Package com.exonum.binding.core.service

Class NodeFake

  • All Implemented Interfaces:
    Node, AutoCloseable
    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 (TemporaryDb db = TemporaryDb.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 Detail

      • NodeFake

        public NodeFake​(TemporaryDb database,
                String serviceName)
        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​(TemporaryDb database,
                String serviceName,
                com.exonum.binding.common.crypto.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 com.exonum.binding.common.hash.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()

      • withBlockchainData

        public <ResultT> ResultT withBlockchainData​(Function<BlockchainData,​ResultT> snapshotFunction)
        Description copied from interface: Node
        Performs the given function with a snapshot of the current database state.
        Specified by:
        withBlockchainData 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
        See Also:
        Node.withServiceData(Function)

      • getPublicKey

        public com.exonum.binding.common.crypto.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 TemporaryDb getDatabase()
        Returns the underlying database.

      • close

        public void close()
        Description copied from interface: Node
        Closes this node. A closed node must no longer be used.
        Specified by:
        close in interface AutoCloseable
        Specified by:
        close in interface Node