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package matchers
import (
"fmt"
"reflect"
"github.com/onsi/gomega/format"
)
type PanicMatcher struct {
object interface{}
}
func (matcher *PanicMatcher) Match(actual interface{}) (success bool, err error) {
if actual == nil {
return false, fmt.Errorf("PanicMatcher expects a non-nil actual.")
}
actualType := reflect.TypeOf(actual)
if actualType.Kind() != reflect.Func {
return false, fmt.Errorf("PanicMatcher expects a function. Got:\n%s", format.Object(actual, 1))
}
if !(actualType.NumIn() == 0 && actualType.NumOut() == 0) {
return false, fmt.Errorf("PanicMatcher expects a function with no arguments and no return value. Got:\n%s", format.Object(actual, 1))
}
success = false
defer func() {
if e := recover(); e != nil {
matcher.object = e
success = true
}
}()
reflect.ValueOf(actual).Call([]reflect.Value{})
return
}
func (matcher *PanicMatcher) FailureMessage(actual interface{}) (message string) {
return format.Message(actual, "to panic")
}
func (matcher *PanicMatcher) NegatedFailureMessage(actual interface{}) (message string) {
return format.Message(actual, fmt.Sprintf("not to panic, but panicked with\n%s", format.Object(matcher.object, 1)))
}
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