Scala example source code file (MemoryHistoryTest.java)

This example Scala source code file (MemoryHistoryTest.java) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

after, before, memoryhistory, memoryhistorytest, string, test

The MemoryHistoryTest.java Scala example source code

/*
 * Copyright (C) 2010 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 scala.tools.jline.console.history;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static junit.framework.Assert.*;

/**
 * Tests for {@link MemoryHistory}.
 *
 * @author <a href="mailto:mwp1@cornell.edu">Marc Prud'hommeaux</a>
 */
public class MemoryHistoryTest
{
    private MemoryHistory history;

    @Before
    public void setUp() {
        history = new MemoryHistory();
    }

    @After
    public void tearDown() {
        history = null;
    }

    @Test
    public void testAdd() {
        assertEquals(0, history.size());

        history.add("test");

        assertEquals(1, history.size());
        assertEquals("test", history.get(0));
        assertEquals(1, history.index());
    }

    private void assertHistoryContains(final int offset, final String... items) {
        assertEquals(items.length, history.size());
        int i=0;
        for (History.Entry entry : history) {
            assertEquals(offset + i, entry.index());
            assertEquals(items[i++], entry.value());
        }
    }

    @Test
    public void testOffset() {
        history.setMaxSize(5);

        assertEquals(0, history.size());
        assertEquals(0, history.index());

        history.add("a");
        history.add("b");
        history.add("c");
        history.add("d");
        history.add("e");

        assertEquals(5, history.size());
        assertEquals(5, history.index());
        assertHistoryContains(0, "a", "b", "c", "d", "e");

        history.add("f");

        assertEquals(5, history.size());
        assertEquals(6, history.index());

        assertHistoryContains(1, "b", "c", "d", "e", "f");
        assertEquals("f", history.get(5));
    }

    @Test
    public void testReplace() {
        assertEquals(0, history.size());

        history.add("a");
        history.add("b");
        history.replace("c");

        assertHistoryContains(0, "a", "c");
    }
}