95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
|
// Copyright 2011 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"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
// AnyOf accepts a set of values S and returns a matcher that follows the
|
||
|
|
// algorithm below when considering a candidate c:
|
||
|
|
//
|
||
|
|
// 1. If there exists a value m in S such that m implements the Matcher
|
||
|
|
// interface and m matches c, return true.
|
||
|
|
//
|
||
|
|
// 2. Otherwise, if there exists a value v in S such that v does not implement
|
||
|
|
// the Matcher interface and the matcher Equals(v) matches c, return true.
|
||
|
|
//
|
||
|
|
// 3. Otherwise, if there is a value m in S such that m implements the Matcher
|
||
|
|
// interface and m returns a fatal error for c, return that fatal error.
|
||
|
|
//
|
||
|
|
// 4. Otherwise, return false.
|
||
|
|
//
|
||
|
|
// This is akin to a logical OR operation for matchers, with non-matchers x
|
||
|
|
// being treated as Equals(x).
|
||
|
|
func AnyOf(vals ...interface{}) Matcher {
|
||
|
|
// Get ahold of a type variable for the Matcher interface.
|
||
|
|
var dummy *Matcher
|
||
|
|
matcherType := reflect.TypeOf(dummy).Elem()
|
||
|
|
|
||
|
|
// Create a matcher for each value, or use the value itself if it's already a
|
||
|
|
// matcher.
|
||
|
|
wrapped := make([]Matcher, len(vals))
|
||
|
|
for i, v := range vals {
|
||
|
|
t := reflect.TypeOf(v)
|
||
|
|
if t != nil && t.Implements(matcherType) {
|
||
|
|
wrapped[i] = v.(Matcher)
|
||
|
|
} else {
|
||
|
|
wrapped[i] = Equals(v)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return &anyOfMatcher{wrapped}
|
||
|
|
}
|
||
|
|
|
||
|
|
type anyOfMatcher struct {
|
||
|
|
wrapped []Matcher
|
||
|
|
}
|
||
|
|
|
||
|
|
func (m *anyOfMatcher) Description() string {
|
||
|
|
wrappedDescs := make([]string, len(m.wrapped))
|
||
|
|
for i, matcher := range m.wrapped {
|
||
|
|
wrappedDescs[i] = matcher.Description()
|
||
|
|
}
|
||
|
|
|
||
|
|
return fmt.Sprintf("or(%s)", strings.Join(wrappedDescs, ", "))
|
||
|
|
}
|
||
|
|
|
||
|
|
func (m *anyOfMatcher) Matches(c interface{}) (err error) {
|
||
|
|
err = errors.New("")
|
||
|
|
|
||
|
|
// Try each matcher in turn.
|
||
|
|
for _, matcher := range m.wrapped {
|
||
|
|
wrappedErr := matcher.Matches(c)
|
||
|
|
|
||
|
|
// Return immediately if there's a match.
|
||
|
|
if wrappedErr == nil {
|
||
|
|
err = nil
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// Note the fatal error, if any.
|
||
|
|
if _, isFatal := wrappedErr.(*FatalError); isFatal {
|
||
|
|
err = wrappedErr
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return
|
||
|
|
}
|