[Updt] Mtp 0.3.0

packages/mtp/src/requestIds.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it } from "vitest";
+
+import { RequestIdAllocator } from "./requestIds";
+
+describe("MTP request ID allocation", () => {
+  it("allocates nonzero request IDs monotonically", () => {
+    const ids = new RequestIdAllocator();
+
+    expect(ids.allocate()).toBe(1);
+    expect(ids.allocate()).toBe(2);
+    expect(new RequestIdAllocator().allocate()).toBe(1);
+  });
+
+  it("does not wrap exhausted request IDs", () => {
+    const ids = new RequestIdAllocator(0x1_0000_0000);
+
+    expect(() => ids.allocate()).toThrow("MTP request ID space exhausted");
+  });
+
+  it("rejects invalid allocator states", () => {
+    expect(() => new RequestIdAllocator(0)).toThrow(
+      "invalid MTP request ID allocator state",
+    );
+  });
+});