Add unit test for weak tables.

src/test/java/org/luaj/vm/LuaJTest.java

@@ -172,6 +172,10 @@ public class LuaJTest extends TestCase {
                 runTest( "upvalues3" );
         }
         
+        public void testWeakTable() throws IOException, InterruptedException {
+            runTest( "weaktable" );
+        }
+
 //*/
         private void runTest( String testName ) throws IOException, InterruptedException {
 

src/test/res/weaktable.lua

@@ -0,0 +1,106 @@
+-- concat
+print( '-- weak table tests' )
+
+-- construct new weak table
+function newweak(t) 
+	return setmetatable(t,{__mode="v"})	
+end
+
+-- print the elements of a table in a platform-independent way
+function eles(t,f)
+	f = f or pairs
+	all = {}
+	for k,v in f(t) do
+		table.insert( all, "["..tostring(k).."]="..tostring(v) )
+	end
+	table.sort( all )
+	return "{"..table.concat(all,',').."}"
+end
+
+-- insert, maxn
+print( '-- insert, maxn tests' )
+local t = newweak{ "one", "two", "three", a='aaa', b='bbb', c='ccc' }
+print( eles(t) )
+table.insert(t,'six'); print( eles(t) )
+table.insert(t,1,'seven'); print( eles(t) )
+table.insert(t,4,'eight'); print( eles(t) )
+table.insert(t,7,'nine');  print( eles(t) )
+table.insert(t,10,'ten');  print( eles(t) )
+
+-- remove
+print( '-- remove tests' )
+t = newweak{ "one", "two", "three", "four", "five", "six", "seven", [10]="ten", a='aaa', b='bbb', c='ccc' }
+print( eles(t) )
+print( table.remove(t) ); print( eles(t) )
+print( table.remove(t,1) ); print( eles(t) )
+print( table.remove(t,3) ); print( eles(t) )
+print( table.remove(t,5) ); print( eles(t) )
+print( table.remove(t,10) ); print( eles(t) )
+print( table.remove(t,-1) ); print( eles(t) )
+print( table.remove(t,-1) ) ; print( eles(t) )
+
+-- sort
+print( '-- sort tests' )
+function sorttest(t,f)
+	t = newweak(t)
+	print( table.concat(t,'-') )
+	if f then
+		table.sort(t,f)
+	else	
+		table.sort(t)
+	end
+	print( table.concat(t,'-') )
+end	
+sorttest{ "one", "two", "three" }
+sorttest{  "www", "vvv", "uuu", "ttt", "sss", "zzz", "yyy", "xxx" }
+sorttest( {  "www", "vvv", "uuu", "ttt", "sss", "zzz", "yyy", "xxx" }, function(a,b) return b<a end)
+
+-- getn
+t0 = newweak{}
+t1 = newweak{ 'one', 'two', 'three' }
+t2 = newweak{ a='aa', b='bb', c='cc' }
+t3 = newweak{ 'one', 'two', 'three', a='aa', b='bb', c='cc' }
+print( 'getn(t0)', pcall( table.getn, t0 ) ) 
+print( 'getn(t1)', pcall( table.getn, t1 ) ) 
+print( 'getn(t2)', pcall( table.getn, t2 ) ) 
+print( 'getn(t3)', pcall( table.getn, t3 ) ) 
+
+-- foreach
+function test( f, t, result, name ) 
+	status, value = pcall( f, t, function(...) 
+		print(name,...)
+		return result 
+	end )
+	print( name, 's,v', status, value )
+end
+function testall( f, t, name ) 
+	test( f, t, nil, name..'nil' )
+	test( f, t, false, name..'fls' )
+	test( f, t, 100, name..'100' )
+end
+testall( table.foreach, t0, 'table.foreach(t0)' )
+testall( table.foreach, t1, 'table.foreach(t1)' )
+testall( table.foreach, t2, 'table.foreach(t2)' )
+testall( table.foreach, t3, 'table.foreach(t3)' )
+testall( table.foreachi, t0, 'table.foreachi(t0)' )
+testall( table.foreachi, t1, 'table.foreachi(t1)' )
+testall( table.foreachi, t2, 'table.foreachi(t2)' )
+testall( table.foreachi, t3, 'table.foreachi(t3)' )
+
+-- pairs, ipairs
+function testpairs(f, t, name)
+	print( name, unpack(t) )
+	for a,b in f(t) do
+		print( a, b )
+	end
+end
+testpairs( pairs, t0, 'pairs(t0)' )
+testpairs( pairs, t1, 'pairs(t1)' )
+testpairs( pairs, t2, 'pairs(t2)' )
+testpairs( pairs, t3, 'pairs(t3)' )
+testpairs( ipairs, t0, 'ipairs(t0)' )
+testpairs( ipairs, t1, 'ipairs(t1)' )
+testpairs( ipairs, t2, 'ipairs(t2)' )
+testpairs( ipairs, t3, 'ipairs(t3)' )
+
+