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

node_modules/jsondiffpatch/lib/contexts/context.js

@@ -0,0 +1,30 @@
+export default class Context {
+    setResult(result) {
+        this.result = result;
+        this.hasResult = true;
+        return this;
+    }
+    exit() {
+        this.exiting = true;
+        return this;
+    }
+    push(child, name) {
+        child.parent = this;
+        if (typeof name !== 'undefined') {
+            child.childName = name;
+        }
+        child.root = this.root || this;
+        child.options = child.options || this.options;
+        if (!this.children) {
+            this.children = [child];
+            this.nextAfterChildren = this.next || null;
+            this.next = child;
+        }
+        else {
+            this.children[this.children.length - 1].next = child;
+            this.children.push(child);
+        }
+        child.next = this;
+        return this;
+    }
+}