OkHttpWritableBufferAllocatorTest.java

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package io.grpc.okhttp;

import static org.junit.Assert.assertEquals;

import io.grpc.internal.WritableBuffer;
import io.grpc.internal.WritableBufferAllocator;
import io.grpc.internal.WritableBufferAllocatorTestBase;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Tests for {@link OkHttpWritableBufferAllocator}.
 */
@RunWith(JUnit4.class)
public class OkHttpWritableBufferAllocatorTest extends WritableBufferAllocatorTestBase {

  private final OkHttpWritableBufferAllocator allocator = new OkHttpWritableBufferAllocator();

  @Override
  protected WritableBufferAllocator allocator() {
    return allocator;
  }

  @Test
  public void testCapacity() {
    WritableBuffer buffer = allocator().allocate(4096);
    assertEquals(0, buffer.readableBytes());
    assertEquals(4096, buffer.writableBytes());
  }

  @Test
  public void testInitialCapacityHasMaximum() {
    WritableBuffer buffer = allocator().allocate(1024 * 1025);
    assertEquals(0, buffer.readableBytes());
    assertEquals(1024 * 1024, buffer.writableBytes());
  }

  @Test
  public void testIsExactBelowMaxCapacity() {
    WritableBuffer buffer = allocator().allocate(4097);
    assertEquals(0, buffer.readableBytes());
    assertEquals(4097, buffer.writableBytes());
  }
}