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Trying snapshots #2

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Trying snapshots #2

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2 changes: 1 addition & 1 deletion ContosoUniversity.IntegrationTests/IntegrationTestBase.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ namespace ContosoUniversity.IntegrationTests
{
public abstract class IntegrationTestBase : IAsyncLifetime
{
public virtual Task InitializeAsync() => SliceFixture.ResetCheckpoint();
public virtual async Task InitializeAsync() => await SliceFixture.ResetCheckpoint();

public virtual Task DisposeAsync() => Task.FromResult(0);
}
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51 changes: 50 additions & 1 deletion ContosoUniversity.IntegrationTests/SliceFixture.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
using System;
using System.Data.SqlClient;
using System.IO;
using System.Threading.Tasks;
using ContosoUniversity.Data;
Expand All @@ -19,6 +20,9 @@ public class SliceFixture
private static readonly Checkpoint _checkpoint;
private static readonly IConfigurationRoot _configuration;
private static readonly IServiceScopeFactory _scopeFactory;
private static readonly string TestConnectionString;
private static readonly string MasterConnectionString;
private static string TestDbName;

static SliceFixture()
{
Expand All @@ -37,10 +41,55 @@ static SliceFixture()
startup.ConfigureServices(services);
var provider = services.BuildServiceProvider();
_scopeFactory = provider.GetService<IServiceScopeFactory>();

TestConnectionString = _configuration.GetConnectionString("DefaultConnection");
var connStringBuilder = new SqlConnectionStringBuilder(TestConnectionString);
TestDbName = connStringBuilder.InitialCatalog;
connStringBuilder.InitialCatalog = "master";
MasterConnectionString = connStringBuilder.ToString();

_checkpoint = new Checkpoint();

CreateSnapshot();
}

public static Task ResetCheckpoint() => _checkpoint.Reset(_configuration.GetConnectionString("DefaultConnection"));
private static void CreateSnapshot()
{
_checkpoint.Reset(TestConnectionString).GetAwaiter().GetResult();

using (var conn = new SqlConnection(MasterConnectionString))
{
conn.Open();
var snapshotDbName = TestDbName + "-Snapshot";
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = $"DROP DATABASE IF EXISTS [{snapshotDbName}]";
cmd.ExecuteNonQuery();
}
using (var cmd = conn.CreateCommand())
{
var filename = Path.Combine(Environment.CurrentDirectory, $"{snapshotDbName}.ss");
cmd.CommandText = $"CREATE DATABASE [{snapshotDbName}] ON (Name = [{TestDbName}], Filename='{filename}') AS SNAPSHOT OF [{TestDbName}]";
cmd.ExecuteNonQuery();
}
}
}

public static async Task ResetCheckpoint()
{
using (var conn = new SqlConnection(MasterConnectionString))
{
await conn.OpenAsync();
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = $@"ALTER DATABASE [{TestDbName}] SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
RESTORE DATABASE [{TestDbName}] FROM DATABASE_SNAPSHOT = '{TestDbName}-Snapshot';
ALTER DATABASE [{TestDbName}] SET MULTI_USER;";
await cmd.ExecuteNonQueryAsync();
}
}
}
//=> await _checkpoint.Reset(_configuration.GetConnectionString("DefaultConnection"));

public static async Task ExecuteScopeAsync(Func<IServiceProvider, Task> action)
{
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