From 54c6452a40c845a0f0d372342240438ed69fc42f Mon Sep 17 00:00:00 2001
From: sg3-141-592 <5122866+sg3-141-592@users.noreply.github.com>
Date: Fri, 20 Sep 2024 07:47:09 +0100
Subject: [PATCH] Fix for potential negative step in cron

---
 gronx_test.go | 3 +++
 validator.go  | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/gronx_test.go b/gronx_test.go
index 80a3ce6..5464b9d 100644
--- a/gronx_test.go
+++ b/gronx_test.go
@@ -91,6 +91,9 @@ func TestIsValid(t *testing.T) {
 		if gron.IsValid("* * * *") {
 			t.Errorf("expected false, got true")
 		}
+		if gron.IsValid("0-0/-005 * * * *") {
+			t.Errorf("expected true, got false")
+		}
 	})
 
 }
diff --git a/validator.go b/validator.go
index 62c3a36..d7441d4 100644
--- a/validator.go
+++ b/validator.go
@@ -14,7 +14,7 @@ func inStep(val int, s string, bounds []int) (bool, error) {
 	if err != nil {
 		return false, err
 	}
-	if step == 0 {
+	if step <= 0 {
 		return false, errors.New("step can't be 0")
 	}