have_each_matcher.go

Documentation: github.com/onsi/gomega/matchers

     1  package matchers
     2  
     3  import (
     4  	"fmt"
     5  	"reflect"
     6  
     7  	"github.com/onsi/gomega/format"
     8  )
     9  
    10  type HaveEachMatcher struct {
    11  	Element interface{}
    12  }
    13  
    14  func (matcher *HaveEachMatcher) Match(actual interface{}) (success bool, err error) {
    15  	if !isArrayOrSlice(actual) && !isMap(actual) {
    16  		return false, fmt.Errorf("HaveEach matcher expects an array/slice/map.  Got:\n%s",
    17  			format.Object(actual, 1))
    18  	}
    19  
    20  	elemMatcher, elementIsMatcher := matcher.Element.(omegaMatcher)
    21  	if !elementIsMatcher {
    22  		elemMatcher = &EqualMatcher{Expected: matcher.Element}
    23  	}
    24  
    25  	value := reflect.ValueOf(actual)
    26  	if value.Len() == 0 {
    27  		return false, fmt.Errorf("HaveEach matcher expects a non-empty array/slice/map.  Got:\n%s",
    28  			format.Object(actual, 1))
    29  	}
    30  
    31  	var valueAt func(int) interface{}
    32  	if isMap(actual) {
    33  		keys := value.MapKeys()
    34  		valueAt = func(i int) interface{} {
    35  			return value.MapIndex(keys[i]).Interface()
    36  		}
    37  	} else {
    38  		valueAt = func(i int) interface{} {
    39  			return value.Index(i).Interface()
    40  		}
    41  	}
    42  
    43  	// if there are no elements, then HaveEach will match.
    44  	for i := 0; i < value.Len(); i++ {
    45  		success, err := elemMatcher.Match(valueAt(i))
    46  		if err != nil {
    47  			return false, err
    48  		}
    49  		if !success {
    50  			return false, nil
    51  		}
    52  	}
    53  
    54  	return true, nil
    55  }
    56  
    57  // FailureMessage returns a suitable failure message.
    58  func (matcher *HaveEachMatcher) FailureMessage(actual interface{}) (message string) {
    59  	return format.Message(actual, "to contain element matching", matcher.Element)
    60  }
    61  
    62  // NegatedFailureMessage returns a suitable negated failure message.
    63  func (matcher *HaveEachMatcher) NegatedFailureMessage(actual interface{}) (message string) {
    64  	return format.Message(actual, "not to contain element matching", matcher.Element)
    65  }
    66
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