Fix equality test for userdata. Includes improved test7.lua.

src/test/res/test7-expected.out

@@ -1,6 +1,7 @@
-java.lang.Object@b1b4c3
-SampleClass@72ffb
+java.lang.Object@xxxxxx
+org.luaj.sample.SampleClass@xxxxxx
 Hello
 Hello
+true
 World
-Square root of 9 is	3.0
+Square root of 9 is	3

src/test/res/test7.lua

@@ -1,14 +1,21 @@
+local function fixhash(msg)
+  return string.gsub(msg, "@(%x+)", function(s) return "@"..(string.rep("x", 6)) end)
+end
+
 obj = luajava.newInstance("java.lang.Object")
-print( obj )
+print( fixhash( tostring(obj) ) )
 
-obj = luajava.newInstance("org.luaj.sample.SampleClass")
-print( obj )
-obj.s = "Hello"
-print( obj.s )
-print( obj:getS() )
+sample = luajava.newInstance("org.luaj.sample.SampleClass")
+print( fixhash( tostring(sample) ) )
+sample.s = "Hello"
+print( sample.s )
+print( sample:getS() )
 
-obj:setS( "World" )
-print( obj.s )
+sample:setObj(obj)
+print( obj == sample:getObj() )
+
+sample:setS( "World" )
+print( sample.s )
 
 math = luajava.bindClass("java.lang.Math")
 print("Square root of 9 is", math:sqrt(9.0))