public void DatabaseLogger_can_append_to_a_file()
{
using (var context = new SimpleModelContext())
{
var output = CaptureFileOutput(
f =>
{
using (var logger = new DatabaseLogger(f, append: false))
{
logger.StartLogging();
context.Categories.ToArray();
}
using (var logger = new DatabaseLogger(f, append: true))
{
logger.StartLogging();
context.Products.ToArray();
}
});
Assert.Contains("FROM [dbo].[Categories]", output);
Assert.Contains("FROM [dbo].[Products]", output);
}
}
public void DatabaseLogger_can_log_to_a_file()
{
Assert.Contains(
"FROM [dbo].[Products]",
CaptureFileOutput(
f =>
{
using (var logger = new DatabaseLogger(f))
{
using (var context = new SimpleModelContext())
{
logger.StartLogging();
context.Products.ToArray();
}
}
}));
}
public void Logging_can_be_started_and_stopped()
{
using (var context = new SimpleModelContext())
{
var output = CaptureConsoleOutput(
() =>
{
using (var logger = new DatabaseLogger())
{
context.Products.ToArray();
logger.StartLogging();
logger.StopLogging();
context.Products.ToArray();
logger.StartLogging();
context.Categories.ToArray();
logger.StopLogging();
context.Products.ToArray();
}
});
var foundIndex = output.IndexOf("FROM [dbo].[Categories]");
Assert.True(foundIndex > 0);
foundIndex = output.IndexOf("FROM [dbo].[Categories]", foundIndex + 1);
Assert.Equal(-1, foundIndex);
Assert.DoesNotContain("FROM [dbo].[Products]", output);
}
}
public void Dispose_stops_logging()
{
using (var context = new SimpleModelContext())
{
var output = CaptureConsoleOutput(
() =>
{
using (var logger = new DatabaseLogger())
{
logger.StartLogging();
context.Categories.ToArray();
}
context.Products.ToArray();
});
Assert.Contains("FROM [dbo].[Categories]", output);
Assert.DoesNotContain("FROM [dbo].[Products]", output);
}
}
public void Starting_is_no_op_if_already_started_and_likewise_for_stopping()
{
using (var context = new SimpleModelContext())
{
var output = CaptureConsoleOutput(
() =>
{
using (var logger = new DatabaseLogger())
{
logger.StopLogging();
context.Products.ToArray();
logger.StartLogging();
logger.StartLogging();
context.Categories.ToArray();
logger.StopLogging();
logger.StopLogging();
context.Products.ToArray();
}
});
Assert.Contains("FROM [dbo].[Categories]", output);
Assert.DoesNotContain("FROM [dbo].[Products]", output);
}
}
[Fact] // CodePlex 2568
public void DatabaseLogger_can_be_used_concurrently()
{
CaptureFileOutput(
f =>
{
using (var logger = new DatabaseLogger(f))
{
logger.StartLogging();
ExecuteInParallel(
() =>
{
using (var context = new SimpleModelContext())
{
for (var i = 0; i < 200; i++)
{
context.Products.AsNoTracking().Load();
}
}
}, 30);
}
});
}