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

node_modules/jsondiffpatch/lib/date-reviver.js

@@ -0,0 +1,12 @@
+// use as 2nd parameter for JSON.parse to revive Date instances
+export default function dateReviver(key, value) {
+    let parts;
+    if (typeof value === 'string') {
+        parts =
+            /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(?:\.(\d*))?(Z|([+-])(\d{2}):(\d{2}))$/.exec(value);
+        if (parts) {
+            return new Date(Date.UTC(+parts[1], +parts[2] - 1, +parts[3], +parts[4], +parts[5], +parts[6], +(parts[7] || 0)));
+        }
+    }
+    return value;
+}