test(ordered-list): add unit tests

tests/OrderedList/OrderedList.test.svelte

@@ -0,0 +1,36 @@
+<svelte:options accessors />
+
+<script lang="ts">
+  import { OrderedList, ListItem } from "carbon-components-svelte";
+
+  export let nested = false;
+  export let native = false;
+  export let expressive = false;
+  export let items: string[] = ["Item 1", "Item 2", "Item 3"];
+  export let nestedItems: string[] = [];
+</script>
+
+<div data-testid="list-wrapper">
+  <OrderedList
+    {nested}
+    {native}
+    {expressive}
+    on:click
+    on:mouseover
+    on:mouseenter
+    on:mouseleave
+  >
+    {#each items as item}
+      <ListItem>
+        {item}
+        {#if nested && nestedItems.length > 0}
+          <OrderedList nested>
+            {#each nestedItems as nestedItem}
+              <ListItem>{nestedItem}</ListItem>
+            {/each}
+          </OrderedList>
+        {/if}
+      </ListItem>
+    {/each}
+  </OrderedList>
+</div>