diff options
Diffstat (limited to 'vendor/github.com/onsi/gomega/matchers/have_field.go')
-rw-r--r-- | vendor/github.com/onsi/gomega/matchers/have_field.go | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/vendor/github.com/onsi/gomega/matchers/have_field.go b/vendor/github.com/onsi/gomega/matchers/have_field.go new file mode 100644 index 000000000..e1fe934d5 --- /dev/null +++ b/vendor/github.com/onsi/gomega/matchers/have_field.go @@ -0,0 +1,87 @@ +package matchers + +import ( + "fmt" + "reflect" + "strings" + + "github.com/onsi/gomega/format" +) + +func extractField(actual interface{}, field string) (interface{}, error) { + fields := strings.SplitN(field, ".", 2) + actualValue := reflect.ValueOf(actual) + + if actualValue.Kind() == reflect.Ptr { + actualValue = actualValue.Elem() + } + if actualValue == (reflect.Value{}) { + return nil, fmt.Errorf("HaveField encountered nil while dereferencing a pointer of type %T.", actual) + } + + if actualValue.Kind() != reflect.Struct { + return nil, fmt.Errorf("HaveField encountered:\n%s\nWhich is not a struct.", format.Object(actual, 1)) + } + + var extractedValue reflect.Value + + if strings.HasSuffix(fields[0], "()") { + extractedValue = actualValue.MethodByName(strings.TrimSuffix(fields[0], "()")) + if extractedValue == (reflect.Value{}) { + return nil, fmt.Errorf("HaveField could not find method named '%s' in struct of type %T.", fields[0], actual) + } + t := extractedValue.Type() + if t.NumIn() != 0 || t.NumOut() != 1 { + return nil, fmt.Errorf("HaveField found an invalid method named '%s' in struct of type %T.\nMethods must take no arguments and return exactly one value.", fields[0], actual) + } + extractedValue = extractedValue.Call([]reflect.Value{})[0] + } else { + extractedValue = actualValue.FieldByName(fields[0]) + if extractedValue == (reflect.Value{}) { + return nil, fmt.Errorf("HaveField could not find field named '%s' in struct:\n%s", fields[0], format.Object(actual, 1)) + } + } + + if len(fields) == 1 { + return extractedValue.Interface(), nil + } else { + return extractField(extractedValue.Interface(), fields[1]) + } +} + +type HaveFieldMatcher struct { + Field string + Expected interface{} + + extractedField interface{} + expectedMatcher omegaMatcher +} + +func (matcher *HaveFieldMatcher) Match(actual interface{}) (success bool, err error) { + matcher.extractedField, err = extractField(actual, matcher.Field) + if err != nil { + return false, err + } + + var isMatcher bool + matcher.expectedMatcher, isMatcher = matcher.Expected.(omegaMatcher) + if !isMatcher { + matcher.expectedMatcher = &EqualMatcher{Expected: matcher.Expected} + } + + return matcher.expectedMatcher.Match(matcher.extractedField) +} + +func (matcher *HaveFieldMatcher) FailureMessage(actual interface{}) (message string) { + message = fmt.Sprintf("Value for field '%s' failed to satisfy matcher.\n", matcher.Field) + message += matcher.expectedMatcher.FailureMessage(matcher.extractedField) + + return message +} + +func (matcher *HaveFieldMatcher) NegatedFailureMessage(actual interface{}) (message string) { + message = fmt.Sprintf("Value for field '%s' satisfied matcher, but should not have.\n", matcher.Field) + message += matcher.expectedMatcher.NegatedFailureMessage(matcher.extractedField) + + return message +} |