public async Task DynamoDBDataManager_UpsertItemAsync()
{
var expression = "attribute_not_exists(PartitionKey) AND attribute_not_exists(RowKey)";
var toPersist = GenerateNewData();
toPersist.StringData = "Create";
await manager.PutEntryAsync(UnitTestDynamoDBStorage.INSTANCE_TABLE_NAME, GetValues(toPersist, true), expression);
toPersist.StringData = "Replaced";
await manager.UpsertEntryAsync(UnitTestDynamoDBStorage.INSTANCE_TABLE_NAME, GetKeys(toPersist), GetValues(toPersist));
var persisted = await manager.ReadSingleEntryAsync(UnitTestDynamoDBStorage.INSTANCE_TABLE_NAME, GetKeys(toPersist), response => new UnitTestDynamoDBTableData(response));
Assert.Equal("Replaced", persisted.StringData);
Assert.True(persisted.ETag == 0); //Yes, ETag didn't changed cause we didn't
persisted.StringData = "Updated";
var persistedEtag = persisted.ETag;
expression = $"ETag = :OldETag";
persisted.ETag++; //Increase ETag
var expValues = new Dictionary <string, AttributeValue> {
{ ":OldETag", new AttributeValue {
N = persistedEtag.ToString()
} }
};
await manager.UpsertEntryAsync(UnitTestDynamoDBStorage.INSTANCE_TABLE_NAME, GetKeys(persisted), GetValues(persisted), expression, expValues);
persisted = await manager.ReadSingleEntryAsync(UnitTestDynamoDBStorage.INSTANCE_TABLE_NAME, GetKeys(toPersist), response => new UnitTestDynamoDBTableData(response));
Assert.Equal("Updated", persisted.StringData);
Assert.NotEqual(persistedEtag, persisted.ETag); //Now ETag changed cause we did it
await Assert.ThrowsAsync <ConditionalCheckFailedException>(async() =>
{
await manager.UpsertEntryAsync(UnitTestDynamoDBStorage.INSTANCE_TABLE_NAME, GetKeys(toPersist), GetValues(toPersist), expression, expValues);
});
}
