public async Task SaveChanges_DryRun_NoStackChangesMade()
{
// arrange
var alarm = Alarm();
SetupListStacksToReturnStackNames();
var sut = new CloudFormationAlarmCreator(
new CloudformationStackDeployer(
new ConsoleAlarmLogger(false),
_cloudFormationMock.Object,
_s3Mock.Object,
null));
sut.AddAlarm(alarm);
// act
await sut.SaveChanges(true);
// assert
_cloudFormationMock
.Verify(x => x.CreateStackAsync(
It.IsAny <CreateStackRequest>(),
It.IsAny <CancellationToken>()), Times.Never());
}
public async Task SaveChanges_StackDoesNotExist_StackIsCreated()
{
// arrange
var alarm = Alarm();
var stackName = ExpectedStackName(alarm.AlertingGroup);
SetupListStacksToReturnStackNames();
SetStatusForStackName(stackName, "CREATE_COMPLETE");
var sut = new CloudFormationAlarmCreator(
new CloudformationStackDeployer(
new ConsoleAlarmLogger(false),
_cloudFormationMock.Object,
_s3Mock.Object,
null,
TimeSpan.FromMilliseconds(5),
TimeSpan.FromMilliseconds(5)
));
sut.AddAlarm(alarm);
// act
await sut.SaveChanges(false);
// assert
_cloudFormationMock
.Verify(x => x.CreateStackAsync(
It.Is <CreateStackRequest>(s => s.StackName == stackName),
It.IsAny <CancellationToken>()));
}
public async Task SaveChanges_SmallTemplate_SubmitsDirectly()
{
// arrange
var alarm = Alarm();
var stackName = ExpectedStackName(alarm.AlertingGroup);
SetupListStacksToReturnStackNames();
SetupStackStatusSequence(stackName, new List <string> {
"CREATE_COMPLETE"
});
var s3Location = new S3Location("bucket", "s3/path");
var deployer = MakeDeployer(s3Location, TimeSpan.Zero, TimeSpan.FromMinutes(1));
var sut = new CloudFormationAlarmCreator(deployer, new ConsoleAlarmLogger(false));
sut.AddAlarm(alarm);
// act
await sut.SaveChanges(false);
// assert
_s3Mock
.Verify(x => x.PutObjectAsync(
It.IsAny <PutObjectRequest>(),
It.IsAny <CancellationToken>()), Times.Never);
_cloudFormationMock
.Verify(x => x.CreateStackAsync(
It.Is <CreateStackRequest>(s => s.StackName == stackName &&
s.TemplateURL == null &&
!string.IsNullOrWhiteSpace(s.TemplateBody)),
It.IsAny <CancellationToken>()), Times.Exactly(1));
}
public async Task SaveChanges_LargeTemplate_SubmitsViaS3()
{
// arrange
var alarms = Enumerable.Range(0, 120)
.Select(x => Alarm($"alarm-{x}"))
.ToList();
var stackName = ExpectedStackName(alarms.First().AlertingGroup);
SetupListStacksToReturnStackNames();
SetupStackStatusSequence(stackName, new List <string> {
"CREATE_COMPLETE"
});
var s3Location = new S3Location("bucket", "s3/path");
var sut = new CloudFormationAlarmCreator(
new CloudformationStackDeployer(
new ConsoleAlarmLogger(false),
_cloudFormationMock.Object,
_s3Mock.Object,
s3Location,
TimeSpan.Zero,
TimeSpan.FromMinutes(1)
));
foreach (var alarm in alarms)
{
sut.AddAlarm(alarm);
}
// act
await sut.SaveChanges(false);
// assert
var s3Path = $"{s3Location.Path}/{stackName}.json";
_s3Mock
.Verify(x => x.PutObjectAsync(
It.Is <PutObjectRequest>(r => r.BucketName == s3Location.BucketName && r.Key == s3Path),
It.IsAny <CancellationToken>()));
var expectedStackUrl = $"https://s3.amazonaws.com/{s3Location.BucketName}/{s3Path}";
_cloudFormationMock
.Verify(x => x.CreateStackAsync(
It.Is <CreateStackRequest>(s => s.StackName == stackName &&
s.TemplateURL == expectedStackUrl &&
s.TemplateBody == null),
It.IsAny <CancellationToken>()), Times.Exactly(1));
}
public async Task SaveChanges_ChangesToStackSubmitted_WaitsForTargetStatus()
{
// arrange
var alarm = Alarm();
var stackName = ExpectedStackName(alarm.AlertingGroup);
SetupListStacksToReturnStackNames();
SetupStackStatusSequence(stackName, new List <string> {
"CREATE_IN_PROGRESS", "CREATE_IN_PROGRESS", "CREATE_COMPLETE"
});
var statusCheckDelay = TimeSpan.FromMilliseconds(200);
var sut = new CloudFormationAlarmCreator(
new CloudformationStackDeployer(
new ConsoleAlarmLogger(false),
_cloudFormationMock.Object,
_s3Mock.Object,
null,
statusCheckDelay,
TimeSpan.FromMinutes(5)));
sut.AddAlarm(alarm);
var start = DateTime.UtcNow;
// act
await sut.SaveChanges(false);
// assert
var actualWaitMillis = (DateTime.UtcNow - start).TotalMilliseconds;
var expectedDelayMillis = statusCheckDelay.TotalMilliseconds * 3;
Assert.That(actualWaitMillis, Is.GreaterThanOrEqualTo(expectedDelayMillis));
// this is pretty rough because other parts of the method takes a while, just want to check the time isn't stupidly long
var maxDelayMillis = expectedDelayMillis * 4;
Assert.That(actualWaitMillis, Is.LessThanOrEqualTo(maxDelayMillis));
_cloudFormationMock
.Verify(x => x.DescribeStacksAsync(
It.Is <DescribeStacksRequest>(s => s.StackName == stackName),
It.IsAny <CancellationToken>()), Times.Exactly(3));
}
public void SaveChanges_CloudformationFails_Throws()
{
// arrange
var alarm = Alarm();
SetupListStacksToReturnStackNames();
SetupCreateStackAsyncToFail();
var deployer = MakeDeployer();
var sut = new CloudFormationAlarmCreator(deployer, new ConsoleAlarmLogger(false));
sut.AddAlarm(alarm);
// act
var ex = Assert.ThrowsAsync <WatchmanException>(() => sut.SaveChanges(false));
Assert.That(ex.Message, Is.EqualTo("1 stacks failed to deploy"));
}
