Michael Hartl 的 Rails 教程第 12 章——所有 54 个测试都失败了...？

Question

所以我在看 Michael Hartl 的 Rails 教程，第 12 章，清单 12.7。

我已经按照本书的要求编写了一些测试，但是所有 54 个测试都以错误告终。前几位是：

ERROR["test_should_require_a_followed_id", RelationshipTest, 0.686335129]
 test_should_require_a_followed_id#RelationshipTest (0.69s)
ActiveRecord::RecordNotUnique:         ActiveRecord::RecordNotUnique: SQLite3::ConstraintException: UNIQUE constraint failed: relationships.follower_id, relationships.followed_id: INSERT INTO "relationships" ("follower_id", "followed_id", "created_at", "updated_at", "id") VALUES (1, 1, '2015-03-10 16:12:17', '2015-03-10 16:12:17', 298486374)


ERROR["test_should_be_valid", RelationshipTest, 0.835273632]
 test_should_be_valid#RelationshipTest (0.84s)
ActiveRecord::RecordNotUnique:         ActiveRecord::RecordNotUnique: SQLite3::ConstraintException: UNIQUE constraint failed: relationships.follower_id, relationships.followed_id: INSERT INTO "relationships" ("follower_id", "followed_id", "created_at", "updated_at", "id") VALUES (1, 1, '2015-03-10 16:12:17', '2015-03-10 16:12:17', 298486374)


ERROR["test_should_require_a_follower_id", RelationshipTest, 0.988648702]
 test_should_require_a_follower_id#RelationshipTest (0.99s)
ActiveRecord::RecordNotUnique:         ActiveRecord::RecordNotUnique: SQLite3::ConstraintException: UNIQUE constraint failed: relationships.follower_id, relationships.followed_id: INSERT INTO "relationships" ("follower_id", "followed_id", "created_at", "updated_at", "id") VALUES (1, 1, '2015-03-10 16:12:18', '2015-03-10 16:12:18', 298486374)


ERROR["test_password_resets", PasswordResetsTest, 1.071410052]
 test_password_resets#PasswordResetsTest (1.07s)
ActiveRecord::RecordNotUnique:         ActiveRecord::RecordNotUnique: SQLite3::ConstraintException: UNIQUE constraint failed: relationships.follower_id, relationships.followed_id: INSERT INTO "relationships" ("follower_id", "followed_id", "created_at", "updated_at", "id") VALUES (1, 1, '2015-03-10 16:12:18', '2015-03-10 16:12:18', 298486374)

并继续...

这是我的 relationship_test.rb:

require 'test_helper'

class RelationshipTest < ActiveSupport::TestCase

  def setup
    @relationship = Relationship.new(follower_id: 1, followed_id: 2)
  end

  test "should be valid" do
    assert @relationship.valid?
  end

  test "should require a follower_id" do
    @relationship.follower_id = nil
    assert_not @relationship.valid?
  end

  test "should require a followed_id" do
    @relationship.followed_id = nil
    assert_not @relationship.valid?
  end
end

我怀疑 relationship_test.rb 中可能有问题，但我什至不知道从哪里开始所有这些错误。有人能指出我正确的方向吗？谢谢。

Answer 1

您的测试数据库似乎在您上次测试后没有被截断，并且您已经在您的关系 table 中有一个记录集，其中 follower_id = 1 和 followed_id = 1.

正在创建索引

add_index :relationships, [:follower_id, :followed_id], unique: true

在您的关系迁移中，每个 follower_id/followed_id 组合都必须是唯一的。

Answer 2

我已经解决了

我的 relationships.yml 有：

one:
   follower_id: 1
   followed_id: 1

 two:
   follower_id: 1
   followed_id: 1

导致测试失败。我已经把它们注释掉了，有 0 个错误，但 1 个失败。

Answer 3

根据迈克尔的教程

Listing 12.6: Removing the contents of the relationship fixture.
test/fixtures/relationships.yml
# empty

您必须删除 test/fixtures/relationships.yml

的所有内容

测试将通过:)

原因是测试会检查关系的唯一性，而我们只是在夹具文件中创建两个相同的关系。

Michael Hartl 的 Rails 教程第 12 章——所有 54 个测试都失败了...？

Michael Hartl's Rails tutorial chapter 12-- all 54 tests failed...?

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