app/index.tsx

@@ -1,12 +1,25 @@
 import React, { useState, useEffect } from "react";
-import { ScrollView, Text, Alert, Button } from "react-native";
+import {
+  ScrollView,
+  Text,
+  Alert,
+  Button,
+  View,
+  StyleSheet,
+  TouchableOpacity,
+} from "react-native";
+import { FontAwesome } from "@expo/vector-icons";
 import PlayerSelector from "@/components/PlayerSelector";
 import BuyInSelector from "@/components/BuyInSelector";
 import ChipsSelector from "@/components/ChipsSelector";
 import ChipDistributionSummary from "@/components/ChipDistributionSummary";
 import ChipDetection from "@/components/ChipDetection";
+import CurrencySelector from "@/components/CurrencySelector";
 import { saveState, loadState } from "@/components/CalculatorState";
-import { savePersistentState, loadPersistentState } from "@/components/PersistentState";
+import {
+  savePersistentState,
+  loadPersistentState,
+} from "@/components/PersistentState";
 
 export enum COLORS {
   "white",
@@ -21,8 +34,9 @@ const IndexScreen: React.FC = () => {
   const [buyInAmount, setBuyInAmount] = useState<number>(20);
   const [numberOfChips, setNumberOfChips] = useState<number>(5);
   const [totalChipsCount, setTotalChipsCount] = useState<number[]>([]);
+  const [selectedCurrency, setSelectedCurrency] = useState<string>("$");
+  const [isSettingsVisible, setIsSettingsVisible] = useState(false);
 
-  // Load persistent data on startup
   useEffect(() => {
     const loadPersistentData = async () => {
       try {
@@ -30,12 +44,13 @@ const IndexScreen: React.FC = () => {
         const savedState = await loadPersistentState();
         if (savedState) {
           console.log("Persistent state restored:", savedState);
-          setPlayerCount(savedState.playerCount);
-          setBuyInAmount(savedState.buyInAmount);
-          setNumberOfChips(savedState.numberOfChips);
-          setTotalChipsCount(savedState.totalChipsCount);
+          setPlayerCount(savedState.playerCount || 2);
+          setBuyInAmount(savedState.buyInAmount || 20);
+          setNumberOfChips(savedState.numberOfChips || 5);
+          setTotalChipsCount(savedState.totalChipsCount || []);
+          setSelectedCurrency(savedState.selectedCurrency || "$");
         } else {
-          console.log("No persistent state found.");
+          console.log("No persistent state found, using defaults.");
         }
       } catch (error) {
         console.error("Error loading persistent state:", error);
@@ -44,14 +59,18 @@ const IndexScreen: React.FC = () => {
     loadPersistentData();
   }, []);
 
-  // Save game state to selected slot
   const handleSave = async (slot: "SLOT1" | "SLOT2") => {
     if (buyInAmount === null) {
       Alert.alert("Error", "Please select a valid buy-in amount");
       return;
     }
-    const state = { playerCount, buyInAmount, numberOfChips, totalChipsCount };
-
+    const state = {
+      playerCount,
+      buyInAmount,
+      numberOfChips,
+      totalChipsCount,
+      selectedCurrency,
+    };
     try {
       await saveState(slot, state);
       await savePersistentState(state);
@@ -63,7 +82,6 @@ const IndexScreen: React.FC = () => {
     }
   };
 
-  // Load game state from selected slot
   const handleLoad = async (slot: "SLOT1" | "SLOT2") => {
     try {
       const loadedState = await loadState(slot);
@@ -72,6 +90,7 @@ const IndexScreen: React.FC = () => {
         setBuyInAmount(loadedState.buyInAmount);
         setNumberOfChips(loadedState.numberOfChips);
         setTotalChipsCount(loadedState.totalChipsCount);
+        setSelectedCurrency(loadedState.selectedCurrency || "$");
         await savePersistentState(loadedState);
         console.log(`Game state loaded from ${slot}:`, loadedState);
         Alert.alert("Success", `State loaded from ${slot}`);
@@ -86,29 +105,95 @@ const IndexScreen: React.FC = () => {
 
   return (
     <ScrollView contentContainerStyle={{ padding: 20, flexGrow: 1 }}>
-      <PlayerSelector playerCount={playerCount} setPlayerCount={setPlayerCount} />
-      <BuyInSelector setBuyInAmount={setBuyInAmount} />
-      <ChipDetection updateChipCount={(chipData) => {
-        const chipCountArray = Object.values(chipData);
-        setTotalChipsCount(chipCountArray);
-      }} />
+      <View style={styles.header}>
+        <TouchableOpacity
+          onPress={() => setIsSettingsVisible(!isSettingsVisible)}
+        >
+          <Text>
+            <FontAwesome name="cog" size={30} color="black" />
+          </Text>
+        </TouchableOpacity>
+      </View>
+
+      {isSettingsVisible && (
+        <View style={styles.settingsContainer}>
+          <CurrencySelector
+            selectedCurrency={selectedCurrency}
+            setSelectedCurrency={setSelectedCurrency}
+          />
+        </View>
+      )}
+
+      <PlayerSelector
+        playerCount={playerCount}
+        setPlayerCount={setPlayerCount}
+      />
+
+      <BuyInSelector
+        selectedCurrency={selectedCurrency}
+        setBuyInAmount={setBuyInAmount}
+      />
+
+      <ChipDetection
+        updateChipCount={(chipData) => {
+          const chipCountArray = Object.values(chipData);
+          setTotalChipsCount(chipCountArray);
+        }}
+      />
+
       <ChipsSelector
         totalChipsCount={totalChipsCount}
         setTotalChipsCount={setTotalChipsCount}
         numberOfChips={numberOfChips}
         setNumberOfChips={setNumberOfChips}
       />
+
       <ChipDistributionSummary
         playerCount={playerCount}
         buyInAmount={buyInAmount}
         totalChipsCount={totalChipsCount}
+        selectedCurrency={selectedCurrency}
       />
-      <Button title="Save to Slot 1" onPress={() => handleSave("SLOT1")} disabled={buyInAmount === null} />
-      <Button title="Save to Slot 2" onPress={() => handleSave("SLOT2")} disabled={buyInAmount === null} />
-      <Button title="Load from Slot 1" onPress={() => handleLoad("SLOT1")} />
-      <Button title="Load from Slot 2" onPress={() => handleLoad("SLOT2")} />
+
+      <View style={styles.buttonContainer}>
+        <Button
+          title="Save to Slot 1"
+          onPress={() => handleSave("SLOT1")}
+          disabled={buyInAmount === null}
+        />
+        <Button
+          title="Save to Slot 2"
+          onPress={() => handleSave("SLOT2")}
+          disabled={buyInAmount === null}
+        />
+        <Button title="Load from Slot 1" onPress={() => handleLoad("SLOT1")} />
+        <Button title="Load from Slot 2" onPress={() => handleLoad("SLOT2")} />
+      </View>
     </ScrollView>
   );
 };
 
-export default IndexScreen;
+const styles = StyleSheet.create({
+  header: {
+    flexDirection: "row",
+    justifyContent: "flex-end",
+    alignItems: "center",
+    marginBottom: 20,
+  },
+  settingsContainer: {
+    marginBottom: 20,
+    padding: 10,
+    backgroundColor: "#f5f5f5",
+    borderRadius: 5,
+  },
+  settingTitle: {
+    fontSize: 18,
+    fontWeight: "bold",
+    marginBottom: 10,
+  },
+  buttonContainer: {
+    marginTop: 20,
+  },
+});
+
+export default IndexScreen;

components/BuyInSelector.tsx

@@ -10,11 +10,15 @@ import { MaterialIcons } from "@expo/vector-icons";
 
 interface BuyInSelectorProps {
   setBuyInAmount: React.Dispatch<React.SetStateAction<number>>;
+  selectedCurrency: string; // Accept selectedCurrency as a prop
 }
 
 const defaultBuyInOptions = [10, 25, 50];
 
-const BuyInSelector: React.FC<BuyInSelectorProps> = ({ setBuyInAmount }) => {
+const BuyInSelector: React.FC<BuyInSelectorProps> = ({
+  setBuyInAmount,
+  selectedCurrency,
+}) => {
   const [customAmount, setCustomAmount] = useState("");
   const [buyInAmount, setBuyInAmountState] = useState<number | null>(null);
 
@@ -54,7 +58,10 @@ const BuyInSelector: React.FC<BuyInSelectorProps> = ({ setBuyInAmount }) => {
             ]}
             onPress={() => handleBuyInSelection(amount)}
           >
-            <Text style={styles.buttonText}>{amount}</Text>
+            <Text style={styles.buttonText}>
+              {selectedCurrency} {amount}{" "}
+              {/* Display the selected currency before the amount */}
+            </Text>
           </TouchableOpacity>
         ))}
       </View>
@@ -69,7 +76,9 @@ const BuyInSelector: React.FC<BuyInSelectorProps> = ({ setBuyInAmount }) => {
       />
 
       <Text style={styles.selectionText}>
-        Selected Buy-in: {buyInAmount !== null ? buyInAmount : "None"}
+        Selected Buy-in:{" "}
+        {buyInAmount !== null ? `${selectedCurrency} ${buyInAmount}` : "None"}{" "}
+        {/* Display the currency here */}
       </Text>
     </View>
   );

components/CalculatorState.tsx

@@ -10,9 +10,13 @@ export interface PokerState {
   buyInAmount: number | null;
   numberOfChips: number;
   totalChipsCount: number[];
+  selectedCurrency: string;
 }
 
-export const saveState = async (slot: keyof typeof STORAGE_KEYS, state: PokerState) => {
+export const saveState = async (
+  slot: keyof typeof STORAGE_KEYS,
+  state: PokerState
+) => {
   try {
     await AsyncStorage.setItem(STORAGE_KEYS[slot], JSON.stringify(state));
     return { success: true, message: `State saved to ${slot}` };
@@ -21,7 +25,9 @@ export const saveState = async (slot: keyof typeof STORAGE_KEYS, state: PokerSta
   }
 };
 
-export const loadState = async (slot: keyof typeof STORAGE_KEYS): Promise<PokerState | null> => {
+export const loadState = async (
+  slot: keyof typeof STORAGE_KEYS
+): Promise<PokerState | null> => {
   try {
     const storedState = await AsyncStorage.getItem(STORAGE_KEYS[slot]);
     return storedState ? JSON.parse(storedState) : null;

components/ChipDistributionSummary.tsx

@@ -7,6 +7,7 @@ interface ChipDistributionSummaryProps {
   buyInAmount: number;
   totalChipsCount: number[];
   colors?: ColorValue[];
+  selectedCurrency: string; // Add the selectedCurrency as a prop here
 }
 
 const ChipDistributionSummary = ({
@@ -14,6 +15,7 @@ const ChipDistributionSummary = ({
   buyInAmount,
   totalChipsCount,
   colors = ["white", "red", "green", "blue", "black"],
+  selectedCurrency,
 }: ChipDistributionSummaryProps) => {
   const validDenominations: validDenomination[] = [
     0.05, 0.1, 0.25, 0.5, 1, 2, 2.5, 5, 10, 20, 50, 100,
@@ -35,7 +37,6 @@ const ChipDistributionSummary = ({
     | 50
     | 100;
 
-  // Return the closest (but lower) valid denomination to the target
   const findFloorDenomination = (target: number): validDenomination => {
     let current: validDenomination = validDenominations[0];
     validDenominations.forEach((value, index) => {
@@ -44,8 +45,6 @@ const ChipDistributionSummary = ({
     return current;
   };
 
-  // Bound for the value of the highest chip
-  // This is somewhat arbitray, but 1/3 to 1/4 is reasonable depending on the number of colors.
   const maxDenomination = useMemo(() => {
     if (totalChipsCount.length > 3) {
       return findFloorDenomination(buyInAmount / 3);
@@ -54,13 +53,11 @@ const ChipDistributionSummary = ({
     }
   }, [totalChipsCount]);
 
-  // Total value of the pot
   const potValue = useMemo(
     () => buyInAmount * playerCount,
     [buyInAmount, playerCount]
   );
 
-  // The total value of all chips distributed to a single player. Ideally should be equal to buyInAmount
   const totalValue = useMemo(() => {
     let value = 0;
     for (let i = 0; i < totalChipsCount.length; i++) {
@@ -69,14 +66,11 @@ const ChipDistributionSummary = ({
     return value;
   }, [distributions, denominations]);
 
-  // Maximum quantity of each chip color which may be distributed to a single player before running out
   const maxPossibleDistribution = useMemo(
     () => totalChipsCount.map((v) => Math.floor(v / playerCount)),
     [totalChipsCount, playerCount]
   );
 
-  // Redenominate the chips in case of failure to properly distribute.
-  // Move the shuffle index to the next lowest denomination, and keep all else same
   const redenominate = useCallback(
     (
       invalidDenomination: validDenomination[],
@@ -106,17 +100,14 @@ const ChipDistributionSummary = ({
     []
   );
 
-  // Dynamically set denominations and distributions from changing inputs
   useEffect(() => {
     let testDenomination: validDenomination[] = [];
-
     const numColors = totalChipsCount.length;
     const testDistribution: number[] = [];
     for (let i = 0; i < numColors; ++i) {
       testDistribution.push(0);
     }
 
-    // Start with max denominations, then push on the next adjacent lower denomination
     testDenomination.push(maxDenomination);
     let currentDenominationIndex: number =
       validDenominations.indexOf(maxDenomination);
@@ -127,9 +118,6 @@ const ChipDistributionSummary = ({
     }
     testDenomination.reverse();
 
-    // Distribute the chips using the test denomination
-    // If distribution fails to equal the buy-in, redenominate and re-try
-    // Algorithm could be improved with more complexity and optimization
     let remainingValue = buyInAmount;
     let fail = true;
     let failCount = 0;
@@ -167,7 +155,9 @@ const ChipDistributionSummary = ({
   return (
     <View style={styles.container}>
       <Text style={styles.title}>Distribution & Denomination</Text>
-      <Text style={styles.subTitle}>${potValue} Pot</Text>
+      <Text style={styles.subTitle}>
+        {selectedCurrency} {potValue} Pot
+      </Text>
       <View style={styles.chipContainer}>
         {totalChipsCount.map((_, index) => (
           <View style={styles.chipRow} key={index}>
@@ -187,12 +177,14 @@ const ChipDistributionSummary = ({
                 ...(colors[index] === "white" && styles.whiteShadow),
               }}
             >
-              ${denominations[index]} each
+              {selectedCurrency} {denominations[index]} each
             </Text>
           </View>
         ))}
       </View>
-      <Text style={styles.chipText}>Total Value:{totalValue}</Text>
+      <Text style={styles.chipText}>
+        Total Value: {selectedCurrency} {totalValue}
+      </Text>
     </View>
   );
 };

components/CurrencySelector.tsx

@@ -0,0 +1,46 @@
+import React from "react";
+import { View, StyleSheet, Text } from "react-native";
+import { Picker } from "@react-native-picker/picker";
+
+interface CurrencySelectorProps {
+  selectedCurrency: string;
+  setSelectedCurrency: React.Dispatch<React.SetStateAction<string>>;
+}
+
+const CurrencySelector: React.FC<CurrencySelectorProps> = ({
+  selectedCurrency,
+  setSelectedCurrency,
+}) => {
+  return (
+    <View style={styles.container}>
+      <Text style={styles.title}>Select Currency:</Text>
+      <Picker
+        selectedValue={selectedCurrency}
+        onValueChange={(itemValue) => setSelectedCurrency(itemValue)}
+        style={styles.picker}
+        testID="currency-picker" // ✅ Add testID here
+      >
+        <Picker.Item label="USD ($)" value="$" />
+        <Picker.Item label="Euro (€)" value="€" />
+        <Picker.Item label="Pound (£)" value="£" />
+        <Picker.Item label="INR (₹)" value="₹" />
+      </Picker>
+    </View>
+  );
+};
+
+const styles = StyleSheet.create({
+  container: {
+    marginBottom: 20,
+  },
+  title: {
+    fontSize: 18,
+    marginBottom: 10,
+  },
+  picker: {
+    height: 50,
+    width: 150,
+  },
+});
+
+export default CurrencySelector;

components/PersistentState.tsx

@@ -7,8 +7,18 @@ export interface PokerState {
   buyInAmount: number | null;
   numberOfChips: number;
   totalChipsCount: number[];
+  selectedCurrency: string;
 }
 
+const DEFAULT_STATE: PokerState = {
+  playerCount: 0,
+  buyInAmount: null,
+  numberOfChips: 0,
+  totalChipsCount: [],
+  selectedCurrency: "$",
+};
+
+// 🔹 Save state with currency
 export const savePersistentState = async (state: PokerState) => {
   try {
     await AsyncStorage.setItem(STORAGE_KEY, JSON.stringify(state));
@@ -18,11 +28,12 @@ export const savePersistentState = async (state: PokerState) => {
   }
 };
 
-export const loadPersistentState = async (): Promise<PokerState | null> => {
+// 🔹 Load state with currency
+export const loadPersistentState = async (): Promise<PokerState> => {
   try {
     const storedState = await AsyncStorage.getItem(STORAGE_KEY);
-    return storedState ? JSON.parse(storedState) : null;
+    return storedState ? JSON.parse(storedState) : DEFAULT_STATE; // Ensure default values
   } catch (error) {
-    return null;
+    return DEFAULT_STATE;
   }
 };

components/__tests__/BuyInSelector.test.tsx

@@ -14,28 +14,34 @@ describe("BuyInSelector Component", () => {
   let getByText;
   let getByPlaceholderText;
 
-  const renderComponent = () => {
-    const result = render(<BuyInSelector setBuyInAmount={setBuyInAmount} />);
+  // Render the component with the necessary props
+  const renderComponent = (selectedCurrency = "$") => {
+    const result = render(
+      <BuyInSelector
+        setBuyInAmount={setBuyInAmount}
+        selectedCurrency={selectedCurrency}
+      />
+    );
     getByText = result.getByText;
     getByPlaceholderText = result.getByPlaceholderText;
   };
 
   beforeEach(() => {
     setBuyInAmount = jest.fn();
-    renderComponent();
+    renderComponent(); // Render with default currency
   });
 
   it("renders the buy-in options and input correctly", () => {
     expect(getByText("Select Buy-in Amount:")).toBeTruthy();
-    expect(getByText("10")).toBeTruthy();
-    expect(getByText("25")).toBeTruthy();
-    expect(getByText("50")).toBeTruthy();
+    expect(getByText("$ 10")).toBeTruthy();
+    expect(getByText("$ 25")).toBeTruthy();
+    expect(getByText("$ 50")).toBeTruthy();
     expect(getByPlaceholderText("Enter custom buy-in")).toBeTruthy();
     expect(getByText("Selected Buy-in: None")).toBeTruthy(); // Check default selection
   });
 
   it("sets a predefined buy-in amount correctly", () => {
-    fireEvent.press(getByText("25"));
+    fireEvent.press(getByText("$ 25"));
     expect(setBuyInAmount).toHaveBeenCalledWith(25);
   });
 
@@ -53,7 +59,7 @@ describe("BuyInSelector Component", () => {
 
   it("clears the custom amount when selecting a predefined option", () => {
     fireEvent.changeText(getByPlaceholderText("Enter custom buy-in"), "100");
-    fireEvent.press(getByText("50"));
+    fireEvent.press(getByText("$ 50"));
     expect(setBuyInAmount).toHaveBeenCalledWith(50);
   });
 
@@ -69,8 +75,8 @@ describe("BuyInSelector Component", () => {
   });
 
   it("triggers state update every time a buy-in option is clicked, even if it's the same", () => {
-    fireEvent.press(getByText("25")); // First click
-    fireEvent.press(getByText("25")); // Clicking the same option again
+    fireEvent.press(getByText("$ 25")); // First click
+    fireEvent.press(getByText("$ 25")); // Clicking the same option again
     expect(setBuyInAmount).toHaveBeenCalledTimes(2); // Expect it to be called twice
   });
 
@@ -85,7 +91,15 @@ describe("BuyInSelector Component", () => {
   it("updates state correctly when selecting predefined buy-in after entering a custom amount", () => {
     fireEvent.changeText(getByPlaceholderText("Enter custom buy-in"), "200");
     expect(setBuyInAmount).toHaveBeenCalledWith(200);
-    fireEvent.press(getByText("10"));
+    fireEvent.press(getByText("$ 10"));
     expect(setBuyInAmount).toHaveBeenCalledWith(10);
   });
+
+  it("displays selected currency correctly", () => {
+    renderComponent("€"); // Test with a different currency
+    expect(getByText("€ 10")).toBeTruthy();
+    expect(getByText("€ 25")).toBeTruthy();
+    expect(getByText("€ 50")).toBeTruthy();
+    expect(getByText("Selected Buy-in: None")).toBeTruthy();
+  });
 });

components/__tests__/CalculatorState.test.tsx

@@ -1,6 +1,7 @@
 import AsyncStorage from "@react-native-async-storage/async-storage";
 import { saveState, loadState, PokerState } from "../CalculatorState";
 
+// Mock AsyncStorage
 jest.mock("@react-native-async-storage/async-storage", () =>
   require("@react-native-async-storage/async-storage/jest/async-storage-mock")
 );
@@ -11,13 +12,14 @@ describe("CalculatorState.tsx", () => {
     buyInAmount: 50,
     numberOfChips: 5,
     totalChipsCount: [100, 200, 150, 50, 75],
+    selectedCurrency: "$", // Including selectedCurrency in mockState
   };
 
   beforeEach(() => {
     jest.clearAllMocks();
   });
 
-  it("should save state successfully", async () => {
+  it("should save state successfully to SLOT1", async () => {
     await saveState("SLOT1", mockState);
     expect(AsyncStorage.setItem).toHaveBeenCalledWith(
       "@poker_state_slot1",
@@ -25,28 +27,60 @@ describe("CalculatorState.tsx", () => {
     );
   });
 
+  it("should save state successfully to SLOT2", async () => {
+    await saveState("SLOT2", mockState);
+    expect(AsyncStorage.setItem).toHaveBeenCalledWith(
+      "@poker_state_slot2",
+      JSON.stringify(mockState)
+    );
+  });
+
   it("should fail to save state if an error occurs", async () => {
-    jest.spyOn(AsyncStorage, "setItem").mockRejectedValueOnce(new Error("Failed to save"));
+    jest
+      .spyOn(AsyncStorage, "setItem")
+      .mockRejectedValueOnce(new Error("Failed to save"));
     const result = await saveState("SLOT1", mockState);
     expect(result.success).toBe(false);
     expect(result.message).toBe("Failed to save state");
   });
 
-  it("should load state successfully", async () => {
+  it("should load state successfully from SLOT1", async () => {
     await AsyncStorage.setItem("@poker_state_slot1", JSON.stringify(mockState));
     const result = await loadState("SLOT1");
     expect(result).toEqual(mockState);
   });
 
-  it("should return null if no state is found", async () => {
+  it("should load state successfully from SLOT2", async () => {
+    await AsyncStorage.setItem("@poker_state_slot2", JSON.stringify(mockState));
+    const result = await loadState("SLOT2");
+    expect(result).toEqual(mockState);
+  });
+
+  it("should return null if no state is found in SLOT1", async () => {
     jest.spyOn(AsyncStorage, "getItem").mockResolvedValueOnce(null);
     const result = await loadState("SLOT1");
     expect(result).toBeNull();
   });
 
-  it("should return null if an error occurs while loading state", async () => {
-    jest.spyOn(AsyncStorage, "getItem").mockRejectedValueOnce(new Error("Failed to load"));
+  it("should return null if no state is found in SLOT2", async () => {
+    jest.spyOn(AsyncStorage, "getItem").mockResolvedValueOnce(null);
+    const result = await loadState("SLOT2");
+    expect(result).toBeNull();
+  });
+
+  it("should return null if an error occurs while loading state from SLOT1", async () => {
+    jest
+      .spyOn(AsyncStorage, "getItem")
+      .mockRejectedValueOnce(new Error("Failed to load"));
     const result = await loadState("SLOT1");
     expect(result).toBeNull();
   });
+
+  it("should return null if an error occurs while loading state from SLOT2", async () => {
+    jest
+      .spyOn(AsyncStorage, "getItem")
+      .mockRejectedValueOnce(new Error("Failed to load"));
+    const result = await loadState("SLOT2");
+    expect(result).toBeNull();
+  });
 });

components/__tests__/ChipDistributionSummary.test.tsx

@@ -23,14 +23,18 @@ describe("ChipDistributionSummary Component", () => {
     expect(getByText("Distribution & Denomination")).toBeTruthy();
 
     expectedDistribution.forEach((count, index) => {
-      expect(getAllByText(new RegExp(`${count} chips:`, "i"))).toBeTruthy();
+      // Ensure "X chips:" appears correctly
+      expect(getAllByText(new RegExp(`^${count}\\s+chips:`, "i"))).toBeTruthy();
+
+      // Ensure value format matches the rendered output
       expect(
-        getByText(new RegExp(`\\$${expectedDenominations[index]} each`, "i"))
+        getByText(
+          new RegExp(`^\\s*${expectedDenominations[index]}\\s+each$`, "i")
+        )
       ).toBeTruthy();
     });
   });
 
-  // Case not currently supported
   test.skip("renders fallback message when no valid distribution", () => {
     const { getByText } = render(
       <ChipDistributionSummary
@@ -42,7 +46,6 @@ describe("ChipDistributionSummary Component", () => {
     expect(getByText("No valid distribution calculated yet.")).toBeTruthy();
   });
 
-  // Case not currently supported
   test.skip("scales down chips if exceeding MAX_CHIPS", () => {
     const playerCount = 2;
     let totalChipsCount = [300, 400, 500, 600, 700];
@@ -56,7 +59,7 @@ describe("ChipDistributionSummary Component", () => {
       );
     }
 
-    const expectedDistribution = [30, 40, 50, 60, 70]; // Adjust to match actual component calculations
+    const expectedDistribution = [30, 40, 50, 60, 70]; // Adjust as per actual component calculations
 
     const { getByText } = render(
       <ChipDistributionSummary
@@ -69,8 +72,7 @@ describe("ChipDistributionSummary Component", () => {
     expect(getByText("Distribution & Denomination")).toBeTruthy();
 
     expectedDistribution.forEach((count, index) => {
-      expect(getByText(new RegExp(`${count} chips:`, "i"))).toBeTruthy();
-      // expect(getByText(new RegExp(`$${count} each`, "i"))).toBeTruthy();
+      expect(getByText(new RegExp(`^${count}\\s+chips:`, "i"))).toBeTruthy();
     });
   });
 });

components/__tests__/CurrencySelector.test.tsx

@@ -0,0 +1,49 @@
+import React from "react";
+import { render, fireEvent } from "@testing-library/react-native";
+import CurrencySelector from "@/components/CurrencySelector";
+
+describe("CurrencySelector Component", () => {
+  const mockSetSelectedCurrency = jest.fn();
+
+  test("renders CurrencySelector component correctly", () => {
+    const { getByText, getByTestId } = render(
+      <CurrencySelector
+        selectedCurrency="$"
+        setSelectedCurrency={mockSetSelectedCurrency}
+      />
+    );
+
+    expect(getByText("Select Currency:")).toBeTruthy(); // Check label exists
+    expect(getByTestId("currency-picker")).toBeTruthy(); // Check Picker exists
+  });
+
+  test("calls setSelectedCurrency when a new currency is selected", () => {
+    const { getByTestId } = render(
+      <CurrencySelector
+        selectedCurrency="$"
+        setSelectedCurrency={mockSetSelectedCurrency}
+      />
+    );
+
+    const picker = getByTestId("currency-picker"); // Get Picker
+
+    fireEvent(picker, "onValueChange", "€"); // Simulate selecting Euro (€)
+
+    expect(mockSetSelectedCurrency).toHaveBeenCalledWith("€");
+  });
+
+  test("updates selected currency when Picker value changes", () => {
+    const { getByTestId } = render(
+      <CurrencySelector
+        selectedCurrency="€"
+        setSelectedCurrency={mockSetSelectedCurrency}
+      />
+    );
+
+    const picker = getByTestId("currency-picker");
+
+    fireEvent(picker, "onValueChange", "$"); // Simulate selecting USD ($)
+
+    expect(mockSetSelectedCurrency).toHaveBeenCalledWith("$");
+  });
+});

components/__tests__/PersistentState.test.tsx

@@ -1,17 +1,22 @@
 import AsyncStorage from "@react-native-async-storage/async-storage";
-import { saveState, loadState, PokerState } from "../CalculatorState";
+import {
+  savePersistentState,
+  loadPersistentState,
+  PokerState,
+} from "../PersistentState";
 
 jest.mock("@react-native-async-storage/async-storage", () => ({
   setItem: jest.fn(),
   getItem: jest.fn(),
 }));
 
-describe("CalculatorState.tsx", () => {
+describe("PersistentState.tsx", () => {
   const mockState: PokerState = {
     playerCount: 4,
     buyInAmount: 50,
     numberOfChips: 5,
     totalChipsCount: [100, 200, 150, 50, 75],
+    selectedCurrency: "$", // Including selectedCurrency in mockState
   };
 
   beforeEach(() => {
@@ -19,35 +24,78 @@ describe("CalculatorState.tsx", () => {
   });
 
   it("should save state successfully", async () => {
+    // Mocking AsyncStorage.setItem to resolve successfully
     (AsyncStorage.setItem as jest.Mock).mockResolvedValueOnce(undefined);
-    const result = await saveState("SLOT1", mockState);
+
+    const result = await savePersistentState(mockState);
+
+    // Check that the success flag is true and message is as expected
     expect(result.success).toBe(true);
-    expect(result.message).toBe("State saved to SLOT1");
-    expect(AsyncStorage.setItem).toHaveBeenCalledWith("@poker_state_slot1", JSON.stringify(mockState));
+    expect(result.message).toBe("State saved successfully");
+
+    // Check that AsyncStorage.setItem was called with the correct parameters
+    expect(AsyncStorage.setItem).toHaveBeenCalledWith(
+      "@poker_calculator_state",
+      JSON.stringify(mockState)
+    );
   });
 
   it("should fail to save state if an error occurs", async () => {
-    (AsyncStorage.setItem as jest.Mock).mockRejectedValueOnce(new Error("Failed to save"));
-    const result = await saveState("SLOT1", mockState);
+    // Mocking AsyncStorage.setItem to reject with an error
+    (AsyncStorage.setItem as jest.Mock).mockRejectedValueOnce(
+      new Error("Failed to save")
+    );
+
+    const result = await savePersistentState(mockState);
+
+    // Check that the success flag is false and message is as expected
     expect(result.success).toBe(false);
     expect(result.message).toBe("Failed to save state");
   });
 
   it("should load state successfully", async () => {
-    (AsyncStorage.getItem as jest.Mock).mockResolvedValueOnce(JSON.stringify(mockState));
-    const result = await loadState("SLOT1");
+    // Mocking AsyncStorage.getItem to resolve with the mockState
+    (AsyncStorage.getItem as jest.Mock).mockResolvedValueOnce(
+      JSON.stringify(mockState)
+    );
+
+    const result = await loadPersistentState();
+
+    // Check that the loaded state matches the mockState
     expect(result).toEqual(mockState);
   });
 
-  it("should return null if no state is found", async () => {
+  it("should load default state if no saved state is found", async () => {
+    // Mocking AsyncStorage.getItem to return null (no saved state)
     (AsyncStorage.getItem as jest.Mock).mockResolvedValueOnce(null);
-    const result = await loadState("SLOT1");
-    expect(result).toBeNull();
+
+    const result = await loadPersistentState();
+
+    // Check that the default state is returned
+    expect(result).toEqual({
+      playerCount: 0,
+      buyInAmount: null,
+      numberOfChips: 0,
+      totalChipsCount: [],
+      selectedCurrency: "$",
+    });
   });
 
-  it("should return null if an error occurs while loading state", async () => {
-    (AsyncStorage.getItem as jest.Mock).mockRejectedValueOnce(new Error("Failed to load"));
-    const result = await loadState("SLOT1");
-    expect(result).toBeNull();
+  it("should return default state if an error occurs while loading", async () => {
+    // Mocking AsyncStorage.getItem to reject with an error
+    (AsyncStorage.getItem as jest.Mock).mockRejectedValueOnce(
+      new Error("Failed to load")
+    );
+
+    const result = await loadPersistentState();
+
+    // Check that the default state is returned on error
+    expect(result).toEqual({
+      playerCount: 0,
+      buyInAmount: null,
+      numberOfChips: 0,
+      totalChipsCount: [],
+      selectedCurrency: "$",
+    });
   });
 });

package-lock.json

@@ -10,9 +10,10 @@
       "dependencies": {
         "@expo/vector-icons": "14.0.4",
         "@react-native-async-storage/async-storage": "^2.1.1",
+        "@react-native-picker/picker": "^2.11.0",
         "@react-navigation/bottom-tabs": "7.2.0",
         "@react-navigation/native": "7.0.14",
-        "expo": "^52.0.37",
+        "expo": "52.0.37",
         "expo-blur": "14.0.3",
         "expo-constants": "17.0.7",
         "expo-file-system": "18.0.11",
@@ -33,6 +34,7 @@
         "react-native-reanimated": "3.16.7",
         "react-native-safe-area-context": "4.12.0",
         "react-native-screens": "4.4.0",
+        "react-native-vector-icons": "^10.2.0",
         "react-native-web": "0.19.13",
         "react-native-webview": "13.12.5"
       },
@@ -3926,6 +3928,19 @@
         "react-native": "^0.0.0-0 || >=0.65 <1.0"
       }
     },
+    "node_modules/@react-native-picker/picker": {
+      "version": "2.11.0",
+      "resolved": "https://registry.npmjs.org/@react-native-picker/picker/-/picker-2.11.0.tgz",
+      "integrity": "sha512-QuZU6gbxmOID5zZgd/H90NgBnbJ3VV6qVzp6c7/dDrmWdX8S0X5YFYgDcQFjE3dRen9wB9FWnj2VVdPU64adSg==",
+      "license": "MIT",
+      "workspaces": [
+        "example"
+      ],
+      "peerDependencies": {
+        "react": "*",
+        "react-native": "*"
+      }
+    },
     "node_modules/@react-native/assets-registry": {
       "version": "0.76.7",
       "resolved": "https://registry.npmjs.org/@react-native/assets-registry/-/assets-registry-0.76.7.tgz",
@@ -14431,6 +14446,92 @@
         "react-native": "*"
       }
     },
+    "node_modules/react-native-vector-icons": {
+      "version": "10.2.0",
+      "resolved": "https://registry.npmjs.org/react-native-vector-icons/-/react-native-vector-icons-10.2.0.tgz",
+      "integrity": "sha512-n5HGcxUuVaTf9QJPs/W22xQpC2Z9u0nb0KgLPnVltP8vdUvOp6+R26gF55kilP/fV4eL4vsAHUqUjewppJMBOQ==",
+      "license": "MIT",
+      "dependencies": {
+        "prop-types": "^15.7.2",
+        "yargs": "^16.1.1"
+      },
+      "bin": {
+        "fa-upgrade.sh": "bin/fa-upgrade.sh",
+        "fa5-upgrade": "bin/fa5-upgrade.sh",
+        "fa6-upgrade": "bin/fa6-upgrade.sh",
+        "generate-icon": "bin/generate-icon.js"
+      }
+    },
+    "node_modules/react-native-vector-icons/node_modules/cliui": {
+      "version": "7.0.4",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-7.0.4.tgz",
+      "integrity": "sha512-OcRE68cOsVMXp1Yvonl/fzkQOyjLSu/8bhPDfQt0e0/Eb283TKP20Fs2MqoPsr9SwA595rRCA+QMzYc9nBP+JQ==",
+      "license": "ISC",
+      "dependencies": {
+        "string-width": "^4.2.0",
+        "strip-ansi": "^6.0.0",
+        "wrap-ansi": "^7.0.0"
+      }
+    },
+    "node_modules/react-native-vector-icons/node_modules/emoji-regex": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+      "license": "MIT"
+    },
+    "node_modules/react-native-vector-icons/node_modules/string-width": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
+      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
+      "license": "MIT",
+      "dependencies": {
+        "emoji-regex": "^8.0.0",
+        "is-fullwidth-code-point": "^3.0.0",
+        "strip-ansi": "^6.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/react-native-vector-icons/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "license": "MIT",
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/react-native-vector-icons/node_modules/yargs": {
+      "version": "16.2.0",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-16.2.0.tgz",
+      "integrity": "sha512-D1mvvtDG0L5ft/jGWkLpG1+m0eQxOfaBvTNELraWj22wSVUMWxZUvYgJYcKh6jGGIkJFhH4IZPQhR4TKpc8mBw==",
+      "license": "MIT",
+      "dependencies": {
+        "cliui": "^7.0.2",
+        "escalade": "^3.1.1",
+        "get-caller-file": "^2.0.5",
+        "require-directory": "^2.1.1",
+        "string-width": "^4.2.0",
+        "y18n": "^5.0.5",
+        "yargs-parser": "^20.2.2"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/react-native-vector-icons/node_modules/yargs-parser": {
+      "version": "20.2.9",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.9.tgz",
+      "integrity": "sha512-y11nGElTIV+CT3Zv9t7VKl+Q3hTQoT9a1Qzezhhl6Rp21gJ/IVTW7Z3y9EWXhuUBC2Shnf+DX0antecpAwSP8w==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/react-native-web": {
       "version": "0.19.13",
       "resolved": "https://registry.npmjs.org/react-native-web/-/react-native-web-0.19.13.tgz",

package.json

@@ -20,6 +20,7 @@
   "dependencies": {
     "@expo/vector-icons": "14.0.4",
     "@react-native-async-storage/async-storage": "^2.1.1",
+    "@react-native-picker/picker": "^2.11.0",
     "@react-navigation/bottom-tabs": "7.2.0",
     "@react-navigation/native": "7.0.14",
     "expo": "52.0.37",