feature(bank/account): Add check verification

Server/bank/account/src/main/java/com/cashmanager/server/account/verification/CheckVerification.java

@@ -0,0 +1,26 @@
+package com.cashmanager.server.account.verification;
+
+import com.cashmanager.server.database.entities.PaymentMethod;
+import com.cashmanager.server.database.enums.PaymentMethodType;
+
+public final class CheckVerification {
+    /**
+     * Private constructor to hide the implicit public one
+     */
+    private CheckVerification() {
+    }
+
+    /**
+     * Verify if the payment method is a check
+     *
+     * @param paymentMethod the payment method to verify
+     * @return true if the payment method is a credit card, false otherwise
+     */
+    public static boolean isACheck(PaymentMethod paymentMethod) {
+        return paymentMethod.getType().equals(PaymentMethodType.CHECK);
+    }
+
+    public static boolean isCashed(PaymentMethod paymentMethod) {
+        return isACheck(paymentMethod) && paymentMethod.getCashed();
+    }
+}

Server/bank/account/src/test/java/com/cashmanager/server/account/verification/CheckVerificationTest.java

@@ -0,0 +1,37 @@
+package com.cashmanager.server.account.verification;
+
+import com.cashmanager.server.common.utils.DateHelper;
+import com.cashmanager.server.database.entities.PaymentMethod;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class CheckVerificationTest {
+
+    @Test
+    void isACheck() {
+        PaymentMethod paymentMethod = PaymentMethod.createCheck(null, 123456789, false);
+        assertTrue(CheckVerification.isACheck(paymentMethod));
+    }
+
+    @Test
+    void isNotACheck() {
+        PaymentMethod paymentMethod = PaymentMethod.createCreditCard(null,
+                "12341234-1234-1234",
+                "123",
+                DateHelper.fromString("2025-01", true));
+        assertFalse(CheckVerification.isACheck(paymentMethod));
+    }
+
+    @Test
+    void isCashed() {
+        PaymentMethod paymentMethod = PaymentMethod.createCheck(null, 123456789, true);
+        assertTrue(CheckVerification.isCashed(paymentMethod));
+    }
+
+    @Test
+    void isNotCashed() {
+        PaymentMethod paymentMethod = PaymentMethod.createCheck(null, 123456789, false);
+        assertFalse(CheckVerification.isCashed(paymentMethod));
+    }
+}