort of memoization.

I don't know if there is a library for memoization in Pharo, but if
the HTTP calls are not that many you can implement it by having a
cache in the test resource, implemented as a dictionary, with the URL
as key and its cached response as value.

Regards,

Esteban A. Maringolo

El dom., 9 sept. 2018 a las 5:11, Peter Uhnak (<[hidden email]>) escribió:

>
> Hi Ben,
>
> take a look at TestResource (its comment and subclasses). It should do what you are looking for.
>
> Peter
>
> On Sun, Sep 9, 2018 at 8:08 AM Ben Coman <[hidden email]> wrote:
>>
>> Say I want to write ten tests for different aspects of a web service point.
>> Apart from the risk of relying on an external service,
>> I'd like to poll the web service once rather than ten times.
>> I wondering about the feasibility of memorizing data between test methods.
>> Taking for example...
>> TestCase subclass: #MyTest ...
>>
>> My understanding is that MyTest >> setUp is run once per test method.
>> What I guess is missing is a #groupSetup that would be called at the start of a running a group of tests.
>>
>> MyTest >> groupSetup
>> memorized := Dictionary new.
>>
>> MyTest >> getLiveDataOncePerRun
>> ^ memorized at: 'data' ifAbsentPut: [ZnClient new get: 'http://someservice.com/liveData1'.
>>
>> MyTest >> test1
>> |data|
>> data := self getLiveDataOncePerRun .
>> self assert: data result1 equals: 'expected result 1'
>>
>> MyTest >> test2
>> |data|
>> data := self getLiveDataOncePerRun.
>> self assert: data result2 equals: 'expected result 2'
>>
>> cheers -ben
>>