zio.dynamodb

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A Fake implementation of DynamoDBExecutor.Service that currently has the very modest aspiration of providing bare minimum functionality to enable internal unit tests and to enable simple end to end examples that can serve as documentation. Limited CRUD functionality is supported hence some features are currently not supported or have restrictions.

• Supported
  • CRUD operations GetItem, PutItem, DeleteItem, BatchGetItem, BatchWriteItem
• Limited support
  • Primary Keys - only the partition key can be specified and is only checked for equality
• Not currently supported
  • Projections - all fields are returned for all queries
  • Expressions - these include KeyConditionExpression's, ConditionExpression's, ProjectionExpression's, UpdateExpression's
  • Create table, Delete table
  • UpdateItem - this is a more complex case as it uses an expression to specify the update
  • Indexes in ScanSome, ScanAll, QuerySome, QueryAll

'''Usage''': DynamoDBExecutor.test provides you the test DB instance in a ZLayer. Tables are created using the addTable method in the test controller service TestDynamoDBExecutor. You specify a table, a single primary and a var arg list of primary key/item pairs.

testM("getItem") {
 for {
   _ <- TestDynamoDBExecutor.addTable("tableName1", primaryKeyFieldName = "k1", primaryKey1 -> item1, primaryKey1_2 -> item1_2)
   result  <- GetItem(key = primaryKey1, tableName = tableName1).execute
   expected = Some(item1)
 } yield assert(result)(equalTo(expected))
}.provideLayer(DynamoDBExecutor.test)

Reads stream using function pk to determine the primary key which is then used to create a BatchGetItem request. Stream is batched into groups of 100 items in a BatchGetItem and executed using the provided DynamoDBExecutor service Returns a tuple of (A, Option[B]) where the option is None if the item is not found - this enables "LEFT outer join" like functionality

Reads stream using function pk to determine the primary key which is then used to create a BatchGetItem request. Stream is batched into groups of 100 items in a BatchGetItem and executed using the provided DynamoDBExecutor service

Reads stream and uses function f for creating a BatchWrite request that is executes for side effects. Stream is batched into groups of 25 items in a BatchWriteItem and executed using the DynamoDBExecutor service provided in the environment.