test(bundle-source): Move and update explicit powers test (#2672)

packages/bundle-source/test/test-explicit.js

@@ -0,0 +1,20 @@
+/* global __dirname */
+import '@agoric/install-ses';
+import test from 'ava';
+import { rollup } from 'rollup';
+import { resolve as pathResolve } from 'path';
+import resolvePlugin from '@rollup/plugin-node-resolve';
+import bundleSource from '..';
+
+test('explicit authority', async t => {
+  const { moduleFormat } = await bundleSource(
+    `${__dirname}/../demo/dir1`,
+    'getExport',
+    {
+      rollup,
+      resolvePlugin,
+      pathResolve,
+    },
+  );
+  t.is(moduleFormat, 'getExport', 'module format is getExport');
+});