release: WRNexusJS 0.8.0

packages/cli/test/contracts.test.ts

@@ -0,0 +1,59 @@
+import { afterEach, describe, expect, test } from "bun:test";
+import { mkdir, rm, writeFile } from "node:fs/promises";
+import { join } from "node:path";
+import { tmpdir } from "node:os";
+import { runContractsCommand } from "../src/contracts-command.ts";
+
+const roots: string[] = [];
+afterEach(async () =>
+  Promise.all(roots.splice(0).map((root) => rm(root, { recursive: true, force: true }))),
+);
+
+async function fixture(): Promise<string> {
+  const root = join(tmpdir(), `wrnexus-contracts-${crypto.randomUUID()}`);
+  roots.push(root);
+  await mkdir(root, { recursive: true });
+  await writeFile(
+    join(root, "wrnexus.contracts.json"),
+    JSON.stringify({
+      format: 1,
+      contracts: [
+        {
+          kind: "queue",
+          name: "mail",
+          version: 1,
+          consumers: ["worker"],
+          payload: {
+            type: "object",
+            fields: { to: { type: "string", rules: [] } },
+          },
+        },
+      ],
+    }),
+  );
+  return root;
+}
+
+describe("contracts command", () => {
+  test("snapshots and checks compatible contracts", async () => {
+    const root = await fixture();
+    expect((await runContractsCommand(root, "snapshot")).ok).toBe(true);
+    expect((await runContractsCommand(root, "check")).ok).toBe(true);
+  });
+
+  test("returns a failed result for breaking changes", async () => {
+    const root = await fixture();
+    await runContractsCommand(root, "snapshot");
+    await writeFile(
+      join(root, "wrnexus.contracts.json"),
+      JSON.stringify({ format: 1, contracts: [] }),
+    );
+    const result = await runContractsCommand(root, "check");
+    expect(result).toMatchObject({ ok: false, issueCount: 1 });
+  });
+
+  test("requires an explicit baseline", async () => {
+    const root = await fixture();
+    await expect(runContractsCommand(root, "check")).rejects.toThrow("WRN-CONTRACT-BASELINE");
+  });
+});