Rspec: test number of rows in CSV output

Question

In Rspec how do I test the number of rows that are in a CSV file?

I have created a CSV file in a mutation. I am able to test the output of the CSV by checking if certain text is included. However, I would like to be able to test the number of rows that are in the output.

Please find an example of what I have tested so far below which passes:

describe "#execute" do

    it "creates a CSV for the specified content" do
      outcome = mutation.run(mutation_params)

      expect(outcome.result).to include("Name")
    end
  end

Answer 1

你可以算一下换行符：

expect(outcome.result.split("\n").size).to eq(10)

Answer 2

outcome.lines.count 

gives you the total number of rows

so expect(outcome.lines.count).to eq(10) should help