You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: error_collector_test.rb
    path of file: ./repos/json_api_client/test/unit
    
    the code of the file until where you have to start completion: require 'test_helper'

class ErrorCollectorTest < Minitest::Test

  def test_can_handle_no_errors
    stub_request(:post, "http://example.com/articles")
      .with(headers: {content_type: "application/vnd.api+json", accept: "application/vnd.api+json"}, body: {
          data: {
            type: "articles",
            attributes: {
              title: "Rails is Omakase"
            }
          }
        }.to_json)
      .to_return(headers: {content_type: "application/vnd.api+json"}, body: {
        data: {
          id: "1",
          type: "articles",
      
    
  def test_can_handle_explicit_null_error_values
      stub_request(:post, "http://example.com/articles")
        .with(headers: {content_type: "application/vnd.api+json", accept: "application/vnd.api+json"}, body: {
            data: {
              type: "articles",
              attributes: {
                title: "Rails is Omakase",
                email_address: "bar"
              }
            }
          }.to_json)
        .to_return(headers: {content_type: "application/vnd.api+json"}, body: {
          errors: [
            {
              id: "1337",
              links: nil,
              status: nil,
              code: nil,
              title: nil,
              detail: nil,
              source: nil,
              meta: nil
            }
          ]
        }.to_json)

      article = Article.create({
        title: "Rails is Omakase",
        email_address: "bar"
      })
      assert !article.persisted?
      assert article.errors.present?
      assert_equal 1, article.errors.size

      assert_equal ["invalid"], article.errors[:base]

      error = article.last_result_set.errors.first
      assert_equal "1337", error.id

      assert_equal({}, error.about, nil)
      assert_nil(error.status, nil)
      assert_nil(error.code, nil)
      assert_nil(error.title, nil)
      assert_nil(error.detail, nil)
      assert_equal({}, error.source, nil)
      assert_equal({}, error.meta.attributes,nil)
  end