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// untested sections: 3
package matchers
import (
"fmt"
"reflect"
"github.com/onsi/gomega/format"
"github.com/onsi/gomega/matchers/support/goraph/bipartitegraph"
)
type ConsistOfMatcher struct {
Elements []interface{}
missingElements []interface{}
extraElements []interface{}
}
func (matcher *ConsistOfMatcher) Match(actual interface{}) (success bool, err error) {
if !isArrayOrSlice(actual) && !isMap(actual) {
return false, fmt.Errorf("ConsistOf matcher expects an array/slice/map. Got:\n%s", format.Object(actual, 1))
}
matchers := matchers(matcher.Elements)
values := valuesOf(actual)
bipartiteGraph, err := bipartitegraph.NewBipartiteGraph(values, matchers, neighbours)
if err != nil {
return false, err
}
edges := bipartiteGraph.LargestMatching()
if len(edges) == len(values) && len(edges) == len(matchers) {
return true, nil
}
var missingMatchers []interface{}
matcher.extraElements, missingMatchers = bipartiteGraph.FreeLeftRight(edges)
matcher.missingElements = equalMatchersToElements(missingMatchers)
return false, nil
}
func neighbours(value, matcher interface{}) (bool, error) {
match, err := matcher.(omegaMatcher).Match(value)
return match && err == nil, nil
}
func equalMatchersToElements(matchers []interface{}) (elements []interface{}) {
for _, matcher := range matchers {
equalMatcher, ok := matcher.(*EqualMatcher)
if ok {
matcher = equalMatcher.Expected
}
elements = append(elements, matcher)
}
return
}
func matchers(expectedElems []interface{}) (matchers []interface{}) {
elems := expectedElems
if len(expectedElems) == 1 && isArrayOrSlice(expectedElems[0]) {
elems = []interface{}{}
value := reflect.ValueOf(expectedElems[0])
for i := 0; i < value.Len(); i++ {
elems = append(elems, value.Index(i).Interface())
}
}
for _, e := range elems {
matcher, isMatcher := e.(omegaMatcher)
if !isMatcher {
matcher = &EqualMatcher{Expected: e}
}
matchers = append(matchers, matcher)
}
return
}
func valuesOf(actual interface{}) []interface{} {
value := reflect.ValueOf(actual)
values := []interface{}{}
if isMap(actual) {
keys := value.MapKeys()
for i := 0; i < value.Len(); i++ {
values = append(values, value.MapIndex(keys[i]).Interface())
}
} else {
for i := 0; i < value.Len(); i++ {
values = append(values, value.Index(i).Interface())
}
}
return values
}
func (matcher *ConsistOfMatcher) FailureMessage(actual interface{}) (message string) {
message = format.Message(actual, "to consist of", matcher.Elements)
message = appendMissingElements(message, matcher.missingElements)
if len(matcher.extraElements) > 0 {
message = fmt.Sprintf("%s\nthe extra elements were\n%s", message,
format.Object(matcher.extraElements, 1))
}
return
}
func appendMissingElements(message string, missingElements []interface{}) string {
if len(missingElements) == 0 {
return message
}
return fmt.Sprintf("%s\nthe missing elements were\n%s", message,
format.Object(missingElements, 1))
}
func (matcher *ConsistOfMatcher) NegatedFailureMessage(actual interface{}) (message string) {
return format.Message(actual, "not to consist of", matcher.Elements)
}
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