diff --git a/core-banking/test/com/example/banking/domain/BankTest.java b/core-banking/test/com/example/banking/domain/BankTest.java
new file mode 100644
index 0000000..c97d134
--- /dev/null
+++ b/core-banking/test/com/example/banking/domain/BankTest.java
@@ -0,0 +1,29 @@
+package com.example.banking.domain;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertAll;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+class BankTest {
+
+	@Test
+	@DisplayName("Create one customer with two accounts successfuly")
+	void createBankAndOneCustomerSuccesfully() throws Throwable {
+		var garanti = new Bank(1L, "Garanti BBVA");
+		var jack = garanti.createCustomer("11111111110", "jack shephard");
+		jack.addAccount(new Account("tr1", 10_000));
+		jack.addAccount(new CheckingAccount("tr2", 20_000, 500));
+		assertAll(
+			() -> assertEquals(1L, garanti.getId()),	
+			() -> assertEquals("Garanti BBVA", garanti.getName()),	
+			() -> assertEquals(1, garanti.getCustomers().size()),	
+			() -> assertTrue(garanti.getCustomer("11111111110").isPresent()),	
+			() -> assertEquals(2,garanti.findCustomer("11111111110").getAccounts().size()),	
+			() -> assertEquals(30_000,garanti.getTotalBalance(),Double.MIN_NORMAL)	
+		);
+	}
+
+}