JS: Add some tests with Closure modules

Author: asgerf

javascript/ql/test/library-tests/UnderlyingTypes/closure.es.js

@@ -0,0 +1,5 @@
+goog.declareModuleId("closure.es")
+
+const Bar = goog.require('closure.reexported.Bar');
+
+export { Bar }

javascript/ql/test/library-tests/UnderlyingTypes/closure.lib.js

@@ -0,0 +1,3 @@
+goog.module("closure.lib")
+
+exports.Foo = goog.require('closure.reexported.Foo');

javascript/ql/test/library-tests/UnderlyingTypes/closure.use.js

@@ -0,0 +1,16 @@
+goog.module("closure.use")
+
+const lib = goog.require("closure.lib");
+const es = goog.require("closure.es");
+
+/**
+ * @param {lib.Foo} x
+ */
+function t1(x) { // $ hasUnderlyingType=closure.reexported.Foo hasUnderlyingType=closure.lib.Foo
+}
+
+/**
+ * @param {es.Bar} x
+ */
+function t2(x) { // $ hasUnderlyingType=closure.reexported.Bar hasUnderlyingType=closure.es.Bar
+}