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pkg/integration/components/matcher.go
65 строк
1 KB
Jesse Duffield
Support matchers on integers in integration tests
03 июн 2023, 08:32
03 июн 2023, 08:32
dd34adb
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package components import ( "strings" "github.com/samber/lo" ) // for making assertions on string values type Matcher[T any] struct { rules []matcherRule[T] // this is printed when there's an error so that it's clear what the context of the assertion is prefix string } type matcherRule[T any] struct { // e.g. "contains 'foo'" name string // returns a bool that says whether the test passed and if it returns false, it // also returns a string of the error message testFn func(T) (bool, string) } func (self *Matcher[T]) name() string { if len(self.rules) == 0 { return "anything" } return strings.Join( lo.Map(self.rules, func(rule matcherRule[T], _ int) string { return rule.name }), ", ", ) } func (self *Matcher[T]) test(value T) (bool, string) { for _, rule := range self.rules { ok, message := rule.testFn(value) if ok { continue } if self.prefix != "" { return false, self.prefix + " " + message } return false, message } return true, "" } func (self *Matcher[T]) appendRule(rule matcherRule[T]) *Matcher[T] { self.rules = append(self.rules, rule) return self } // adds context so that if the matcher test(s) fails, we understand what we were trying to test. // E.g. prefix: "Unexpected content in view 'files'." func (self *Matcher[T]) context(prefix string) *Matcher[T] { self.prefix = prefix return self }