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package matchers
import (
"fmt"
"github.com/onsi/gomega/format"
"reflect"
)
type BeClosedMatcher struct {
}
func (matcher *BeClosedMatcher) Match(actual interface{}) (success bool, err error) {
if !isChan(actual) {
return false, fmt.Errorf("BeClosed matcher expects a channel. Got:\n%s", format.Object(actual, 1))
}
channelType := reflect.TypeOf(actual)
channelValue := reflect.ValueOf(actual)
if channelType.ChanDir() == reflect.SendDir {
return false, fmt.Errorf("BeClosed matcher cannot determine if a send-only channel is closed or open. Got:\n%s", format.Object(actual, 1))
}
winnerIndex, _, open := reflect.Select([]reflect.SelectCase{
reflect.SelectCase{Dir: reflect.SelectRecv, Chan: channelValue},
reflect.SelectCase{Dir: reflect.SelectDefault},
})
var closed bool
if winnerIndex == 0 {
closed = !open
} else if winnerIndex == 1 {
closed = false
}
return closed, nil
}
func (matcher *BeClosedMatcher) FailureMessage(actual interface{}) (message string) {
return format.Message(actual, "to be closed")
}
func (matcher *BeClosedMatcher) NegatedFailureMessage(actual interface{}) (message string) {
return format.Message(actual, "to be open")
}
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