mirror of
https://github.com/go-gitea/gitea
synced 2025-10-31 03:18:24 +00:00
135 lines
3.4 KiB
Go
135 lines
3.4 KiB
Go
// 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 oglematchers
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"reflect"
|
|
)
|
|
|
|
// Is the type comparable according to the definition here?
|
|
//
|
|
// http://weekly.golang.org/doc/go_spec.html#Comparison_operators
|
|
//
|
|
func isComparable(t reflect.Type) bool {
|
|
switch t.Kind() {
|
|
case reflect.Array:
|
|
return isComparable(t.Elem())
|
|
|
|
case reflect.Struct:
|
|
for i := 0; i < t.NumField(); i++ {
|
|
if !isComparable(t.Field(i).Type) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
return true
|
|
|
|
case reflect.Slice, reflect.Map, reflect.Func:
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
// Should the supplied type be allowed as an argument to IdenticalTo?
|
|
func isLegalForIdenticalTo(t reflect.Type) (bool, error) {
|
|
// Allow the zero type.
|
|
if t == nil {
|
|
return true, nil
|
|
}
|
|
|
|
// Reference types are always okay; we compare pointers.
|
|
switch t.Kind() {
|
|
case reflect.Slice, reflect.Map, reflect.Func, reflect.Chan:
|
|
return true, nil
|
|
}
|
|
|
|
// Reject other non-comparable types.
|
|
if !isComparable(t) {
|
|
return false, errors.New(fmt.Sprintf("%v is not comparable", t))
|
|
}
|
|
|
|
return true, nil
|
|
}
|
|
|
|
// IdenticalTo(x) returns a matcher that matches values v with type identical
|
|
// to x such that:
|
|
//
|
|
// 1. If v and x are of a reference type (slice, map, function, channel), then
|
|
// they are either both nil or are references to the same object.
|
|
//
|
|
// 2. Otherwise, if v and x are not of a reference type but have a valid type,
|
|
// then v == x.
|
|
//
|
|
// If v and x are both the invalid type (which results from the predeclared nil
|
|
// value, or from nil interface variables), then the matcher is satisfied.
|
|
//
|
|
// This function will panic if x is of a value type that is not comparable. For
|
|
// example, x cannot be an array of functions.
|
|
func IdenticalTo(x interface{}) Matcher {
|
|
t := reflect.TypeOf(x)
|
|
|
|
// Reject illegal arguments.
|
|
if ok, err := isLegalForIdenticalTo(t); !ok {
|
|
panic("IdenticalTo: " + err.Error())
|
|
}
|
|
|
|
return &identicalToMatcher{x}
|
|
}
|
|
|
|
type identicalToMatcher struct {
|
|
x interface{}
|
|
}
|
|
|
|
func (m *identicalToMatcher) Description() string {
|
|
t := reflect.TypeOf(m.x)
|
|
return fmt.Sprintf("identical to <%v> %v", t, m.x)
|
|
}
|
|
|
|
func (m *identicalToMatcher) Matches(c interface{}) error {
|
|
// Make sure the candidate's type is correct.
|
|
t := reflect.TypeOf(m.x)
|
|
if ct := reflect.TypeOf(c); t != ct {
|
|
return NewFatalError(fmt.Sprintf("which is of type %v", ct))
|
|
}
|
|
|
|
// Special case: two values of the invalid type are always identical.
|
|
if t == nil {
|
|
return nil
|
|
}
|
|
|
|
// Handle reference types.
|
|
switch t.Kind() {
|
|
case reflect.Slice, reflect.Map, reflect.Func, reflect.Chan:
|
|
xv := reflect.ValueOf(m.x)
|
|
cv := reflect.ValueOf(c)
|
|
if xv.Pointer() == cv.Pointer() {
|
|
return nil
|
|
}
|
|
|
|
return errors.New("which is not an identical reference")
|
|
}
|
|
|
|
// Are the values equal?
|
|
if m.x == c {
|
|
return nil
|
|
}
|
|
|
|
return errors.New("")
|
|
}
|