com.exonum.binding.service

Class NodeFake

java.lang.Object

com.exonum.binding.service.NodeFake

All Implemented Interfaces:

Node

public final class NodeFake
extends java.lang.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 and Description
NodeFake(MemoryDb database) Creates a new node fake with the given database and an empty public key.
NodeFake(MemoryDb database, byte[] publicKey) Creates a new node fake with the given database.

Method Summary

Modifier and Type	Method and Description
MemoryDb	getDatabase() Returns the underlying database.
byte[]	getPublicKey() Returns the public key of this node.
void	submitTransaction(Transaction transaction) A no-op.
<ResultT> ResultT	withSnapshot(java.util.function.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,
                byte[] 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 void submitTransaction(Transaction transaction)

A no-op.

Specified by:

submitTransaction in interface Node

Parameters:

transaction - a transaction to send

Throws:

java.lang.NullPointerException - if the transaction is null

withSnapshot

public <ResultT> ResultT withSnapshot(java.util.function.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 byte[] getPublicKey()

Description copied from interface: Node

Returns the public key of this node.

Specified by:

getPublicKey in interface Node

getDatabase

public MemoryDb getDatabase()

Returns the underlying database.