Increased Test Coverage

src/main/java/seedu/binbash/quotes/Quotes.java

@@ -49,7 +49,7 @@ public class Quotes {
     private static final Random RANDOM = new Random();
 
     // Private constructor to prevent instantiation
-    private Quotes() {}
+    public Quotes() {}
 
     public static String getRandomQuote() {
         int randomIndex = RANDOM.nextInt(CUSTOM_MESSAGES.length);

src/test/java/seedu/binbash/command/ProfitCommandTest.java

@@ -0,0 +1,39 @@
+package seedu.binbash.command;
+
+import org.junit.jupiter.api.Test;
+
+import seedu.binbash.item.Item;
+import seedu.binbash.inventory.ItemList;
+
+import java.time.LocalDate;
+import java.util.ArrayList;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class ProfitCommandTest {
+
+    @Test
+    void execute_calculateTotalProfit() {
+        ArrayList<Item> emptyItemList = new ArrayList<>();
+        ItemList itemList = new ItemList(emptyItemList);
+
+        AddCommand addCommand1 = new AddCommand("retail", "Item 1", "Description 1", 1,
+                LocalDate.now(), 5, 3, 1);
+        addCommand1.execute(itemList);
+
+        AddCommand addCommand2 = new AddCommand("retail", "Item 2", "Description 2", 1,
+                LocalDate.now(), 10, 7, 1);
+        addCommand2.execute(itemList);
+
+        SellCommand sellCommand1 = new SellCommand("Item 1", 1);
+        sellCommand1.execute(itemList);
+
+        SellCommand sellCommand2 = new SellCommand("Item 2", 1);
+        sellCommand2.execute(itemList);
+
+        ProfitCommand profitCommand = new ProfitCommand();
+        assertTrue(profitCommand.execute(itemList));
+        assertEquals("Total profit: $5.00", profitCommand.getExecutionUiOutput().trim());
+    }
+}

src/test/java/seedu/binbash/parser/ParserTest.java

@@ -20,6 +20,8 @@
 import org.apache.commons.cli.ParseException;
 
 import org.junit.jupiter.api.Assertions;
+import seedu.binbash.quotes.Quotes;
+
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertInstanceOf;
@@ -80,6 +82,21 @@ public void testParseCommand_repeatedQuoteCommand_returnsQuoteCommand() {
         }
     }
 
+
+    @Test
+    void getRandomQuote_returnsValidQuote() {
+        String quote = Quotes.getRandomQuote();
+
+        boolean quoteFound = false;
+        for (String predefinedQuote : Quotes.CUSTOM_MESSAGES) {
+            if (predefinedQuote.equals(quote)) {
+                quoteFound = true;
+                break;
+            }
+        }
+        assertTrue(quoteFound, "Returned quote is not one of the predefined quotes.");
+    }
+
     @Test
     public void testParseCommand_invalidCommand_throwsInvalidCommandException() {
         assertThrows(InvalidCommandException.class, () -> parser.parseCommand("invalid"));