public async Task GetResourceAsync_ReturnsNullIfSdkThrowsNotFound()
{
var dynamoDbFake = new Mock <IAmazonDynamoDB>();
dynamoDbFake
.Setup(s => s.ListTablesAsync(
It.Is <string>(r => r == null), It.IsAny <CancellationToken>()
))
.ReturnsAsync(new ListTablesResponse()
{
TableNames = new List <string>()
{
"banana"
}
});
dynamoDbFake
.Setup(s => s.DescribeTableAsync("banana", It.IsAny <CancellationToken>()))
.Throws(new ResourceNotFoundException("Table not found"))
//so we know we actually threw this error
.Verifiable();
var sut = new TableDescriptionSource(dynamoDbFake.Object);
var result = await sut.GetResourceAsync("banana");
dynamoDbFake.Verify();
Assert.Null(result);
}
public void Setup()
{
var firstTableName = "Table-1";
_firstPage = new ListTablesResponse
{
LastEvaluatedTableName = firstTableName,
TableNames = new List <string>
{
firstTableName
}
};
var secondTableName = "Table-2";
_secondPage = new ListTablesResponse
{
LastEvaluatedTableName = secondTableName,
TableNames = new List <string>
{
secondTableName
}
};
_thirdPage = new ListTablesResponse
{
TableNames = new List <string>
{
"Table-3"
}
};
var describeSecondTableResponse = new DescribeTableResponse
{
Table = new TableDescription
{
TableName = secondTableName
}
};
var dynamoDbMock = new Mock <IAmazonDynamoDB>();
dynamoDbMock.Setup(s => s.ListTablesAsync(
It.Is <string>(r => r == null), It.IsAny <CancellationToken>()
)).ReturnsAsync(_firstPage);
dynamoDbMock.Setup(s => s.ListTablesAsync(
It.Is <string>(r => r == firstTableName),
It.IsAny <CancellationToken>()
)).ReturnsAsync(_secondPage);
dynamoDbMock.Setup(s => s.ListTablesAsync(
It.Is <string>(r => r == secondTableName),
It.IsAny <CancellationToken>()
)).ReturnsAsync(_thirdPage);
dynamoDbMock.Setup(s => s.DescribeTableAsync(It.Is <string>(r => r == secondTableName),
It.IsAny <CancellationToken>()))
.ReturnsAsync(describeSecondTableResponse);
_tableDescriptionSource = new TableDescriptionSource(dynamoDbMock.Object);
}
public async Task IgnoresNamedEntitiesThatDoNotExist()
{
// arrange
var stack = new Mock <ICloudformationStackDeployer>();
var dynamoClient = CreateDynamoClientForTables(new[]
{
new TableDescription()
{
TableName = "first-dynamo-table",
ProvisionedThroughput = new ProvisionedThroughputDescription()
{
ReadCapacityUnits = 10,
WriteCapacityUnits = 10
}
}
});
var source = new TableDescriptionSource(dynamoClient);
var creator = new CloudFormationAlarmCreator(stack.Object, new ConsoleAlarmLogger(true));
var config = ConfigHelper.CreateBasicConfiguration("test", "group-suffix", "DynamoDb", new List <ResourceThresholds>()
{
new ResourceThresholds()
{
Name = "non-existant-table"
}
});
var sut = IoCHelper.CreateSystemUnderTest(
source,
new DynamoDbDataProvider(),
new DynamoDbDataProvider(),
WatchmanServiceConfigurationMapper.MapDynamoDb,
creator,
ConfigHelper.ConfigLoaderFor(config)
);
// act
await sut.LoadAndGenerateAlarms(RunMode.GenerateAlarms);
// assert
stack
.Verify(x => x.DeployStack(
It.IsAny <string>(),
It.IsAny <string>(),
It.IsAny <bool>()
), Times.Never);
}
public async Task AlarmCreatedWithCorrectProperties()
{
// arrange
var stack = new FakeStackDeployer();
var dynamoClient = CreateDynamoClientForTables(new[]
{
new TableDescription()
{
TableName = "first-dynamo-table",
ProvisionedThroughput = new ProvisionedThroughputDescription()
{
ReadCapacityUnits = 100,
WriteCapacityUnits = 200
}
}
});
var source = new TableDescriptionSource(dynamoClient);
var creator = new CloudFormationAlarmCreator(stack, new ConsoleAlarmLogger(true));
var config = ConfigHelper.CreateBasicConfiguration("test", "group-suffix", "DynamoDb", new List <ResourceThresholds>()
{
new ResourceThresholds()
{
Name = "first-dynamo-table"
}
});
var sut = IoCHelper.CreateSystemUnderTest(
source,
new DynamoDbDataProvider(),
new DynamoDbDataProvider(),
WatchmanServiceConfigurationMapper.MapDynamoDb,
creator, ConfigHelper.ConfigLoaderFor(config)
);
// act
await sut.LoadAndGenerateAlarms(RunMode.GenerateAlarms);
// assert
const decimal defaultCapacityThresholdFraction = 0.8m;
const int defaultThrottleThreshold = 2;
var alarmsByTable = stack
.Stack("Watchman-test")
.AlarmsByDimension("TableName");
Assert.That(alarmsByTable.ContainsKey("first-dynamo-table"), Is.True);
var alarms = alarmsByTable["first-dynamo-table"];
Assert.That(alarms.Exists(
alarm =>
alarm.Properties["MetricName"].Value <string>() == "ConsumedReadCapacityUnits" &&
alarm.Properties["AlarmName"].Value <string>().Contains("ConsumedReadCapacityUnitsHigh") &&
alarm.Properties["Threshold"].Value <int>() == 100 * defaultCapacityThresholdFraction &&
alarm.Properties["Period"].Value <int>() == 60 &&
alarm.Properties["ComparisonOperator"].Value <string>() == "GreaterThanOrEqualToThreshold" &&
alarm.Properties["Statistic"].Value <string>() == "Sum" &&
alarm.Properties["Namespace"].Value <string>() == AwsNamespace.DynamoDb
)
);
Assert.That(alarms.Exists(
alarm =>
alarm.Properties["MetricName"].Value <string>() == "ConsumedWriteCapacityUnits" &&
alarm.Properties["AlarmName"].Value <string>().Contains("ConsumedWriteCapacityUnitsHigh") &&
alarm.Properties["Threshold"].Value <int>() == 200 * defaultCapacityThresholdFraction &&
alarm.Properties["Period"].Value <int>() == 60 &&
alarm.Properties["ComparisonOperator"].Value <string>() == "GreaterThanOrEqualToThreshold" &&
alarm.Properties["Statistic"].Value <string>() == "Sum" &&
alarm.Properties["Namespace"].Value <string>() == AwsNamespace.DynamoDb
)
);
Assert.That(alarms.Exists(
alarm =>
alarm.Properties["MetricName"].Value <string>() == "ThrottledRequests" &&
alarm.Properties["AlarmName"].Value <string>().Contains("ThrottledRequestsHigh") &&
alarm.Properties["Threshold"].Value <int>() == defaultThrottleThreshold &&
alarm.Properties["Period"].Value <int>() == 60 &&
alarm.Properties["ComparisonOperator"].Value <string>() == "GreaterThanOrEqualToThreshold" &&
alarm.Properties["Statistic"].Value <string>() == "Sum" &&
alarm.Properties["Namespace"].Value <string>() == AwsNamespace.DynamoDb
)
);
}
