TestBufferedHttpEntity.java

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 * to you under the Apache License, Version 2.0 (the
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 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.hc.core5.http.io.entity;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.nio.charset.StandardCharsets;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

/**
 * Unit tests for {@link BufferedHttpEntity}.
 *
 */
class TestBufferedHttpEntity {

    @Test
    void testBufferingEntity() throws Exception {
        final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
        final BufferedHttpEntity entity = new BufferedHttpEntity(
                new InputStreamEntity(new ByteArrayInputStream(bytes), -1, null));
        Assertions.assertEquals(bytes.length, entity.getContentLength());
        Assertions.assertTrue(entity.isRepeatable());
        Assertions.assertFalse(entity.isChunked());
        Assertions.assertFalse(entity.isStreaming());

        // test if we can obtain contain multiple times
        Assertions.assertNotNull(entity.getContent ());
        Assertions.assertNotNull(entity.getContent ());
    }

    @Test
    void testWrappingEntity() throws Exception {
        final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
        final ByteArrayEntity httpentity = new ByteArrayEntity(bytes, null, true);
        try (final BufferedHttpEntity bufentity = new BufferedHttpEntity(httpentity)) {
            Assertions.assertEquals(bytes.length, bufentity.getContentLength());
            Assertions.assertTrue(bufentity.isRepeatable());
            Assertions.assertTrue(bufentity.isChunked());
            Assertions.assertFalse(bufentity.isStreaming());

            // test if we can obtain contain multiple times
            Assertions.assertNotNull(bufentity.getContent());
            Assertions.assertNotNull(bufentity.getContent());
        }
    }

    @Test
    void testIllegalConstructor() {
        Assertions.assertThrows(NullPointerException.class, () -> new BufferedHttpEntity(null));
    }

    @Test
    void testWriteToBuffered() throws Exception {
        final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
        final InputStreamEntity httpentity = new InputStreamEntity(new ByteArrayInputStream(bytes), -1, null);
        try (final BufferedHttpEntity bufentity = new BufferedHttpEntity(httpentity)) {

            ByteArrayOutputStream out = new ByteArrayOutputStream();
            bufentity.writeTo(out);
            byte[] bytes2 = out.toByteArray();
            Assertions.assertNotNull(bytes2);
            Assertions.assertEquals(bytes.length, bytes2.length);
            for (int i = 0; i < bytes.length; i++) {
                Assertions.assertEquals(bytes[i], bytes2[i]);
            }

            out = new ByteArrayOutputStream();
            bufentity.writeTo(out);
            bytes2 = out.toByteArray();
            Assertions.assertNotNull(bytes2);
            Assertions.assertEquals(bytes.length, bytes2.length);
            for (int i = 0; i < bytes.length; i++) {
                Assertions.assertEquals(bytes[i], bytes2[i]);
            }

            Assertions.assertThrows(NullPointerException.class, () -> bufentity.writeTo(null));
        }
    }

    @Test
    void testWriteToWrapped() throws Exception {
        final byte[] bytes = "Message content".getBytes(StandardCharsets.US_ASCII);
        final ByteArrayEntity httpentity = new ByteArrayEntity(bytes, null);
        try (final BufferedHttpEntity bufentity = new BufferedHttpEntity(httpentity)) {

            ByteArrayOutputStream out = new ByteArrayOutputStream();
            bufentity.writeTo(out);
            byte[] bytes2 = out.toByteArray();
            Assertions.assertNotNull(bytes2);
            Assertions.assertEquals(bytes.length, bytes2.length);
            for (int i = 0; i < bytes.length; i++) {
                Assertions.assertEquals(bytes[i], bytes2[i]);
            }

            out = new ByteArrayOutputStream();
            bufentity.writeTo(out);
            bytes2 = out.toByteArray();
            Assertions.assertNotNull(bytes2);
            Assertions.assertEquals(bytes.length, bytes2.length);
            for (int i = 0; i < bytes.length; i++) {
                Assertions.assertEquals(bytes[i], bytes2[i]);
            }

            Assertions.assertThrows(NullPointerException.class, () -> bufentity.writeTo(null));
        }
    }

}