test: add RankTracker test

src/RankTracker.test.ts

@@ -1,7 +1,129 @@
 import { RankTracker } from "./RankTracker.ts";
 import { assertEquals } from "../dev_deps.ts";
+import { BattleListNode } from "./types.ts";
+import { base64 } from "../deps.ts";
+import { gameId } from "./utils.ts";
 
-Deno.test("RankTracker", () => {
-  const tracker = new RankTracker();
-  assertEquals(tracker, new RankTracker());
+const INIT_STATE = {
+  gameId: await gameId(genId(0)),
+  rank: "B-",
+  rankPoint: 100,
+};
+
+class TestRankTracker extends RankTracker {
+  testGet() {
+    const { state, deltaMap } = this;
+    return {
+      state,
+      deltaMap,
+    };
+  }
+}
+
+function genId(id: number): string {
+  return base64.encode(
+    `VsHistoryDetail-asdf:asdf:20220101T${
+      id.toString().padStart(6, "0")
+    }_------------------------------------`,
+  );
+}
+
+function genOpenWins(
+  { startId, count, udemae }: {
+    startId: number;
+    count: number;
+    udemae: string;
+  },
+) {
+  const result: BattleListNode[] = [];
+  let id = startId;
+
+  for (let i = 0; i < count; i++) {
+    result.push({
+      id: genId(id),
+      udemae,
+      judgement: "WIN",
+      bankaraMatch: {
+        earnedUdemaePoint: 8,
+      },
+      nextHistoryDetail: null,
+      previousHistoryDetail: null,
+    });
+    id += 1;
+  }
+
+  return result;
+}
+
+Deno.test("RankTracker", async () => {
+  const tracker = new TestRankTracker(INIT_STATE);
+  assertEquals(tracker.testGet(), {
+    state: INIT_STATE,
+    deltaMap: new Map(),
+  });
+
+  const finalState = await tracker.updateState([{
+    bankaraMatchChallenge: null,
+    historyDetails: {
+      nodes: [...genOpenWins({
+        startId: 0,
+        count: 19,
+        udemae: "B-",
+      })].reverse(),
+    },
+  }]);
+
+  assertEquals(tracker.testGet().state, INIT_STATE);
+
+  assertEquals(finalState, {
+    gameId: await gameId(genId(18)),
+    rank: "B-",
+    rankPoint: 244,
+  });
+
+  assertEquals(await tracker.getRankStateById(genId(1)), {
+    gameId: await gameId(genId(1)),
+    rank: "B-",
+    rankPoint: 108,
+  });
+
+  assertEquals(await tracker.getRankStateById(genId(17)), {
+    gameId: await gameId(genId(17)),
+    rank: "B-",
+    rankPoint: 236,
+  });
+
+  tracker.setState(finalState);
+
+  assertEquals(tracker.testGet().state, finalState);
+
+  // history goes too far
+  const finalState2 = await tracker.updateState([{
+    bankaraMatchChallenge: null,
+    historyDetails: {
+      nodes: [...genOpenWins({
+        startId: 30,
+        count: 1,
+        udemae: "B-",
+      })].reverse(),
+    },
+  }]);
+  assertEquals(finalState2, undefined);
+
+  await tracker.updateState([{
+    bankaraMatchChallenge: null,
+    historyDetails: {
+      nodes: [...genOpenWins({
+        startId: 0,
+        count: 30,
+        udemae: "B-",
+      })].reverse(),
+    },
+  }]);
+
+  assertEquals(await tracker.getRankStateById(genId(29)), {
+    gameId: await gameId(genId(29)),
+    rank: "B-",
+    rankPoint: 332,
+  });
 });

src/RankTracker.ts

@@ -143,9 +143,9 @@ const battleTime = (id: string) => {
  */
 export class RankTracker {
   // key: privous game id
-  deltaMap: Map<string, Delta> = new Map();
+  protected deltaMap: Map<string, Delta> = new Map();
 
-  constructor(private state: RankState | undefined) {}
+  constructor(protected state: RankState | undefined) {}
 
   async getRankStateById(id: string): Promise<RankState | undefined> {
     if (!this.state) {