StringIdAndVersionTest.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 StringIdAndVersionTest {

    @Mock
    ObjectOutputStream objectOutputStream;

    @Mock
    ObjectInputStream objectInputStream;

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

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

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

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

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

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

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

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

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

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

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

    @Test
    public void shouldWriteToOutputStream() throws IOException {
        StringIdAndVersion idAndVersion = new StringIdAndVersion("2", 3);
        idAndVersion.writeToStream(objectOutputStream);
        verify(objectOutputStream).writeUTF(idAndVersion.getId());
        verify(objectOutputStream).writeLong(idAndVersion.getVersion());
    }

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

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

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