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

node_modules/jsondiffpatch/lib/contexts/diff.js

@@ -0,0 +1,25 @@
+import Context from './context.js';
+import defaultClone from '../clone.js';
+class DiffContext extends Context {
+    constructor(left, right) {
+        super();
+        this.left = left;
+        this.right = right;
+        this.pipe = 'diff';
+    }
+    setResult(result) {
+        if (this.options.cloneDiffValues && typeof result === 'object') {
+            const clone = typeof this.options.cloneDiffValues === 'function'
+                ? this.options.cloneDiffValues
+                : defaultClone;
+            if (typeof result[0] === 'object') {
+                result[0] = clone(result[0]);
+            }
+            if (typeof result[1] === 'object') {
+                result[1] = clone(result[1]);
+            }
+        }
+        return super.setResult(result);
+    }
+}
+export default DiffContext;