public async Task Migrations_in_a_race_do_not_throw()
{
InitializeDatabase <MigrationsTestEventStore>();
var columnName = Any.CamelCaseName(3);
var barrier = new Barrier(2);
var migrator = new AnonymousMigrator(c =>
{
c.Execute(string.Format(@"alter table [eventstore].[events] add {0} nvarchar(50) null", columnName));
barrier.SignalAndWait(10000);
}, version);
var task1 = Task.Run(() => InitializeDatabase <MigrationsTestEventStore>(migrator));
var task2 = Task.Run(() => InitializeDatabase <MigrationsTestEventStore>(migrator));
await Task.WhenAll(task1, task2);
using (var context = new MigrationsTestEventStore())
{
var result = context.QueryDynamic(
@"SELECT * FROM sys.columns WHERE name='@columnName'",
new Dictionary <string, object> {
{ "columnName", columnName }
}).Single();
result.Should().BeEmpty();
}
}
public void When_a_migration_throws_then_the_change_is_rolled_back()
{
InitializeDatabase <MigrationsTestEventStore>();
var columnName = Any.CamelCaseName(3);
try
{
InitializeDatabase <MigrationsTestEventStore>(
new AnonymousMigrator(c =>
{
c.Execute(string.Format(@"alter table [eventstore].[events] add {0} nvarchar(50) null", columnName));
throw new DataMisalignedException();
}, version));
}
catch (DataMisalignedException)
{
}
GetAppliedVersions <MigrationsTestEventStore>().Should().NotContain(s => s == version.ToString());
using (var context = new MigrationsTestEventStore())
{
var result = context.QueryDynamic(
@"SELECT * FROM sys.columns WHERE name='@columnName'",
new Dictionary <string, object> {
{ "columnName", columnName }
}).Single();
result.Should().BeEmpty();
}
}
public async Task Database_creations_in_a_race_do_not_throw()
{
var task1 = Task.Run(() => InitializeDatabase <MigrationsTestEventStore>());
var task2 = Task.Run(() => InitializeDatabase <MigrationsTestEventStore>());
await Task.WhenAll(task1, task2);
using (var context = new MigrationsTestEventStore())
{
context.Database.Exists().Should().BeTrue();
}
}