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Java example source code file (FunnelsTest.java)

This example Java source code file (FunnelsTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

charset, equalstester, funnel, funnelstest, hashcode, inorder, integer, long, nio, nullpointerexception, object, outputstream, override, primitivesink, unsupportedoperationexception, util

The FunnelsTest.java Java example source code

/*
 * Copyright (C) 2011 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.hash;

import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

import com.google.common.base.Charsets;
import com.google.common.hash.AbstractStreamingHashFunction.AbstractStreamingHasher;
import com.google.common.testing.EqualsTester;
import com.google.common.testing.SerializableTester;

import junit.framework.TestCase;

import org.mockito.InOrder;

import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.util.Arrays;

/**
 * Tests for HashExtractors.
 *
 * @author Dimitris Andreou
 */
public class FunnelsTest extends TestCase {
  public void testForBytes() {
    PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
    Funnels.byteArrayFunnel().funnel(new byte[] { 4, 3, 2, 1 }, primitiveSink);
    verify(primitiveSink).putBytes(new byte[] { 4, 3, 2, 1 });
  }

  public void testForBytes_null() {
    assertNullsThrowException(Funnels.byteArrayFunnel());
  }

  public void testForStrings() {
    PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
    Funnels.unencodedCharsFunnel().funnel("test", primitiveSink);
    verify(primitiveSink).putUnencodedChars("test");
  }

  public void testForStrings_null() {
    assertNullsThrowException(Funnels.unencodedCharsFunnel());
  }

  public void testForStringsCharset() {
    for (Charset charset : Charset.availableCharsets().values()) {
      PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
      Funnels.stringFunnel(charset).funnel("test", primitiveSink);
      verify(primitiveSink).putString("test", charset);
    }
  }

  public void testForStringsCharset_null() {
    for (Charset charset : Charset.availableCharsets().values()) {
      assertNullsThrowException(Funnels.stringFunnel(charset));
    }
  }

  public void testForInts() {
    Integer value = 1234;
    PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
    Funnels.integerFunnel().funnel(value, primitiveSink);
    verify(primitiveSink).putInt(1234);
  }

  public void testForInts_null() {
    assertNullsThrowException(Funnels.integerFunnel());
  }

  public void testForLongs() {
    Long value = 1234L;
    PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
    Funnels.longFunnel().funnel(value, primitiveSink);
    verify(primitiveSink).putLong(1234);
  }

  public void testForLongs_null() {
    assertNullsThrowException(Funnels.longFunnel());
  }

  public void testSequential() {
    @SuppressWarnings("unchecked")
    Funnel<Object> elementFunnel = mock(Funnel.class);
    PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
    Funnel<Iterable sequential = Funnels.sequentialFunnel(elementFunnel);
    sequential.funnel(Arrays.asList("foo", "bar", "baz", "quux"), primitiveSink);
    InOrder inOrder = inOrder(elementFunnel);
    inOrder.verify(elementFunnel).funnel("foo", primitiveSink);
    inOrder.verify(elementFunnel).funnel("bar", primitiveSink);
    inOrder.verify(elementFunnel).funnel("baz", primitiveSink);
    inOrder.verify(elementFunnel).funnel("quux", primitiveSink);
  }

  private static void assertNullsThrowException(Funnel<?> funnel) {
    PrimitiveSink primitiveSink = new AbstractStreamingHasher(4, 4) {
      @Override HashCode makeHash() { throw new UnsupportedOperationException(); }

      @Override protected void process(ByteBuffer bb) {
        while (bb.hasRemaining()) {
          bb.get();
        }
      }
    };
    try {
      funnel.funnel(null, primitiveSink);
      fail();
    } catch (NullPointerException ok) {}
  }

  public void testAsOutputStream() throws Exception {
    PrimitiveSink sink = mock(PrimitiveSink.class);
    OutputStream out = Funnels.asOutputStream(sink);
    byte[] bytes = { 1, 2, 3, 4 };
    out.write(255);
    out.write(bytes);
    out.write(bytes, 1, 2);
    verify(sink).putByte((byte) 255);
    verify(sink).putBytes(bytes);
    verify(sink).putBytes(bytes, 1, 2);
  }

  public void testSerialization() {
    assertSame(
        Funnels.byteArrayFunnel(),
        SerializableTester.reserialize(Funnels.byteArrayFunnel()));
    assertSame(
        Funnels.integerFunnel(),
        SerializableTester.reserialize(Funnels.integerFunnel()));
    assertSame(
        Funnels.longFunnel(),
        SerializableTester.reserialize(Funnels.longFunnel()));
    assertSame(
        Funnels.unencodedCharsFunnel(),
        SerializableTester.reserialize(Funnels.unencodedCharsFunnel()));
    assertEquals(
        Funnels.sequentialFunnel(Funnels.integerFunnel()),
        SerializableTester.reserialize(Funnels.sequentialFunnel(Funnels.integerFunnel())));
    assertEquals(
        Funnels.stringFunnel(Charsets.US_ASCII),
        SerializableTester.reserialize(Funnels.stringFunnel(Charsets.US_ASCII)));
  }

  public void testEquals() {
     new EqualsTester()
       .addEqualityGroup(Funnels.byteArrayFunnel())
       .addEqualityGroup(Funnels.integerFunnel())
       .addEqualityGroup(Funnels.longFunnel())
       .addEqualityGroup(Funnels.unencodedCharsFunnel())
       .addEqualityGroup(Funnels.stringFunnel(Charsets.UTF_8))
       .addEqualityGroup(Funnels.stringFunnel(Charsets.US_ASCII))
       .addEqualityGroup(Funnels.sequentialFunnel(Funnels.integerFunnel()),
           SerializableTester.reserialize(Funnels.sequentialFunnel(
               Funnels.integerFunnel())))
       .addEqualityGroup(Funnels.sequentialFunnel(Funnels.longFunnel()))
       .testEquals();
  }
}

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