Implemented Token Generation. Closes #6

src/integration/java/de/nclazz/service/mailrelay/AccountCrudTest.java

@@ -55,6 +55,7 @@ public class AccountCrudTest {
                 .andExpect(content().contentType(APPLICATION_JSON))
                 .andDo(MockMvcResultHandlers.print())
                 .andExpect(jsonPath("$.name").value("my-company"))
+                .andExpect(jsonPath("$.token").isNotEmpty())
                 .andExpect(jsonPath("$.receivers", is(List.of("vip@my-company.com"))));
     }
 
@@ -67,6 +68,7 @@ public class AccountCrudTest {
                 .andExpect(status().is2xxSuccessful())
                 .andExpect(content().contentType(APPLICATION_JSON))
                 .andExpect(jsonPath("$.name").value("retrievable-account"))
+                .andExpect(jsonPath("$.token").isNotEmpty())
                 .andExpect(jsonPath("$.receivers", is(List.of("info@account.com"))));
     }
 
@@ -81,6 +83,7 @@ public class AccountCrudTest {
                 .andExpect(status().is2xxSuccessful())
                 .andExpect(content().contentType(APPLICATION_JSON))
                 .andExpect(jsonPath("$.name").value("updated-account-renamed"))
+                .andExpect(jsonPath("$.token").isNotEmpty())
                 .andExpect(jsonPath("$.receivers", is(List.of("vip@account.com"))));
     }
 

src/main/java/de/nclazz/service/mailrelay/domain/Relay.java

@@ -6,8 +6,11 @@ import lombok.NonNull;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 
+import java.math.BigInteger;
+import java.security.SecureRandom;
 import java.util.List;
 import java.util.Optional;
+import java.util.Random;
 import java.util.UUID;
 
 @Data
@@ -15,6 +18,9 @@ import java.util.UUID;
 @Service
 public class Relay {
 
+    public static final int TOKEN_NUM_BITS = 256;
+    private final Random RANDOM = new SecureRandom();
+
     private final AccountRepository accountRepository;
     private final MessageRepository messageRepository;
 
@@ -31,9 +37,17 @@ public class Relay {
     }
 
     public Account saveAccount(@NonNull Account account) {
+        if(StringUtils.isStringEmpty(account.getToken())) {
+            String token = generateToken();
+            account.setToken(token);
+        }
         return this.accountRepository.save(account);
     }
 
+    private String generateToken() {
+        return new BigInteger(TOKEN_NUM_BITS, RANDOM).toString(16);
+    }
+
     public List<Account> accounts() {
         return this.accountRepository.findAll();
     }

src/main/java/de/nclazz/service/mailrelay/domain/StringUtils.java

@@ -0,0 +1,14 @@
+package de.nclazz.service.mailrelay.domain;
+
+public abstract class StringUtils {
+
+    private StringUtils() { /* no-op */ }
+
+    public static boolean isStringEmpty(String input) {
+        if(input == null) {
+            return true;
+        }
+        return input.trim().isEmpty();
+    }
+
+}

src/test/java/de/nclazz/service/mailrelay/adapter/web/AccountRestControllerTest.java

@@ -27,6 +27,7 @@ class AccountRestControllerTest {
         );
 
         assertThat(controller.addAccount(form))
+                .extracting("body")
                 .extracting("name", "receivers")
                 .containsExactly("my-account", List.of("vip@my-company.com", "info@my-company.com"));
     }

src/test/java/de/nclazz/service/mailrelay/domain/RelayTest.java

@@ -26,4 +26,17 @@ class RelayTest {
                 .hasSize(1)
                 .containsExactly(account);
     }
+
+    @Test
+    void saveAccountEnsuresTokenIsSetOnAccount() {
+        Account account = Account.of("my-account", List.of("vip@me.com"));
+
+        FakeAccountRepository repository = new FakeAccountRepository();
+        Relay relay = new Relay(repository, new FakeMessageRepository());
+
+        assertThat(relay.saveAccount(account))
+                .isNotNull()
+                .extracting("token")
+                .isNotNull();
+    }
 }