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Made-with: Cursor

openclaw/test/helpers/node-builtin-mocks.test.ts

@@ -0,0 +1,54 @@
+import { describe, expect, it } from "vitest";
+import { mockNodeBuiltinModule } from "./node-builtin-mocks.js";
+
+describe("mockNodeBuiltinModule", () => {
+  it("merges partial overrides into the original module", async () => {
+    const actual = { readFileSync: () => "actual", watch: () => "watch" };
+    const readFileSync = () => "mock";
+
+    const mocked = await mockNodeBuiltinModule(async () => actual, {
+      readFileSync,
+    });
+
+    expect(mocked.readFileSync).toBe(readFileSync);
+    expect(mocked.watch).toBe(actual.watch);
+    expect("default" in mocked).toBe(false);
+  });
+
+  it("mirrors overrides into the default export when requested", async () => {
+    const homedir = () => "/tmp/home";
+
+    const mocked = await mockNodeBuiltinModule(
+      async () => ({ tmpdir: () => "/tmp" }),
+      { homedir },
+      { mirrorToDefault: true },
+    );
+
+    expect(mocked.default).toMatchObject({
+      homedir,
+      tmpdir: expect.any(Function),
+    });
+  });
+
+  it("preserves existing default exports while overriding members", async () => {
+    const actual = {
+      readFileSync: () => "actual",
+      default: {
+        readFileSync: () => "actual",
+        statSync: () => "stat",
+      },
+    };
+    const readFileSync = () => "mock";
+
+    const mocked = await mockNodeBuiltinModule(
+      async () => actual,
+      { readFileSync },
+      { mirrorToDefault: true },
+    );
+
+    expect(mocked.default).toMatchObject({
+      readFileSync,
+      statSync: expect.any(Function),
+    });
+  });
+});