[#11878] Add methods to get an account request by ID

src/it/java/teammates/it/sqllogic/core/AccountRequestsLogicIT.java

@@ -1,6 +1,7 @@
 package teammates.it.sqllogic.core;
 
 import java.time.Instant;
+import java.util.UUID;
 
 import org.testng.annotations.Test;
 
@@ -20,6 +21,23 @@ public class AccountRequestsLogicIT extends BaseTestCaseWithSqlDatabaseAccess {
 
     private AccountRequestsLogic accountRequestsLogic = AccountRequestsLogic.inst();
 
+    @Test
+    public void testGetAccountRequest_nonExistentAccountRequest_returnsNull() {
+        UUID id = UUID.randomUUID();
+        AccountRequest actualAccountRequest = accountRequestsLogic.getAccountRequest(id);
+        assertNull(actualAccountRequest);
+    }
+
+    @Test
+    public void testGetAccountRequest_existingAccountRequest_getsSuccessfully() throws InvalidParametersException {
+        AccountRequest expectedAccountRequest =
+                new AccountRequest("test@gmail.com", "name", "institute", AccountRequestStatus.PENDING, "comments");
+        UUID id = expectedAccountRequest.getId();
+        accountRequestsLogic.createAccountRequest(expectedAccountRequest);
+        AccountRequest actualAccountRequest = accountRequestsLogic.getAccountRequest(id);
+        assertEquals(expectedAccountRequest, actualAccountRequest);
+    }
+
     @Test
     public void testResetAccountRequest()
             throws EntityAlreadyExistsException, InvalidParametersException, EntityDoesNotExistException {

src/it/java/teammates/it/storage/sqlapi/AccountRequestsDbIT.java

@@ -1,11 +1,13 @@
 package teammates.it.storage.sqlapi;
 
 import java.util.List;
+import java.util.UUID;
 
 import org.testng.annotations.Test;
 
 import teammates.common.datatransfer.AccountRequestStatus;
 import teammates.common.exception.EntityDoesNotExistException;
+import teammates.common.exception.InvalidParametersException;
 import teammates.it.test.BaseTestCaseWithSqlDatabaseAccess;
 import teammates.storage.sqlapi.AccountRequestsDb;
 import teammates.storage.sqlentity.AccountRequest;
@@ -72,6 +74,23 @@ public void testCreateReadDeleteAccountRequest() throws Exception {
         assertNull(actualAccountRequest);
     }
 
+    @Test
+    public void testGetAccountRequest_nonExistentAccountRequest_returnsNull() {
+        UUID id = UUID.randomUUID();
+        AccountRequest actualAccountRequest = accountRequestDb.getAccountRequest(id);
+        assertNull(actualAccountRequest);
+    }
+
+    @Test
+    public void testGetAccountRequest_existingAccountRequest_getsSuccessfully() throws InvalidParametersException {
+        AccountRequest expectedAccountRequest =
+                new AccountRequest("test@gmail.com", "name", "institute", AccountRequestStatus.PENDING, "comments");
+        UUID id = expectedAccountRequest.getId();
+        accountRequestDb.createAccountRequest(expectedAccountRequest);
+        AccountRequest actualAccountRequest = accountRequestDb.getAccountRequest(id);
+        assertEquals(expectedAccountRequest, actualAccountRequest);
+    }
+
     @Test
     public void testUpdateAccountRequest() throws Exception {
         ______TS("Update account request, does not exists, exception thrown");

src/main/java/teammates/sqllogic/api/Logic.java

@@ -95,6 +95,15 @@ public AccountRequest createAccountRequest(String name, String email, String ins
         return accountRequestLogic.createAccountRequest(name, email, institute, status, comments);
     }
 
+    /**
+     * Gets the account request with the given {@code id}.
+     *
+     * @return account request with the given {@code id}.
+     */
+    public AccountRequest getAccountRequest(UUID id) {
+        return accountRequestLogic.getAccountRequest(id);
+    }
+
     /**
      * Gets the account request with the given email and institute.
      *

src/main/java/teammates/sqllogic/core/AccountRequestsLogic.java

@@ -1,6 +1,7 @@
 package teammates.sqllogic.core;
 
 import java.util.List;
+import java.util.UUID;
 
 import teammates.common.datatransfer.AccountRequestStatus;
 import teammates.common.exception.EntityDoesNotExistException;
@@ -65,6 +66,13 @@ public AccountRequest createAccountRequest(String name, String email, String ins
         return accountRequestDb.createAccountRequest(toCreate);
     }
 
+    /**
+     * Gets the account request associated with the {@code id}.
+     */
+    public AccountRequest getAccountRequest(UUID id) {
+        return accountRequestDb.getAccountRequest(id);
+    }
+
     /**
      * Gets account request associated with the {@code email} and {@code institute}.
      */

src/main/java/teammates/storage/sqlapi/AccountRequestsDb.java

@@ -55,6 +55,14 @@ public AccountRequest createAccountRequest(AccountRequest accountRequest) throws
         return accountRequest;
     }
 
+    /**
+     * Get AccountRequest by {@code id} from the database.
+     */
+    public AccountRequest getAccountRequest(UUID id) {
+        assert id != null;
+        return HibernateUtil.get(AccountRequest.class, id);
+    }
+
     /**
      * Get AccountRequest by {@code email} and {@code institute} from database.
      */

src/test/java/teammates/sqllogic/core/AccountRequestsLogicTest.java

@@ -0,0 +1,51 @@
+package teammates.sqllogic.core;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import java.util.UUID;
+
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+import teammates.common.datatransfer.AccountRequestStatus;
+import teammates.storage.sqlapi.AccountRequestsDb;
+import teammates.storage.sqlentity.AccountRequest;
+import teammates.test.BaseTestCase;
+
+/**
+ * SUT: {@link AccountRequestsLogic}.
+ */
+public class AccountRequestsLogicTest extends BaseTestCase {
+
+    private AccountRequestsLogic accountRequestsLogic = AccountRequestsLogic.inst();
+
+    private AccountRequestsDb accountRequestsDb;
+
+    @BeforeMethod
+    public void setUpMethod() {
+        accountRequestsDb = mock(AccountRequestsDb.class);
+        accountRequestsLogic.initLogicDependencies(accountRequestsDb);
+    }
+
+    @Test
+    public void testGetAccountRequest_nonExistentAccountRequest_returnsNull() {
+        UUID id = UUID.randomUUID();
+        when(accountRequestsDb.getAccountRequest(id)).thenReturn(null);
+        AccountRequest actualAccountRequest = accountRequestsLogic.getAccountRequest(id);
+        verify(accountRequestsDb).getAccountRequest(id);
+        assertNull(actualAccountRequest);
+    }
+
+    @Test
+    public void testGetAccountRequest_existingAccountRequest_getsSuccessfully() {
+        AccountRequest expectedAccountRequest =
+                new AccountRequest("test@gmail.com", "name", "institute", AccountRequestStatus.PENDING, "comments");
+        UUID id = expectedAccountRequest.getId();
+        when(accountRequestsDb.getAccountRequest(id)).thenReturn(expectedAccountRequest);
+        AccountRequest actualAccountRequest = accountRequestsLogic.getAccountRequest(id);
+        verify(accountRequestsDb).getAccountRequest(id);
+        assertEquals(expectedAccountRequest, actualAccountRequest);
+    }
+}

src/test/java/teammates/storage/sqlapi/AccountRequestsDbTest.java

@@ -10,6 +10,7 @@
 import static org.mockito.Mockito.verify;
 
 import java.util.List;
+import java.util.UUID;
 
 import org.mockito.MockedStatic;
 import org.testng.annotations.AfterMethod;
@@ -70,6 +71,26 @@ public void testCreateAccountRequest_accountRequestAlreadyExists_createsSuccessf
         mockHibernateUtil.verify(() -> HibernateUtil.persist(accountRequest));
     }
 
+    @Test
+    public void testGetAccountRequest_nonExistentAccountRequest_returnsNull() {
+        UUID id = UUID.randomUUID();
+        mockHibernateUtil.when(() -> HibernateUtil.get(AccountRequest.class, id)).thenReturn(null);
+        AccountRequest actualAccountRequest = accountRequestDb.getAccountRequest(id);
+        mockHibernateUtil.verify(() -> HibernateUtil.get(AccountRequest.class, id));
+        assertNull(actualAccountRequest);
+    }
+
+    @Test
+    public void testGetAccountRequest_existingAccountRequest_getsSuccessfully() {
+        AccountRequest expectedAccountRequest =
+                new AccountRequest("test@gmail.com", "name", "institute", AccountRequestStatus.PENDING, "comments");
+        UUID id = expectedAccountRequest.getId();
+        mockHibernateUtil.when(() -> HibernateUtil.get(AccountRequest.class, id)).thenReturn(expectedAccountRequest);
+        AccountRequest actualAccountRequest = accountRequestDb.getAccountRequest(id);
+        mockHibernateUtil.verify(() -> HibernateUtil.get(AccountRequest.class, id));
+        assertEquals(expectedAccountRequest, actualAccountRequest);
+    }
+
     @Test
     public void testUpdateAccountRequest_invalidEmail_throwsInvalidParametersException() {
         AccountRequest accountRequestWithInvalidEmail =