func TestAPIErrCodeDefinition(t *testing.T) {
	for errAPI := ErrNone + 1; errAPI < apiErrCodeEnd; errAPI++ {
		errCode, ok := errorCodes[errAPI]
		if !ok {
			t.Fatal(errAPI, "error code is not defined in the API error code table")
		}
		if errCode.Code == "" {
			t.Fatal(errAPI, "error code has an empty XML code")
		}
		if errCode.HTTPStatusCode == 0 {
			t.Fatal(errAPI, "error code has a zero HTTP status code")
		}
	}

			result.combine(e.Trim.TrimChars.analyze(s))
		}
		if e.Trim.TrimFrom != nil {
			result.combine(e.Trim.TrimFrom.analyze(s))
		}
		return result

	case sqlFnSubstring:
		errVal := fmt.Errorf("Invalid argument(s) to %s", string(funcName))
		result.combine(e.Substring.Expr.analyze(s))
		switch {
		case e.Substring.From != nil:
			result.combine(e.Substring.From.analyze(s))