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package matchers
import (
"fmt"
"reflect"
"github.com/onsi/gomega/format"
)
type AssignableToTypeOfMatcher struct {
Expected interface{}
}
func (matcher *AssignableToTypeOfMatcher) Match(actual interface{}) (success bool, err error) {
if actual == nil && matcher.Expected == nil {
return false, fmt.Errorf("Refusing to compare <nil> to <nil>.\nBe explicit and use BeNil() instead. This is to avoid mistakes where both sides of an assertion are erroneously uninitialized.")
} else if matcher.Expected == nil {
return false, fmt.Errorf("Refusing to compare type to <nil>.\nBe explicit and use BeNil() instead. This is to avoid mistakes where both sides of an assertion are erroneously uninitialized.")
} else if actual == nil {
return false, nil
}
actualType := reflect.TypeOf(actual)
expectedType := reflect.TypeOf(matcher.Expected)
return actualType.AssignableTo(expectedType), nil
}
func (matcher *AssignableToTypeOfMatcher) FailureMessage(actual interface{}) string {
return format.Message(actual, fmt.Sprintf("to be assignable to the type: %T", matcher.Expected))
}
func (matcher *AssignableToTypeOfMatcher) NegatedFailureMessage(actual interface{}) string {
return format.Message(actual, fmt.Sprintf("not to be assignable to the type: %T", matcher.Expected))
}
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