Bug fix: HTTP Default mapping does not include mapping for 503 (#16)

Co-authored-by: Calvin Lobo <[email protected]>

Author: lobocv

ecosystem/http/translate_error_code.go

@@ -32,6 +32,7 @@ func DefaultMapping() map[simplerr.Code]HTTPStatus {
 		simplerr.CodeNotImplemented:    http.StatusNotImplemented,
 		simplerr.CodeMalformedRequest:  http.StatusBadRequest,
 		simplerr.CodeInvalidArgument:   http.StatusUnprocessableEntity,
+		simplerr.CodeUnavailable:       http.StatusServiceUnavailable,
 		simplerr.CodeMissingParameter:  http.StatusUnprocessableEntity,
 		simplerr.CodeResourceExhausted: http.StatusTooManyRequests,
 	}

ecosystem/http/translate_error_code_test.go

@@ -39,6 +39,7 @@ func (s *TestSuite) TestTranslateErrorCode() {
 		{fmt.Errorf("something"), http.StatusInternalServerError, false},
 		{simplerr.New("something").Code(simplerr.CodeUnknown), http.StatusInternalServerError, false},
 		{simplerr.New("something").Code(simplerr.CodePermissionDenied), http.StatusForbidden, true},
+		{simplerr.New("something").Code(simplerr.CodeUnavailable), http.StatusServiceUnavailable, true},
 		{simplerr.New("something").Code(simplerr.CodeCanceled), http.StatusRequestTimeout, true},
 		{simplerr.New("something").Code(simplerr.CodeConstraintViolated), http.StatusInternalServerError, false},
 		{simplerr.New("something").Code(simplerr.CodeMalformedRequest), http.StatusBadRequest, true},