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test/parallel/test-webstreams-clone-unref.js

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+'use strict';
+
+require('../common');
+const { ok } = require('node:assert');
+
+// This test verifies that cloned ReadableStream and WritableStream instances
+// do not keep the process alive. The test fails if it timesout (it should just
+// exit immediately)
+
+const rs1 = new ReadableStream();
+const ws1 = new WritableStream();
+
+const [rs2, ws2] = structuredClone([rs1, ws1], { transfer: [rs1, ws1] });
+
+ok(rs2 instanceof ReadableStream);
+ok(ws2 instanceof WritableStream);