AbstractByteBufAllocatorTest Class — netty Architecture

Source Code

buffer/src/test/java/io/netty/buffer/AbstractByteBufAllocatorTest.java lines 35–226

public abstract class AbstractByteBufAllocatorTest<T extends AbstractByteBufAllocator> extends ByteBufAllocatorTest {

    @Override
    protected abstract T newAllocator(boolean preferDirect);

    protected abstract T newUnpooledAllocator();

    @Override
    protected boolean isDirectExpected(boolean preferDirect) {
        return preferDirect && PlatformDependent.canReliabilyFreeDirectBuffers();
    }

    @Override
    protected final int defaultMaxCapacity() {
        return AbstractByteBufAllocator.DEFAULT_MAX_CAPACITY;
    }

    @Override
    protected final int defaultMaxComponents() {
        return AbstractByteBufAllocator.DEFAULT_MAX_COMPONENTS;
    }

    @Test
    public void testCalculateNewCapacity() {
        testCalculateNewCapacity(true);
        testCalculateNewCapacity(false);
    }

    private void testCalculateNewCapacity(boolean preferDirect) {
        T allocator = newAllocator(preferDirect);
        assertEquals(8, allocator.calculateNewCapacity(1, 8));
        assertEquals(7, allocator.calculateNewCapacity(1, 7));
        assertEquals(64, allocator.calculateNewCapacity(1, 129));
        assertEquals(AbstractByteBufAllocator.CALCULATE_THRESHOLD,
                allocator.calculateNewCapacity(AbstractByteBufAllocator.CALCULATE_THRESHOLD,
                        AbstractByteBufAllocator.CALCULATE_THRESHOLD + 1));
        assertEquals(AbstractByteBufAllocator.CALCULATE_THRESHOLD * 2,
                allocator.calculateNewCapacity(AbstractByteBufAllocator.CALCULATE_THRESHOLD + 1,
                        AbstractByteBufAllocator.CALCULATE_THRESHOLD * 4));
        try {
            allocator.calculateNewCapacity(8, 7);
            fail();
        } catch (IllegalArgumentException e) {
            // expected
        }

        try {
            allocator.calculateNewCapacity(-1, 8);
            fail();
        } catch (IllegalArgumentException e) {
            // expected
        }
    }

    @Test
    public void testUnsafeHeapBufferAndUnsafeDirectBuffer() {
        T allocator = newUnpooledAllocator();
        ByteBuf directBuffer = allocator.directBuffer();
        assertInstanceOf(directBuffer,
                PlatformDependent.hasUnsafe() ? UnpooledUnsafeDirectByteBuf.class : UnpooledDirectByteBuf.class);
        directBuffer.release();

        ByteBuf heapBuffer = allocator.heapBuffer();
        assertInstanceOf(heapBuffer,
                PlatformDependent.hasUnsafe() ? UnpooledUnsafeHeapByteBuf.class : UnpooledHeapByteBuf.class);
        heapBuffer.release();
    }

    protected static void assertInstanceOf(ByteBuf buffer, Class<? extends ByteBuf> clazz) {
        // Unwrap if needed
        if (buffer instanceof SimpleLeakAwareByteBuf) {
            buffer = buffer.unwrap();
        }
        assertThat(buffer).isInstanceOf(clazz);
    }

    protected static void assertSameBuffer(ByteBuf expected, ByteBuf buffer) {
        // Unwrap if needed
        assertSame(expected, buffer instanceof SimpleLeakAwareByteBuf ? buffer.unwrap() : buffer);
    }