1package matchers
 2
 3import (
 4	"fmt"
 5
 6	"github.com/onsi/gomega/format"
 7)
 8
 9type HaveLenMatcher struct {
10	Count int
11}
12
13func (matcher *HaveLenMatcher) Match(actual interface{}) (success bool, err error) {
14	length, ok := lengthOf(actual)
15	if !ok {
16		return false, fmt.Errorf("HaveLen matcher expects a string/array/map/channel/slice.  Got:\n%s", format.Object(actual, 1))
17	}
18
19	return length == matcher.Count, nil
20}
21
22func (matcher *HaveLenMatcher) FailureMessage(actual interface{}) (message string) {
23	return fmt.Sprintf("Expected\n%s\nto have length %d", format.Object(actual, 1), matcher.Count)
24}
25
26func (matcher *HaveLenMatcher) NegatedFailureMessage(actual interface{}) (message string) {
27	return fmt.Sprintf("Expected\n%s\nnot to have length %d", format.Object(actual, 1), matcher.Count)
28}