Minor refactoring

forum-network/.eslintrc.js

@@ -30,4 +30,18 @@ module.exports = {
     'no-constant-condition': ['off'],
     'no-await-in-loop': ['off'],
   },
+  globals: {
+    _: 'readonly',
+    chai: 'readonly',
+    expect: 'readonly',
+    mocha: 'readonly',
+    describe: 'readonly',
+    context: 'readonly',
+    it: 'readonly',
+    specify: 'readonly',
+    before: 'readonly',
+    after: 'readonly',
+    beforeEach: 'readonly',
+    afterEach: 'readonly',
+  },
 };

forum-network/src/classes/forum-view.js

@@ -1,4 +1,4 @@
-import { Graph } from './graph.js';
+import { WDAG } from './wdag.js';
 
 class Author {
   constructor() {
@@ -21,7 +21,7 @@ class PostVertex {
 export class ForumView {
   constructor() {
     this.reputations = new Map();
-    this.posts = new Graph();
+    this.posts = new WDAG();
     this.authors = new Map();
   }
 
@@ -53,8 +53,8 @@ export class ForumView {
     const postVertex = new PostVertex(postId, author, stake, content, citations);
     console.log('addPost', { id: postId, postContent });
     this.posts.addVertex(postId, postVertex);
-    for (const citation of citations) {
-      this.posts.addEdge('citation', postId, citation.postId, citation);
+    for (const { postId: citedPostId, weight } of citations) {
+      this.posts.addEdge('citation', postId, citedPostId, weight);
     }
     this.applyNonbindingReputationEffects(postVertex);
   }

forum-network/src/classes/forum.js

@@ -1,17 +1,20 @@
 import { Actor } from './actor.js';
-import { Graph } from './graph.js';
+import { WDAG } from './wdag.js';
 import { Action } from './action.js';
 import { CryptoUtil } from './crypto.js';
 import params from '../params.js';
 import { ReputationHolder } from './reputation-holder.js';
 import { displayNumber } from '../util.js';
 
+const CITATION = 'citation';
+const BALANCE = 'balance';
+
 class Post extends Actor {
   constructor(forum, authorPublicKey, postContent) {
     const index = forum.posts.countVertices();
     const name = `Post${index + 1}`;
     super(name, forum.scene);
-    this.id = postContent.id ?? `post_${CryptoUtil.randomUUID()}`;
+    this.id = postContent.id ?? `post_${CryptoUtil.randomUUID().slice(0, 4)}`;
     this.authorPublicKey = authorPublicKey;
     this.value = 0;
     this.initialValue = 0;
@@ -47,7 +50,7 @@ export class Forum extends ReputationHolder {
   constructor(name, scene) {
     super(`forum_${CryptoUtil.randomUUID()}`, name, scene);
     this.id = this.reputationPublicKey;
-    this.posts = new Graph(scene);
+    this.posts = new WDAG(scene);
     this.actions = {
       addPost: new Action('add post', scene),
       propagateValue: new Action('propagate value', this.scene),
@@ -60,7 +63,7 @@ export class Forum extends ReputationHolder {
     await this.actions.addPost.log(this, post);
     this.posts.addVertex(post.id, post, post.getLabel());
     for (const { postId: citedPostId, weight } of post.citations) {
-      this.posts.addEdge('citation', post.id, citedPostId, { weight });
+      this.posts.addEdge(CITATION, post.id, citedPostId, weight);
     }
     return post.id;
   }
@@ -88,7 +91,8 @@ export class Forum extends ReputationHolder {
   }) {
     this.activate();
     const initialValue = bench.reputation.valueOf(tokenId);
-    const post = this.getPost(postId);
+    const postVertex = this.posts.getVertex(postId);
+    const post = postVertex.data;
     post.setStatus('Validated');
     post.initialValue = initialValue;
     this.posts.setVertexLabel(post.id, post.getLabel());
@@ -97,9 +101,13 @@ export class Forum extends ReputationHolder {
     // so that its value can be updated by future validated posts.
     post.tokenId = tokenId;
 
-    // Compute rewards
     const rewardsAccumulator = new Map();
-    await this.propagateValue(rewardsAccumulator, this, post, initialValue);
+
+    // Compute rewards
+    await this.propagateValue(
+      { to: postVertex, from: { data: this } },
+      { rewardsAccumulator, increment: initialValue },
+    );
 
     // Apply computed rewards to update values of tokens
     for (const [id, value] of rewardsAccumulator) {
@@ -118,46 +126,62 @@ export class Forum extends ReputationHolder {
     this.deactivate();
   }
 
-  async propagateValue(rewardsAccumulator, fromActor, post, increment, depth = 0) {
-    this.actions.propagateValue.log(fromActor, post, `(${increment})`);
+  /**
+   * @param {Edge} edge
+   * @param {Object} opaqueData
+   */
+  async propagateValue(edge, { rewardsAccumulator, increment, depth = 0 }) {
+    const postVertex = edge.to;
+    const post = postVertex?.data;
+
+    this.actions.propagateValue.log(edge.from.data, post, `(${increment})`);
+
+    console.log('propagateValue start', {
+      from: edge.from.id,
+      to: edge.to.id,
+      depth,
+      value: post.value,
+      increment,
+    });
 
-    // Recursively distribute reputation to citations, according to weights
-    let totalOutboundAmount = 0;
     if (params.referenceChainLimit === null || depth <= params.referenceChainLimit) {
-      for (const { postId: citedPostId, weight } of post.citations) {
-        const citedPost = this.getPost(citedPostId);
+      for (const citationEdge of this.posts.getEdges(CITATION, post)) {
+        const { to: citedPostVertex, data: { weight } } = citationEdge;
+        const citedPost = citedPostVertex.data;
         let outboundAmount = weight * increment;
-        // If this is a negative citation, it must not bring the target below zero value.
+        const balance = this.posts.getEdge(BALANCE, postVertex, citedPostVertex)?.data || 0;
+        console.log('Citation', {
+          citationEdge, outboundAmount, balance, citedPostValue: citedPost.value,
+        });
+        // We need to ensure that we propagate no more reputation than we leached
         if (outboundAmount < 0) {
-          const citedPostTotalCitationWeight = citedPost.citations.reduce((t, { weight: w }) => t += w, 0);
-          const citedPostCapacity = citedPost.value / (1 - citedPostTotalCitationWeight);
-          outboundAmount = Math.max(outboundAmount, -citedPostCapacity);
+          outboundAmount = Math.max(outboundAmount, -citedPost.value);
+          if (depth > 0) {
+            outboundAmount = Math.max(outboundAmount, -balance);
           }
-        const refundFromOutbound = await this.propagateValue(
+        }
+        increment -= outboundAmount * params.leachingValue;
+        this.posts.setEdge(BALANCE, postVertex, citedPostVertex, balance + outboundAmount);
+        await this.propagateValue(citationEdge, {
           rewardsAccumulator,
-          post,
-          citedPost,
-          outboundAmount,
-          depth + 1,
-        );
-        totalOutboundAmount += outboundAmount - refundFromOutbound;
+          increment: outboundAmount,
+          depth: depth + 1,
+        });
       }
     }
 
-    // Apply leaching value
-    const incrementAfterLeaching = increment - totalOutboundAmount * params.leachingValue;
+    const newValue = post.value + increment;
 
-    const rawNewValue = post.value + incrementAfterLeaching;
-    const newValue = Math.max(0, rawNewValue);
-    const appliedIncrement = newValue - post.value;
-    const refundToInbound = increment - appliedIncrement;
+    console.log('propagateValue end', {
+      depth,
+      increment,
+      newValue,
+    });
 
     // Award reputation to post author
-    rewardsAccumulator.set(post.tokenId, appliedIncrement);
+    rewardsAccumulator.set(post.tokenId, increment);
 
     // Increment the value of the post
     await this.setPostValue(post, newValue);
-
-    return refundToInbound;
   }
 }

forum-network/src/classes/list.js

@@ -0,0 +1,9 @@
+export class List {
+  constructor() {
+    this.items = [];
+  }
+
+  add(item) {
+    this.items.push(item);
+  }
+}

forum-network/src/classes/scene.js

@@ -2,6 +2,7 @@ import mermaid from 'https://unpkg.com/mermaid@9.2.2/dist/mermaid.esm.min.mjs';
 import { Actor } from './actor.js';
 import { Action } from './action.js';
 import { debounce, hexToRGB } from '../util.js';
+import { CryptoUtil } from './crypto.js';
 
 class MermaidDiagram {
   constructor(box, logBox) {
@@ -90,10 +91,11 @@ export class Scene {
     this.box.addBox('Spacer').setInnerHTML(' ');
     this.topSection = this.box.addBox('Top section').flex();
     this.displayValuesBox = this.topSection.addBox('Values');
-    this.middleSection = this.box.addBox('Middle section').flex();
+    this.middleSection = this.box.addBox('Middle section');
     this.box.addBox('Spacer').setInnerHTML(' ');
     this.actors = new Set();
     this.dateStart = new Date();
+    this.flowcharts = new Map();
 
     mermaid.mermaidAPI.initialize({
       startOnLoad: false,
@@ -117,26 +119,49 @@ export class Scene {
   withSequenceDiagram() {
     const box = this.box.addBox('Sequence diagram');
     this.box.addBox('Spacer').setInnerHTML(' ');
-    const logBox = this.box.addBox('Sequence diagram text');
+    const logBox = this.box.addBox('Sequence diagram text').addClass('dim');
     this.sequence = new MermaidDiagram(box, logBox);
     this.sequence.log('sequenceDiagram', false);
     return this;
   }
 
-  withFlowchart(direction = 'BT') {
-    const box = this.topSection.addBox('Flowchart');
-    this.box.addBox('Spacer').setInnerHTML(' ');
-    const logBox = this.box.addBox('Flowchart text');
+  withFlowchart({ direction = 'BT' } = {}) {
+    const box = this.topSection.addBox('Flowchart').addClass('padded');
+    const logBox = this.topSection.addBox('Flowchart text').addClass('dim');
     this.flowchart = new MermaidDiagram(box, logBox);
     this.flowchart.log(`graph ${direction}`, false);
     return this;
   }
 
+  withAdditionalFlowchart({ id, name, direction = 'BT' } = {}) {
+    const index = this.flowcharts.size;
+    name = name ?? `Flowchart ${index}`;
+    id = id ?? `flowchart_${CryptoUtil.randomUUID().slice(0, 4)}`;
+    const container = this.middleSection.addBox(name).flex();
+    const box = container.addBox('Flowchart').addClass('padded');
+    const logBox = container.addBox('Flowchart text').addClass('dim');
+    const flowchart = new MermaidDiagram(box, logBox);
+    flowchart.log(`graph ${direction}`, false);
+    this.flowcharts.set(id, flowchart);
+    return this;
+  }
+
+  lastFlowchart() {
+    if (!this.flowcharts.size) {
+      if (this.flowchart) {
+        return this.flowchart;
+      }
+      throw new Error('lastFlowchart: No additional flowcharts have been added.');
+    }
+    const flowcharts = Array.from(this.flowcharts.values());
+    return flowcharts[flowcharts.length - 1];
+  }
+
   withTable() {
     if (this.table) {
       return this;
     }
-    const box = this.middleSection.addBox('Table');
+    const box = this.middleSection.addBox('Table').addClass('padded');
     this.box.addBox('Spacer').setInnerHTML(' ');
     this.table = new Table(box);
     return this;

forum-network/src/classes/wdag.js

@@ -16,20 +16,27 @@ class Vertex {
 }
 
 class Edge {
-  constructor(label, from, to, data) {
+  constructor(label, from, to, weight) {
     this.from = from;
     this.to = to;
     this.label = label;
-    this.data = data;
+    this.weight = weight;
   }
 }
 
-export class Graph {
+export class WDAG {
   constructor(scene) {
     this.scene = scene;
     this.vertices = new Map();
     this.edgeLabels = new Map();
     this.nextVertexId = 0;
+    this.flowchart = scene?.flowchart ?? null;
+  }
+
+  withFlowchart() {
+    this.scene.withAdditionalFlowchart();
+    this.flowchart = this.scene.lastFlowchart();
+    return this;
   }
 
   addVertex(id, data, label) {
@@ -43,16 +50,12 @@ export class Graph {
     }
     const vertex = new Vertex(id, data);
     this.vertices.set(id, vertex);
-    if (this.scene && this.scene.flowchart) {
-      this.scene.flowchart.log(`${id}[${label ?? id}]`);
-    }
+    this.flowchart?.log(`${id}[${label ?? id}]`);
     return this;
   }
 
   setVertexLabel(id, label) {
-    if (this.scene && this.scene.flowchart) {
-      this.scene.flowchart.log(`${id}[${label}]`);
-    }
+    this.flowchart?.log(`${id}[${label}]`);
   }
 
   getVertex(id) {
@@ -68,36 +71,43 @@ export class Graph {
   }
 
   getEdge(label, from, to) {
+    from = from instanceof Vertex ? from : this.getVertex(from);
+    to = to instanceof Vertex ? to : this.getVertex(to);
     const edges = this.edgeLabels.get(label);
-    return edges?.get(JSON.stringify({ from, to }));
+    return edges?.get(JSON.stringify([from.id, to.id]));
   }
 
   setEdge(label, from, to, edge) {
+    from = from instanceof Vertex ? from : this.getVertex(from);
+    to = to instanceof Vertex ? to : this.getVertex(to);
+    if (!(edge instanceof Edge)) {
+      edge = new Edge(edge);
+    }
     let edges = this.edgeLabels.get(label);
     if (!edges) {
       edges = new Map();
       this.edgeLabels.set(label, edges);
     }
-    edges.set(JSON.stringify({ from, to }), edge);
+    edges.set(JSON.stringify([from.id, to.id]), edge);
   }
 
-  addEdge(label, from, to, data) {
+  addEdge(label, from, to, weight) {
+    from = from instanceof Vertex ? from : this.getVertex(from);
+    to = to instanceof Vertex ? to : this.getVertex(to);
     if (this.getEdge(label, from, to)) {
       throw new Error(`Edge ${label} from ${from} to ${to} already exists`);
     }
-    const edge = new Edge(label, from, to, data);
+    const edge = new Edge(label, from, to, weight);
     this.setEdge(label, from, to, edge);
-    const fromVertex = this.getVertex(from);
-    fromVertex.edges.from.push(edge);
-    const toVertex = this.getVertex(to);
-    toVertex.edges.to.push(edge);
-    if (this.scene && this.scene.flowchart) {
-      this.scene.flowchart.log(`${fromVertex.id} -- ${data.weight} --> ${toVertex.id}`);
-    }
+    from.edges.from.push(edge);
+    to.edges.to.push(edge);
+    this.flowchart?.log(`${from.id} -- ${weight} --> ${to.id}`);
     return this;
   }
 
   getEdges(label, from, to) {
+    from = from instanceof Vertex ? from : this.getVertex(from);
+    to = to instanceof Vertex ? to : this.getVertex(to);
     const edgeLabels = label ? [label] : Array.from(this.edgeLabels.keys());
     return edgeLabels.flatMap((edgeLabel) => {
       const edges = this.edgeLabels.get(edgeLabel);

forum-network/src/index.css

@@ -29,6 +29,12 @@ a:visited {
   font-family: monospace;
   font-size: 8pt;
 }
+.dim {
+  opacity: 0.25;
+}
+.padded {
+  padding: 20px;
+}
 svg {
   width: 800px;
 }

forum-network/src/index.html

@@ -7,19 +7,19 @@
   <h2>Tests</h2>
   <h3>Primary</h3>
   <ul>
-    <li><a href="./tests/validation-pool.html">Validation Pool</a></li>
-    <li><a href="./tests/availability.html">Availability + Business</a></li>
-    <li><a href="./tests/forum.html">Forum</a></li>
+    <li><a href="./tests/validation-pool.test.html">Validation Pool</a></li>
+    <li><a href="./tests/availability.test.html">Availability + Business</a></li>
+    <li><a href="./tests/forum.test.html">Forum</a></li>
   </ul>
   <h3>Secondary</h3>
   <ul>
-    <li><a href="./tests/forum-network.html">Forum Network</a></li>
+    <li><a href="./tests/forum-network.test.html">Forum Network</a></li>
   </ul>
   <h3>Tertiary</h3>
   <ul>
-    <li><a href="./tests/basic.html">Basic</a></li>
-    <li><a href="./tests/graph.html">Graph</a></li>
-    <li><a href="./tests/debounce.html">Debounce</a></li>
-    <li><a href="./tests/flowchart.html">Flowchart</a></li>
+    <li><a href="./tests/basic.test.html">Basic Sequencing</a></li>
+    <li><a href="./tests/wdag.test.html">WDAG</a></li>
+    <li><a href="./tests/debounce.test.html">Debounce</a></li>
+    <li><a href="./tests/flowchart.test.html">Flowchart</a></li>
   </ul>
 </body>

forum-network/src/tests/forum.html

@@ -1,9 +0,0 @@
-<!DOCTYPE html>
-<head>
-  <title>Forum test</title>
-  <link type="text/css" rel="stylesheet" href="../index.css" />
-</head>
-<body>
-  <div id="forum-test"></div>
-</body>
-<script type="module" src="./forum/forum.test.js"></script>

forum-network/src/tests/forum.test.html

@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<head>
+  <title>Forum test</title>
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="https://unpkg.com/mocha/mocha.css" />
+  <link type="text/css" rel="stylesheet" href="../index.css" />
+</head>
+<body>
+  <div id="mocha"></div>
+  <div id="scene"></div>
+</body>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/radash/10.7.0/radash.js" integrity="sha512-S207zKWG3iqXqe6msO7/Mr8X3DzzF4u8meFlokHjGtBPTGUhgzVo0lpcqEy0GoiMUdcoct+H+SqzoLsxXbynzg==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
+<script src="https://unpkg.com/chai/chai.js"></script>
+<script src="https://unpkg.com/mocha/mocha.js"></script>
+<script class="mocha-init">
+  mocha.setup({
+    ui: 'bdd',
+    globals: ['scene', 'bench', 'forum', 'experts', 'posts', '__REACT_DEVTOOLS_*'],
+});
+  mocha.checkLeaks();
+  chai.should();
+</script>
+<script type="module" src="./scripts/forum.test.js"></script>
+<script class="mocha-exec">
+  mocha.run();
+</script>

forum-network/src/tests/forum/forum.test.js

@@ -1,79 +0,0 @@
-import { Box } from '../../classes/box.js';
-import { Scene } from '../../classes/scene.js';
-import { Expert } from '../../classes/expert.js';
-import { Bench } from '../../classes/bench.js';
-import { delay } from '../../util.js';
-import { Forum } from '../../classes/forum.js';
-import { PostContent } from '../../classes/post-content.js';
-import params from '../../params.js';
-
-const DEFAULT_DELAY_INTERVAL = 500;
-
-const rootElement = document.getElementById('forum-test');
-const rootBox = new Box('rootBox', rootElement).flex();
-
-const scene = (window.scene = new Scene('Forum test', rootBox));
-scene.withSequenceDiagram();
-scene.withFlowchart();
-scene.withTable();
-
-scene.addDisplayValue('c3. stakeForAuthor').set(params.stakeForAuthor);
-scene.addDisplayValue('q2. revaluationLimit').set(params.revaluationLimit);
-scene
-  .addDisplayValue('q3. referenceChainLimit')
-  .set(params.referenceChainLimit);
-scene.addDisplayValue('q4. leachingValue').set(params.leachingValue);
-scene.addDisplayValue(' ');
-
-const experts = (window.experts = []);
-const newExpert = async () => {
-  const index = experts.length;
-  const name = `Expert${index + 1}`;
-  const expert = await new Expert(name, scene).initialize();
-  experts.push(expert);
-  return expert;
-};
-
-const forum = (window.forum = new Forum('Forum', scene));
-const bench = (window.bench = new Bench(forum, 'Bench', scene));
-const expert1 = await newExpert();
-const expert2 = await newExpert();
-const expert3 = await newExpert();
-
-bench.addValue('total rep', () => bench.reputation.getTotal());
-forum.addValue('total value', () => forum.getTotalValue());
-
-for (const expert of experts) {
-  expert.addValue('rep', () => bench.reputation.valueOwnedBy(expert.reputationPublicKey));
-}
-
-const addPost = async (author, title, fee, citations = []) => {
-  await scene.startSection();
-
-  const postContent = new PostContent({}).setTitle(title);
-  for (const { postId, weight } of citations) {
-    postContent.addCitation(postId, weight);
-  }
-
-  const { pool, postId } = await author.submitPostWithFee(
-    bench,
-    forum,
-    postContent,
-    {
-      fee,
-      duration: 1000,
-      tokenLossRatio: 1,
-    },
-  );
-  await delay(1000);
-  await pool.evaluateWinningConditions();
-  await scene.endSection();
-  await delay(DEFAULT_DELAY_INTERVAL);
-  return postId;
-};
-
-const postId1 = await addPost(expert1, 'Post 1', 20);
-const postId2 = await addPost(expert2, 'Post 2', 10, [{ postId: postId1, weight: 0.5 }]);
-const postId3 = await addPost(expert3, 'Post 3', 10, [{ postId: postId1, weight: -1 }]);
-await addPost(expert3, 'Post 4', 100, [{ postId: postId2, weight: -1 }]);
-await addPost(expert1, 'Post 5', 100, [{ postId: postId3, weight: -1 }]);

forum-network/src/tests/graph.html

@@ -1,33 +0,0 @@
-<!DOCTYPE html>
-<head>
-  <title>Forum Graph</title>
-  <link type="text/css" rel="stylesheet" href="../index.css" />
-</head>
-<body>
-  <div id="graph-test"></div>
-</body>
-<script type="module">
-  import { Box } from '../classes/box.js';
-  import { Scene } from '../classes/scene.js';
-  import { Graph } from '../classes/graph.js';
-
-  const rootElement = document.getElementById('graph-test');
-  const rootBox = new Box('rootBox', rootElement).flex();
-
-  window.scene = new Scene('Graph test', rootBox);
-
-  window.graph = new Graph();
-
-  window.v = [];
-  function addVertex() {
-    const vertex = window.graph.addVertex({ seq: window.v.length });
-    window.v.push(vertex);
-  }
-  addVertex();
-  addVertex();
-  addVertex();
-  addVertex();
-  addVertex();
-
-  window.graph.addEdge('e1', 0, 1);
-</script>

forum-network/src/tests/mocha.test.html

@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>Mocha Tests</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="stylesheet" href="https://unpkg.com/mocha/mocha.css" />
+  </head>
+  <body>
+    <div id="mocha"></div>
+    <div id="scene"></div>
+
+    <script src="https://unpkg.com/chai/chai.js"></script>
+    <script src="https://unpkg.com/mocha/mocha.js"></script>
+
+    <script class="mocha-init">
+      mocha.setup({
+        ui: 'bdd',
+      });
+      mocha.checkLeaks();
+      chai.should();
+    </script>
+    <script src="./scripts/mocha.test.js"></script>
+    <script class="mocha-exec">
+      mocha.run();
+    </script>
+  </body>
+</html>

forum-network/src/tests/reputation.test.html

@@ -9,9 +9,9 @@
 <script type="module">
 import { Box } from '../classes/box.js';
 import { Scene } from '../classes/scene.js';
-import { ValidationPool } from '../classes/validation-pool.js';
-import { TokenHolder } from '../classes/token-holder.js';
-import { ReputationToken } from '../classes/reputation-token.js';
+// import { ValidationPool } from '../classes/validation-pool.js';
+// import { TokenHolder } from '../classes/token-holder.js';
+// import { ReputationToken } from '../classes/reputation-token.js';
 import { delay } from '../util.js';
 
 const DEFAULT_DELAY_INTERVAL = 500;
@@ -23,8 +23,8 @@ const scene = (window.scene = new Scene('Forum test', rootBox));
 scene.withSequenceDiagram();
 scene.withFlowchart();
 
-const pool = new ValidationPool();
-const repToken = new ReputationToken();
+// const pool = new ValidationPool();
+// const repToken = new ReputationToken();
 
 // const tokenMinter = new TokenHolder('TokenMinter', scene);
 

forum-network/src/tests/scripts/forum.test.js

@@ -0,0 +1,110 @@
+import { Box } from '../../classes/box.js';
+import { Scene } from '../../classes/scene.js';
+import { Expert } from '../../classes/expert.js';
+import { Bench } from '../../classes/bench.js';
+import { delay } from '../../util.js';
+import { Forum } from '../../classes/forum.js';
+import { PostContent } from '../../classes/post-content.js';
+import params from '../../params.js';
+
+const DEFAULT_DELAY_MS = 1;
+const POOL_DURATION_MS = 50;
+
+let rootElement;
+let rootBox;
+let scene;
+let forum;
+let bench;
+let experts;
+let posts;
+
+async function newExpert() {
+  const index = experts.length;
+  const name = `Expert${index + 1}`;
+  const expert = await new Expert(name, scene).initialize();
+  experts.push(expert);
+  return expert;
+}
+
+async function addPost(author, fee, citations = []) {
+  const postIndex = posts.length;
+  const title = `posts[${postIndex}]`;
+  await scene.startSection();
+
+  const postContent = new PostContent({}).setTitle(title);
+  for (const { postId, weight } of citations) {
+    postContent.addCitation(postId, weight);
+  }
+
+  const { pool, postId } = await author.submitPostWithFee(
+    bench,
+    forum,
+    postContent,
+    {
+      fee,
+      duration: POOL_DURATION_MS,
+      tokenLossRatio: 1,
+    },
+  );
+  posts.push(postId);
+  await delay(POOL_DURATION_MS);
+  await pool.evaluateWinningConditions();
+  await scene.endSection();
+  await delay(DEFAULT_DELAY_MS);
+  return postId;
+}
+
+async function setup() {
+  rootElement = document.getElementById('scene');
+  rootBox = new Box('rootBox', rootElement).flex();
+
+  scene = (window.scene = new Scene('Forum test', rootBox));
+  scene.withSequenceDiagram();
+
+  scene.addDisplayValue('c3. stakeForAuthor').set(params.stakeForAuthor);
+  scene.addDisplayValue('q2. revaluationLimit').set(params.revaluationLimit);
+  scene
+    .addDisplayValue('q3. referenceChainLimit')
+    .set(params.referenceChainLimit);
+  scene.addDisplayValue('q4. leachingValue').set(params.leachingValue);
+  scene.addDisplayValue(' ');
+
+  forum = (window.forum = new Forum('Forum', scene));
+  bench = (window.bench = new Bench(forum, 'Bench', scene));
+  experts = (window.experts = []);
+  posts = (window.posts = []);
+
+  forum.posts.withFlowchart();
+
+  scene.withTable();
+
+  await newExpert();
+  // await newExpert();
+  // await newExpert();
+
+  // bench.addValue('total rep', () => bench.reputation.getTotal());
+  forum.addValue('total value', () => forum.getTotalValue());
+
+// for (const expert of experts) {
+// expert.addValue('rep', () => bench.reputation.valueOwnedBy(expert.reputationPublicKey));
+// }
+}
+
+describe('Negative citation of a negative citation', async () => {
+  before(async () => {
+    await setup();
+    await addPost(experts[0], 10);
+    await addPost(experts[0], 10, [{ postId: posts[0], weight: -1 }]);
+    await addPost(experts[0], 10, [{ postId: posts[1], weight: -1 }]);
+  });
+  it('Should restore original post to its initial value', () => {
+    forum.getPost(posts[0]).value.should.equal(10);
+  });
+});
+
+// await addPost(experts[0], 10);
+// await addPost(experts[0], 10, [{ postId: posts[3], weight: -1 }]);
+// await addPost(experts[0], 10, [{ postId: posts[4], weight: -1 }]);
+
+// await addPost(expert3, 'Post 4', 100, [{ postId: postId2, weight: -1 }]);
+// await addPost(expert1, 'Post 5', 100, [{ postId: postId3, weight: -1 }]);

forum-network/src/tests/scripts/mocha.test.js

@@ -0,0 +1,23 @@
+describe('Array', () => {
+  before(() => {
+    // ...
+  });
+
+  describe('#indexOf()', () => {
+    context('when not present', () => {
+      it('should not throw an error', () => {
+        (function aFunc() {
+          [1, 2, 3].indexOf(4);
+        }.should.not.throw());
+      });
+      it('should return -1', () => {
+        [1, 2, 3].indexOf(4).should.equal(-1);
+      });
+    });
+    context('when present', () => {
+      it('should return the index where the element first appears in the array', () => {
+        [1, 2, 3].indexOf(3).should.equal(2);
+      });
+    });
+  });
+});

forum-network/src/tests/scripts/wdag.test.js

@@ -0,0 +1,23 @@
+import { Box } from '../../classes/box.js';
+import { Scene } from '../../classes/scene.js';
+import { WDAG } from '../../classes/wdag.js';
+
+const rootElement = document.getElementById('scene');
+const rootBox = new Box('rootBox', rootElement).flex();
+window.scene = new Scene('WDAG test', rootBox);
+const graph = (window.graph = new WDAG(window.scene).withFlowchart());
+const v = (window.v = []);
+function addVertex() {
+  const vertex = graph.addVertex({ seq: window.v.length });
+  v.push(vertex);
+}
+addVertex();
+addVertex();
+addVertex();
+addVertex();
+addVertex();
+
+graph.addEdge('e1', 0, 1, 1);
+graph.addEdge('e1', 2, 1, 0.5);
+graph.addEdge('e1', 3, 1, 0.25);
+graph.addEdge('e1', 1, 4, 0.125);

forum-network/src/tests/wdag.test.html

@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<head>
+  <title>Forum WDAG</title>
+  <link type="text/css" rel="stylesheet" href="../index.css" />
+</head>
+<body>
+  <div id="scene"></div>
+</body>
+<script type="module" src="./scripts/wdag.test.js"></script>