CODEWITHSUNDEEP
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d_rail
d_rail

Reputation: 4119

let variable names with sequence

Is there a way to add a sequence to the let variable name? Sort of like this:

5.times do |n|
    let (:"item_'#{n}'") { FactoryGirl.create(:item, name: "Item-'#{n}'") }
end

Then a test like this could work:

5.times do |n|
    it { should have_link("Item-'#{n}'", href: item_path("item_'#{n}'") }
end

It'll lead to a test for proper sorting, but just trying to understand the basics.

Edit: There was a typo, I removed the single quotes and the let call seems to be working

let! (:"item_#{n}") { FactoryGirl.create(:item, name: "Item-#{n}") }

The test passes for a single case if I use:

it { should have_link("Item-0", href: item_path(item_0)

But not for the sequence if I use:

it { should have_link("Item-#{n}", href: item_path("item_#{n}")

I have verified the problem is in the href path. How do you interpolate item_n when the used in a path?

Upvotes: 1

Views: 1532

Answers (2)

d_rail
d_rail

Reputation: 4119

Using an answer to another question, I found out how to get the result of a ruby variable from a string, using send. Also, I do like Erez's answer because I would like to use let variables because of the lazy evaluation. Here is what I got working:

describe "test" do
  5.times do |n|
    # needs to be instantiated before visiting page
    let! (:"item_#{n}") { FactoryGirl.create(:item, name: "item-#{n}") }
  end

  describe "subject" do
    before { visit items_path }

    5.times do |n|
      it { should have_link("item-#{n}", href: item_path(send("item_#{n}"))) }
    end
  end
end

Upvotes: 1

Erez Rabih
Erez Rabih

Reputation: 15788

That happens because in it { should have_link("Item-#{n}", href: item_path("item_#{n}") the href value is not a string but a ruby variable.

What I would do in your case is:

before do
  @items = []
  5.times do |n|
    @items << FactoryGirl.create(:item, name: "Item-#{n}")
  end
end

And in the spec itself:

@items.each do |item|
  it { should have_link(item.name, href: item_path(item)) }
end

Upvotes: 0

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