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///////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2001, Eric D. Friedman All Rights Reserved.
// Copyright (c) 2009, Rob Eden All Rights Reserved.
// Copyright (c) 2009, Jeff Randall All Rights Reserved.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
///////////////////////////////////////////////////////////////////////////////
package gnu.trove.stack.array;
import gnu.trove.list.array.TIntArrayList;
import gnu.trove.stack.TIntStack;
import junit.framework.TestCase;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
/**
*
*/
public class TStackTest extends TestCase {
public TStackTest() {
super();
}
public TStackTest( String string ) {
super( string );
}
public void testConstructors() {
TIntStack stack = new TIntArrayStack();
assertEquals( 0, stack.size() );
stack.push( 10 );
stack.push( 20 );
assertEquals( 2, stack.size() );
TIntStack other = new TIntArrayStack( 20 );
other.push( 10 );
other.push( 20 );
assertEquals( 2, other.size() );
assertTrue( "stacks should be equal: " + stack + ", " + other,
stack.equals( other ) );
TIntStack copy = new TIntArrayStack( stack );
assertTrue( "stacks should be equal: " + stack + ", " + copy,
stack.equals( copy ) );
}
public void testBasic() {
TIntStack stack = new TIntArrayStack();
assertEquals( 0, stack.size() );
stack.push( 10 );
assertEquals( 1, stack.size() );
assertEquals( 10, stack.peek() );
assertEquals( 1, stack.size() );
assertEquals( 10, stack.peek() );
assertEquals( 1, stack.size() );
assertEquals( 10, stack.pop() );
assertEquals( 0, stack.size() );
stack.push( 10 );
stack.push( 20 );
stack.push( 30 );
assertEquals( 3, stack.size() );
assertEquals( 30, stack.pop() );
assertEquals( 20, stack.pop() );
assertEquals( 10, stack.pop() );
}
public void testArrays() {
int no_entry_value = Integer.MIN_VALUE;
TIntStack stack = new TIntArrayStack(10, no_entry_value);
assertEquals( no_entry_value, stack.getNoEntryValue() );
int[] array;
array = stack.toArray();
assertNotNull( array );
assertEquals( 0, array.length );
stack.push( 10 );
stack.push( 20 );
stack.push( 30 );
stack.push( 40 );
array = stack.toArray();
assertNotNull( array );
assertEquals( 4, array.length );
// NOTE: Top element in stack should be first element in array
assertEquals( 40, array[0] );
assertEquals( 30, array[1] );
assertEquals( 20, array[2] );
assertEquals( 10, array[3] );
assertEquals( 4, stack.size() );
int[] array_correct_size = new int[4];
stack.toArray( array_correct_size );
assertEquals( 40, array_correct_size[0] );
assertEquals( 30, array_correct_size[1] );
assertEquals( 20, array_correct_size[2] );
assertEquals( 10, array_correct_size[3] );
int[] array_too_long = new int[6];
stack.toArray( array_too_long );
assertEquals( 40, array_too_long[0] );
assertEquals( 30, array_too_long[1] );
assertEquals( 20, array_too_long[2] );
assertEquals( 10, array_too_long[3] );
assertEquals( stack.getNoEntryValue(), array_too_long[4] );
int[] array_too_short = new int[2];
stack.toArray( array_too_short );
assertEquals( 40, array_too_short[0] );
assertEquals( 30, array_too_short[1] );
}
public void testClear() {
TIntStack stack = new TIntArrayStack();
assertEquals( 0, stack.size() );
stack.push( 10 );
assertEquals( 1, stack.size() );
assertEquals( 10, stack.pop() );
assertEquals( 0, stack.size() );
stack.push( 10 );
stack.push( 20 );
stack.push( 30 );
assertEquals( 3, stack.size() );
stack.clear();
assertEquals( 0, stack.size() );
}
public void testEquals() {
TIntStack stack = new TIntArrayStack();
assertEquals( 0, stack.size() );
stack.push( 10 );
stack.push( 20 );
assertEquals( 2, stack.size() );
TIntStack other = new TIntArrayStack( 20 );
other.push( 10 );
other.push( 20 );
assertEquals( 2, other.size() );
assertTrue( "stacks should equal itself: " + stack,
stack.equals( stack ) );
assertTrue( "stacks should be equal: " + stack + ", " + other,
stack.equals( other ) );
TIntArrayList list = new TIntArrayList( stack.toArray() );
assertFalse( "stack should not equal list: " + stack + ", " + list,
stack.equals( list ) );
}
public void testHashCode() {
TIntStack stack = new TIntArrayStack();
assertEquals( 0, stack.size() );
stack.push( 10 );
stack.push( 20 );
assertEquals( 2, stack.size() );
TIntStack other = new TIntArrayStack( 20 );
other.push( 10 );
other.push( 20 );
assertEquals( 2, other.size() );
assertTrue( "stack hashcode should equal itself: " + stack,
stack.hashCode() == stack.hashCode() );
assertTrue( "stacks should be equal: " + stack + ", " + other,
stack.hashCode() == other.hashCode() );
other.push( 30 );
assertFalse( "stack should not equal list: " + stack + ", " + other,
stack.hashCode() == other.hashCode() );
}
public void testSerialize() throws Exception {
TIntStack stack = new TIntArrayStack();
stack.push( 10 );
stack.push( 20 );
stack.push( 30 );
stack.push( 40 );
stack.push( 50 );
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream( baos );
oos.writeObject( stack );
ByteArrayInputStream bais = new ByteArrayInputStream( baos.toByteArray() );
ObjectInputStream ois = new ObjectInputStream( bais );
TIntStack serialized = (TIntStack) ois.readObject();
assertEquals( stack, serialized );
}
}
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