我正在使用红宝石1.9,我正在尝试做BDD.我的第一个测试’应该读取在csv的作品,但第二个我需要一个文件对象被嘲笑没有.
这是我的型号规格：
require 'spec_helper'
describe Person do
describe "Importing data" do
let(:person) { Person.new }
let(:data) { "title\tsurname\tfirstname\t\rtitle2\tsurname2\tfirstname2\t\r"}
let(:result) {[["title","surname","firstname"],["title2","surname2","firstname2"]] }
it "should read in the csv" do
CSV.should_receive(:read).
with("filename",:row_sep => "\r",:col_sep => "\t")
person.import("filename")
end
it "should have result" do
filename = mock(File,:exists? => true,:read => data)
person.import(filename).should eq(result)
end
end
end
以下是到目前为止的代码：
class Person < ActiveRecord::Base
attr_accessor :import_file
def import(filename)
CSV.read(filename,:col_sep => "\t")
end
end
解决方法
你可以存档File.open：
let(:data) { "title\tsurname\tfirstname\rtitle2\tsurname2\tfirstname2\r" }
let(:result) {[["title","firstname2"]] }
it "should parse file contents and return a result" do
expect(File).to receive(:open).with("filename","rb") { StringIO.new(data) }
person.import("filename").should eq(result)
end
StringIO基本上包装一个字符串,使其表现得像一个IO对象(在这种情况下为File)