package org.wamblee.xmlrouter.impl;

import static junit.framework.Assert.*;
import static org.mockito.Matchers.*;
import static org.mockito.Mockito.*;

import javax.xml.transform.dom.DOMSource;

import org.junit.Before;
import org.junit.Test;
import org.wamblee.xmlrouter.common.Id;
import org.wamblee.xmlrouter.config.Transformation;

public class RobustTransformationTest {
    private Transformation transformation;
    private Transformation robust;
    private DOMSource source;
    private DOMSource resSource;

    @Before
    public void setUp() {
        transformation = mock(Transformation.class);
        robust = new RobustTransformation(new Id<Transformation>(100),
            transformation);
        source = mock(DOMSource.class);
        resSource = mock(DOMSource.class);
    }

    @Test
    public void testNormalFlow() {
        when(transformation.getFromType()).thenReturn("from");
        when(transformation.getToType()).thenReturn("to");

        when(transformation.transform(same(source))).thenReturn(resSource);

        assertEquals("from", robust.getFromType());
        assertEquals("to", robust.getToType());

        assertSame(resSource, robust.transform(source));
    }

    @Test
    public void testFromReturnsNull() {
        when(transformation.getFromType()).thenReturn(null);
        assertEquals(Constants.UNKNOWN_DOCUMENT_TYPE.toString(),
            robust.getFromType());
    }

    @Test
    public void testToReturnsNull() {
        when(transformation.getToType()).thenReturn(null);
        assertEquals(Constants.UNKNOWN_DOCUMENT_TYPE.toString(),
            robust.getToType());
    }

    @Test
    public void testFromThrowsException() {
        doThrow(new RuntimeException("x")).when(transformation).getFromType();
        assertEquals(Constants.UNKNOWN_DOCUMENT_TYPE.toString(),
            robust.getFromType());
    }

    @Test
    public void testToThrowsException() {
        doThrow(new RuntimeException("x")).when(transformation).getFromType();
        assertEquals(Constants.UNKNOWN_DOCUMENT_TYPE.toString(),
            robust.getFromType());
    }

    @Test
    public void testTransformReturnsNull() {
        when(transformation.transform(any(DOMSource.class))).thenReturn(null);
        assertEquals(null, robust.transform(source));
    }

    @Test
    public void testTransformationThrowsException() {
        doThrow(new RuntimeException("x")).when(transformation).transform(
            any(DOMSource.class));
        assertEquals(null, robust.transform(source));
    }
}