Тестирование в Go

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Тестирование в Golang Алик Хилажев Marketplace Technologies

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Продукты • KazanExpress.ru • eco.KazanExeress.ru • ЛК для продавцов sellers.kazanexpress.ru • Приложения для iOS и Android

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План • Основы (go test, TestXXX, BenchmarkXXX) • TableDrivenTests • assert либы: за и против • Mock • suit testing

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pkg/testing • TestXXX(t *testing.T) • название файлов - xxx_test.go • запуск через go test …

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go test

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go test

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benchmarks

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TableDrivenTests

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TableDrivenTests

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asserts за и против • No doubt assertion libs can reduce typing and repetition. • Reductions in typing with assertion libs are not profound. • The necessary repetition without assertion libs can be minimised. • Some repetition locally can increase readability at no great cost. • Some assertion libs tend to reduce the value of tests as documentation. • You are adding another (often large) library dependency with associated maintenance overhead, bugs, life cycle etc. • It is a commitment that will stay with you for a long time, and it is expensive to undo. http://danmux.com/posts/the_cult_of_go_test/

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asserts за и против • Type safety is often dropped - or needs explicit knowledge, or is only enforced at runtime. • There is a DSL to learn - often considerable - an extra burden on the team and new members forever. • The libs often introduce multiple ways to achieve the same thing, or worse: similar but subtly diﬀerent ways. • It does not resolve the inﬁghting - a new dev will argue for their favourite lib. • Adding the assertion lib in the middle of a project adds an annoying inconsistency. http://danmux.com/posts/the_cult_of_go_test/

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mocks mockgen github.com/alikhil/go-testing/internal/repository Repository

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mocks

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