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package matchers
import (
"fmt"
"reflect"
"github.com/onsi/gomega/format"
)
type PanicMatcher struct {
Expected interface{}
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
if matcher.Expected == nil {
success = true
return
}
valueMatcher, valueIsMatcher := matcher.Expected.(omegaMatcher)
if !valueIsMatcher {
valueMatcher = &EqualMatcher{Expected: matcher.Expected}
}
success, err = valueMatcher.Match(e)
if err != nil {
err = fmt.Errorf("PanicMatcher's value matcher failed with:\n%s%s", format.Indent, err.Error())
}
}
}()
reflect.ValueOf(actual).Call([]reflect.Value{})
return
}
func (matcher *PanicMatcher) FailureMessage(actual interface{}) (message string) {
if matcher.Expected == nil {
// We wanted any panic to occur, but none did.
return format.Message(actual, "to panic")
}
if matcher.object == nil {
// We wanted a panic with a specific value to occur, but none did.
switch matcher.Expected.(type) {
case omegaMatcher:
return format.Message(actual, "to panic with a value matching", matcher.Expected)
default:
return format.Message(actual, "to panic with", matcher.Expected)
}
}
// We got a panic, but the value isn't what we expected.
switch matcher.Expected.(type) {
case omegaMatcher:
return format.Message(
actual,
fmt.Sprintf(
"to panic with a value matching\n%s\nbut panicked with\n%s",
format.Object(matcher.Expected, 1),
format.Object(matcher.object, 1),
),
)
default:
return format.Message(
actual,
fmt.Sprintf(
"to panic with\n%s\nbut panicked with\n%s",
format.Object(matcher.Expected, 1),
format.Object(matcher.object, 1),
),
)
}
}
func (matcher *PanicMatcher) NegatedFailureMessage(actual interface{}) (message string) {
if matcher.Expected == nil {
// We didn't want any panic to occur, but one did.
return format.Message(actual, fmt.Sprintf("not to panic, but panicked with\n%s", format.Object(matcher.object, 1)))
}
// We wanted a to ensure a panic with a specific value did not occur, but it did.
switch matcher.Expected.(type) {
case omegaMatcher:
return format.Message(
actual,
fmt.Sprintf(
"not to panic with a value matching\n%s\nbut panicked with\n%s",
format.Object(matcher.Expected, 1),
format.Object(matcher.object, 1),
),
)
default:
return format.Message(actual, "not to panic with", matcher.Expected)
}
}
|
