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

node_modules/form-data-encoder/lib/cjs/util/createBoundary.js

@@ -0,0 +1,12 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const alphabet = "abcdefghijklmnopqrstuvwxyz0123456789";
+function createBoundary() {
+    let size = 16;
+    let res = "";
+    while (size--) {
+        res += alphabet[(Math.random() * alphabet.length) << 0];
+    }
+    return res;
+}
+exports.default = createBoundary;