Basic draft library (#19)

Supports set, cube, i8pcube drafts with dumb bots. No support for block draft yet.

.drone.yml

@@ -116,14 +116,14 @@ steps:
   - name: test
     image: node
     commands:
-      - yarn test:unit
+      - yarn test:unit --runInBand
     depends_on:
       - dependencies
 
   - name: coverage
     image: node
     commands:
-      - yarn test:unit --coverage
+      - yarn test:unit --coverage --runInBand
     depends_on:
       - test # Must run after test otherwise SQLite will get mad
 

src/mlpccg/database.ts

@@ -1,10 +1,10 @@
 import Dexie from "dexie";
-import { Card, CardFilter, StoredImages } from "./types";
+import { Card, CardFilter, StoredImage } from "./types";
 import { cardFullName } from "./card";
 
 class CardDatabase extends Dexie {
   public cards: Dexie.Table<Card, string>;
-  public images: Dexie.Table<StoredImages, string>;
+  public images: Dexie.Table<StoredImage, string>;
 
   public constructor() {
     super("CardDatabase");
@@ -20,7 +20,9 @@ class CardDatabase extends Dexie {
 export let Database: CardDatabase | null = null;
 
 export function initDB() {
-  Database = new CardDatabase();
+  if (Database == null) {
+    Database = new CardDatabase();
+  }
 }
 
 export async function getCards(filter: CardFilter) {
@@ -151,3 +153,15 @@ export async function getCards(filter: CardFilter) {
   });
   return await results.toArray();
 }
+
+export async function cardFromIDs(cardIDs: string[]): Promise<Card[]> {
+  if (Database == null) {
+    throw new Error("Database was not initialized, init with 'initDB()'");
+  }
+  let table = Database.cards;
+  //TODO Replace with .bulkGet when upgrading to Dexie 3.x
+  return await table
+    .where("ID")
+    .anyOf(cardIDs)
+    .toArray();
+}

src/mlpccg/draft/booster.ts

@@ -0,0 +1,211 @@
+import { Card, getCards } from "@/mlpccg";
+import { Pack, PackSchema, AlternateProvider } from "./types";
+
+/*
+
+(This data was taken from the MLP:CCG wikia at mlpccg.fandom.com and confirmed
+ by people at the MLP:CCG Discord)
+
+Distribution rates for packs is usually 8 commons, 3 uncommons and 1 rare.
+
+No Fixed or Promo cards can be found in packs.
+
+UR distribution depends on set:
+	- PR has 1/13 chance of UR replacing a common
+	- CN->AD has 1/11 chance of UR replacing a common
+	- EO->FF has 1/3 chance of SR/UR replacing a common
+
+SR are twice as common as UR, so that's one more thing to keep in mind.
+
+Lastly, RR can replace another common in the ratio of ~1/2 every 6 boxes, depending
+on set. Specifically, this is the RR ratio for each set:
+	- EO->HM: 1/108
+	- MT->FF: 1/216
+
+*/
+
+// Returns the pack schema for a specific set
+async function setSchema(set: string): Promise<PackSchema> {
+  // Force set name to uppercase
+  set = set.toUpperCase();
+
+  // Return blank schemas for invalid sets
+  if (set == "RR" || set == "CS") {
+    return { slots: [] };
+  }
+
+  // Get cards for set
+  let cards = await getCards({ Sets: [set] });
+  let cardMap = spanByRarity(cards);
+
+  let rr: AlternateProvider[] = [];
+  let srur: AlternateProvider[] = [];
+
+  // Check for RR chances
+  /*
+  switch (set) {
+    case "EO":
+    case "HM":
+      rr = [
+        {
+          probability: 1.0 / 108.0,
+          provider: randomProvider([
+            //TODO
+          ])
+        }
+      ];
+      break;
+    case "MT":
+    case "HM":
+    case "SB":
+    case "FF":
+      rr = [
+        {
+          probability: 1.0 / 216.0,
+          provider: randomProvider([
+            //TODO
+          ])
+        }
+      ];
+      break;
+  }
+  */
+
+  // Check for SR/UR chances
+  switch (set) {
+    case "PR":
+      srur = [
+        {
+          probability: 1.0 / 13.0,
+          provider: randomProvider(cardMap["UR"])
+        }
+      ];
+      break;
+    case "CN":
+    case "CG":
+    case "AD":
+      srur = [
+        {
+          probability: 1.0 / 11.0,
+          provider: randomProvider(cardMap["UR"])
+        }
+      ];
+      break;
+    default:
+      srur = [
+        {
+          probability: (1.0 / 9.0) * 2.0,
+          provider: randomProvider(cardMap["SR"])
+        },
+        {
+          probability: 1.0 / 9.0,
+          provider: randomProvider(cardMap["UR"])
+        }
+      ];
+      break;
+  }
+
+  return {
+    slots: [
+      {
+        amount: 6,
+        provider: randomProvider(cardMap["C"]),
+        alternate: []
+      },
+      {
+        amount: 1,
+        provider: randomProvider(cardMap["C"]),
+        alternate: rr
+      },
+      {
+        amount: 1,
+        provider: randomProvider(cardMap["C"]),
+        alternate: srur
+      },
+      {
+        amount: 1,
+        provider: randomProvider(cardMap["R"]),
+        alternate: []
+      },
+      {
+        amount: 3,
+        provider: randomProvider(cardMap["U"]),
+        alternate: []
+      }
+    ]
+  };
+}
+
+export class PackBuilder {
+  schema: PackSchema;
+  constructor(schema: PackSchema) {
+    this.schema = schema;
+  }
+
+  buildPack(): Pack {
+    let pack = [];
+    for (const slot of this.schema.slots) {
+      let provider = slot.provider;
+
+      // Check for alternates by generating a random and checking cumulated
+      // probability. Ie. if one card would show 5% of the time, another would
+      // show up 10% of the time, the algorithm would do something like this:
+      //
+      // With Math.random() == 0.85:
+      //  ALTERNATE     NO ALTERNATE
+      // [0.00-0.05][0.06----0.15][0.16------------1.00]
+      //                                        ^ 0.85
+      //
+      // With Math.random() == 0.03:
+      //  ALTERNATE     NO ALTERNATE
+      // [0.00-0.05][0.06----0.15][0.16------------1.00]
+      //    ^ 0.03
+
+      const rnd = Math.random();
+      let currentProb = 0;
+      for (const alternate of slot.alternate) {
+        currentProb += alternate.probability;
+        // Alternate matched
+        if (currentProb > rnd) {
+          provider = alternate.provider;
+          break;
+        }
+      }
+      for (let i = 0; i < slot.amount; i++) {
+        const res = provider.next();
+        if (res.done) {
+          // No more cards to get from this, exit early
+          break;
+        }
+        pack.push(res.value);
+      }
+    }
+    return pack;
+  }
+
+  static async fromSet(set: string): Promise<PackBuilder> {
+    let schema = await setSchema(set);
+    let builder = new PackBuilder(schema);
+    return builder;
+  }
+}
+
+// Yields random cards from a chosen pool
+export function* randomProvider(pool: Card[]) {
+  while (true) {
+    const idx = Math.floor(Math.random() * pool.length);
+    yield pool[idx];
+  }
+}
+
+// Divides a list of card to a map of rarities
+// ie. [ff14, ff16, ff17] => { "C" : ["ff14"], "U": ["ff17"], "R": ["ff16"] }
+export function spanByRarity(pool: Card[]): Record<string, Card[]> {
+  return pool.reduce((map, current) => {
+    if (!(current.Rarity in map)) {
+      map[current.Rarity] = [];
+    }
+    map[current.Rarity].push(current);
+    return map;
+  }, Object.create(null));
+}

src/mlpccg/draft/bot.ts

@@ -0,0 +1,18 @@
+import { Card } from "@/mlpccg";
+import { SessionPlayer } from "./session";
+
+export class DraftBot {
+  assign(player: SessionPlayer) {
+    player.on("available-picks", cards => {
+      const pick = this.pick(cards);
+      // setTimeout hack to avoid handlers being called before the rest of the code
+      setTimeout(() => player.pick(pick.ID), 0);
+    });
+  }
+
+  pick(picks: Card[]): Card {
+    // For now, pick a random card
+    const idx = Math.floor(Math.random() * picks.length);
+    return picks[idx];
+  }
+}

src/mlpccg/draft/cube.ts

@@ -0,0 +1,48 @@
+import { Card, cardFromIDs } from "@/mlpccg";
+import { PackSchema } from "./types";
+import axios from "axios";
+
+export class Cube {
+  private pool: Card[];
+
+  constructor(pool: Card[]) {
+    this.pool = pool;
+  }
+
+  schema(): PackSchema {
+    return {
+      slots: [
+        {
+          amount: 15,
+          provider: this.provider(),
+          alternate: []
+        }
+      ]
+    };
+  }
+
+  *provider() {
+    while (this.pool.length > 0) {
+      const idx = Math.floor(Math.random() * this.pool.length);
+      const card = this.pool.splice(idx, 1);
+      yield card[0];
+    }
+  }
+
+  static async fromCardIDs(cardIDs: string[]): Promise<Cube> {
+    const cards = await cardFromIDs(cardIDs);
+    return new this(cards);
+  }
+
+  static async fromList(list: string): Promise<Cube> {
+    const ids = list.split("\n").map(x => x.trim());
+    return await this.fromCardIDs(ids);
+  }
+
+  static async fromURL(url: string) {
+    const res = await axios(url, {
+      responseType: "text"
+    });
+    return await this.fromList(res.data);
+  }
+}

src/mlpccg/draft/i8pcube.ts

@@ -0,0 +1,81 @@
+import { Card, cardFromIDs } from "@/mlpccg";
+import {
+  PackSchema,
+  I8PCubeSchema,
+  I8PPackSchema,
+  I8PFileSchema,
+  DraftSchema
+} from "./types";
+import axios from "axios";
+import { PackBuilder } from "./booster";
+
+export class I8PCube {
+  private pools: Record<string, Card[]>;
+  private packschema: I8PPackSchema[];
+  private problemCount: number;
+
+  constructor(cubefile: I8PCubeSchema) {
+    this.pools = cubefile.Cards;
+    this.packschema = cubefile.Schema;
+    this.problemCount = cubefile.ProblemPackSize;
+  }
+
+  schema(): DraftSchema {
+    return {
+      boosters: {
+        main: 4,
+        problem: 1
+      },
+      factories: {
+        main: new PackBuilder({
+          slots: this.packschema.map(s => ({
+            amount: s.Amount,
+            provider: this.provider(s.Type),
+            alternate: []
+          }))
+        }),
+        problem: new PackBuilder({
+          slots: [
+            {
+              amount: this.problemCount,
+              provider: this.provider("problem"),
+              alternate: []
+            }
+          ]
+        })
+      }
+    };
+  }
+
+  *provider(name: string | "all") {
+    let poolname = name;
+    while (true) {
+      if (name == "all") {
+        const pools = Object.keys(this.pools);
+        const idx = Math.floor(Math.random() * pools.length);
+        poolname = pools[idx];
+      }
+      const pool = this.pools[poolname];
+      if (pool.length <= 0) {
+        return;
+      }
+      const idx = Math.floor(Math.random() * pool.length);
+      const card = pool.splice(idx, 1);
+      yield card[0];
+    }
+  }
+
+  static async fromURL(url: string) {
+    const res = await axios(url);
+    const cubefile = res.data as I8PFileSchema;
+    let cards: Record<string, Card[]> = {};
+    for (const pool in cubefile.Cards) {
+      cards[pool] = await cardFromIDs(cubefile.Cards[pool]);
+    }
+    return new this({
+      Cards: cards,
+      ProblemPackSize: cubefile.ProblemPackSize,
+      Schema: cubefile.Schema
+    });
+  }
+}

src/mlpccg/draft/index.ts

@@ -0,0 +1,5 @@
+export * from "./cube";
+export * from "./booster";
+export * from "./types";
+export * from "./session";
+export * from "./bot";

src/mlpccg/draft/provider.ts

@@ -0,0 +1,34 @@
+import { DraftSchema, Pack } from "./types";
+import { PackBuilder } from "./booster";
+
+export class DraftProvider {
+  private schema: DraftSchema;
+
+  constructor(schema: DraftSchema) {
+    this.schema = schema;
+  }
+
+  getPacks(): Pack[] {
+    let out = [];
+    for (const boosterSlot in this.schema.boosters) {
+      const amount = this.schema.boosters[boosterSlot];
+      const factory = this.schema.factories[boosterSlot];
+      if (!factory) {
+        throw new Error(
+          `booster type ${boosterSlot} was referenced in schema but was not provided a builder`
+        );
+      }
+      for (let i = 0; i < amount; i++) {
+        out.push(factory.buildPack());
+      }
+    }
+    return out;
+  }
+
+  static set(factory: PackBuilder, amount: number): DraftProvider {
+    return new DraftProvider({
+      boosters: { normal: amount },
+      factories: { normal: factory }
+    });
+  }
+}

src/mlpccg/draft/session.ts

@@ -0,0 +1,262 @@
+import { PackBuilder, Cube, DraftOptions } from ".";
+import EventEmitter from "eventemitter3";
+import { Card } from "@/mlpccg";
+import { Pack, Direction } from "./types";
+import { DraftProvider } from "./provider";
+import { DraftBot } from "./bot";
+import { I8PCube } from "./i8pcube";
+
+export class Session extends EventEmitter {
+  private options: DraftOptions;
+  private provider: DraftProvider;
+  private pod: SessionPlayer[] = [];
+  private players: string[] = [];
+  private pending: number[] = [];
+  private assigned: boolean = false;
+  private direction: Direction = "cw";
+
+  constructor(options: DraftOptions, provider: DraftProvider) {
+    super();
+    this.options = options;
+    this.provider = provider;
+    this.pod = new Array(options.players).fill(0).map((x, i) => {
+      const player = new SessionPlayer(provider.getPacks());
+      player.on("pick", this.picked.bind(this, i));
+      return player;
+    });
+    // Populate prev/next references
+    this.pod.forEach((val, i) => {
+      if (i > 0) {
+        val.prev = this.pod[i - 1];
+      } else {
+        val.prev = this.pod[this.pod.length - 1];
+      }
+      if (i < this.pod.length - 1) {
+        val.next = this.pod[i + 1];
+      } else {
+        val.next = this.pod[0];
+      }
+    });
+  }
+
+  public assign(
+    players: string[],
+    assignFn: (name: string, instance: SessionPlayer) => void
+  ) {
+    // Figure out how many players there are vs spots to be filled
+    this.players = players;
+    const spots = this.options.players;
+    const playerNum = players.length;
+    if (playerNum > spots) {
+      throw new Error("too many players in the pod");
+    }
+
+    if (playerNum < 1) {
+      throw new Error("not enough players");
+    }
+
+    // Place players in the pod
+    switch (this.options.spacing) {
+      case "evenly":
+        const playerRatio = spots / playerNum;
+        let i = 0;
+        for (const player of players) {
+          const pos = Math.floor(playerRatio * i);
+          this.pod[pos].name = player;
+          assignFn(player, this.pod[pos]);
+          i += 1;
+        }
+        break;
+      case "randomly":
+        for (const player of players) {
+          while (true) {
+            const idx = Math.floor(Math.random() * spots);
+            if (this.pod[idx].name == "") {
+              this.pod[idx].name = player;
+              assignFn(name, this.pod[idx]);
+              break;
+            }
+          }
+        }
+        break;
+    }
+
+    // All the non-assigned places go to bots!
+    this.pod.forEach(p => {
+      if (p.name == "") {
+        p.name = "bot";
+        const bot = new DraftBot();
+        bot.assign(p);
+      }
+    });
+
+    this.assigned = true;
+  }
+
+  public start() {
+    if (!this.assigned) {
+      throw new Error("Must assign players first (see assign())");
+    }
+    this.emit("start", this.order);
+    this.nextPack();
+  }
+
+  public get order(): string[] {
+    return this.pod.map(p => p.name);
+  }
+
+  private picked(
+    playerIndex: number,
+    _card: string,
+    lastPick: boolean,
+    lastPack: boolean
+  ) {
+    if (!this.pending.includes(playerIndex)) {
+      // Uh oh.
+      throw new Error(
+        `unexpected pick: player "${this.pod[playerIndex].name}" already picked their card`
+      );
+    }
+    const idx = this.pending.indexOf(playerIndex);
+    this.pending.splice(idx, 1);
+
+    this.emit("player-pick", this.pod[playerIndex].name);
+
+    // Don't continue unless everyone picked their card
+    if (this.pending.length > 0) {
+      return;
+    }
+
+    // Was this the last pick for this round of packs?
+    if (lastPick) {
+      // Was the it the last pack?
+      if (lastPack) {
+        this.emit("draft-over");
+        this.pod.forEach(p => p.emit("your-picks", p.picks));
+        return;
+      }
+      this.nextPack();
+      return;
+    }
+
+    // Pass packs between players for next pick
+    this.resetPending();
+    this.pod.forEach(p => p.sendPack(this.direction));
+    this.emit("next-pick");
+  }
+
+  private nextPack() {
+    this.resetPending();
+    this.flipOrder();
+    this.pod.forEach(p => p.nextPack());
+    this.emit("next-pack");
+  }
+
+  private resetPending() {
+    this.pending = this.pod.map((_, i) => i);
+  }
+
+  private flipOrder() {
+    if (this.direction == "cw") {
+      this.direction = "ccw";
+    } else {
+      this.direction = "cw";
+    }
+  }
+
+  static async create(options: DraftOptions): Promise<Session> {
+    switch (options.source) {
+      case "set": {
+        const factory = await PackBuilder.fromSet(options.set);
+        const provider = DraftProvider.set(factory, options.packs);
+        return new Session(options, provider);
+      }
+      case "block":
+        throw new Error("not implemented");
+      case "cube": {
+        const cube = await Cube.fromURL(options.url);
+        const factory = new PackBuilder(cube.schema());
+        const provider = DraftProvider.set(factory, options.packs);
+        return new Session(options, provider);
+      }
+      case "i8pcube":
+        const cube = await I8PCube.fromURL(options.url);
+        const provider = new DraftProvider(cube.schema());
+        return new Session(options, provider);
+      default:
+        throw new Error("Unknown draft source");
+    }
+  }
+}
+
+export class SessionPlayer extends EventEmitter {
+  public name: string = "";
+  public currentPack?: Pack;
+  public picks: Pack;
+  public packs: Pack[];
+  public toSend: Pack | null = null;
+  public next?: SessionPlayer;
+  public prev?: SessionPlayer;
+  public ready: boolean = false;
+
+  constructor(packs: Pack[]) {
+    super();
+    this.packs = packs;
+    this.picks = [];
+  }
+
+  public pick(card: string) {
+    if (!this.ready) {
+      throw new Error("not ready to pick");
+    }
+    if (!this.currentPack) {
+      throw new Error("no pack to pick from");
+    }
+    const idx = this.currentPack.findIndex(c => c.ID == card);
+    if (idx < 0) {
+      throw new Error("card not in available picks");
+    }
+    const pick = this.currentPack.splice(idx, 1);
+    this.picks.push(pick[0]);
+    this.toSend = this.currentPack;
+    this.ready = false;
+
+    this.emit("pick", card, this.currentPack.length < 1, this.packs.length < 1);
+  }
+
+  public sendPack(direction: Direction) {
+    if (!this.toSend) {
+      throw new Error("no pack to pass");
+    }
+    if (this.toSend.length < 1) {
+      throw new Error("empty pack");
+    }
+    if (direction == "cw") {
+      if (!this.next) {
+        throw new Error("no player to pass cards to");
+      }
+      this.next.receivePack(this.toSend);
+    } else {
+      if (!this.prev) {
+        throw new Error("no player to pass cards to");
+      }
+      this.prev.receivePack(this.toSend);
+    }
+    this.toSend = null;
+  }
+
+  public receivePack(cards: Pack) {
+    this.currentPack = cards;
+    this.ready = true;
+    this.emit("available-picks", cards);
+  }
+
+  public nextPack() {
+    // Open new pack
+    const newPack = this.packs.shift();
+    if (!newPack) {
+      throw new Error("no packs left");
+    }
+    this.receivePack(newPack);
+  }
+}

src/mlpccg/draft/types.ts

@@ -0,0 +1,90 @@
+import { Card } from "@/mlpccg";
+import { PackBuilder } from "./booster";
+
+export type Provider = Iterator<Card>;
+
+export type Pack = Card[];
+
+export interface PackSchema {
+  slots: PackSlot[];
+}
+
+export interface PackSlot {
+  amount: number;
+  provider: Provider;
+  alternate: AlternateProvider[];
+}
+
+export interface AlternateProvider {
+  probability: number;
+  provider: Provider;
+}
+
+export interface SetDraftOptions {
+  source: "set";
+  set: string;
+}
+
+export interface BlockDraftOptions {
+  source: "block";
+  block: string;
+}
+
+export interface CubeDraftOptions {
+  source: "cube";
+  url: string;
+}
+
+export interface I8PCubeDraftOptions {
+  source: "i8pcube";
+  url: string;
+}
+
+export interface LimitedBoosterDraft {
+  type: "booster-draft";
+  packs: number;
+}
+
+export interface LimitedSealedDraft {
+  type: "sealed";
+  packs: number;
+}
+
+export type LimitedGameType = LimitedBoosterDraft | LimitedSealedDraft;
+
+export type DraftType =
+  | SetDraftOptions
+  | BlockDraftOptions
+  | CubeDraftOptions
+  | I8PCubeDraftOptions;
+
+export interface SessionOptions {
+  players: number;
+  spacing: "evenly" | "randomly";
+}
+
+export type DraftOptions = SessionOptions & LimitedGameType & DraftType;
+
+export interface DraftSchema {
+  boosters: Record<string, number>;
+  factories: Record<string, PackBuilder>;
+}
+
+export type Direction = "cw" | "ccw";
+
+export interface I8PCubeSchema {
+  Schema: I8PPackSchema[];
+  ProblemPackSize: number;
+  Cards: Record<string, Card[]>;
+}
+
+export interface I8PFileSchema {
+  Schema: I8PPackSchema[];
+  ProblemPackSize: number;
+  Cards: Record<string, string[]>;
+}
+
+export interface I8PPackSchema {
+  Amount: number;
+  Type: string;
+}

src/mlpccg/types.ts

@@ -2,7 +2,7 @@ export type Rarity = "C" | "U" | "R" | "SR" | "UR" | "RR";
 
 export type PowerRequirement = { [key: string]: number };
 
-export interface StoredImages {
+export interface StoredImage {
   id: string;
   image: Blob;
 }

src/testing/IDBShim.ts

@@ -0,0 +1,11 @@
+import Dexie from "dexie";
+
+let init = false;
+
+export function setupIDBShim() {
+  if (!init) {
+    const setGlobalVars = require("indexeddbshim");
+    setGlobalVars(Dexie.dependencies);
+    init = true;
+  }
+}

src/testing/index.ts

@@ -2,3 +2,4 @@ export * from "./MockDataConnection";
 export * from "./MockPeer";
 export * from "./MockHelper";
 export * from "./EventHook";
+export * from "./IDBShim";

src/tests/unit/database.spec.ts

@@ -1,7 +1,7 @@
 import { loadSets, getCards, Database, initDB, cardFullName } from "@/mlpccg";
-import Dexie from "dexie";
-const setGlobalVars = require("indexeddbshim");
-setGlobalVars(Dexie.dependencies);
+import { setupIDBShim } from "@/testing";
+
+setupIDBShim();
 
 describe("mlpccg/Database", () => {
   beforeAll(async () => {

src/tests/unit/draft.spec.ts

@@ -0,0 +1,131 @@
+import { setupIDBShim, EventHook } from "@/testing";
+import { initDB, loadSets, Database, Card } from "@/mlpccg";
+import {
+  PackBuilder,
+  spanByRarity,
+  Cube,
+  Session,
+  DraftOptions
+} from "@/mlpccg/draft";
+
+setupIDBShim();
+
+const testSessionOptions: DraftOptions = {
+  type: "booster-draft",
+  source: "set",
+  set: "FF",
+  packs: 2,
+  players: 4,
+  spacing: "evenly"
+};
+
+describe("mlpccg/draft", () => {
+  beforeAll(async () => {
+    jest.setTimeout(15000);
+    initDB();
+    await loadSets();
+  });
+
+  test("Set booster packs are generated correctly", async () => {
+    expect(Database).toBeTruthy();
+    const builder = await PackBuilder.fromSet("FF");
+    const pack = builder.buildPack();
+    // Check pack size
+    expect(pack).toHaveLength(12);
+    const rarities = spanByRarity(pack);
+    // Check pack distribution
+    expect(rarities["R"]).toHaveLength(1);
+    expect(rarities["U"]).toHaveLength(3);
+  });
+
+  test("Cube can load a newline separated card list", async () => {
+    expect(Database).toBeTruthy();
+    const cubeCards = ["ff10", "ff11", "ff12", "ff13", "ff14", "ff15"];
+    const cubeList = cubeCards.join("\n");
+    const cube = await Cube.fromList(cubeList);
+    const builder = new PackBuilder(cube.schema());
+    const pack = builder.buildPack();
+    // Pack size should only be 6, since there are not enough cards for a 12 cards pack
+    expect(pack).toHaveLength(6);
+    // Make sure pack has ALL the cards from the pool, no duplicates
+    const sortedPack = pack.map(c => c.ID).sort();
+    expect(sortedPack).toEqual(cubeCards);
+  });
+
+  test("A session can be initialized", async () => {
+    expect(Database).toBeTruthy();
+    const session = await Session.create(testSessionOptions);
+    const hook = new EventHook();
+    hook.hookEmitter(session, "start", "session-start");
+    session.assign(["test1", "test2"], () => {
+      // Do nothing
+    });
+    session.start();
+    await hook.expect("session-start");
+  });
+
+  test("Players receive pick events and can pick cards", async () => {
+    expect(Database).toBeTruthy();
+    const session = await Session.create(testSessionOptions);
+    const hook = new EventHook();
+    hook.hookEmitter(session, "start", "session-start");
+    hook.hookEmitter(session, "next-pack", "session-new-pack");
+    hook.hookEmitter(session, "next-pick", "session-new-pick");
+    hook.hookEmitter(session, "player-pick", "session-picked");
+    hook.hookEmitter(session, "draft-over", "session-done");
+    session.assign(["test1", "test2"], (name, player) => {
+      player.on("available-picks", cards => {
+        // setTimeout hack to avoid handlers being called before the rest of the code
+        setTimeout(() => player.pick(cards[0].ID), 0);
+      });
+    });
+    session.start();
+    await hook.expect("session-start");
+    for (let i = 0; i < testSessionOptions.packs; i++) {
+      await hook.expect("session-new-pack");
+      for (let j = 0; j < 12; j++) {
+        for (let p = 0; p < testSessionOptions.players; p++) {
+          await hook.expect("session-picked");
+        }
+        if (i < testSessionOptions.packs - 1) {
+          await hook.expect("session-new-pick");
+        }
+      }
+    }
+    await hook.expect("session-done");
+  });
+
+  test("Sessions can load and draft I8PCube files", async () => {
+    expect(Database).toBeTruthy();
+    const session = await Session.create({
+      type: "booster-draft",
+      source: "i8pcube",
+      url: "https://mcg.zyg.ovh/cubes/hamchacube.json",
+      packs: 4,
+      players: 4,
+      spacing: "evenly"
+    });
+    const hook = new EventHook();
+    hook.hookEmitter(session, "start", "session-start");
+    session.assign(["test1"], (_, player) => {
+      hook.hookEmitter(player, "available-picks", "got-cards");
+    });
+    session.start();
+    await hook.expect("session-start");
+    await hook.expect("got-cards", 1000, (cards: Card[]) => {
+      expect(cards).toHaveLength(12);
+      // Check for 2 or more multicolor cards
+      const multicolor = cards.filter(
+        c =>
+          c.Element.length > 1 ||
+          (c.Requirement && Object.keys(c.Requirement).length > 1)
+      );
+      expect(multicolor.length).toBeGreaterThanOrEqual(2);
+      // Check for 2 or more entry cards
+      const entry = cards.filter(
+        c => !c.Requirement || c.Requirement.length < 1
+      );
+      expect(entry.length).toBeGreaterThanOrEqual(2);
+    });
+  });
+});