Ensuring the removal of test accounts

Author: hiranya911

FirebaseAdmin/FirebaseAdmin.IntegrationTests/FirebaseAuthTest.cs

@@ -14,10 +14,10 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Net.Http;
 using System.Text;
 using System.Threading.Tasks;
-using FirebaseAdmin;
 using FirebaseAdmin.Auth;
 using Google.Apis.Auth.OAuth2;
 using Google.Apis.Util;
@@ -288,32 +288,39 @@ await Assert.ThrowsAsync<FirebaseException>(
         public async Task ListUsers()
         {
             var users = new List<string>();
-            for (int i = 0; i < 3; i++)
+            try
             {
-                var user = await FirebaseAuth.DefaultInstance.CreateUserAsync(new UserRecordArgs()
+                for (int i = 0; i < 3; i++)
                 {
-                    Password = "password",
-                });
-                users.Add(user.Uid);
-            }
+                    var user = await FirebaseAuth.DefaultInstance.CreateUserAsync(new UserRecordArgs()
+                    {
+                        Password = "password",
+                    });
+                    users.Add(user.Uid);
+                }
 
-            var pagedEnumerable = FirebaseAuth.DefaultInstance.ListUsersAsync(null);
-            var enumerator = pagedEnumerable.GetEnumerator();
+                var pagedEnumerable = FirebaseAuth.DefaultInstance.ListUsersAsync(null);
+                var enumerator = pagedEnumerable.GetEnumerator();
 
-            var listedUsers = new List<string>();
-            while (await enumerator.MoveNext())
-            {
-                var uid = enumerator.Current.Uid;
-                if (users.Contains(uid) && !listedUsers.Contains(uid))
+                var listedUsers = new List<string>();
+                while (await enumerator.MoveNext())
                 {
-                    listedUsers.Add(uid);
-                    Assert.NotNull(enumerator.Current.PasswordHash);
-                    Assert.NotNull(enumerator.Current.PasswordSalt);
+                    var uid = enumerator.Current.Uid;
+                    if (users.Contains(uid) && !listedUsers.Contains(uid))
+                    {
+                        listedUsers.Add(uid);
+                        Assert.NotNull(enumerator.Current.PasswordHash);
+                        Assert.NotNull(enumerator.Current.PasswordSalt);
+                    }
                 }
-            }
 
-            Assert.Equal(3, listedUsers.Count);
-            users.ForEach(async (uid) => await FirebaseAuth.DefaultInstance.DeleteUserAsync(uid));
+                Assert.Equal(3, listedUsers.Count);
+            }
+            finally
+            {
+                var deleteTasks = users.Select((uid) => FirebaseAuth.DefaultInstance.DeleteUserAsync(uid));
+                await Task.WhenAll(deleteTasks);
+            }
         }
 
         private static async Task<string> SignInWithCustomTokenAsync(string customToken)