github.com/onsi/gomega@v1.32.0/matchers/have_len_matcher.go (about)

     1  package matchers
     2  
     3  import (
     4  	"fmt"
     5  
     6  	"github.com/onsi/gomega/format"
     7  )
     8  
     9  type HaveLenMatcher struct {
    10  	Count int
    11  }
    12  
    13  func (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  
    22  func (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  
    26  func (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  }