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Test mit VCR Rollback nicht zurück Datenbankänderungen

2016-05-31 22 views
1

Ich habe mich mit einer Reihe von Fehlern beschäftigt, bei denen ein VCR-fähiger Test einen zusätzlichen Datensatz zu meiner Projects-Tabelle hinzufügt und dieser Datensatz über weitere Tests hinweg besteht und Fehler verursacht zurückgerollt am Ende des Tests. Insbesondere habe ich 4 Projekte, die von meinen Rails-Geräten erstellt wurden, und dann einen Test, der eine VCR-Kassette enthält, um ein zusätzliches Projekt hinzuzufügen. Dieser Test wird immer bestanden, aber die Datenbank wird danach nicht auf die 4 Projekte zurückgesetzt.Test mit VCR Rollback nicht zurück Datenbankänderungen

Praktisch ist das Projekt Open Source, so dass Sie es selbst ausführen können. Der Fehler kann auf Master unter https://github.com/linuxfoundation/cii-best-practices-badge (check commit 048776f, um keine temporäre Problemumgehung zu erhalten) angezeigt werden. Der Test, der das Problem verursacht, ist https://github.com/linuxfoundation/cii-best-practices-badge/blob/master/test/features/github_login_test.rb, der sich (mit einer VCR-Kassette) bei Github anmeldet und die Liste der öffentlichen Projekte von einem Testbenutzer abruft. Es verwendet Capybara über den https://github.com/blowmage/minitest-rails-capybara Edelstein.

Bei Ausführung mit SEED=41779 rake test ist der VCR-Verwendungstest erfolgreich, aber ein späterer Test schlägt fehl, weil er 5 statt 4 Projekte zählt.

Hier ist das Testprotokoll, wo Sie sehen können, dass ein ROLLBACK am Ende aufgerufen wird, aber ein SAVEPOINT wurde nie zu Beginn des Tests angegeben.

--------------------------------------------------- 
GithubLoginTest: test_0001_Has link to GitHub Login 
--------------------------------------------------- 
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----------------------------------------------

Kontrast dies mit einem späteren Test, der SAVEPOINT und ROLLBACK normalerweise setzt:

-------------------------------------------------------- 
ProjectStatTest: test_project_stat_matches_expect_values 
-------------------------------------------------------- 
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--------------------------------------------

Irgendwelche Ideen, wie dieser Test bekommen eine SAVEPOINT so einzustellen, dass die ROLLBACK erfolgreich sein wird? Ich vermute, dass ich auf einen Virus mit VCR stoße (den ich bei https://github.com/vcr/vcr/issues/586 abgelegt habe), aber es ist schwer sicher zu sein.

Quelle

2016-05-31 dankohn

Antwort

0

Aus einem kurzen Blick sieht es aus, als ob Sie transaktionale Tests mit Tests js: true verwenden - das funktioniert nicht, da bei Verwendung von Treibern, die JS Capybara unterstützen, die zu testende App in einem separaten Thread geladen wird. Jeder Thread (die Tests und die App) haben dann ihre eigene Verbindung zur Datenbank, und eine in einem Thread gestartete Transaktion ist für den anderen Thread erst sichtbar, wenn sie festgeschrieben wurde (was aufgrund von Transaktionstests möglicherweise nie passieren wird). Dies bedeutet auch, dass in der App erstellte Datensätze nicht bereinigt werden, da sie in der Testtransaktion, die zurückgesetzt wird, nicht erstellt wurden. Sie möchten wahrscheinlich etwas wie DatabaseCleaner für die Verwendung mit Ihrem js aussehen: True getaggte Tests - eine Mischung aus https://github.com/DatabaseCleaner/database_cleaner#minitest-example und https://github.com/DatabaseCleaner/database_cleaner#rspec-with-capybara-example ist ein guter Ausgangspunkt

Quelle

2016-05-31 22:26:21

+0

Vielen Dank für den Vorschlag! Ich werde das überprüfen. – dankohn

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