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thoughtbot--factory_bot/spec/acceptance/build_list_spec.rb
Emmanuel Gautier 0b53d28b4c
Pass index to block for *_list methods
When using one of the `*_list` methods, allow the block to receive array
index for each object:

```ruby
posts = build_list(:post, 10, title: 'Post number') do |post, i|
  post.title = "#{post.title} #{i + 1}"
end

posts.first.title # => "Post number 1"
posts.last.title  # => "Post number 10"
```

A block that only takes in the object still works as before, as does
leaving off the block entirely.

Co-authored-by: Mike Countis <mike.countis@gmail.com>
2020-04-24 11:36:17 -04:00

68 lines
1.7 KiB
Ruby

describe "build multiple instances" do
before do
define_model("Post", title: :string, position: :integer)
FactoryBot.define do
factory(:post) do |post|
post.title { "Through the Looking Glass" }
post.position { rand(10**4) }
end
end
end
context "without default attributes" do
subject { FactoryBot.build_list(:post, 20) }
its(:length) { should eq 20 }
it "builds (but doesn't save) all the posts" do
subject.each do |record|
expect(record).to be_new_record
end
end
it "uses the default factory values" do
subject.each do |record|
expect(record.title).to eq "Through the Looking Glass"
end
end
end
context "with default attributes" do
subject { FactoryBot.build_list(:post, 20, title: "The Hunting of the Snark") }
it "overrides the default values" do
subject.each do |record|
expect(record.title).to eq "The Hunting of the Snark"
end
end
end
context "with a block" do
subject do
FactoryBot.build_list(:post, 20, title: "The Listing of the Block") do |post|
post.position = post.id
end
end
it "correctly uses the set value" do
subject.each do |record|
expect(record.position).to eq record.id
end
end
end
context "with a block that receives both the object and an index" do
subject do
FactoryBot.build_list(:post, 20, title: "The Indexed Block") do |post, index|
post.position = index
end
end
it "correctly uses the set value" do
subject.each_with_index do |record, index|
expect(record.position).to eq index
end
end
end
end