[Pawnzilla-svn] SF.net SVN: pawnzilla: [334] trunk/engine

[<nw...@us...>]

Revision: 334
          http://pawnzilla.svn.sourceforge.net/pawnzilla/?rev=334&view=rev
Author:   nwsmith
Date:     2008-06-15 20:33:20 -0700 (Sun, 15 Jun 2008)

Log Message:
-----------
- adding can_promote? method

Modified Paths:
--------------
    trunk/engine/src/rules_engine.rb
    trunk/engine/test/tc_rules_engine.rb

Modified: trunk/engine/src/rules_engine.rb
===================================================================
--- trunk/engine/src/rules_engine.rb	2008-06-16 03:16:57 UTC (rev 333)
+++ trunk/engine/src/rules_engine.rb	2008-06-16 03:33:20 UTC (rev 334)
@@ -576,6 +576,19 @@
     new_piece = Chess::Piece.new(old_piece.colour, new_piece_name)
     place_piece(coord, new_piece)
   end
+  
+  def can_promote?(colour)
+    y = colour.white? ? 7 : 0
+    
+    0.upto(7) do |x|
+      piece = sq_at(Coord.new(x, y)).piece
+      if (!piece.nil? && piece.pawn? && piece.colour == colour)
+        return true
+      end
+    end
+    
+    false
+  end
   #----------------------------------------------------------------------------
   # End piece helpers
   #----------------------------------------------------------------------------

Modified: trunk/engine/test/tc_rules_engine.rb
===================================================================
--- trunk/engine/test/tc_rules_engine.rb	2008-06-16 03:16:57 UTC (rev 333)
+++ trunk/engine/test/tc_rules_engine.rb	2008-06-16 03:33:20 UTC (rev 334)
@@ -824,6 +824,119 @@
     assert(new_piece.queen?)   
   end
   
+  def test_can_promote_should_return_false_when_nothing_to_promote
+    e = RulesEngine.new
+    place_pieces(e, "
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - - 
+      - - - - - - - - 
+      - - - p - - - -   
+      - - - - - - - -
+    ") 
+    assert(!e.can_promote?(Colour::WHITE))
+    assert(!e.can_promote?(Colour::BLACK))
+  end
+  
+  def test_can_promote_should_return_true_for_promotable_white_pawn
+    e = RulesEngine.new
+    place_pieces(e, "
+      - - - p - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - - 
+      - - - - - - - - 
+      - - - - - - - -   
+      - - - - - - - -
+    ") 
+    assert(e.can_promote?(Colour::WHITE))
+    assert(!e.can_promote?(Colour::BLACK))    
+  end
+  
+  def test_can_promote_should_return_true_for_promotable_black_pawn
+    e = RulesEngine.new
+    place_pieces(e, "
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - - 
+      - - - - - - - - 
+      - - - - - - - -   
+      - - - P - - - -
+    ") 
+    assert(!e.can_promote?(Colour::WHITE))
+    assert(e.can_promote?(Colour::BLACK))        
+  end
+  
+  def test_can_promote_should_return_false_for_non_promotable_white_pawn
+    e = RulesEngine.new
+    place_pieces(e, "
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - - 
+      - - - - - - - - 
+      - - - - - - - -   
+      - - - p - - - -
+    ") 
+    assert(!e.can_promote?(Colour::WHITE))
+    assert(!e.can_promote?(Colour::BLACK))            
+  end
+  
+  def test_can_promote_should_return_false_for_non_promotable_black_pawn
+    e = RulesEngine.new
+    place_pieces(e, "
+      - - - P - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - - 
+      - - - - - - - - 
+      - - - - - - - -   
+      - - - - - - - -
+    ") 
+    assert(!e.can_promote?(Colour::WHITE))
+    assert(!e.can_promote?(Colour::BLACK))            
+  end
+  
+  def test_can_promote_should_return_false_for_non_promotable_white_piece
+    e = RulesEngine.new
+    place_pieces(e, "
+      - - - q - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - - 
+      - - - - - - - - 
+      - - - - - - - -   
+      - - - - - - - -
+    ") 
+    assert(!e.can_promote?(Colour::WHITE))
+    assert(!e.can_promote?(Colour::BLACK))            
+  end
+  
+  def test_can_promote_should_return_false_for_non_promotable_black_piece
+    e = RulesEngine.new
+    place_pieces(e, "
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - -
+      - - - - - - - - 
+      - - - - - - - - 
+      - - - - - - - -   
+      - - - Q - - - -
+    ") 
+    assert(!e.can_promote?(Colour::WHITE))
+    assert(!e.can_promote?(Colour::BLACK))        
+    
+  end
+  
   #----------------------------------------------------------------------------
   # End piece helper tests
   #----------------------------------------------------------------------------  


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