test for nested options in node api (#652)

packages/babili/__tests__/__snapshots__/node-api-tests.js.snap

@@ -2,4 +2,6 @@
 
 exports[`Babili Node API override default babili options 1`] = `"function foo(){const bar=x(1),baz=y(2);return z(bar,baz)}"`;
 
+exports[`Babili Node API override nested babili options 1`] = `"function foo(){const a=x(1),b=y(2);return z(a,b)}"`;
+
 exports[`Babili Node API simple usage 1`] = `"function foo(){const a=x(1),b=y(2);return z(a,b)}"`;

packages/babili/__tests__/node-api-tests.js

@@ -23,4 +23,9 @@ describe("Babili Node API", () => {
     const babiliOpts = { mangle: false };
     expect(babili(sampleInput, babiliOpts).code).toMatchSnapshot();
   });
+
+  it("override nested babili options", () => {
+    const babiliOpts = { mangle: { keepFnName: false } };
+    expect(babili(sampleInput, babiliOpts).code).toMatchSnapshot();
+  });
 });