ScratchBufferTest.java

/*
 * Copyright 2015 the original author or 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 org.glowroot.common.model;

import java.nio.ByteBuffer;

import org.junit.Test;

import org.glowroot.common.model.LazyHistogram.ScratchBuffer;

import static org.assertj.core.api.Assertions.assertThat;

public class ScratchBufferTest {

    @Test
    public void testCapacityExpands() {
        // given
        ScratchBuffer scratchBuffer = new ScratchBuffer();
        scratchBuffer.getBuffer(1000);
        // when
        ByteBuffer buffer = scratchBuffer.getBuffer(2000);
        // then
        assertThat(buffer.capacity()).isEqualTo(2000);
    }
}