test: tighten runtime status and usage formatting coverage

src/infra/runtime-status.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, it } from "vitest";
+import { formatRuntimeStatusWithDetails } from "./runtime-status.js";
+
+describe("formatRuntimeStatusWithDetails", () => {
+  it("falls back to unknown when status is missing", () => {
+    expect(formatRuntimeStatusWithDetails({})).toBe("unknown");
+  });
+
+  it("includes pid, distinct state, and non-empty details", () => {
+    expect(
+      formatRuntimeStatusWithDetails({
+        status: "running",
+        pid: 1234,
+        state: "sleeping",
+        details: ["healthy", "", "port 18789"],
+      }),
+    ).toBe("running (pid 1234, state sleeping, healthy, port 18789)");
+  });
+
+  it("omits duplicate state text and falsy pid values", () => {
+    expect(
+      formatRuntimeStatusWithDetails({
+        status: "running",
+        pid: 0,
+        state: "RUNNING",
+        details: [],
+      }),
+    ).toBe("running");
+  });
+});