Added tests for the arena flyout + improved type inference on tags

src/data/positional-tags/load-positional-tag.ts

@@ -42,7 +42,7 @@ const posTagConstructorMap = Object.freeze({
   [PositionalTagType.WISH]: WishTag,
 }) satisfies {
   // NB: This `satisfies` block ensures that all tag types have corresponding entries in the map.
-  [k in PositionalTagType]: Constructor<PositionalTag & { tagType: k }>;
+  [k in PositionalTagType]: Constructor<PositionalTag & { readonly tagType: k }>;
 };
 
 /** Type mapping positional tag types to their constructors. */
@@ -59,11 +59,12 @@ type posTagParamMap = {
 };
 
 /**
- * Type mapping all positional tag types to their constructors' parameters, alongside the `tagType` selector.
+ * Type mapping all positional tag types to their constructors' parameters, alongside the `tagType` selector. \
  * Equivalent to their serialized representations.
+ * @interface
  */
 export type serializedPosTagMap = {
-  [k in PositionalTagType]: posTagParamMap[k] & { tagType: k };
+  [k in PositionalTagType]: posTagParamMap[k] & Pick<posTagInstanceMap[k], "tagType">;
 };
 
 /** Union type containing all serialized {@linkcode PositionalTag}s. */

src/data/positional-tags/positional-tag.ts

@@ -7,7 +7,7 @@ import { allMoves } from "#data/data-lists";
 import type { BattlerIndex } from "#enums/battler-index";
 import type { MoveId } from "#enums/move-id";
 import { MoveUseMode } from "#enums/move-use-mode";
-import { PositionalTagType } from "#enums/positional-tag-type";
+import type { PositionalTagType } from "#enums/positional-tag-type";
 import type { Pokemon } from "#field/pokemon";
 import i18next from "i18next";
 
@@ -30,7 +30,7 @@ export interface PositionalTagBaseArgs {
   /**
    * The {@linkcode BattlerIndex} targeted by this effect.
    */
-  targetIndex: BattlerIndex;
+  readonly targetIndex: BattlerIndex;
 }
 
 /**
@@ -39,7 +39,7 @@ export interface PositionalTagBaseArgs {
  * Multiple tags of the same kind can stack with one another, provided they are affecting different targets.
  */
 export abstract class PositionalTag implements PositionalTagBaseArgs {
-  /** This tag's {@linkcode PositionalTagType | type} */
+  /** This tag's {@linkcode PositionalTagType | type}. */
   public abstract readonly tagType: PositionalTagType;
   // These arguments have to be public to implement the interface, but are functionally private
   // outside this and the tag manager.
@@ -76,9 +76,9 @@ interface DelayedAttackArgs extends PositionalTagBaseArgs {
   /**
    * The {@linkcode Pokemon.id | PID} of the {@linkcode Pokemon} having created this effect.
    */
-  sourceId: number;
+  readonly sourceId: number;
   /** The {@linkcode MoveId} that created this attack. */
-  sourceMove: MoveId;
+  readonly sourceMove: MoveId;
 }
 
 /**
@@ -87,7 +87,7 @@ interface DelayedAttackArgs extends PositionalTagBaseArgs {
  * triggering against a certain slot after the turn count has elapsed.
  */
 export class DelayedAttackTag extends PositionalTag implements DelayedAttackArgs {
-  public override readonly tagType = PositionalTagType.DELAYED_ATTACK;
+  public declare readonly tagType: PositionalTagType.DELAYED_ATTACK;
   public readonly sourceMove: MoveId;
   public readonly sourceId: number;
 
@@ -133,16 +133,16 @@ export class DelayedAttackTag extends PositionalTag implements DelayedAttackArgs
 /** Interface containing arguments used to construct a {@linkcode WishTag}. */
 interface WishArgs extends PositionalTagBaseArgs {
   /** The amount of {@linkcode Stat.HP | HP} to heal; set to 50% of the user's max HP during move usage. */
-  healHp: number;
+  readonly healHp: number;
   /** The name of the {@linkcode Pokemon} having created the tag. */
-  pokemonName: string;
+  readonly pokemonName: string;
 }
 
 /**
  * Tag to implement {@linkcode MoveId.WISH | Wish}.
  */
 export class WishTag extends PositionalTag implements WishArgs {
-  public override readonly tagType = PositionalTagType.WISH;
+  public declare readonly tagType: PositionalTagType.WISH;
 
   public readonly pokemonName: string;
   public readonly healHp: number;

src/enums/arena-event-type.ts

@@ -35,4 +35,4 @@ export type ArenaEventType = ObjectValues<typeof ArenaEventType>;
   {@linkcode TerrainType}
   {@linkcode PositionalTag}
   {@linkcode ArenaTag}
-*/
+*/

src/ui/arena-flyout.ts

@@ -12,7 +12,7 @@ import { ArenaTagType } from "#enums/arena-tag-type";
 import { BattlerIndex } from "#enums/battler-index";
 import { FieldPosition } from "#enums/field-position";
 import { MoveId } from "#enums/move-id";
-import { PositionalTagType } from "#enums/positional-tag-type";
+import type { PositionalTagType } from "#enums/positional-tag-type";
 import { TextStyle } from "#enums/text-style";
 import { WeatherType } from "#enums/weather-type";
 import type {
@@ -85,38 +85,6 @@ interface PositionalTagInfo {
 
 // #endregion interfaces
 
-// #region String functions
-
-/**
- * Return the localized text for a given effect.
- * @param text - The raw text of the effect; assumed to be in `UPPER_SNAKE_CASE` from a reverse mapping.
- * @returns The localized text for the effect.
- */
-export function localizeEffectName(text: string): string {
-  const effectName = toCamelCase(text);
-  const i18nKey = `arenaFlyout:${effectName}`;
-  const resultName = i18next.t(i18nKey);
-  return resultName;
-}
-
-/**
- * Return the localized name of a given {@linkcode PositionalTag}.
- * @param tag - The raw serialized data for the given tag
- * @returns The localized text to be displayed on-screen.
- * @package
- */
-export function getPositionalTagDisplayName(tag: SerializedPositionalTag): string {
-  let tagName: string;
-  if ("sourceMove" in tag) {
-    // Delayed attacks will use the source move's name; other effects rely on type
-    tagName = MoveId[tag.sourceMove];
-  } else {
-    tagName = PositionalTagType[tag.tagType];
-  }
-
-  return localizeEffectName(tagName);
-}
-
 /**
  * Class to display and update the on-screen arena flyout.
  */
@@ -330,7 +298,7 @@ export class ArenaFlyout extends Phaser.GameObjects.Container {
    * @param event - The {@linkcode ArenaTagAddedEvent} having been emitted
    */
   private onArenaTagAdded(event: ArenaTagAddedEvent): void {
-    const name = localizeEffectName(ArenaTagType[event.tagType]);
+    const name = this.localizeEffectName(ArenaTagType[event.tagType]);
     // Ternary used to avoid unneeded find
     const existingTrapTag =
       event.trapLayers !== undefined
@@ -389,7 +357,7 @@ export class ArenaFlyout extends Phaser.GameObjects.Container {
    * @param event - The {@linkcode PositionalTagAddedEvent} having been emitted
    */
   private onPositionalTagAdded(event: PositionalTagAddedEvent): void {
-    const name = getPositionalTagDisplayName(event.tag);
+    const name = this.getPositionalTagDisplayName(event.tag);
 
     this.positionalTags.push({
       name,
@@ -433,7 +401,7 @@ export class ArenaFlyout extends Phaser.GameObjects.Container {
     }
 
     this.weatherInfo = {
-      name: localizeEffectName(WeatherType[event.weatherType]),
+      name: this.localizeEffectName(WeatherType[event.weatherType]),
       maxDuration: event.duration,
       duration: event.duration,
       weatherType: event.weatherType,
@@ -455,7 +423,7 @@ export class ArenaFlyout extends Phaser.GameObjects.Container {
     }
 
     this.terrainInfo = {
-      name: localizeEffectName(TerrainType[event.terrainType]),
+      name: this.localizeEffectName(TerrainType[event.terrainType]),
       maxDuration: event.duration,
       duration: event.duration,
       terrainType: event.terrainType,
@@ -549,7 +517,7 @@ export class ArenaFlyout extends Phaser.GameObjects.Container {
     }
 
     const targetPos = battlerIndexToFieldPosition(info.targetIndex);
-    const posText = localizeEffectName(FieldPosition[targetPos]);
+    const posText = this.localizeEffectName(FieldPosition[targetPos]);
 
     // Ex: "Future Sight  (Center, 2)"
     return `${info.name}  (${posText}, ${info.duration})\n`;
@@ -606,6 +574,39 @@ export class ArenaFlyout extends Phaser.GameObjects.Container {
   }
 
   // # endregion Text display functions
+
+  // #region Utilities
+
+  /**
+   * Return the localized text for a given effect.
+   * @param text - The raw text of the effect; assumed to be in `UPPER_SNAKE_CASE` from a reverse mapping.
+   * @returns The localized text for the effect.
+   */
+  private localizeEffectName(text: string): string {
+    const effectName = toCamelCase(text);
+    const i18nKey = `arenaFlyout:${effectName}`;
+    const resultName = i18next.t(i18nKey);
+    return resultName;
+  }
+
+  /**
+   * Return the localized name of a given {@linkcode PositionalTag}.
+   * @param tag - The raw serialized data for the given tag
+   * @returns The localized text to be displayed on-screen.
+   */
+  private getPositionalTagDisplayName(tag: SerializedPositionalTag): string {
+    let tagName: string;
+    if ("sourceMove" in tag) {
+      // Delayed attacks will use the source move's name; other effects use type directly
+      tagName = MoveId[tag.sourceMove];
+    } else {
+      tagName = tag.tagType;
+    }
+
+    return this.localizeEffectName(tagName);
+  }
+
+  // #endregion Utility emthods
 }
 
 /**
@@ -614,22 +615,6 @@ export class ArenaFlyout extends Phaser.GameObjects.Container {
  * @returns The resultant field position.
  */
 function battlerIndexToFieldPosition(index: BattlerIndex): FieldPosition {
-  let pos: FieldPosition;
-  switch (index) {
-    case BattlerIndex.ATTACKER:
-      throw new Error("Cannot convert BattlerIndex.ATTACKER to a field position!");
-    case BattlerIndex.PLAYER:
-    case BattlerIndex.ENEMY:
-      pos = FieldPosition.LEFT;
-      break;
-    case BattlerIndex.PLAYER_2:
-    case BattlerIndex.ENEMY_2:
-      pos = FieldPosition.RIGHT;
-      break;
-  }
-  // In single battles, left positions become center
-  if (!globalScene.currentBattle.double && pos === FieldPosition.LEFT) {
-    pos = FieldPosition.CENTER;
-  }
+  const pos = globalScene.getField()[index]?.fieldPosition;
   return pos;
 }

test/test-utils/test-utils.ts

@@ -1,13 +1,12 @@
 import i18next, { type ParseKeys } from "i18next";
-import { vi } from "vitest";
+import { type MockInstance, vi } from "vitest";
 
 /**
- * Sets up the i18next mock.
- * Includes a i18next.t mocked implementation only returning the raw key (`(key) => key`)
+ * Mock i18next's {@linkcode t} function to only produce the raw key.
  *
- * @returns A spy/mock of i18next
+ * @returns A {@linkcode MockInstance} for `i18next.t`
  */
-export function mockI18next() {
+export function mockI18next(): MockInstance<(typeof i18next)["t"]> {
   return vi.spyOn(i18next, "t").mockImplementation((key: ParseKeys) => key);
 }
 

test/types/positional-tags.test-d.ts

@@ -1,25 +1,24 @@
 import type { SerializedPositionalTag, serializedPosTagMap } from "#data/positional-tags/load-positional-tag";
 import type { DelayedAttackTag, WishTag } from "#data/positional-tags/positional-tag";
 import type { PositionalTagType } from "#enums/positional-tag-type";
-import type { Mutable, NonFunctionPropertiesRecursive } from "#types/type-helpers";
+import type { NonFunctionPropertiesRecursive } from "#types/type-helpers";
 import { describe, expectTypeOf, it } from "vitest";
 
-// Needed to get around properties being readonly in certain classes
-type NonFunctionMutable<T> = Mutable<NonFunctionPropertiesRecursive<T>>;
-
 describe("serializedPositionalTagMap", () => {
   it("should contain representations of each tag's serialized form", () => {
     expectTypeOf<serializedPosTagMap[PositionalTagType.DELAYED_ATTACK]>().branded.toEqualTypeOf<
-      NonFunctionMutable<DelayedAttackTag>
+      NonFunctionPropertiesRecursive<DelayedAttackTag>
+    >();
+    expectTypeOf<serializedPosTagMap[PositionalTagType.WISH]>().branded.toEqualTypeOf<
+      NonFunctionPropertiesRecursive<WishTag>
     >();
-    expectTypeOf<serializedPosTagMap[PositionalTagType.WISH]>().branded.toEqualTypeOf<NonFunctionMutable<WishTag>>();
   });
 });
 
 describe("SerializedPositionalTag", () => {
   it("should accept a union of all serialized tag forms", () => {
     expectTypeOf<SerializedPositionalTag>().branded.toEqualTypeOf<
-      NonFunctionMutable<DelayedAttackTag> | NonFunctionMutable<WishTag>
+      NonFunctionPropertiesRecursive<DelayedAttackTag> | NonFunctionPropertiesRecursive<WishTag>
     >();
   });
   it("should accept a union of all unserialized tag forms", () => {

test/ui/flyouts/arena-flyout.test.ts

@@ -0,0 +1,92 @@
+import type { SerializedPositionalTag } from "#data/positional-tags/load-positional-tag";
+import { AbilityId } from "#enums/ability-id";
+import { BattlerIndex } from "#enums/battler-index";
+import { MoveId } from "#enums/move-id";
+import { PositionalTagType } from "#enums/positional-tag-type";
+import { SpeciesId } from "#enums/species-id";
+import { GameManager } from "#test/test-utils/game-manager";
+import { mockI18next } from "#test/test-utils/test-utils";
+import type { ArenaFlyout } from "#ui/arena-flyout";
+import type i18next from "i18next";
+import Phaser from "phaser";
+import { afterAll, beforeAll, beforeEach, describe, expect, it, type MockInstance, vi } from "vitest";
+
+describe("UI - Arena Flyout", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+  let flyout: ArenaFlyout;
+  let tSpy: MockInstance<(typeof i18next)["t"]>;
+
+  beforeAll(async () => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+
+    game = new GameManager(phaserGame);
+    game.override
+      .ability(AbilityId.BALL_FETCH)
+      .battleStyle("double")
+      .criticalHits(false)
+      .enemySpecies(SpeciesId.MAGIKARP)
+      .enemyAbility(AbilityId.BALL_FETCH)
+      .enemyMoveset(MoveId.SPLASH)
+      .startingLevel(100)
+      .enemyLevel(100);
+
+    await game.classicMode.startBattle([SpeciesId.FEEBAS]);
+
+    flyout = game.scene.arenaFlyout;
+  });
+
+  beforeEach(() => {
+    // Reset i18n mock before each test
+    tSpy = mockI18next();
+  });
+
+  afterAll(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  describe("localizeEffectName", () => {
+    it("should retrieve locales from an effect name", () => {
+      const name = flyout["localizeEffectName"]("STEALTH_ROCK");
+      expect(name).toBe("arenaFlyout:stealthRock");
+      expect(tSpy).toHaveBeenCalledExactlyOnceWith("arenaFlyout:stealthRock");
+    });
+  });
+
+  // Helper type to get around unexportedness
+  type posTagInfo = (typeof flyout)["positionalTags"][number];
+
+  describe("getPositionalTagDisplayName", () => {
+    it.each([
+      { tag: { tagType: PositionalTagType.WISH }, name: "arenaFlyout:wish" },
+      {
+        tag: { sourceMove: MoveId.FUTURE_SIGHT, tagType: PositionalTagType.DELAYED_ATTACK },
+        name: "arenaFlyout:futureSight",
+      },
+      {
+        tag: { sourceMove: MoveId.DOOM_DESIRE, tagType: PositionalTagType.DELAYED_ATTACK },
+        name: "arenaFlyout:doomDesire",
+      },
+    ])("should get the name of a Positional Tag", ({ tag, name }) => {
+      const got = flyout["getPositionalTagDisplayName"](tag as SerializedPositionalTag);
+      expect(got).toBe(name);
+    });
+  });
+
+  describe("getPosTagText", () => {
+    it.each<{ tag: Pick<posTagInfo, "duration" | "name" | "targetIndex">; output: string; double?: boolean }>([
+      { tag: { duration: 2, name: "Wish", targetIndex: BattlerIndex.PLAYER }, output: "Wish  (2)" },
+      {
+        tag: { duration: 1, name: "Future Sight", targetIndex: BattlerIndex.ENEMY_2 },
+        double: true,
+        output: "Future Sight  (arenaFlyout:right, 1)",
+      },
+    ])("should produce the correct text", ({ tag, output, double = false }) => {
+      vi.spyOn(game.scene.currentBattle, "double", "get").mockReturnValue(double);
+      const text = flyout["getPosTagText"](tag as posTagInfo);
+      expect(text).toBe(output + "\n");
+    });
+  });
+});