Add test for externalRuntime with AMD modules

test/fixtures/transformation/optional-external-runtime/amd/actual.js

@@ -0,0 +1 @@
+import foo from "someModule";

test/fixtures/transformation/optional-external-runtime/amd/expected.js

@@ -0,0 +1,6 @@
+define(["exports", "6to5-runtime", "someModule"], function (exports, _to5Runtime2, _someModule) {
+  "use strict";
+
+  var _to5Runtime = _to5Runtime2;
+  var foo = _to5Runtime.interopRequire(_someModule);
+});

test/fixtures/transformation/optional-external-runtime/amd/options.json

@@ -0,0 +1,3 @@
+{
+  "modules": "amd"
+}