From ed8bae9cf7fd22300678d718cfee1913209f2cd0 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Wed, 20 Nov 2019 00:28:53 +0800
Subject: Clean and refactor tests.

---
 Timeline.Tests/Helpers/TestDatabase.cs | 89 ++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 Timeline.Tests/Helpers/TestDatabase.cs

(limited to 'Timeline.Tests/Helpers/TestDatabase.cs')

diff --git a/Timeline.Tests/Helpers/TestDatabase.cs b/Timeline.Tests/Helpers/TestDatabase.cs
new file mode 100644
index 00000000..10224c27
--- /dev/null
+++ b/Timeline.Tests/Helpers/TestDatabase.cs
@@ -0,0 +1,89 @@
+using Microsoft.Data.Sqlite;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Timeline.Entities;
+using Timeline.Models;
+using Timeline.Services;
+
+namespace Timeline.Tests.Helpers
+{
+    public class TestDatabase : IDisposable
+    {
+        // currently password service is thread safe, so we share a static one.
+        private static PasswordService PasswordService { get; } = new PasswordService();
+
+        private static User CreateEntityFromMock(MockUser user)
+        {
+            return new User
+            {
+                Name = user.Username,
+                EncryptedPassword = PasswordService.HashPassword(user.Password),
+                RoleString = UserRoleConvert.ToString(user.Administrator),
+                Avatar = null
+            };
+        }
+
+        private static IEnumerable<User> CreateDefaultMockEntities()
+        {
+            // emmmmmmm. Never reuse the user instances because EF Core uses them, which will cause strange things.
+            yield return CreateEntityFromMock(MockUser.User);
+            yield return CreateEntityFromMock(MockUser.Admin);
+        }
+
+        private static void InitDatabase(DatabaseContext context)
+        {
+            context.Database.EnsureCreated();
+            context.Users.AddRange(CreateDefaultMockEntities());
+            context.SaveChanges();
+        }
+
+        public SqliteConnection Connection { get; }
+        public DatabaseContext Context { get; }
+
+        public TestDatabase()
+        {
+            Connection = new SqliteConnection("Data Source=:memory:;");
+            Connection.Open();
+
+            var options = new DbContextOptionsBuilder<DatabaseContext>()
+                .UseSqlite(Connection)
+                .Options;
+
+            Context = new DatabaseContext(options);
+
+            InitDatabase(Context);
+        }
+
+        private List<MockUser> _extraMockUsers;
+
+        public IReadOnlyList<MockUser> ExtraMockUsers => _extraMockUsers;
+
+        public void CreateExtraMockUsers(int count)
+        {
+            if (count <= 0)
+                throw new ArgumentOutOfRangeException(nameof(count), count, "Additional user count must be bigger than 0.");
+            if (_extraMockUsers != null)
+                throw new InvalidOperationException("Already create mock users.");
+
+            _extraMockUsers = new List<MockUser>();
+            for (int i = 0; i < count; i++)
+            {
+                _extraMockUsers.Add(new MockUser($"user{i}", $"password", false));
+            }
+
+            Context.AddRange(_extraMockUsers.Select(u => CreateEntityFromMock(u)));
+            Context.SaveChanges();
+        }
+
+        public void Dispose()
+        {
+            Context.Dispose();
+
+            Connection.Close();
+            Connection.Dispose();
+        }
+
+    }
+}
-- 
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