Re-use pkg-lib for runtime plugin compilation

Summary: Re-use the same function for plugin building both at publishing time by "flipper-pkg" and in runtime by Flipper itself.

Reviewed By: jknoxville

Differential Revision: D21129685

fbshipit-source-id: b7bff6737310352d28a14223128f127ac4d2eebf

desktop/babel-transformer/src/__tests__/electron-requires-main.node.ts

@@ -0,0 +1,49 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {transform} from '@babel/core';
+import electronRequiresMainPlugin = require('../electron-requires-main');
+
+const babelOptions = {
+  ast: true,
+  plugins: [electronRequiresMainPlugin],
+  filename: 'index.js',
+};
+
+const testCase1 = "const module = require('module');";
+test(testCase1, () => {
+  const src = testCase1;
+  const code = transform(src, babelOptions)!.code;
+  expect(code).toMatchInlineSnapshot(
+    `"const module = electronRequire('module');"`,
+  );
+});
+
+const testCase2 = "const module = require('./module');";
+test(testCase2, () => {
+  const src = testCase2;
+  const code = transform(src, babelOptions)!.code;
+  expect(code).toMatchInlineSnapshot(`"const module = require('./module');"`);
+});
+
+const testCase3 = "const module = require('../module');";
+test(testCase3, () => {
+  const src = testCase3;
+  const code = transform(src, babelOptions)!.code;
+  expect(code).toMatchInlineSnapshot(`"const module = require('../module');"`);
+});
+
+const testCase4 = "const path = require.resolve('module');";
+test(testCase4, () => {
+  const src = testCase4;
+  const code = transform(src, babelOptions)!.code;
+  expect(code).toMatchInlineSnapshot(
+    `"const path = electronRequire.resolve('module');"`,
+  );
+});