TestAbstractCharAsyncEntityConsumer.java

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 * to you under the Apache License, Version 2.0 (the
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package org.apache.hc.core5.http.nio.entity;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.StandardCharsets;

import org.apache.hc.core5.concurrent.CountingFutureCallback;
import org.apache.hc.core5.http.ContentType;
import org.apache.hc.core5.http.HttpException;
import org.apache.hc.core5.http.impl.BasicEntityDetails;
import org.apache.hc.core5.http.nio.AsyncEntityConsumer;
import org.apache.hc.core5.util.ByteArrayBuffer;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

class TestAbstractCharAsyncEntityConsumer {

    static private class StringBuilderAsyncEntityConsumer extends AbstractCharAsyncEntityConsumer<String> {

        private final StringBuilder buffer;

        public StringBuilderAsyncEntityConsumer() {
            super();
            this.buffer = new StringBuilder(1024);
        }

        @Override
        protected void streamStart(final ContentType contentType) throws HttpException, IOException {
        }

        @Override
        protected int capacityIncrement() {
            return Integer.MAX_VALUE;
        }

        @Override
        protected void data(final CharBuffer src, final boolean endOfStream) throws IOException {
            buffer.append(src);
        }

        @Override
        protected String generateContent() throws IOException {
            return buffer.toString();
        }

        @Override
        public void releaseResources() {
            buffer.setLength(0);
        }

    }

    @Test
    void testConsumeData() throws Exception {
        final AsyncEntityConsumer<String> consumer = new StringBuilderAsyncEntityConsumer();
        final CountingFutureCallback<String> countingCallback = new CountingFutureCallback<>();
        consumer.streamStart(new BasicEntityDetails(-1, ContentType.TEXT_PLAIN), countingCallback);

        consumer.consume(ByteBuffer.wrap(new byte[]{'1', '2', '3'}));
        consumer.consume(ByteBuffer.wrap(new byte[]{'4', '5'}));
        consumer.consume(ByteBuffer.wrap(new byte[]{}));

        Assertions.assertNull(consumer.getContent());
        consumer.streamEnd(null);

        Assertions.assertEquals("12345", consumer.getContent());
        Assertions.assertEquals(1L, countingCallback.getCount());
    }

    @Test
    void testConsumeIncompleteData() throws Exception {

        final AsyncEntityConsumer<String> consumer = new StringBuilderAsyncEntityConsumer();

        final CountingFutureCallback<String> countingCallback = new CountingFutureCallback<>();
        consumer.streamStart(new BasicEntityDetails(-1, ContentType.TEXT_PLAIN.withCharset(StandardCharsets.UTF_8)), countingCallback);

        final byte[] stuff = "stuff".getBytes(StandardCharsets.UTF_8);
        final byte[] splitCharacter = "��".getBytes(StandardCharsets.UTF_8);

        final ByteArrayBuffer b1 = new ByteArrayBuffer(1024);
        b1.append(stuff, 0, stuff.length);
        b1.append(splitCharacter, 0, 1);
        consumer.consume(ByteBuffer.wrap(b1.toByteArray()));

        final ByteArrayBuffer b2 = new ByteArrayBuffer(1024);
        b2.append(splitCharacter, 1, 1);
        b2.append(stuff, 0, stuff.length);
        b2.append(splitCharacter, 0, 1);
        consumer.consume(ByteBuffer.wrap(b2.toByteArray()));

        final ByteArrayBuffer b3 = new ByteArrayBuffer(1024);
        b3.append(splitCharacter, 1, 1);
        b3.append(stuff, 0, stuff.length);
        consumer.consume(ByteBuffer.wrap(b3.toByteArray()));

        consumer.streamEnd(null);

        Assertions.assertEquals("stuff��stuff��stuff", consumer.getContent());
        Assertions.assertEquals(1L, countingCallback.getCount());
    }

}