elixir - 如何使用 mix 来运行测试

Question

更新:对于从 Google 提出此问题的任何人，您可以通过运行 mix test 来运行给定 Elixir 项目的测试。

根据 the docs , Elixir 脚本文件(扩展名为 .exs)在运行前不需要编译。

以下是 Elixir 文档的准确引用:

the test file is an Elixir script file (.exs). This is convenient because we don't need to compile test files before running them

<小时/>

所以我将模块文件和测试文件添加到 faker 库 here

我已经通过在项目根目录中运行 mixcompile 编译了该项目。

当我尝试使用 mix test 运行除新测试文件之外的所有测试文件时，就会出现问题。我收到以下错误:

** (CompileError) test/faker/shakespeare_test.exs:3: module Faker.Shakespeare is not loaded and could not be found
    (stdlib) lists.erl:1353: :lists.mapfoldl/3
    (stdlib) lists.erl:1354: :lists.mapfoldl/3

错误表明无法找到该模块，但它显然在 bin 中。我做错了什么？

lib/Shakespeare.ex 的内容是:

defmodule Shakespeare do

  def hamlet_quote do
    Enum.at(hamlet, :crypto.rand_uniform(0, Enum.count(hamlet)))
  end

  def as_you_like_it_quote do
    Enum.at(as_you_like_it, :crypto.rand_uniform(0, Enum.count(as_you_like_it)))
  end

  def king_richard_iii_quote do
    Enum.at(king_richard_iii, :crypto.rand_uniform(0, Enum.count(king_richard_iii)))
  end

  def romeo_and_juliet_quote do
    Enum.at(romeo_and_juliet, :crypto.rand_uniform(0, Enum.count(romeo_and_juliet)))
  end

  def hamlet do
      ["To be, or not to be: that is the question.",
       "Neither a borrower nor a lender be; For loan oft loses both itself and friend, and borrowing dulls the edge of husbandry.",
       "This above all: to thine own self be true.",
       "Though this be madness, yet there is method in 't.",
       "That it should come to this!.",
       "There is nothing either good or bad, but thinking makes it so.",
       "What a piece of work is man! how noble in reason! how infinite in faculty! in form and moving how express and admirable! in action how like an angel! in apprehension how like a god! the beauty of the world, the paragon of animals! .",
       "The lady doth protest too much, methinks.",
       "In my mind's eye.",
       "A little more than kin, and less than kind.",
       "The play 's the thing wherein I'll catch the conscience of the king.",
       "And it must follow, as the night the day, thou canst not then be false to any man.",
       "Brevity is the soul of wit.",
       "Doubt that the sun doth move, doubt truth to be a liar, but never doubt I love.",
       "Rich gifts wax poor when givers prove unkind.",
       "Do you think I am easier to be played on than a pipe?",
       "I will speak daggers to her, but use none.",
       "When sorrows come, they come not single spies, but in battalions."]
  end

  def as_you_like_it do
      ["All the world 's a stage, and all the men and women merely players. They have their exits and their entrances; And one man in his time plays many parts.",
       "Can one desire too much of a good thing?.",
       "I like this place and willingly could waste my time in it.",
       "How bitter a thing it is to look into happiness through another man's eyes!",
       "Blow, blow, thou winter wind! Thou art not so unkind as man's ingratitude.",
       "True is it that we have seen better days.",
       "For ever and a day.",
       "The fool doth think he is wise, but the wise man knows himself to be a fool."]
  end

  def king_richard_iii do
      ["Now is the winter of our discontent.",
       "A horse! a horse! my kingdom for a horse!.",
       "Conscience is but a word that cowards use, devised at first to keep the strong in awe.",
       "So wise so young, they say, do never live long.",
       "Off with his head!",
       "An honest tale speeds best, being plainly told.",
       "The king's name is a tower of strength.",
       "The world is grown so bad, that wrens make prey where eagles dare not perch."]
  end

  def romeo_and_juliet do
      ["O Romeo, Romeo! wherefore art thou Romeo?.",
       "It is the east, and Juliet is the sun.",
       "Good Night, Good night! Parting is such sweet sorrow, that I shall say good night till it be morrow.",
       "What's in a name? That which we call a rose by any other name would smell as sweet.",
       "Wisely and slow; they stumble that run fast.",
       "Tempt not a desperate man.",
       "For you and I are past our dancing days.",
       "O! she doth teach the torches to burn bright.",
       "It seems she hangs upon the cheek of night like a rich jewel in an Ethiope's ear.",
       "See, how she leans her cheek upon her hand! O that I were a glove upon that hand, that I might touch that cheek!.",
       "Not stepping o'er the bounds of modesty."]
  end

 end

test/Shakespeare_test.ex的内容是:

defmodule Faker.ShakespeareTest do
  use ExUnit.Case, async: true
  import Faker.Shakespeare

  test :hamlet_quote do
    assert String.length(hamlet_quote) != 0
    assert Regex.match?(~r/.+/, hamlet_quote)
  end

  test :as_you_like_it_quote do
    assert String.length(as_you_like_it_quote) != 0
    assert Regex.match?(~r/.+/, as_you_like_it_quote)
  end

  test :king_richard_iii_quote do
    assert String.length(king_richard_iii_quote) != 0
    assert Regex.match?(~r/.+/, king_richard_iii_quote)
  end

  test :romeo_and_juliet_quote do
    assert String.length(romeo_and_juliet_quote) != 0
    assert Regex.match?(~r/.+/, romeo_and_juliet_quote)
  end
end

Answer 1

您正在定义模块(不是类)Shakespeare，但您的测试正在使用模块Faker.Shakespeare。

如果您将模块名称正确定义为 defmodule Faker.Shakespeare，它应该可以工作。