Update ShareTest.java

src/test/java/edu/ntnu/idi/idatt2003/g40/mappe/ShareTest.java

@@ -1,3 +1,48 @@
-public class ShareTest {
-
-}
+package edu.ntnu.idi.idatt2003.g40.mappe;
+
+import org.junit.jupiter.api.Test;
+
+import java.math.BigDecimal;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertSame;
+
+class ShareTest {
+
+    @Test
+    void constructorStoresAllValuesCorrectly() {
+        Stock stock = new Stock("AAPL", "Apple Inc.", new BigDecimal("150.00"));
+        BigDecimal quantity = new BigDecimal("10");
+        BigDecimal purchasePrice = new BigDecimal("145.50");
+
+        Share share = new Share(stock, quantity, purchasePrice);
+
+        assertSame(stock, share.getStock());
+        assertEquals(quantity, share.getQuantity());
+        assertEquals(purchasePrice, share.getPurchasePrice());
+    }
+
+    @Test
+    void shareSupportsDecimalValues() {
+        Stock stock = new Stock("TSLA", "Tesla Inc.", new BigDecimal("200.00"));
+
+        Share share = new Share(
+                stock,
+                new BigDecimal("2.5"),
+                new BigDecimal("198.75")
+        );
+
+        assertEquals(new BigDecimal("2.5"), share.getQuantity());
+        assertEquals(new BigDecimal("198.75"), share.getPurchasePrice());
+    }
+
+    @Test
+    void getStockReturnsCorrectStockObject() {
+        Stock stock = new Stock("NVDA", "NVIDIA Corporation", new BigDecimal("875.40"));
+        Share share = new Share(stock, new BigDecimal("4"), new BigDecimal("850.00"));
+
+        assertSame(stock, share.getStock());
+        assertEquals("NVDA", share.getStock().getSymbol());
+        assertEquals("NVIDIA Corporation", share.getStock().getCompany());
+    }
+}