RSpec测试：NoMethodError：nil的未定义方法：NilClass-Java 学习之路

我有一个rspec测试的问题 . 一切似乎都在我的localhost中工作，但我的测试仍然失败：

失败/错误：new_file.content_type.start_with？ “应用/ PDF”

NoMethodError：nil的未定义方法'content_type'：NillClass

RSpec file

# frozen_string)_literal: true

require "rails_helper"

    RSpec.describe DocumentLibraryService do
      context "sorts documents" do
        it "sorts and returns only the 6 most recent" do
          developer = create(:developer)
          document1 = build(:document, title: "Developer document 2", file: "Document2.pdf", documentable: developer)
          document2 = build(:document, title: "Developer document 5", file: "Document5.pdf", documentable: developer)
          document3 = build(:document, title: "Developer document 7", file: "Document7.pdf", documentable: developer)
          document4 = build(:document, title: "Developer document 8", file: "Document8.pdf", documentable: developer)
          document5 = build(:document, title: "Developer document 9", file: "Document9.pdf", documentable: developer)
          document6 = build(:document, title: "Developer document 20", file: "Document9.pdf", documentable: developer)
          document7 = build(:document, title: "Developer document 4", file: "Document9.pdf", documentable: developer)
          documents = []
          documents.push(document1, document2, document3, document4, document5, document6, document7)
          result = described_class.call(documents, [])

          expect(result.count).to eq(6)
          expect(result[0][:name]).to eq(document7.title)
          expect(result[1][:name]).to eq(document6.title)
          expect(result[2][:name]).to eq(document5.title)
          expect(result[3][:name]).to eq(document4.title)
          expect(result[4][:name]).to eq(document3.title)
          expect(result[5][:name]).to eq(document2.title)
        end
      end
    end

失败是引用上传者的一部分：

version :preview, if: :not_svg? do
    process convert: :jpg

    def full_filename(for_file = model.file)
      super.chomp(File.extname(super)) + ".jpg"
  end

  def type_pdf?
    pdf?(file)
  end

  protected

  def not_svg?(new_file)
    !new_file.content_type.start_with? "image/svg+xml"
    !new_file.content_type.start_with? "application/pdf"
  end

  def pdf?(new_file)
    new_file.content_type.start_with? "application/pdf"
  end

在以下上下文中从两个地方调用：

def library_preview_url(file)
    if file.type_pdf?
      return("pdf_icon.jpg")
    else
      return file.preview.url(response_content_type: %( "image/jpeg" )) if file.preview.present?

      file.url(response_content_type: %( "image/svg+xml"))
    end
  end

正如我之前提到的，一切都在我的localhost中按预期工作，我无法看到是什么让这个测试失败 .

引用pdf文件的所有部分都是新添加的部分;在这些被添加之前，测试正在通过，这已经缩小了（我相信？）到调用type_pdf的问题？

RSpec测试：NoMethodError：nil的未定义方法：NilClass

相关问题