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使用VCR测试不回滚数据库更改

2016-05-31 104 views
1

我一直在处理一组失败，其中启用了VCR的测试向我的Projects表中添加了一条附加记录，并且该记录在其他测试中持续存在，导致失败，而不是在测试结束时回滚。具体来说，我有4个由我的Rails灯具创建的项目，然后进行包含VCR磁带的测试以添加额外的项目。该测试总是通过，但数据库之后不会重置为4个项目。使用VCR测试不回滚数据库更改

方便，该项目是开源的，所以你可以自己运行它。主人可以在https://github.com/linuxfoundation/cii-best-practices-badge（checkout commit 048776f，以免临时解决方法）中看到该错误。导致问题的测试是https://github.com/linuxfoundation/cii-best-practices-badge/blob/master/test/features/github_login_test.rb（带有VCR录像带）登录到Github并从测试用户获取公共项目列表。它通过https://github.com/blowmage/minitest-rails-capybara宝石使用水豚。

与SEED=41779 rake test一起运行时，VCR使用测试成功，但后来的测试失败，因为它计数5而不是4个项目。

以下是测试日志，您可以在其中看到最后调用了ROLLBACK，但在测试开始时从未指定SAVEPOINT。

--------------------------------------------------- 
GithubLoginTest: test_0001_Has link to GitHub Login 
--------------------------------------------------- 
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Completed 200 OK in 6ms (Views: 4.7ms | ActiveRecord: 0.0ms) 
Started GET "/projects/new" for 127.0.0.1 at 2016-05-30 22:02:03 -0400 
Processing by ProjectsController#new as HTML 
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    Rendered projects/new.html.erb within layouts/application (8.6ms) 
    Rendered layouts/_header.html.erb (1.5ms) 
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Completed 200 OK in 28ms (Views: 25.0ms | ActiveRecord: 0.0ms) 
Started POST "/auth/github" for 127.0.0.1 at 2016-05-30 22:02:03 -0400 
Started GET "/auth/github/callback" for 127.0.0.1 at 2016-05-30 22:02:03 -0400 
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Started GET "/" for 127.0.0.1 at 2016-05-30 22:02:03 -0400 
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Completed 200 OK in 6ms (Views: 4.3ms | ActiveRecord: 0.2ms) 
Started GET "/projects/new" for 127.0.0.1 at 2016-05-30 22:02:03 -0400 
Processing by ProjectsController#new as HTML 
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Completed 200 OK in 41ms (Views: 38.6ms | ActiveRecord: 0.2ms) 
Started POST "/projects" for 127.0.0.1 at 2016-05-30 22:02:03 -0400 
Processing by ProjectsController#create as HTML 
    Parameters: {"utf8"=>"✓", "project"=>{"repo_url"=>"https://github.com/ciitest/cii-best-practices-badge"}, "commit"=>"Submit GitHub Repository"} 
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Completed 302 Found in 117ms (ActiveRecord: 4.3ms) 
Started GET "/projects/980190963/edit" for 127.0.0.1 at 2016-05-30 22:02:03 -0400 
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    Parameters: {"id"=>"980190963"} 
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    Rendered projects/_status_chooser.html.erb (2.2ms) 
    Rendered projects/_details.html.erb (0.0ms) 
    Rendered projects/_status_chooser.html.erb (2.3ms) 
    Rendered projects/_form.html.erb (202.1ms) 
    Rendered projects/edit.html.erb within layouts/application (202.6ms) 
    Rendered layouts/_header.html.erb (0.7ms) 
    Rendered layouts/_footer.html.erb (1.3ms) 
Completed 200 OK in 214ms (Views: 207.2ms | ActiveRecord: 1.1ms) 
Started GET "https://stackoverflow.com/users/764040364" for 127.0.0.1 at 2016-05-30 22:02:04 -0400 
Processing by UsersController#show as HTML 
    Parameters: {"id"=>"764040364"} 
    [1m[35mUser Load (0.2ms)[0m SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1 [["id", 764040364]] 
    [1m[36mUser Load (0.7ms)[0m [1mSELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1[0m [["id", 764040364]] 
    [1m[35mProject Load (3.6ms)[0m SELECT "projects".* FROM "projects" WHERE "projects"."repo_url" IN ('https://github.com/ciitest/cii-best-practices-badge', 'https://github.com/ciitest/test-repo') ORDER BY "projects"."created_at" ASC 
    [1m[36mProject Load (1.1ms)[0m [1mSELECT "projects".* FROM "projects" WHERE "projects"."user_id" = $1 ORDER BY "projects"."created_at" ASC LIMIT 30 OFFSET 0[0m [["user_id", 764040364]] 
    [1m[35mProject Exists (0.3ms)[0m SELECT 1 AS one FROM "projects" WHERE "projects"."user_id" = $1 LIMIT 1 [["user_id", 764040364]] 
    Rendered projects/_table.html.erb (2.3ms) 
    Rendered users/show.html.erb within layouts/application (6.9ms) 
    Rendered layouts/_header.html.erb (1.1ms) 
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Completed 200 OK in 48ms (Views: 13.5ms | ActiveRecord: 5.9ms) 
Started GET "/projects/980190963/badge" for 127.0.0.1 at 2016-05-30 22:02:04 -0400 
Processing by ProjectsController#badge as SVG 
    Parameters: {"id"=>"980190963"} 
    [1m[36mUser Load (0.2ms)[0m [1mSELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1[0m [["id", 764040364]] 
    [1m[35mProject Load (0.8ms)[0m SELECT "projects".* FROM "projects" WHERE "projects"."id" = $1 ORDER BY "projects"."created_at" ASC LIMIT 1 [["id", 980190963]] 
    Rendered text template (0.0ms) 
Sent data (0.7ms) 
Completed 200 OK in 8ms (Views: 0.6ms | ActiveRecord: 1.0ms) 
    [1m[36m (0.3ms)[0m [1mROLLBACK[0m 
    [1m[35m (0.1ms)[0m BEGIN 
----------------------------------------------

与后面的测试，设置SAVEPOINT和ROLLBACK正常进行对比：

-------------------------------------------------------- 
ProjectStatTest: test_project_stat_matches_expect_values 
-------------------------------------------------------- 
    [1m[36m (0.0ms)[0m [1mSAVEPOINT active_record_1[0m 
    [1m[35m (0.0ms)[0m SELECT COUNT(*) FROM "projects" WHERE ("projects"."badge_percentage" >= 0) 
    [1m[36m (0.0ms)[0m [1mSELECT COUNT(*) FROM "projects" WHERE ("projects"."badge_percentage" >= 25)[0m 
    [1m[35m (0.0ms)[0m SELECT COUNT(*) FROM "projects" WHERE ("projects"."badge_percentage" >= 50) 
    [1m[36m (0.0ms)[0m [1mSELECT COUNT(*) FROM "projects" WHERE ("projects"."badge_percentage" >= 75)[0m 
    [1m[35m (0.0ms)[0m SELECT COUNT(*) FROM "projects" WHERE ("projects"."badge_percentage" >= 90) 
    [1m[36m (0.0ms)[0m [1mSELECT COUNT(*) FROM "projects" WHERE ("projects"."badge_percentage" >= 100)[0m 
    [1m[35m (0.0ms)[0m SELECT COUNT(*) FROM "projects" WHERE ("projects"."created_at" >= '2015-02-28 12:00:00.000000') 
    [1m[36m (0.0ms)[0m [1mSELECT COUNT(*) FROM "projects" WHERE ("projects"."updated_at" >= '2015-02-28 12:00:00.000000')[0m 
    [1m[35mSQL (0.0ms)[0m INSERT INTO "project_stats" ("created_at", "updated_at", "percent_ge_0", "percent_ge_25", "percent_ge_50", "percent_ge_75", "percent_ge_90", "percent_ge_100", "created_since_yesterday", "updated_since_yesterday") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10) RETURNING "id" [["created_at", "2015-03-01 12:00:00.000000"], ["updated_at", "2015-03-01 12:00:00.000000"], ["percent_ge_0", 5], ["percent_ge_25", 2], ["percent_ge_50", 2], ["percent_ge_75", 2], ["percent_ge_90", 1], ["percent_ge_100", 1], ["created_since_yesterday", 5], ["updated_since_yesterday", 0]] 
    [1m[36m (0.0ms)[0m [1mRELEASE SAVEPOINT active_record_1[0m 
    [1m[35m (0.1ms)[0m ROLLBACK 
    [1m[36m (0.1ms)[0m [1mBEGIN[0m 
--------------------------------------------

任何想法如何得到这个测试设置SAVEPOINT，使ROLLBACK会成功吗？我怀疑我遇到了录像机（我在https://github.com/vcr/vcr/issues/586提交）的错误，但很难确定。

来源

2016-05-31 dankohn

回答

0

从快速浏览它看起来像你正在使用事务性测试标记js：true - 这是行不通的，因为当使用支持JS Capybara的驱动程序加载正在单独线程中测试的应用程序。每个线程（测试和应用程序）都有自己的连接到数据库，并且在一个线程中启动的事务在其提交之前对其他线程是不可见的（这可能不会由于事务测试而发生）。这也意味着在应用程序中创建的记录不会被清理，因为它们并未在回滚的测试事务中实际创建。你可能想看看像DatabaseCleaner一样用于你的js：真正的标记测试 - 混合https://github.com/DatabaseCleaner/database_cleaner#minitest-example和https://github.com/DatabaseCleaner/database_cleaner#rspec-with-capybara-example是一个很好的起始位置

来源

2016-05-31 22:26:21

+0

感谢您的建议！我会检查出来的。 – dankohn

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