code: /*
   * Copyright (c) 2019 the Eclipse Milo Authors
   *
   * This program and the accompanying materials are made
   * available under the terms of the Eclipse Public License 2.0
   * which is available at https://www.eclipse.org/legal/epl-2.0/
   *
   * SPDX-License-Identifier: EPL-2.0
   */
  
  package org.eclipse.milo.opcua.stack.core.serialization.binary;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.Unpooled;
  import org.eclipse.milo.opcua.stack.core.serialization.OpcUaBinaryStreamEncoder;
  import org.eclipse.milo.opcua.stack.core.serialization.TestSerializationContext;
  import org.testng.annotations.BeforeTest;
  import org.testng.annotations.Test;
  
  import static org.testng.Assert.assertEquals;
  
  public class OpcUaBinaryStreamEncoderTest {
  
      ByteBuf buffer;
      OpcUaBinaryStreamEncoder writer;
  
      @BeforeTest
      public void initializeTest() {
          buffer = Unpooled.buffer();
          writer = new OpcUaBinaryStreamEncoder(new TestSerializationContext()).setBuffer(buffer);
      }
  
      @Test
      public void testWriteBit() throws Exception {
          {
              writer.writeBit(1);
              writer.writeBit(1);
              writer.writeBit(1);
              writer.writeBit(1);
              writer.writeBit(0);
              writer.writeBit(0);
              writer.writeBit(0);
              writer.writeBit(0);
              assertEquals(buffer.readUnsignedByte(), 0b00001111);
          }
          {
              writer.writeBit(0);
              writer.writeBit(0);
              writer.writeBit(0);
              writer.writeBit(0);
              writer.writeBit(1);
              writer.writeBit(1);
              writer.writeBit(1);
              writer.writeBit(1);
              assertEquals(buffer.readUnsignedByte(), 0b11110000);
          }
          {
              writer.writeBit(0);
              writer.writeBit(1);
              writer.writeBit(0);
              writer.writeBit(1);
              writer.writeBit(0);
              writer.writeBit(1);
              writer.writeBit(0);
              writer.writeBit(1);
              assertEquals(buffer.readUnsignedByte(), 0b10101010);
          }
          {
              writer.writeBit(1);
              writer.writeBit(0);
              writer.writeBit(1);
              writer.writeBit(0);
              writer.writeBit(1);
              writer.writeBit(0);
              writer.writeBit(1);
              writer.writeBit(0);
              assertEquals(buffer.readUnsignedByte(), 0b01010101);
          }
      }
  
  }
  