Add zmachine unit tests

packages/grid_client/tests/modules/zmachine.test.ts

@@ -0,0 +1,64 @@
+import { ComputeCapacity, Mount, Zmachine, ZmachineNetwork } from "../../src";
+
+const zmachine = new Zmachine();
+
+beforeAll(() => {
+  const computeCapacity = new ComputeCapacity();
+  computeCapacity.cpu = 1;
+  computeCapacity.memory = 5;
+
+  const network = new ZmachineNetwork();
+  network.planetary = true;
+  network.public_ip = "10.249.0.0/16";
+  network.interfaces = [
+    {
+      network: "znetwork",
+      ip: "10.20.2.2",
+    },
+  ];
+
+  const rootfs_size = 2;
+
+  const disks = new Mount();
+  disks.name = "zdisk";
+  disks.mountpoint = "/mnt/data";
+
+  zmachine.flist = "https://hub.grid.tf/tf-official-vms/ubuntu-22.04.flist";
+  zmachine.network = network;
+  zmachine.size = rootfs_size * 1024 ** 3;
+  zmachine.mounts = [disks];
+  zmachine.entrypoint = "/sbin/zinit init";
+  zmachine.compute_capacity = computeCapacity;
+  zmachine.env = {};
+  zmachine.corex = false;
+  zmachine.gpu = [];
+});
+
+describe("Zmachine Class Tests", () => {
+  it("should create a valid Zmachine instance", () => {
+    expect(zmachine).toBeInstanceOf(Zmachine);
+  });
+
+  it("should correctly compute the challenge string", () => {
+    const expectedChallenge =
+      "https://hub.grid.tf/tf-official-vms/ubuntu-22.04.flist" +
+      "10.249.0.0/16" +
+      "true" +
+      "znetwork" +
+      "10.20.2.22" +
+      "14748364815" +
+      "zdisk" +
+      "/mnt/data" +
+      "/sbin/zinit init";
+
+    expect(zmachine.challenge()).toBe(expectedChallenge);
+  });
+
+  it("should fail validation for missing required fields", () => {
+    const result = () => {
+      zmachine.flist = "";
+      zmachine.entrypoint = "";
+    };
+    expect(result).toThrow();
+  });
+});