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

node_modules/jose/dist/webapi/lib/base64.js

@@ -0,0 +1,22 @@
+export function encodeBase64(input) {
+    if (Uint8Array.prototype.toBase64) {
+        return input.toBase64();
+    }
+    const CHUNK_SIZE = 0x8000;
+    const arr = [];
+    for (let i = 0; i < input.length; i += CHUNK_SIZE) {
+        arr.push(String.fromCharCode.apply(null, input.subarray(i, i + CHUNK_SIZE)));
+    }
+    return btoa(arr.join(''));
+}
+export function decodeBase64(encoded) {
+    if (Uint8Array.fromBase64) {
+        return Uint8Array.fromBase64(encoded);
+    }
+    const binary = atob(encoded);
+    const bytes = new Uint8Array(binary.length);
+    for (let i = 0; i < binary.length; i++) {
+        bytes[i] = binary.charCodeAt(i);
+    }
+    return bytes;
+}