Package com.exonum.binding.service

Class 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 Description
      NodeFake​(MemoryDb database)
      Creates a new node fake with the given database and an empty public key.
      NodeFake​(MemoryDb database, com.exonum.binding.common.crypto.PublicKey publicKey)
      Creates a new node fake with the given database.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      MemoryDb getDatabase()
      Returns the underlying database.
      com.exonum.binding.common.crypto.PublicKey getPublicKey()
      Returns the service public key of this node.
      com.exonum.binding.common.hash.HashCode submitTransaction​(RawTransaction transaction)
      Returns a zero hash always, ignoring the transaction.
      <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,
                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:
        java.lang.NullPointerException - if the transaction is null
        See Also:
        Blockchain.getTxMessages()

      • 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 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 MemoryDb getDatabase()
        Returns the underlying database.