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// Copyright 2012 Aaron Jacobs. All Rights Reserved.
// Author: aaronjjacobs@gmail.com (Aaron Jacobs)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package oglemock
import (
"errors"
"fmt"
"reflect"
)
// Create an Action that invokes the supplied function, returning whatever it
// returns. The signature of the function must match that of the mocked method
// exactly.
func Invoke(f interface{}) Action {
// Make sure f is a function.
fv := reflect.ValueOf(f)
fk := fv.Kind()
if fk != reflect.Func {
desc := "<nil>"
if fk != reflect.Invalid {
desc = fv.Type().String()
}
panic(fmt.Sprintf("Invoke: expected function, got %s", desc))
}
return &invokeAction{fv}
}
type invokeAction struct {
f reflect.Value
}
func (a *invokeAction) SetSignature(signature reflect.Type) error {
// The signature must match exactly.
ft := a.f.Type()
if ft != signature {
return errors.New(fmt.Sprintf("Invoke: expected %v, got %v", signature, ft))
}
return nil
}
func (a *invokeAction) Invoke(vals []interface{}) []interface{} {
// Create a slice of args for the function.
in := make([]reflect.Value, len(vals))
for i, x := range vals {
in[i] = reflect.ValueOf(x)
}
// Call the function and return its return values.
out := a.f.Call(in)
result := make([]interface{}, len(out))
for i, v := range out {
result[i] = v.Interface()
}
return result
}
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