add test

packages/svelte/tests/runtime-runes/samples/inspect-trace-circular-reference/_config.js

@@ -0,0 +1,22 @@
+import { test } from '../../test';
+import { normalise_trace_logs } from '../../../helpers.js';
+
+export default test({
+    compileOptions: {
+        dev: true
+    },
+
+    test({ assert, logs }) {
+        assert.deepEqual(normalise_trace_logs(logs), [
+            { log: '$state', highlighted: true },
+            { log: 'filesState.files', highlighted: false },
+            { log: { id: 1, items: [{ id: 2, items: [{ id: 3 }, { id: 4 }] }] } },
+            { log: '$state', highlighted: true },
+            { log: 'filesState.files.items[0].parent', highlighted: false },
+            { log: { id: 1, items: [{ id: 2, items: [{ id: 3 }, { id: 4 }] }] } },
+            { log: '$state', highlighted: true },
+            { log: 'filesState.files.items[0].parent.items[0]', highlighted: false },
+            { log: { id: 2, items: [{ id: 3 }, { id: 4 }] } }
+        ]);
+    }
+});

packages/svelte/tests/runtime-runes/samples/inspect-trace-circular-reference/main.svelte

@@ -0,0 +1,12 @@
+<script>
+    const filesState = $state({ files: {} });
+    let nodes = { id: 1, items: [{ id: 2, items: [{ id: 3 }, { id: 4 }] }] };
+    filesState.files = nodes;
+    function test() {
+        $inspect.trace();
+        console.log('before assignment');
+        filesState.files.items[0].parent = filesState.files;
+        console.log('after assignment');
+    }
+    $effect(test);
+</script>