io.grpc.alts.internal.TsiFrameHandlerTest.java Source code

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Here is the source code for io.grpc.alts.internal.TsiFrameHandlerTest.java

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/*
 * Copyright 2018 The gRPC 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 io.grpc.alts.internal;

import static com.google.common.truth.Truth.assertThat;
import static com.google.common.truth.Truth.assertWithMessage;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPromise;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.util.CharsetUtil;
import java.security.GeneralSecurityException;
import java.util.List;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.DisableOnDebug;
import org.junit.rules.TestRule;
import org.junit.rules.Timeout;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Unit tests for {@link TsiFrameHandler}. */
@RunWith(JUnit4.class)
public class TsiFrameHandlerTest {

    @Rule
    public final TestRule globalTimeout = new DisableOnDebug(Timeout.seconds(5));

    private final TsiFrameHandler tsiFrameHandler = new TsiFrameHandler(new IdentityFrameProtector());
    private final EmbeddedChannel channel = new EmbeddedChannel(tsiFrameHandler);

    @Test
    public void writeAndFlush_handshakeSucceed() throws InterruptedException {
        ByteBuf msg = Unpooled.copiedBuffer("message after handshake finished", CharsetUtil.UTF_8);

        channel.writeAndFlush(msg);
        Object actual = channel.readOutbound();

        assertThat(actual).isEqualTo(msg);
        channel.close().sync();
        channel.checkException();
    }

    @Test
    public void writeAndFlush_shouldBeIgnoredAfterClose() throws InterruptedException {
        channel.close().sync();
        ByteBuf msg = Unpooled.copiedBuffer("message after closed", CharsetUtil.UTF_8);

        channel.writeAndFlush(msg);

        assertThat(channel.outboundMessages()).isEmpty();
        try {
            channel.checkException();
        } catch (Exception e) {
            throw new AssertionError("Any attempt after close should be ignored without out exception", e);
        }
    }

    @Test
    public void close_shouldFlushRemainingMessage() throws InterruptedException {
        ByteBuf msg = Unpooled.copiedBuffer("message after handshake failed", CharsetUtil.UTF_8);
        channel.write(msg);

        assertThat(channel.outboundMessages()).isEmpty();

        channel.close().sync();
        Object actual = channel.readOutbound();

        assertWithMessage("pending write should be flushed on close").that(actual).isEqualTo(msg);
        channel.checkException();
    }

    @Test
    public void flushAfterCloseShouldWork() throws InterruptedException {
        ByteBuf msg = Unpooled.copiedBuffer("message after handshake failed", CharsetUtil.UTF_8);
        channel.write(msg);

        channel.pipeline().addFirst(new ChannelOutboundHandlerAdapter() {
            @Override
            public void close(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
                // We have to call flush while doing a close, since close() tears down the pipeline
                // immediately after.
                channel.flush();
                super.close(ctx, promise);
            }
        });

        assertThat(channel.outboundMessages()).isEmpty();

        channel.close().sync();
        Object actual = channel.readOutbound();

        assertWithMessage("pending write should be flushed on close").that(actual).isEqualTo(msg);
        channel.checkException();
    }

    private static final class IdentityFrameProtector implements TsiFrameProtector {

        @Override
        public void protectFlush(List<ByteBuf> unprotectedBufs, Consumer<ByteBuf> ctxWrite, ByteBufAllocator alloc)
                throws GeneralSecurityException {
            for (ByteBuf unprotectedBuf : unprotectedBufs) {
                ctxWrite.accept(unprotectedBuf);
            }
        }

        @Override
        public void unprotect(ByteBuf in, List<Object> out, ByteBufAllocator alloc)
                throws GeneralSecurityException {
            out.add(in.toString(CharsetUtil.UTF_8));
        }

        @Override
        public void destroy() {
        }
    }
}