Michael Hartl的Rails教程第12章 - 所有54個測試都失敗了......？

Question

所以我參加了Michael Hartl的Rails教程，第12章，列出了12.7。

我已經寫了一些測試書，但是所有54個測試最終都出現了錯誤。 前幾個是：

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)

繼續......

這是我的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

我懷疑在relationship_test.rb中可能有問題，但我甚至不知道從哪里開始所有這些錯誤。 有人能指出我正確的方向嗎？ 謝謝。

Answer 1

我已經解決了。

我的relationships.yml有：

one:
   follower_id: 1
   followed_id: 1

 two:
   follower_id: 1
   followed_id: 1

這導致測試失敗。 我已將它們評論出來，並且有0個錯誤，但有一個失敗。

Answer 2

根據邁克爾的教程

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

你必須刪除test/fixtures/relationships.yml所有內容

並且測試將通過:)

原因是測試將檢查關系的唯一性，我們只是在fixture文件中創建兩個相同的關系。

Answer 3

您的測試數據庫似乎在上次測試后沒有被截斷，並且您的關系表中已經有一條記錄集中的記錄，其中follower_id = 1且follow_id = 1。

創建索引

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

在您的關系中，遷移意味着每個follower_id / follows_id組合都是唯一的。