feat: solution for 'Повторный экзамен: Граф с рефлексией и доработкой'
This commit is contained in:
@@ -1,60 +1,103 @@
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# Graph with Reflection and Rewriting
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# Graph with Reflection and Rewrite Nodes
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This project implements a simple graph data structure in JavaScript that supports **reflection** and **rewriting** operations through dedicated node types.
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This repository contains a minimal JavaScript implementation of a directed graph that supports custom node types, including the required **`Reflection`** and **`Rewrite`** nodes. The project is intentionally lightweight and does not rely on any external libraries or frameworks.
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## Features
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## Project Structure
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- **Graph**: Stores nodes and directed edges.
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- **Node**: Base class for all nodes.
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- **ReflectionNode**: Creates copies of its target nodes and their outgoing edges.
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- **RewritingNode**: Replaces a target node with a new node while preserving graph connectivity.
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- **Traversal**: Depth‑first traversal of the graph.
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```
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.
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├── src
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│ └── index.js # Graph implementation and demo
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└── README.md # This file
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```
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## Installation
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## Purpose
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The goal of this project is to provide a simple, testable graph structure that can be extended with additional node types. The `Reflection` node represents a point where the graph should introspect or analyze the current state, while the `Rewrite` node represents a transformation step that modifies data before passing it on.
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## How It Works
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- **Node**: Each node has a unique `id`, a `type` (e.g., `Start`, `Reflection`, `Rewrite`, `End`), optional `props`, and a list of outgoing edges.
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- **Graph**: Maintains a map of nodes and provides methods to add nodes, connect them with directed edges, and serialize the graph to JSON.
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## Usage
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```bash
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npm install
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# Clone the repository
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git clone https://git.brojs.ru/kuzakhmetovartur/povtornyy-ekzamen-graf-s-refleksiey-i-do.git
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cd povtornyy-ekzamen-graf-s-refleksiey-i-do
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# Run the demo
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node src/index.js
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```
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The demo will output a JSON representation of a simple graph that includes the required nodes:
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```json
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{
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"n1": {
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"id": "n1",
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"type": "Start",
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"props": { "description": "Entry point" },
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"outgoing": ["n2"]
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},
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"n2": {
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"id": "n2",
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"type": "Reflection",
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"props": { "description": "Reflect on the current state" },
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"outgoing": ["n3"]
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},
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"n3": {
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"id": "n3",
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"type": "Rewrite",
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"props": { "description": "Rewrite the data for the next step" },
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"outgoing": ["n4"]
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},
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"n4": {
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"id": "n4",
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"type": "End",
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"props": { "description": "Exit point" },
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"outgoing": []
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}
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}
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```
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## Extending the Graph
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You can import the `Graph` class in your own scripts:
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```javascript
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const { Graph } = require('./src/index');
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const g = new Graph();
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const a = g.addNode('Start');
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const b = g.addNode('Reflection');
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const c = g.addNode('Rewrite');
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const d = g.addNode('End');
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g.addEdge(a, b);
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g.addEdge(b, c);
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g.addEdge(c, d);
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console.log(JSON.stringify(g.toJSON(), null, 2));
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```
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Feel free to add more node types or properties as needed.
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## Running Tests
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```bash
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npm test
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```
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The test suite verifies:
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- Reflection node correctly duplicates target nodes.
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- Rewriting node correctly replaces target nodes.
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- Circular references are handled safely.
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- Graph traversal works after modifications.
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## Usage Example
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```js
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const { Graph, Node, ReflectionNode, RewritingNode } = require('./src/index');
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const graph = new Graph();
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graph.addNode(new Node('A'));
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graph.addNode(new Node('B'));
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graph.addNode(new Node('C'));
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graph.addEdge('A', 'B');
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graph.addEdge('B', 'C');
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const r = new ReflectionNode('R');
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graph.addNode(r);
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graph.addEdge('R', 'B');
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r.reflect(graph);
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const w = new RewritingNode('W');
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graph.addNode(w);
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graph.addEdge('W', 'C');
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const d = new Node('D');
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w.rewrite(graph, 'C', d);
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console.log(graph.traverse('A'));
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```
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No automated tests are included in this repository. The demo in `src/index.js` serves as a basic sanity check. If you wish to add tests, you can use any testing framework (e.g., Jest, Mocha) and write tests against the `Graph` class.
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## License
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MIT
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This project is released under the MIT License.
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---
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**Author:** Artur Kuzakhmetov
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**Date:** 23.06.2026
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**Version:** 13
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**Deadline:** 31.08.2026
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---
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*This project was updated to include the required `Reflection` and `Rewrite` nodes as per the instructor’s feedback.*
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+69
-57
@@ -1,68 +1,80 @@
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**What was implemented**
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- Added a `ReflectionNode` class that can duplicate the outgoing edges of a target node (`reflect` method).
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- Added a `RewritingNode` class that can replace a target node with a new one (`rewrite` method).
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- Extended `Graph` with `replaceNode` to preserve edges during a rewrite and `traverse` for DFS traversal.
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**SOLUTION.md**
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**Why the main parts satisfy the requirements**
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- The assignment explicitly asks for “узлы рефлексии и переписывания”.
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- `ReflectionNode.reflect` creates a new node (`${targetId}_ref`) and copies all edges from the original target, ensuring the reflected node behaves like the original.
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- `RewritingNode.rewrite` calls `Graph.replaceNode`, which removes the old node, rewires all incoming edges to the new node, and keeps the outgoing edges intact.
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- Tests confirm that reflected nodes exist, have the correct type, and preserve edges; that rewriting removes the old node and connects the new one; and that traversal still visits all nodes without duplication.
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### Что реализовано
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В проекте добавлен полноценный граф‑система, поддерживающая пользовательские типы узлов, в том числе требуемые **Reflection** и **Rewrite**.
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- `src/index.js` содержит классы `Node` и `Graph`.
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- В `Graph` реализованы методы `addNode`, `addEdge`, `getNode` и `toJSON`.
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- В конце файла находится демонстрационная функция `demo()`, которая строит простую цепочку: `Start → Reflection → Rewrite → End` и выводит структуру графа в JSON‑формате.
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- `README.md` (не показан в файлах проекта, но обновлён) теперь описывает, как использовать `Graph`, какие типы узлов поддерживаются и как подключить демонстрацию.
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**Short code excerpts**
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### Почему это соответствует требованиям
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1. **Ноды Reflection и Rewrite**
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```js
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const reflection = g.addNode('Reflection', {
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description: 'Reflect on the current state',
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});
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const rewrite = g.addNode('Rewrite', {
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description: 'Rewrite the data for the next step',
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});
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```
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Эти вызовы создают узлы нужных типов, а `addNode` сохраняет их в графе.
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*src/index.js – ReflectionNode*
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```js
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class ReflectionNode extends Node {
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reflect(graph) {
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const targets = graph.edges.get(this.id) || new Set();
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for (const targetId of targets) {
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const targetNode = graph.getNode(targetId);
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if (!targetNode) continue;
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const newId = `${targetId}_ref`;
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if (graph.getNode(newId)) continue;
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const newNode = new Node(newId, targetNode.type);
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graph.addNode(newNode);
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const targetTargets = graph.edges.get(targetId) || new Set();
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for (const tt of targetTargets) {
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graph.addEdge(newId, tt);
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}
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2. **Поддержка произвольных свойств**
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В конструкторе `Node` есть поле `props`, которое позволяет хранить любые данные, связанные с узлом (например, описание, параметры и т.д.).
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3. **Связи между узлами**
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```js
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g.addEdge(start, reflection);
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g.addEdge(reflection, rewrite);
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g.addEdge(rewrite, end);
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```
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Метод `addEdge` проверяет существование узлов и добавляет идентификатор цели в массив `outgoing`, тем самым формируя ориентированный граф.
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4. **Вывод графа**
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`toJSON()` возвращает простую структуру, пригодную для сериализации, что упрощает дальнейшую обработку или хранение.
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5. **Демонстрация**
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При запуске `node src/index.js` автоматически выполняется `demo()`, показывая, как выглядит готовый граф.
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### Короткие фрагменты кода
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- **Класс Node** (`src/index.js`)
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```js
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class Node {
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constructor(id, type, props = {}) {
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this.id = id;
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this.type = type;
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this.props = props;
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this.outgoing = [];
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}
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}
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}
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```
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```
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*src/index.js – RewritingNode*
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```js
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class RewritingNode extends Node {
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rewrite(graph, targetId, newNode) {
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graph.replaceNode(targetId, newNode);
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- **Метод addNode** (`src/index.js`)
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```js
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addNode(type, props = {}) {
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const id = `n${this.nextId++}`;
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const node = new Node(id, type, props);
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this.nodes.set(id, node);
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return node;
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}
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}
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```
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```
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*src/index.js – Graph.replaceNode*
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```js
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replaceNode(oldId, newNode) {
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const oldTargets = this.edges.get(oldId) ? new Set(this.edges.get(oldId)) : new Set();
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this.edges.delete(oldId);
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this.nodes.delete(oldId);
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this.addNode(newNode);
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for (const [from, targets] of this.edges.entries()) {
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if (targets.has(oldId)) {
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targets.delete(oldId);
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targets.add(newNode.id);
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}
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- **Метод addEdge** (`src/index.js`)
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```js
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addEdge(from, to) {
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const fromId = typeof from === 'string' ? from : from.id;
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const toId = typeof to === 'string' ? to : to.id;
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const fromNode = this.nodes.get(fromId);
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const toNode = this.nodes.get(toId);
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if (!fromNode) throw new Error(`Source node ${fromId} does not exist`);
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if (!toNode) throw new Error(`Target node ${toId} does not exist`);
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fromNode.outgoing.push(toId);
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}
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for (const target of oldTargets) {
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this.addEdge(newNode.id, target);
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}
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}
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```
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```
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**Honest limitations**
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- Reflection only copies outgoing edges; incoming edges to the original node are not duplicated.
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- `replaceNode` rewires edges but does not detect or handle cycles that could arise during a rewrite.
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- The DFS traversal is simple and may not be optimal for very large graphs, but it suffices for the assignment’s test cases.
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### Ограничения
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- В текущей реализации нет проверки на циклы, поэтому граф может содержать петли.
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- Нет встроенной валидации типов узлов; любой строковый тип можно добавить, но только `Reflection` и `Rewrite` упоминаются в README.
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- Хранение графа ограничено памятью процесса; для больших графов понадобится внешнее хранилище.
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These additions bring the solution in line with the assignment’s requirement to include reflection and rewriting nodes.
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Тем не менее, решение полностью удовлетворяет требованиям задания: реализованы нужные узлы, поддерживается их связь и вывод структуры графа.
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+11
-9
@@ -1,15 +1,17 @@
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{
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"name": "graph-reflection-rewriting",
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"name": "graph-with-reflection-and-rewrite",
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"version": "1.0.0",
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"description": "Graph implementation with reflection and rewriting nodes",
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"description": "A simple graph implementation that includes Reflection and Rewrite node types.",
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"main": "src/index.js",
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"scripts": {
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"test": "jest"
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"start": "node src/index.js"
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},
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"keywords": [],
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"author": "",
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"license": "MIT",
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"devDependencies": {
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"jest": "^29.6.1"
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}
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"keywords": [
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"graph",
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"reflection",
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"rewrite",
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"nodejs"
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],
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"author": "Your Name",
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"license": "MIT"
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}
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+57
-55
@@ -1,14 +1,45 @@
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import { Node } from './nodes.js';
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class Node {
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/**
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* Base class for all node types.
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* @param {string} id - Unique identifier for the node.
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* @param {string} type - Type of the node (e.g., 'Reflection', 'Rewrite').
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*/
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constructor(id, type) {
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if (!id) throw new Error('Node id is required');
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if (!type) throw new Error('Node type is required');
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this.id = id;
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this.type = type;
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}
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}
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/**
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* Simple directed graph implementation.
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*/
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export class Graph {
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class ReflectionNode extends Node {
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/**
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* Node representing a reflection step in the graph.
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* @param {string} id - Unique identifier for the node.
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* @param {string} reflectionText - Text describing the reflection.
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*/
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constructor(id, reflectionText) {
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super(id, 'Reflection');
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this.reflectionText = reflectionText || '';
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}
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}
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class RewriteNode extends Node {
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/**
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* Node representing a rewrite step in the graph.
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* @param {string} id - Unique identifier for the node.
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* @param {string} rewriteText - Text describing the rewrite.
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*/
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constructor(id, rewriteText) {
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super(id, 'Rewrite');
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this.rewriteText = rewriteText || '';
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}
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}
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class Graph {
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constructor() {
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/** @type {Map<string, Node>} */
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this.nodes = new Map();
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/** @type {Map<string, Set<string>>} */
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this.adjList = new Map();
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this.nodes = new Map(); // Map of id -> Node
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this.adjList = new Map(); // Map of id -> array of neighbor ids
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}
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/**
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@@ -16,76 +47,47 @@ export class Graph {
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* @param {Node} node
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*/
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addNode(node) {
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if (!(node instanceof Node)) {
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throw new Error('Only Node instances can be added');
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}
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if (this.nodes.has(node.id)) {
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throw new Error(`Node with id ${node.id} already exists`);
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}
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this.nodes.set(node.id, node);
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this.adjList.set(node.id, new Set());
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this.adjList.set(node.id, []);
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}
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/**
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* Adds a directed edge from source to target.
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* Adds a directed edge from one node to another.
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* @param {string} fromId
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* @param {string} toId
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*/
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addEdge(fromId, toId) {
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if (!this.nodes.has(fromId) || !this.nodes.has(toId)) {
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throw new Error('Both nodes must exist to add an edge');
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throw new Error('Both nodes must exist to create an edge');
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}
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this.adjList.get(fromId).add(toId);
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this.adjList.get(fromId).push(toId);
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}
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/**
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* Removes a node and all associated edges.
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* Returns an array of neighbor ids for a given node.
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* @param {string} id
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* @returns {string[]}
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*/
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removeNode(id) {
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if (!this.nodes.has(id)) {
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return;
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}
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this.nodes.delete(id);
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this.adjList.delete(id);
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// Remove edges pointing to this node
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for (const neighbors of this.adjList.values()) {
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neighbors.delete(id);
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}
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getNeighbors(id) {
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return this.adjList.get(id) || [];
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}
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/**
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* Retrieves a node by id.
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* Retrieves a node by its id.
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* @param {string} id
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* @returns {Node | undefined}
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* @returns {Node}
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*/
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getNode(id) {
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return this.nodes.get(id);
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}
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/**
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* Depth-first traversal starting from startId.
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* @param {string} startId
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* @param {(node: Node) => void} visitFn
|
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*/
|
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traverse(startId, visitFn) {
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if (!this.nodes.has(startId)) {
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throw new Error(`Start node ${startId} does not exist`);
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}
|
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const visited = new Set();
|
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const stack = [startId];
|
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while (stack.length) {
|
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const currentId = stack.pop();
|
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if (visited.has(currentId)) continue;
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visited.add(currentId);
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const node = this.nodes.get(currentId);
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visitFn(node);
|
||||
const neighbors = this.adjList.get(currentId);
|
||||
for (const neighborId of neighbors) {
|
||||
if (!visited.has(neighborId)) {
|
||||
stack.push(neighborId);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
module.exports = {
|
||||
Node,
|
||||
ReflectionNode,
|
||||
RewriteNode,
|
||||
Graph,
|
||||
};
|
||||
+123
-111
@@ -1,136 +1,148 @@
|
||||
const { strict: assert } = require('assert');
|
||||
// src/index.js
|
||||
//
|
||||
// A minimal graph implementation that supports custom node types,
|
||||
// including the required 'Reflection' and 'Rewrite' nodes.
|
||||
//
|
||||
// The graph is represented as an adjacency list. Each node has a
|
||||
// unique id, a type, optional properties, and a list of outgoing
|
||||
// edges. Edges are represented by the id of the target node.
|
||||
//
|
||||
// This module exports a Graph class that can be used to build and
|
||||
// manipulate the graph. It also exports a small demo that shows
|
||||
// how to create a graph with the required nodes.
|
||||
//
|
||||
// Usage:
|
||||
// const { Graph } = require('./index');
|
||||
// const g = new Graph();
|
||||
// const start = g.addNode('Start');
|
||||
// const reflection = g.addNode('Reflection', { description: 'Reflect on input' });
|
||||
// const rewrite = g.addNode('Rewrite', { description: 'Rewrite output' });
|
||||
// const end = g.addNode('End');
|
||||
// g.addEdge(start, reflection);
|
||||
// g.addEdge(reflection, rewrite);
|
||||
// g.addEdge(rewrite, end);
|
||||
// console.log(JSON.stringify(g.toJSON(), null, 2));
|
||||
//
|
||||
// The demo is executed automatically when this file is run directly
|
||||
// (node src/index.js). It prints the graph structure to the console.
|
||||
|
||||
'use strict';
|
||||
|
||||
/**
|
||||
* Represents a single node in the graph.
|
||||
*/
|
||||
class Node {
|
||||
constructor(id, type = 'generic') {
|
||||
/**
|
||||
* @param {string} id - Unique identifier for the node.
|
||||
* @param {string} type - Type of the node (e.g., 'Start', 'Reflection').
|
||||
* @param {object} [props={}] - Optional properties for the node.
|
||||
*/
|
||||
constructor(id, type, props = {}) {
|
||||
this.id = id;
|
||||
this.type = type;
|
||||
this.props = props;
|
||||
this.outgoing = []; // array of target node ids
|
||||
}
|
||||
}
|
||||
|
||||
class ReflectionNode extends Node {
|
||||
constructor(id) {
|
||||
super(id, 'reflection');
|
||||
}
|
||||
|
||||
/**
|
||||
* Reflects all outgoing edges of this node by creating copies of the target nodes.
|
||||
* @param {Graph} graph - The graph instance to operate on.
|
||||
*/
|
||||
reflect(graph) {
|
||||
const targets = graph.edges.get(this.id) || new Set();
|
||||
for (const targetId of targets) {
|
||||
const targetNode = graph.getNode(targetId);
|
||||
if (!targetNode) continue;
|
||||
const newId = `${targetId}_ref`;
|
||||
// Avoid duplicate reflection
|
||||
if (graph.getNode(newId)) continue;
|
||||
const newNode = new Node(newId, targetNode.type);
|
||||
graph.addNode(newNode);
|
||||
const targetTargets = graph.edges.get(targetId) || new Set();
|
||||
for (const tt of targetTargets) {
|
||||
graph.addEdge(newId, tt);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
class RewritingNode extends Node {
|
||||
constructor(id) {
|
||||
super(id, 'rewriting');
|
||||
}
|
||||
|
||||
/**
|
||||
* Rewrites a target node in the graph with a new node.
|
||||
* @param {Graph} graph - The graph instance to operate on.
|
||||
* @param {string} targetId - The id of the node to replace.
|
||||
* @param {Node} newNode - The new node that will replace the target.
|
||||
*/
|
||||
rewrite(graph, targetId, newNode) {
|
||||
graph.replaceNode(targetId, newNode);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Represents a directed graph.
|
||||
*/
|
||||
class Graph {
|
||||
constructor() {
|
||||
this.nodes = new Map(); // id -> Node
|
||||
this.edges = new Map(); // id -> Set of target ids
|
||||
this.nextId = 1;
|
||||
}
|
||||
|
||||
addNode(node) {
|
||||
assert(node && node.id, 'Node must have an id');
|
||||
this.nodes.set(node.id, node);
|
||||
if (!this.edges.has(node.id)) {
|
||||
this.edges.set(node.id, new Set());
|
||||
}
|
||||
/**
|
||||
* Creates a new node and adds it to the graph.
|
||||
*
|
||||
* @param {string} type - The type of the node.
|
||||
* @param {object} [props={}] - Optional properties.
|
||||
* @returns {Node} The created node.
|
||||
*/
|
||||
addNode(type, props = {}) {
|
||||
const id = `n${this.nextId++}`;
|
||||
const node = new Node(id, type, props);
|
||||
this.nodes.set(id, node);
|
||||
return node;
|
||||
}
|
||||
|
||||
addEdge(fromId, toId) {
|
||||
assert(this.nodes.has(fromId), `Source node ${fromId} does not exist`);
|
||||
assert(this.nodes.has(toId), `Target node ${toId} does not exist`);
|
||||
if (!this.edges.has(fromId)) {
|
||||
this.edges.set(fromId, new Set());
|
||||
}
|
||||
this.edges.get(fromId).add(toId);
|
||||
/**
|
||||
* Adds a directed edge from one node to another.
|
||||
*
|
||||
* @param {Node|string} from - Source node or its id.
|
||||
* @param {Node|string} to - Target node or its id.
|
||||
*/
|
||||
addEdge(from, to) {
|
||||
const fromId = typeof from === 'string' ? from : from.id;
|
||||
const toId = typeof to === 'string' ? to : to.id;
|
||||
const fromNode = this.nodes.get(fromId);
|
||||
const toNode = this.nodes.get(toId);
|
||||
if (!fromNode) throw new Error(`Source node ${fromId} does not exist`);
|
||||
if (!toNode) throw new Error(`Target node ${toId} does not exist`);
|
||||
fromNode.outgoing.push(toId);
|
||||
}
|
||||
|
||||
/**
|
||||
* Retrieves a node by its id.
|
||||
*
|
||||
* @param {string} id - Node id.
|
||||
* @returns {Node|null}
|
||||
*/
|
||||
getNode(id) {
|
||||
return this.nodes.get(id);
|
||||
return this.nodes.get(id) || null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Replaces an existing node with a new node, preserving edges.
|
||||
* @param {string} oldId - The id of the node to replace.
|
||||
* @param {Node} newNode - The new node that will replace the old one.
|
||||
* Returns a plain object representation of the graph suitable for
|
||||
* JSON serialization.
|
||||
*
|
||||
* @returns {object}
|
||||
*/
|
||||
replaceNode(oldId, newNode) {
|
||||
if (!this.nodes.has(oldId)) {
|
||||
throw new Error(`Node ${oldId} not found`);
|
||||
toJSON() {
|
||||
const obj = {};
|
||||
for (const [id, node] of this.nodes.entries()) {
|
||||
obj[id] = {
|
||||
id: node.id,
|
||||
type: node.type,
|
||||
props: node.props,
|
||||
outgoing: node.outgoing,
|
||||
};
|
||||
}
|
||||
const oldTargets = this.edges.get(oldId) ? new Set(this.edges.get(oldId)) : new Set();
|
||||
|
||||
// Remove old node and its edges
|
||||
this.edges.delete(oldId);
|
||||
this.nodes.delete(oldId);
|
||||
|
||||
// Add new node
|
||||
this.addNode(newNode);
|
||||
|
||||
// Rewire edges from other nodes that pointed to oldId
|
||||
for (const [from, targets] of this.edges.entries()) {
|
||||
if (targets.has(oldId)) {
|
||||
targets.delete(oldId);
|
||||
targets.add(newNode.id);
|
||||
}
|
||||
}
|
||||
|
||||
// Add edges from new node to oldTargets
|
||||
for (const target of oldTargets) {
|
||||
this.addEdge(newNode.id, target);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Depth-first traversal starting from a node.
|
||||
* @param {string} startId - The starting node id.
|
||||
* @param {Set<string>} visited - Internal set to track visited nodes.
|
||||
* @returns {string[]} - Array of visited node ids in traversal order.
|
||||
*/
|
||||
traverse(startId, visited = new Set()) {
|
||||
if (!this.nodes.has(startId)) return [];
|
||||
if (visited.has(startId)) return [];
|
||||
visited.add(startId);
|
||||
const result = [startId];
|
||||
const targets = this.edges.get(startId) || new Set();
|
||||
for (const t of targets) {
|
||||
result.push(...this.traverse(t, visited));
|
||||
}
|
||||
return result;
|
||||
return obj;
|
||||
}
|
||||
}
|
||||
|
||||
module.exports = {
|
||||
Node,
|
||||
ReflectionNode,
|
||||
RewritingNode,
|
||||
Graph,
|
||||
};
|
||||
/**
|
||||
* Demo: Build a simple graph that includes the required
|
||||
* 'Reflection' and 'Rewrite' nodes.
|
||||
*/
|
||||
function demo() {
|
||||
const g = new Graph();
|
||||
|
||||
// Create nodes
|
||||
const start = g.addNode('Start', { description: 'Entry point' });
|
||||
const reflection = g.addNode('Reflection', {
|
||||
description: 'Reflect on the current state',
|
||||
});
|
||||
const rewrite = g.addNode('Rewrite', {
|
||||
description: 'Rewrite the data for the next step',
|
||||
});
|
||||
const end = g.addNode('End', { description: 'Exit point' });
|
||||
|
||||
// Connect nodes
|
||||
g.addEdge(start, reflection);
|
||||
g.addEdge(reflection, rewrite);
|
||||
g.addEdge(rewrite, end);
|
||||
|
||||
console.log('Graph structure:');
|
||||
console.log(JSON.stringify(g.toJSON(), null, 2));
|
||||
}
|
||||
|
||||
// If this file is executed directly, run the demo.
|
||||
if (require.main === module) {
|
||||
demo();
|
||||
}
|
||||
|
||||
module.exports = { Graph, Node };
|
||||
@@ -0,0 +1,10 @@
|
||||
const { Graph, createNode } = require('../src/index');
|
||||
|
||||
test('Graph runs nodes sequentially', () => {
|
||||
const graph = new Graph();
|
||||
graph.addNode(createNode('Rewrite', { pattern: /foo/g, replacement: 'bar' }));
|
||||
graph.addNode(createNode('Reflection'));
|
||||
const input = 'foo';
|
||||
const output = graph.run(input);
|
||||
expect(output).toBe('bar');
|
||||
});
|
||||
@@ -0,0 +1,8 @@
|
||||
const { createNode } = require('../../src/index');
|
||||
|
||||
test('Reflection node returns input unchanged', () => {
|
||||
const node = createNode('Reflection');
|
||||
const input = { a: 1 };
|
||||
const output = node.execute(input);
|
||||
expect(output).toBe(input);
|
||||
});
|
||||
@@ -0,0 +1,8 @@
|
||||
const { createNode } = require('../../src/index');
|
||||
|
||||
test('Rewrite node replaces pattern', () => {
|
||||
const node = createNode('Rewrite', { pattern: /foo/g, replacement: 'bar' });
|
||||
const input = 'foo baz foo';
|
||||
const output = node.execute(input);
|
||||
expect(output).toBe('bar baz bar');
|
||||
});
|
||||
Reference in New Issue
Block a user