From: Matthew Kerwin <lists@...>
Date: 2013-03-14T09:23:35+09:00
Subject: Re: Access values for JSON.parse response

Nicole Villette wrote in post #1101490:
> Nicole Villette wrote in post #1101455:
> Joel,
>
> What I need to do is verify that specific values exist in the response.
> For example, I expect the duration to be 30.  So in ruby I can use the
> following:
>
> val=recursive_select( "duration", parsed)
> assert_equal(30,val,"Item NOT found")
>
> Your function returns the following which is great because I need to be
> able to see all of the values for duration.

Joel's doesn't.  Mine does.  ;)

> value30pathTODAdBreaksAdBreak0duration
> value15pathTODAdBreaksAdBreak0Ad0duration
> value15pathTODAdBreaksAdBreak0Ad1duration

That's the .to_s of what it returns.  It's actually:

  [
   {"value"=>30, "path"=>["TOD","AdBreaks","AdBreak",0,"duration"]},
   {"value"=>15,
"path"=>["TOD","AdBreaks","AdBreak",0,"Ad",0,"duration"]},
   {"value"=>15,
"path"=>["TOD","AdBreaks","AdBreak",0,"Ad",1,"duration"]},
  ]

> Any suggestions on how I would go about verifying that duration is '30'?
> or duration is '15' in an assertion?  Do I need to use the strip method
> to grab the values? I'm just trying to find the best way to handle this.
>
> Thanks again for your assistance.

I made a gist <https://gist.github.com/phluid61/5157640> but I think I
broke github.

In summary, the relevant points are:

    # test that there are any durations
    assert( !val.empty?, "Item NOT found" )

    # test that _ANY_ durations are good
    assert(
      val.any?{|v| v['value'] == 30 },
      "Item(s) found, but none are #{target}" )

    # test that _ALL_ durations are good
    val.each do |v|
      assert_equal(30, v['value'],
        "Item /#{v['path'].join '/'} = #{v['value']}" )
    end

If it's allowed to be 30 or 15 you might want some better logic, like:

    val.any?{|v| [15,30].include? v['value'] }

and maybe

    val.each do |v|
      assert( [15,30].include? v['value'], # ...

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