fix(core): loyalty card joker setting mult to 0 when inactive

Turns out multiplying a number by 0 results in 0. 🤡

Fixes #18.

src/lib/calculateScore.test.ts

@@ -50,6 +50,7 @@ describe('calculateScore', async () => {
 		(await import('./test-files/034.ts')).default('Run from 2024-04-09 19:20 UTC'),
 		(await import('./test-files/035.ts')).default('https://www.youtube.com/watch?v=hcZF7NJGuPE'),
 		(await import('./test-files/036.ts')).default('Regression test for #17'),
+		(await import('./test-files/037.ts')).default('Regression test for #18'),
 	])('$message', ({ initialState, expected }) => {
 		const score = calculateScore(getState(initialState))
 

src/lib/data.ts

@@ -354,7 +354,7 @@ export const JOKER_DEFINITIONS: Record<JokerName, JokerDefinition> = {
 		hasIsActiveInput: true,
 		effect ({ score, trigger }) {
 			score.push({
-				multiplier: ['*', this.active ? 4 : 0],
+				multiplier: ['*', this.active ? 4 : 1],
 				phase: 'jokers',
 				joker: this,
 				trigger,

src/lib/test-files/037.ts

@@ -0,0 +1,26 @@
+import type { TestCase } from '#lib/calculateScore.test.ts'
+
+export default (message: string): TestCase => {
+	return {
+		message,
+		initialState: {
+			cards: [
+				{ played: true, rank: 'Queen', suit: 'Diamonds' },
+			],
+			jokers: [
+				{ name: 'Loyalty Card', active: false },
+			],
+		},
+		expected: {
+			hand: 'High Card',
+			scoringCards: [
+				{ rank: 'Queen', suit: 'Diamonds' },
+			],
+			scores: [
+				{ score: '15', formattedScore: '15', luck: 'none' },
+				{ score: '15', formattedScore: '15', luck: 'average' },
+				{ score: '15', formattedScore: '15', luck: 'all' },
+			],
+		},
+	}
+}