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/*
* Copyright (C) 2008 Steve Ratcliffe
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*
* Author: Steve Ratcliffe
* Create date: 29-Nov-2008
*/
package uk.me.parabola.mkgmap.general;
import java.util.Arrays;
import java.util.List;
import uk.me.parabola.imgfmt.app.Area;
import uk.me.parabola.imgfmt.app.Coord;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
public class LineClipperTest
{
/**
* This is the example as given on the referenced web page.
* We now use integers instead of floats so the 101.425 from the
* example is just 101 here.
*/
@Test
public void testExampleClip
() {
Area a =
new Area(60,
70,
150,
230);
Coord
[] co =
{
new Coord
(20,
30),
new Coord
(160,
280),
};
List<List<Coord
>> listList = LineClipper.
clip(a,
Arrays.
asList(co
));
assertTrue
("list should be empty",
!listList.
isEmpty());
Coord
[] result =
{
new Coord
(60,
101),
new Coord
(132,
230)
};
assertArrayEquals
("example result", result, listList.
get(0).
toArray());
}
/**
* Test an original line that enters the area, leaves it and then goes back
* into the area. This should give two lines in the result set.
*/
@Test
public void testListClip
() {
// Add your code here
Area a =
new Area(100,
100,
200,
200);
List<Coord
> l =
Arrays.
asList(new Coord
(20,
30),
new Coord
(40,
60),
new Coord
(102,
110),
new Coord
(150,
150),
new Coord
(210,
220),
new Coord
(190,
135)
);
List<List<Coord
>> list = LineClipper.
clip(a, l
);
// There should be exactly two lines
assertEquals
("should be two lines",
2, list.
size());
// No empty lists
for (List<Coord
> lco : list
)
assertTrue
("empty list",
!lco.
isEmpty());
// Check values
Coord
[] firstExpectedLine =
{
new Coord
(100,
108),
new Coord
(102,
110),
new Coord
(150,
150),
new Coord
(193,
200)
};
assertArrayEquals
(firstExpectedLine, list.
get(0).
toArray());
Coord
[] secondExpectedLine =
{
new Coord
(200,
178),
new Coord
(190,
135)
};
assertArrayEquals
(secondExpectedLine, list.
get(1).
toArray());
}
/**
* If all the lines are inside, then it should just return null to indicate that.
*/
@Test
public void testAllInside
() {
Area a =
new Area(100,
100,
200,
200);
List<Coord
> l =
Arrays.
asList(
new Coord
(102,
110),
new Coord
(150,
150),
new Coord
(190,
195)
);
List<List<Coord
>> list = LineClipper.
clip(a, l
);
assertNull
("all lines inside", list
);
}
}