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

     1  package matchers
     2  
     3  import (
     4  	"bytes"
     5  	"fmt"
     6  	"reflect"
     7  
     8  	"github.com/onsi/gomega/format"
     9  )
    10  
    11  type EqualMatcher struct {
    12  	Expected interface{}
    13  }
    14  
    15  func (matcher *EqualMatcher) Match(actual interface{}) (success bool, err error) {
    16  	if actual == nil && matcher.Expected == nil {
    17  		return false, fmt.Errorf("Refusing to compare <nil> to <nil>.\nBe explicit and use BeNil() instead.  This is to avoid mistakes where both sides of an assertion are erroneously uninitialized.")
    18  	}
    19  	// Shortcut for byte slices.
    20  	// Comparing long byte slices with reflect.DeepEqual is very slow,
    21  	// so use bytes.Equal if actual and expected are both byte slices.
    22  	if actualByteSlice, ok := actual.([]byte); ok {
    23  		if expectedByteSlice, ok := matcher.Expected.([]byte); ok {
    24  			return bytes.Equal(actualByteSlice, expectedByteSlice), nil
    25  		}
    26  	}
    27  	return reflect.DeepEqual(actual, matcher.Expected), nil
    28  }
    29  
    30  func (matcher *EqualMatcher) FailureMessage(actual interface{}) (message string) {
    31  	actualString, actualOK := actual.(string)
    32  	expectedString, expectedOK := matcher.Expected.(string)
    33  	if actualOK && expectedOK {
    34  		return format.MessageWithDiff(actualString, "to equal", expectedString)
    35  	}
    36  
    37  	return format.Message(actual, "to equal", matcher.Expected)
    38  }
    39  
    40  func (matcher *EqualMatcher) NegatedFailureMessage(actual interface{}) (message string) {
    41  	return format.Message(actual, "not to equal", matcher.Expected)
    42  }