Update test framework: fix run_tests.py to support all test files, add auto-import-check for test files

node_modules/@protobufjs/fetch/tests/index.js

@@ -0,0 +1,16 @@
+var tape = require("tape");
+
+var fetch = require("..");
+
+tape.test("fetch", function(test) {
+
+    if (typeof Promise !== "undefined") {
+        var promise = fetch("NOTFOUND");
+        promise.catch(function() {});
+        test.ok(promise instanceof Promise, "should return a promise if callback has been omitted");
+    }
+
+    // TODO - some way to test this properly?
+    
+    test.end();
+});