test: expand runtime guard and path prepend coverage

src/infra/runtime-guard.test.ts

@@ -4,6 +4,7 @@ import {
   detectRuntime,
   isAtLeast,
   parseSemver,
+  isSupportedNodeVersion,
   type RuntimeDetails,
   runtimeSatisfies,
 } from "./runtime-guard.js";
@@ -12,6 +13,7 @@ describe("runtime-guard", () => {
   it("parses semver with or without leading v", () => {
     expect(parseSemver("v22.1.3")).toEqual({ major: 22, minor: 1, patch: 3 });
     expect(parseSemver("1.3.0")).toEqual({ major: 1, minor: 3, patch: 0 });
+    expect(parseSemver("22.16.0-beta.1")).toEqual({ major: 22, minor: 16, patch: 0 });
     expect(parseSemver("invalid")).toBeNull();
   });
 
@@ -49,6 +51,9 @@ describe("runtime-guard", () => {
     expect(runtimeSatisfies(nodeOld)).toBe(false);
     expect(runtimeSatisfies(nodeTooOld)).toBe(false);
     expect(runtimeSatisfies(unknown)).toBe(false);
+    expect(isSupportedNodeVersion("22.16.0")).toBe(true);
+    expect(isSupportedNodeVersion("22.15.9")).toBe(false);
+    expect(isSupportedNodeVersion(null)).toBe(false);
   });
 
   it("throws via exit when runtime is too old", () => {
@@ -67,6 +72,7 @@ describe("runtime-guard", () => {
     };
     expect(() => assertSupportedRuntime(runtime, details)).toThrow("exit");
     expect(runtime.error).toHaveBeenCalledWith(expect.stringContaining("requires Node"));
+    expect(runtime.error).toHaveBeenCalledWith(expect.stringContaining("Detected: node 20.0.0"));
   });
 
   it("returns silently when runtime meets requirements", () => {
@@ -84,4 +90,25 @@ describe("runtime-guard", () => {
     expect(() => assertSupportedRuntime(runtime, details)).not.toThrow();
     expect(runtime.exit).not.toHaveBeenCalled();
   });
+
+  it("reports unknown runtimes with fallback labels", () => {
+    const runtime = {
+      log: vi.fn(),
+      error: vi.fn(),
+      exit: vi.fn(() => {
+        throw new Error("exit");
+      }),
+    };
+    const details: RuntimeDetails = {
+      kind: "unknown",
+      version: null,
+      execPath: null,
+      pathEnv: "(not set)",
+    };
+
+    expect(() => assertSupportedRuntime(runtime, details)).toThrow("exit");
+    expect(runtime.error).toHaveBeenCalledWith(
+      expect.stringContaining("Detected: unknown runtime (exec: unknown)."),
+    );
+  });
 });