LongIdAndVersionTest.java

package com.aconex.scrutineer;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.not;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;


public class LongIdAndVersionTest {

    @Mock
    ObjectOutputStream objectOutputStream;

    @Mock
    ObjectInputStream objectInputStream;

    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void shouldBeEqualWhenIdAndVersionAreTheSame() {
        LongIdAndVersion idAndVersion1 = new LongIdAndVersion(2L,3);
        LongIdAndVersion idAndVersion2 = new LongIdAndVersion(2L,3);
        assertThat(idAndVersion1, is(idAndVersion2));
        assertThat(idAndVersion1.hashCode(), is(idAndVersion2.hashCode()));
    }

    @Test
    public void shouldNotBeEqualWhenIdsDiffer() {
        LongIdAndVersion idAndVersion1 = new LongIdAndVersion(2L,3);
        LongIdAndVersion idAndVersion2 = new LongIdAndVersion(3L,3);
        assertThat(idAndVersion1, is(not(idAndVersion2)));
        assertThat(idAndVersion1.hashCode(), is(not(idAndVersion2.hashCode())));
    }

    @Test
    public void shouldNotBeEqualWhenVersionsDiffer() {
        LongIdAndVersion idAndVersion1 = new LongIdAndVersion(2L,2);
        LongIdAndVersion idAndVersion2 = new LongIdAndVersion(2L,15);
        assertThat(idAndVersion1, is(not(idAndVersion2)));
        assertThat(idAndVersion1.hashCode(), is(not(idAndVersion2.hashCode())));
    }

    @Test
    public void shouldGet0WhenComapringEqualObjects() {
        LongIdAndVersion idAndVersion1 = new LongIdAndVersion(2L,3);
        LongIdAndVersion idAndVersion2 = new LongIdAndVersion(2L,3);
        assertThat(idAndVersion1.compareTo(idAndVersion2), is(0));
    }

    @Test
    public void shouldGetn1WhenComapringLesserIds() {
        LongIdAndVersion idAndVersion1 = new LongIdAndVersion(2L,3);
        LongIdAndVersion idAndVersion2 = new LongIdAndVersion(3L,3);
        assertThat(idAndVersion1.compareTo(idAndVersion2), is(-1));
    }

    @Test
    public void shouldGetn1WhenComapringLesserVersions() {
        LongIdAndVersion idAndVersion1 = new LongIdAndVersion(2L,3);
        LongIdAndVersion idAndVersion2 = new LongIdAndVersion(2L,4);
        assertThat(idAndVersion1.compareTo(idAndVersion2), is(-1));
    }

    @Test
    public void shouldGet1WhenComapringGreaterIds() {
        LongIdAndVersion idAndVersion1 = new LongIdAndVersion(2L,3);
        LongIdAndVersion idAndVersion2 = new LongIdAndVersion(1L,3);
        assertThat(idAndVersion1.compareTo(idAndVersion2), is(1));
    }

    @Test
    public void shouldGet1WhenComapringGreaterVersions() {
        LongIdAndVersion idAndVersion1 = new LongIdAndVersion(2L,3);
        LongIdAndVersion idAndVersion2 = new LongIdAndVersion(2L,2);
        assertThat(idAndVersion1.compareTo(idAndVersion2), is(1));
    }

    @Test(expected = NullPointerException.class)
    public void shouldThrowNPEWhenComparedToNull() {
        LongIdAndVersion idAndVersion = new LongIdAndVersion(2L,3);
        idAndVersion.compareTo(null);
    }

    @Test
    public void shouldPrintTheIdAndVersionInToString() {
        LongIdAndVersion idAndVersion = new LongIdAndVersion(2L,3);
        assertThat(idAndVersion.toString(), is("2:3"));
    }

    @Test
    public void shouldWriteToOutputStream() throws IOException {
        LongIdAndVersion idAndVersion = new LongIdAndVersion(2L, 3);
        idAndVersion.writeToStream(objectOutputStream);
        verify(objectOutputStream).writeLong(idAndVersion.getLongId());
        verify(objectOutputStream).writeLong(idAndVersion.getVersion());
    }

    @Test
    public void shouldReadFromInputStream() throws IOException {
        when(objectInputStream.readLong()).thenReturn(10L);
        when(objectInputStream.readLong()).thenReturn(10L);

        IdAndVersion idAndVersion = LongIdAndVersion.FACTORY.readFromStream(objectInputStream);

        assertThat(idAndVersion.getId(), is("10"));
        assertThat(idAndVersion.getVersion(), is(10L));
    }
}