Package com.exonum.binding.service

Class NodeFake

java.lang.Object

com.exonum.binding.service.NodeFake

All Implemented Interfaces:

Node

public final class NodeFake
extends Object
implements Node

An implementation of a Node interface for testing purposes. Use it in tests of your handlers that need some data in the database:

 try (MemoryDb db = MemoryDb.newInstance();
      Cleaner cleaner = new Cleaner()) {

   // Setup database to include some test data
   Fork fork = db.createFork(cleaner);
   MapIndex balance = MapIndexProxy.newInstance("balance", fork, stringSerializer,
       stringSerializer);
   balance.put("John Doe", "$1000.00");
   db.merge(fork);

   // Create a node fake from the database
   NodeFake node = new NodeFake(db);

   WalletController controller = new WalletController(node);

   assertThat(controller.getBalance("John Doe"), equalTo("$1000.00"));
 }
 

Constructor Summary

Constructors

Constructor	Description
NodeFake(MemoryDb database)	Creates a new node fake with the given database and an empty public key.
NodeFake(MemoryDb database, PublicKey publicKey)	Creates a new node fake with the given database.

Method Summary

Modifier and Type	Method	Description
MemoryDb	getDatabase()	Returns the underlying database.
PublicKey	getPublicKey()	Returns the service public key of this node.
HashCode	submitTransaction(RawTransaction transaction)	Returns a zero hash always, ignoring the transaction.
<ResultT> ResultT	withSnapshot(Function<Snapshot,ResultT> snapshotFunction)	Performs a given function with a snapshot of the current database state.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NodeFake

public NodeFake(MemoryDb database)

Creates a new node fake with the given database and an empty public key.

Parameters:

database - a database to provide snapshots of

NodeFake

public NodeFake(MemoryDb database,
                PublicKey publicKey)

Creates a new node fake with the given database.

Parameters:

database - a database to provide snapshots of

publicKey - a public key of the node

Method Detail

submitTransaction

public HashCode submitTransaction(RawTransaction transaction)

Returns a zero hash always, ignoring the transaction.

Specified by:

submitTransaction in interface Node

Parameters:

transaction - a transaction to send

Returns:

hash of the transaction message created by the framework

Throws:

NullPointerException - if the transaction is null

See Also:

Blockchain.getTxMessages()

withSnapshot

public <ResultT> ResultT withSnapshot(Function<Snapshot,ResultT> snapshotFunction)

Description copied from interface: Node

Performs a given function with a snapshot of the current database state.

Specified by:

withSnapshot in interface Node

Type Parameters:

ResultT - a type the function returns

Parameters:

snapshotFunction - a function to execute

Returns:

the result of applying the given function to the database state

getPublicKey

public PublicKey getPublicKey()

Description copied from interface: Node

Returns the service public key of this node. The corresponding private key is used for signing transactions in Node.submitTransaction(RawTransaction).

This key is stored under "service_public_key" key in the node configuration file.

Specified by:

getPublicKey in interface Node

getDatabase

public MemoryDb getDatabase()

Returns the underlying database.