public async Task RunScalingLogic_AtMinimumSize_NoChange()
{
// Arrange
var connectionPool = CreateMockConnectionPool(
2, 2, 5, 0,
Enumerable.Range(1, 2).Select(_ => CreateMockConnection(TimeSpan.Zero)));
var controller = new MockController();
// Act
await controller.RunScalingLogicPublic(connectionPool.Object);
// Assert
connectionPool.Verify(
m => m.ScaleAsync(It.IsAny <int>()),
Times.Never);
}
public async Task RunScalingLogic_AboveBackPressureThreshold_ScaleUp()
{
// Arrange
var connectionPool = CreateMockConnectionPool(
2, 2, 5, 5,
Enumerable.Range(1, 2).Select(_ => CreateMockConnection(TimeSpan.Zero)));
var controller = new MockController
{
BackPressureThreshold = 4
};
// Act
await controller.RunScalingLogicPublic(connectionPool.Object);
// Assert
connectionPool.Verify(
m => m.ScaleAsync(1),
Times.Once);
}
public async Task RunScalingLogic_AtOrBelowBackPressureThreshold_NoChange(int backPressure)
{
// Arrange
var connectionPool = CreateMockConnectionPool(
5, 2, 5, backPressure,
Enumerable.Range(1, 2).Select(_ => CreateMockConnection(TimeSpan.Zero)));
var controller = new MockController
{
BackPressureThreshold = 4
};
// Act
await controller.RunScalingLogicPublic(connectionPool.Object);
// Assert
connectionPool.Verify(
m => m.ScaleAsync(It.IsAny <int>()),
Times.Never);
}
public async Task RunScalingLogic_AllConnectionsBelowTimeout_NoChange(int lastActivitySeconds)
{
// Arrange
var connectionPool = CreateMockConnectionPool(
2, 2, 5, 0,
Enumerable.Range(1, 2).Select(_ => CreateMockConnection(TimeSpan.FromSeconds(lastActivitySeconds))));
var controller = new MockController
{
IdleConnectionTimeout = TimeSpan.FromSeconds(60)
};
// Act
await controller.RunScalingLogicPublic(connectionPool.Object);
// Assert
connectionPool.Verify(
m => m.ScaleAsync(It.IsAny <int>()),
Times.Never);
}
public async Task RunScalingLogic_BelowMinimumSize_ScaleUp()
{
// Arrange
const int minConnectionPoolSize = 2;
var connectionPool = CreateMockConnectionPool(
0, minConnectionPoolSize, 5, 0,
Enumerable.Range(1, 1).Select(_ => CreateMockConnection(TimeSpan.Zero)));
var controller = new MockController
{
BackPressureThreshold = 4
};
// Act
await controller.RunScalingLogicPublic(connectionPool.Object);
// Assert
connectionPool.Verify(
m => m.ScaleAsync(minConnectionPoolSize),
Times.Once);
}
public async Task RunScalingLogic_OneConnectionAboveTimeout_ScaleDown()
{
// Arrange
var connectionPool = CreateMockConnectionPool(
5, 2, 5, 0,
Enumerable.Range(1, 5).Select(i =>
CreateMockConnection(i < 5 ? TimeSpan.Zero : TimeSpan.FromSeconds(60))));
var controller = new MockController
{
IdleConnectionTimeout = TimeSpan.FromSeconds(60)
};
// Act
await controller.RunScalingLogicPublic(connectionPool.Object);
// Assert
connectionPool.Verify(
m => m.ScaleAsync(-1),
Times.Once);
}