src/test/java/com/klaro/bais/PaymentServiceTest.java

@@ -0,0 +1,25 @@
+package com.klaro.bais;
+
+import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.Test;
+
+public class PaymentServiceTest {
+
+    @Test
+    public void testApprovePositiveAmount() {
+        PaymentService service = new PaymentService();
+        assertTrue(service.approve(100)); // Positive amount should be approved
+    }
+
+    @Test
+    public void testApproveZeroAmount() {
+        PaymentService service = new PaymentService();
+        assertFalse(service.approve(0)); // Zero amount should be rejected
+    }
+
+    @Test
+    public void testApproveNegativeAmount() {
+        PaymentService service = new PaymentService();
+        assertFalse(service.approve(-50)); // Negative amount should be rejected
+    }
+}