chore: import upstream snapshot with attribution

tests/unit/executor-deepseek-web-auto-refresh.test.ts

@@ -0,0 +1,43 @@
+import { describe, it } from "node:test";
+import assert from "node:assert/strict";
+
+const mod = await import("../../open-sse/executors/deepseek-web-with-auto-refresh.ts");
+
+describe("DeepSeekWebWithAutoRefreshExecutor", () => {
+  it("can be instantiated with default config", () => {
+    const executor = new mod.DeepSeekWebWithAutoRefreshExecutor();
+    assert.ok(executor);
+  });
+
+  it("can be instantiated with custom config", () => {
+    const executor = new mod.DeepSeekWebWithAutoRefreshExecutor({
+      sessionRefreshInterval: 30 * 60 * 1000,
+      maxRefreshRetries: 5,
+      autoRefresh: false,
+    });
+    assert.ok(executor);
+  });
+
+  it("isSessionValid returns false initially", () => {
+    const executor = new mod.DeepSeekWebWithAutoRefreshExecutor();
+    assert.equal(executor.isSessionValid(), false);
+  });
+
+  it("getTimeSinceRefresh returns a number", () => {
+    const executor = new mod.DeepSeekWebWithAutoRefreshExecutor();
+    const elapsed = executor.getTimeSinceRefresh();
+    assert.ok(typeof elapsed === "number");
+    assert.ok(elapsed >= 0);
+  });
+
+  it("destroy does not throw", () => {
+    const executor = new mod.DeepSeekWebWithAutoRefreshExecutor();
+    executor.destroy(); // should not throw
+    assert.ok(true);
+  });
+
+  it("exports singleton instance", () => {
+    assert.ok(mod.deepseekWebWithAutoRefreshExecutor);
+    assert.ok(mod.deepseekWebWithAutoRefreshExecutor instanceof mod.DeepSeekWebWithAutoRefreshExecutor);
+  });
+});