Adds goBack assert to catch negative counts (#41)

Thanks to @Kondamon!
johnpatrickmorgan · Jul 26, 2022 · 5777d76 · 5777d76
1 parent 7c01206
commit 5777d76
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/Sources/FlowStacks/RoutableCollection+utilities.swift b/Sources/FlowStacks/RoutableCollection+utilities.swift
@@ -66,7 +66,11 @@ public extension RoutableCollection where Element: RouteProtocol {
       self.count - count >= 0,
       "Can't go back\(count == 1 ? "" : " \(count) screens") - the screen count is \(self.count)"
     )
-    guard self.count - count >= 0 else { return }
+    assert(
+      count >= 0,
+      "Can't go back \(count) screens - count must be positive"
+    )
+    guard self.count - count >= 0, count >= 0 else { return }
     removeLast(count)
   }