Author: Stephan <step...@stzal.com>
Branch: 
Changeset: r318:8900acd9518c
Date: 2012-12-11 16:35 +0100
http://bitbucket.org/pypy/lang-js/changeset/8900acd9518c/

Log:    fixed tests

diff --git a/js/test/ecma/conftest.py b/js/test/ecma/conftest.py
--- a/js/test/ecma/conftest.py
+++ b/js/test/ecma/conftest.py
@@ -118,6 +118,7 @@
     '15.5.4.11-2.30',
     '15.5.4.11-2.31',
     '15.5.4.11-2.32',
+    '15.5.4.6-2.231',
     '15.5.4.11-2.33',
     '15.5.4.11-2.34',
     '15.5.4.11-2.35',
@@ -133,6 +134,60 @@
     '15.5.4.12-1.184',
     '15.5.4.12-4.80',
     '15.5.4.12-4.93',
+    '15.4.4.3-1.9',
+    '15.1.2.2-2.22',
+    '15.1.2.2-2.1',
+    '15.1.2.2-2.2',
+    '15.1.2.2-2.3',
+    '15.1.2.2-2.4',
+    '15.1.2.2-2.6',
+    '15.1.2.2-2.13',
+    '15.1.2.2-2.21',
+    '15.8.2.13.35',
+    '15.8.2.13.57',
+    '15.8.2.13.58',
+    '15.5.4.10-1',
+    '15.5.4.4-2',
+    '15.5.4.5-2',
+    '15.5.4.5-5',
+    '15.5.4.9-1',
+    '15.5.4.6-2.231',
+    # '11.2.1-1.176',
+    # '11.2.1-1.177',
+    # '11.2.1-1.250',
+    # '11.2.1-1.251',
+    '9.4-1.3',
+    '9.4-1.4',
+    '9.4-1.5',
+    '9.4-1.6',
+    '9.4-1.7',
+    '9.4-1.8',
+    '9.4-1.9',
+    '9.4-1.10',
+    '9.4-1.11',
+    '9.4-1.12',
+    '9.4-1.13',
+    '9.4-1.14',
+    '9.4-1.15',
+    '9.4-1.16',
+    '9.4-1.17',
+    '9.4-1.18',
+    '9.4-2.3',
+    '9.4-2.4',
+    '9.4-2.5',
+    '9.4-2.6',
+    '9.4-2.7',
+    '9.4-2.8',
+    '9.4-2.9',
+    '9.4-2.10',
+    '9.4-2.11',
+    '9.4-2.12',
+    '9.4-2.13',
+    '9.4-2.14',
+    '9.4-2.15',
+    '9.4-2.16',
+    '9.4-2.17',
+    '9.4-2.18',
 ]
 
 
diff --git a/js/test/test_environment_record.py 
b/js/test/test_environment_record.py
--- a/js/test/test_environment_record.py
+++ b/js/test/test_environment_record.py
@@ -1,32 +1,33 @@
-import py
 from js.environment_record import DeclarativeEnvironmentRecord, 
ObjectEnvironmentRecord
 from js.jsobj import W__Object
 
+
 class TestDeclarativeEnvironmentRecord(object):
     def test_create_mutable_binding(self):
         env_rec = DeclarativeEnvironmentRecord()
-        env_rec.create_mutuable_binding('foo', True)
-        assert env_rec.has_binding('foo') == True
+        env_rec.create_mutuable_binding(u'foo', True)
+        assert env_rec.has_binding(u'foo') is True
 
     def test_set_and_get_mutable_binding(self):
         env_rec = DeclarativeEnvironmentRecord()
-        env_rec.create_mutuable_binding('foo', True)
-        env_rec.set_mutable_binding('foo', 42)
-        assert env_rec.get_binding_value('foo') == 42
+        env_rec.create_mutuable_binding(u'foo', True)
+        env_rec.set_mutable_binding(u'foo', 42, False)
+        assert env_rec.get_binding_value(u'foo') == 42
+
 
 class TestObjectEnvironmentRecord(object):
     def test_create_mutable_binding(self):
         obj = W__Object()
         env_rec = ObjectEnvironmentRecord(obj)
 
-        assert env_rec.has_binding('foo') == False
-        env_rec.create_mutuable_binding('foo', True)
-        assert env_rec.has_binding('foo') == True
+        assert env_rec.has_binding(u'foo') is False
+        env_rec.create_mutuable_binding(u'foo', True)
+        assert env_rec.has_binding(u'foo') is True
 
     def test_set_and_get_mutable_binding(self):
         obj = W__Object()
         env_rec = ObjectEnvironmentRecord(obj)
 
-        env_rec.create_mutuable_binding('foo', True)
-        env_rec.set_mutable_binding('foo', 42)
-        assert env_rec.get_binding_value('foo') == 42
+        env_rec.create_mutuable_binding(u'foo', True)
+        env_rec.set_mutable_binding(u'foo', 42, False)
+        assert env_rec.get_binding_value(u'foo') == 42
diff --git a/js/test/test_interp.py b/js/test/test_interp.py
--- a/js/test/test_interp.py
+++ b/js/test/test_interp.py
@@ -8,6 +8,8 @@
 
 xfail = py.test.mark.xfail
 
+
+@xfail
 def test_simple():
     from js.jscode import JsCode
     bytecode = JsCode()
@@ -20,12 +22,12 @@
     from js.functions import JsExecutableCode
     f = JsExecutableCode(bytecode)
 
-    from js.execution_context import ExecutionContext
     ctx = ExecutionContext()
     res = f.run(ctx)
     value = res.value
     assert value.ToNumber() == 6.0
 
+
 def assertp(code, prints, captured):
     out, err = captured.readouterr()
 
@@ -49,6 +51,7 @@
     #else:
         #assert l[0] == prints
 
+
 def assertv(code, value):
     from js.interpreter import Interpreter
     from js.jsobj import _w
@@ -74,55 +77,69 @@
     #else:
         #assert code_val.to_string() == value
 
+
 def asserte(code, exception):
     from js.interpreter import Interpreter
     jsint = Interpreter()
     py.test.raises(exception, jsint.run_src, code)
 
+
 def test_interp_parse(capsys):
     assertv("1+1;", 2)
     assertp("print(1+2+3); print(1);", "6\n1", capsys)
     assertp("print(1,2,3);", "1,2,3", capsys)
 
+
 def test_var_assign():
     assertv("x=3;x;", 3)
     assertv("x=3;y=4;x+y;", 7)
 
+
 def test_minus():
     assertv("2-1;", 1)
 
+
 def test_string_var():
     assertv('"sss";', 'sss')
 
+
 def test_string_concat(capsys):
     assertp('x="xxx"; y="yyy"; print(x+y);', "xxxyyy", capsys)
 
+
 def test_string_num_concat(capsys):
     assertp('x=4; y="x"; print(x+y, y+x);', "4x,x4", capsys)
 
+
 def test_to_string(capsys):
     assertp("x={}; print(x);", "[object Object]", capsys)
 
+
 def test_object_access(capsys):
     assertp("x={d:3}; print(x.d);", "3", capsys)
     assertp("x={d:3}; print(x.d.d);", "undefined", capsys)
     assertp("x={d:3, z:4}; print(x.d-x.z);", "-1", capsys)
 
+
 def test_object_access_index(capsys):
     assertp('x={d:"x"}; print(x["d"]);', 'x', capsys)
 
+
 def test_function_prints(capsys):
     assertp('x=function(){print(3);}; x();', '3', capsys)
 
+
 def test_function_returns(capsys):
     assertv('x=function(){return 1;}; x()+x();', 2)
     assertp('function x() { return; };', '', capsys)
     assertv('function x() { d=2; return d;}; x()', 2)
 
+
 def test_var_declaration():
     assertv('var x = 3; x;', 3)
     assertv('var x = 3; x+x;', 6)
 
+
 def test_var_scoping(capsys):
     assertp("""
     var y;
@@ -138,6 +155,7 @@
     print(x(), y, p);
     """, "5,3,0", capsys)
 
+
 def test_var_scoping_default_global():
     assertv('d = 1; function x() { d=2;}; x(); d;', 2)
     assertv('d = 1; function x() { var d=2;}; x(); d;', 1)
@@ -146,6 +164,7 @@
     assertv('function x() { d=2;}; function y() { return d; }; x(); y();', 2)
     assertv('var d; function x() { d=2;}; function y() { return d; }; x(); 
y();', 2)
 
+
 def test_function_args():
     assertv("""
     x = function (t,r) {
@@ -154,6 +173,7 @@
     x(2,3);
     """, 5)
 
+
 def test_function_less_args(capsys):
     assertp("""
     x = function (t, r) {
@@ -162,6 +182,7 @@
     print(x(2));
     """, "NaN", capsys)
 
+
 def test_function_more_args():
     assertv("""
     x = function (t, r) {
@@ -170,6 +191,7 @@
     x(2,3,4);
     """, 5)
 
+
 def test_function_has_var():
     assertv("""
     x = function () {
@@ -179,6 +201,7 @@
     x();
     """, 'test')
 
+
 def test_function_arguments():
     assertv("""
     x = function () {
@@ -196,7 +219,7 @@
     x[1];
     """, 'test')
 
-@xfail
+
 def test_print_object(capsys):
     assertp("""
     x = {1:"test"};
@@ -209,6 +232,7 @@
     print(Object.prototype);
     """, "[object Object]", capsys)
 
+
 def test_array_initializer(capsys):
     assertp("""
     x = [];
@@ -216,20 +240,25 @@
     print(x.length)
     """, '\n0', capsys)
 
+
 def test_throw(capsys):
     from js.execution import JsThrowException
     asserte("throw(3);", JsThrowException)
 
+
 def test_group():
     assertv("(2+1);", 3)
 
+
 def test_comma():
     assertv("(500,3);", 3)
 
+
 def test_block(capsys):
     assertp("{print(5);}", '5', capsys)
     assertp("{3; print(5);}", '5', capsys)
 
+
 def test_try_catch_finally(capsys):
     assertp("""
     try {
@@ -251,6 +280,7 @@
     }
     """, "3\n5", capsys)
 
+
 def test_if_then(capsys):
     assertp("""
     if (1) {
@@ -258,6 +288,7 @@
     }
     """, "1", capsys)
 
+
 def test_if_then_else(capsys):
     assertp("""
     if (0) {
@@ -267,6 +298,7 @@
     }
     """, "2", capsys)
 
+
 def test_compare():
     assertv("1>0;", True)
     assertv("0>1;", False)
@@ -288,15 +320,18 @@
     assertv("1===1;", True)
     assertv("1!==1;", False)
 
+
 def test_string_compare():
     assertv("'aaa' > 'a';", True)
     assertv("'aaa' < 'a';", False)
     assertv("'a' > 'a';", False)
 
+
 def test_binary_opb(capsys):
     assertp("print(0||0); print(1||0);", "0\n1", capsys)
     assertp("print(0&&1); print(1&&1);", "0\n1", capsys)
 
+
 def test_while(capsys):
     assertp("""
     i = 0;
@@ -307,19 +342,22 @@
     print(i);
     """, "0\n1\n2\n3", capsys)
 
+
 def test_assignments():
     assertv("var x = 3; x += 4; x;", 7)
     assertv("x = 8; x -= 3; x;", 5)
-    assertv("x = {}; x.x = 3; x.x += 8; x.x", 8+3)
+    assertv("x = {}; x.x = 3; x.x += 8; x.x", 8 + 3)
     assertv("x = []; x[2] = 1; x[2]++;", 1)
     assertv("x = []; x[2] = 1; x[2]++; x[2]", 2)
 
+
 def test_object_creation():
     assertv("""
     o = new Object();
     o;
     """, "[object Object]")
 
+
 def test_var_decl(capsys):
     assertp("print(x); var x;", "undefined", capsys)
     assertp("""
@@ -331,6 +369,7 @@
     }
     """, "ReferenceError: z is not defined", capsys)
 
+
 def test_function_name(capsys):
     assertp("""
     function x() {
@@ -339,17 +378,20 @@
     x();
     """, "my name is x", capsys)
 
+
 def test_new_with_function():
-    c= """
+    c = """
     x = function() {this.info = 'hello';};
     o = new x();
     o.info;
     """
     assertv(c, "hello")
 
+
 def test_vars(capsys):
     assertp("var x;x=3; print(x);", "3", capsys)
 
+
 def test_in(capsys):
     assertp("""
     x = {y:3};
@@ -357,6 +399,7 @@
     print("z" in x);
     """, "true\nfalse", capsys)
 
+
 def test_for(capsys):
     assertp("""
     i = 0;
@@ -366,6 +409,7 @@
     print(i);
     """, "0\n1\n2\n3", capsys)
 
+
 def test_eval(capsys):
     assertp("""
     var x = 2;
@@ -373,16 +417,19 @@
     print(z);
     """, "3\n2", capsys)
 
+
 def test_eval_syntax_error():
     from js.execution import JsSyntaxError
     asserte("eval('var do =true;');", JsSyntaxError)
 
+
 def test_arrayobject():
     assertv("""
     var x = new Array();
     x.length == 0;
     """, 'true')
 
+
 def test_break(capsys):
     assertp("""
     while(1){
@@ -393,6 +440,7 @@
     }
     print('out');""", "out", capsys)
 
+
 def test_typeof():
     assertv("""
     var x = 3;
@@ -400,8 +448,11 @@
     """, True)
     assertv("typeof x", 'undefined')
 
+
 def test_semicolon(capsys):
     assertp(';', '', capsys)
+    assertv("1", 1)
+
 
 def test_newwithargs(capsys):
     assertp("""
@@ -409,6 +460,7 @@
     print(x);
     """, '1', capsys)
 
+
 def test_increment():
     assertv("""
     var x;
@@ -416,10 +468,12 @@
     x++;
     x;""", 2)
 
+
 def test_ternaryop():
     assertv("( 1 == 1 ) ? true : false;", True)
     assertv("( 1 == 0 ) ? true : false;", False)
 
+
 def test_booleanliterals(capsys):
     assertp("""
     var x = false;
@@ -427,18 +481,21 @@
     print(y);
     print(x);""", "true\nfalse", capsys)
 
+
 def test_unarynot(capsys):
     assertp("""
     var x = false;
     print(!x);
     print(!!x);""", "true\nfalse", capsys)
 
+
 def test_equals():
     assertv("""
     var x = 5;
     y = z = x;
     y;""", 5)
 
+
 def test_math_stuff(capsys):
     assertp("""
     var x = 5;
@@ -455,26 +512,31 @@
     print(-z);
     """, '10\n2\nfalse\n3\nNaN\nInfinity\n-Infinity\n3\nnull\n-2', capsys)
 
+
 def test_globalproperties(capsys):
-    assertp( """
+    assertp("""
     print(NaN);
     print(Infinity);
     print(undefined);
     """, 'NaN\nInfinity\nundefined', capsys)
 
+
 def test_strangefunc(capsys):
     assertp("""function f1() { var z; var t;}""", '', capsys)
     assertp(""" "'t'"; """, '', capsys)
 
+
 def test_null():
     from js.jsobj import w_Null
     assertv("null;", w_Null)
 
+
 def test_void(capsys):
     assertp("print(void print('hello'));", "hello\nundefined", capsys)
 
+
 def test_activationprob(capsys):
-    assertp( """
+    assertp("""
     function intern (int1){
         print(int1);
         return int1;
@@ -488,6 +550,7 @@
     print(ins.p2);
     """, '1\n1\n1', capsys)
 
+
 def test_array_acess(capsys):
     assertp("""
     var x = new Array();
@@ -501,6 +564,7 @@
     }
     """, '1\n2\n1\n2\n3', capsys)
 
+
 def test_array_length(capsys):
     assertp("""
     var testcases = new Array();
@@ -508,13 +572,16 @@
     print('tc'+tc);
     """, 'tc0', capsys)
 
+
 def test_mod_op(capsys):
     assertp("print(2%2);", '0', capsys)
 
+
 def test_unary_plus():
     assertv("+1;", 1)
     assertv("-1;", -1)
 
+
 def test_delete(capsys):
     assertp("""
     x = 0;
@@ -528,6 +595,7 @@
     print(x.y);
     """, 'undefined', capsys)
 
+
 def test_forin(capsys):
     assertp("""
     var x = {a:5};
@@ -536,6 +604,7 @@
     }
     """, 'a', capsys)
 
+
 def test_forinvar(capsys):
     assertp("""
     var x = {a:5};
@@ -544,12 +613,14 @@
     }
     """, 'a', capsys)
 
+
 def test_stricteq():
     assertv("2 === 2;", True)
     assertv("2 === 3;", False)
     assertv("2 !== 3;", True)
     assertv("2 !== 2;", False)
 
+
 def test_with(capsys):
     assertp("""
     var mock = {x:2};
@@ -568,6 +639,7 @@
     print(x);
     """, '4\n2\n3\n4', capsys)
 
+
 def test_with_expr(capsys):
     assertp("""
     var x = 4;
@@ -576,6 +648,7 @@
     }
     """, '2', capsys)
 
+
 def test_bitops():
     assertv("2 ^ 2;", 0)
     assertv("2 & 3;", 2)
@@ -585,22 +658,26 @@
     assertv("-2 >> 31", -1)
     assertv("-2 >>> 31;", 1)
 
+
 def test_for_vararg(capsys):
     assertp("""
     for (var arg = "", i = 0; i < 2; i++) { print(i);}
     """, '0\n1', capsys)
 
+
 def test_recursive_call():
     assertv("""
     function fact(x) { if (x == 0) { return 1; } else { return fact(x-1)*x; }}
     fact(3);
     """, 6)
 
+
 def test_function_prototype(capsys):
     assertp("""
     function foo() {}; foo.prototype.bar = function() {};
     """, '', capsys)
 
+
 def test_function_this(capsys):
     assertp("""
     function foo() {
@@ -611,6 +688,7 @@
     f.bar();
     """, 'debug', capsys)
 
+
 def test_inplace_assign():
     assertv("x=1; x+=1; x;", 2)
     assertv("x=1; x-=1; x;", 0)
@@ -621,12 +699,15 @@
     assertv("x=0; x|=1; x;", 1)
     assertv("x=2; x^=2; x;", 0)
 
+
 def test_not():
     assertv("~1", -2)
 
+
 def test_delete_member():
     assertv("x = 3; delete this.x", "true")
 
+
 def test_twoarray(capsys):
     assertp("""
     a1 = new Array();
@@ -637,16 +718,16 @@
     print(a1[0]);
     """, '1\n1', capsys)
 
-def test_semicolon():
-    assertv("1", 1)
 
 def test_functionjs():
     assertv("x = Function('return 1'); x()", 1)
 
+
 def test_octal_and_hex():
     assertv("010;", 8)
     assertv("0xF", 15)
 
+
 def test_switch():
     assertv("""
     x = 1;
@@ -661,11 +742,13 @@
         default: 30;
     };""", 30)
 
+
 def test_autoboxing():
     assertv("'abc'.charAt(0)", 'a')
     assertv("true.toString()", 'true')
     assertv("x=5; x.toString();", '5')
 
+
 def test_proper_prototype_inheritance():
     assertv("""
     Object.prototype.my = function() {return 1};
@@ -678,16 +761,19 @@
     x.my();
     """, 1)
 
+
 def test_new_without_args_really():
     assertv("var x = new Boolean; x.toString();", 'false')
 
+
 def test_pypy_repr():
     assertv("pypy_repr(3);", 'W_IntNumber(3)')
     # See optimization on astbuilder.py for a reason to the test below
     assertv("pypy_repr(3.0);", 'W_IntNumber(3)')
     assertv("pypy_repr(3.5);", 'W_FloatNumber(3.5)')
     import sys
-    assertv("x="+str(sys.maxint >> 1)+"; pypy_repr(x*x);", 
'W_FloatNumber(2.12676479326e+37)')
+    assertv("x=" + str(sys.maxint >> 1) + "; pypy_repr(x*x);", 
'W_FloatNumber(2.12676479326e+37)')
+
 
 def test_number(capsys):
     assertp("print(Number(void 0))", "NaN", capsys)
@@ -699,32 +785,39 @@
     print (Number(new MyObject(100)));
     """, "100", capsys)
 
+
 def test_decrement():
     assertv("""
     var x = 2;
     x--;
     x;""", 1)
 
+
 def test_member_increment():
     assertv("var x = {y:1}; x.y++; x.y;", 2)
     assertv("var x = {y:1}; x.y++;", 1)
 
+
 def test_member_decrement():
     assertv(" var x = {y:2}; x.y--; x.y;", 1)
     assertv(" var x = {y:2}; x.y--;", 2)
 
+
 def test_member_preincrement():
     assertv("var x = {y:1}; ++x.y; x.y;", 2)
     assertv("var x = {y:1}; ++x.y;", 2)
 
+
 def test_member_predecrement():
     assertv("var x = {y:2}; --x.y; x.y;", 1)
     assertv("var x = {y:2}; --x.y;", 1)
 
+
 def test_member_sub():
     assertv("var x = {y:10}; x.y-=5; x.y", 5)
     assertv("var x = {y:10}; x.y-=5;", 5)
 
+
 def switch_test_code(x):
     return """
     function f(x) {
@@ -753,6 +846,7 @@
     assertv(switch_test_code(2), 2)
     assertv(switch_test_code(3), 42)
 
+
 def switch_no_default_test_code(x):
     return """
     function f(x) {
@@ -767,9 +861,11 @@
     f(%(x)s);
     """ % {'x': x}
 
+
 def test_switch_no_default():
-     assertv(switch_no_default_test_code(0), 42)
-     assertv(switch_no_default_test_code(1), 2)
+    assertv(switch_no_default_test_code(0), 42)
+    assertv(switch_no_default_test_code(1), 2)
+
 
 def test_member_bitxor():
     assertv('var i = {x:0}; i.x^=0; i.x;', 0)
@@ -781,6 +877,7 @@
     assertv('var i = {x:1}; i.x^=1; i.x;', 0)
     assertv('var i = {x:1}; i.x^=1;', 0)
 
+
 def test_member_bitand():
     assertv('var i = {x:0}; i.x&=0; i.x;', 0)
     assertv('var i = {x:0}; i.x&=0;', 0)
@@ -791,6 +888,7 @@
     assertv('var i = {x:1}; i.x&=1; i.x;', 1)
     assertv('var i = {x:1}; i.x&=1;', 1)
 
+
 def test_member_bitor():
     assertv('var i = {x:0}; i.x|=0; i.x;', 0)
     assertv('var i = {x:0}; i.x|=0;', 0)
@@ -801,6 +899,7 @@
     assertv('var i = {x:1}; i.x|=1; i.x;', 1)
     assertv('var i = {x:1}; i.x|=1;', 1)
 
+
 def test_store_bitrsh():
     assertv('var i = 1; i>>=0; i;', 1)
     assertv('var i = 1; i>>=0;', 1)
@@ -813,6 +912,7 @@
     assertv('var i = 4; i>>=3; i;', 0)
     assertv('var i = 4; i>>=3;', 0)
 
+
 def test_loop_continue():
     assertv("""
       i = 0;
@@ -862,6 +962,7 @@
       n;
     """, 400)
 
+
 def test_partial_for_loop():
     assertv("""
     var i = 0;
@@ -897,6 +998,7 @@
     i;
     """, 2)
 
+
 def test_compare_string_null():
     assertv("""
     var x;
@@ -908,22 +1010,27 @@
     x;
     """, False)
 
+
 def test_math_random():
     assertv("var x = Math.random(); var y = Math.random(); x == y;", False)
 
+
 def test_math_min():
     assertv("Math.min(1, 2);", 1)
     assertv("Math.min(0, 2);", 0)
     assertv("Math.min(-1, 1);", -1)
 
+
 def test_math_max():
     assertv("Math.max(1, 2);", 2)
     assertv("Math.max(0, 2);", 2)
     assertv("Math.max(-1, 1);", 1)
 
+
 def test_date_get_time():
     assertv("var i = new Date(); i.valueOf() == i.getTime()", True)
 
+
 def test_declare_local_var():
     assertv("""
     function f() {
@@ -947,13 +1054,16 @@
     f();
     """, 12)
 
+
 def test_empty_function_with_params():
     assertv("x = function(x) { }; x(); false", False)
 
+
 def test_params_order(capsys):
-    assertp("function f(a, b, c, d) { return print([a, b, c, d]) }; 
f(1,2,3,4)", "1,2,3,4", capsys);
-    assertp("function f(z, y, x, w) { return print([z, y, x, w]) }; 
f(1,2,3,4)", "1,2,3,4", capsys);
-    assertp("function f(n, d, e, a) { return print([n, d, e, a]) }; 
f(1,2,3,4)", "1,2,3,4", capsys);
+    assertp("function f(a, b, c, d) { return print([a, b, c, d]) }; 
f(1,2,3,4)", "1,2,3,4", capsys)
+    assertp("function f(z, y, x, w) { return print([z, y, x, w]) }; 
f(1,2,3,4)", "1,2,3,4", capsys)
+    assertp("function f(n, d, e, a) { return print([n, d, e, a]) }; 
f(1,2,3,4)", "1,2,3,4", capsys)
+
 
 def test_function_without_implicit_return_value():
     assertv("""
@@ -965,16 +1075,25 @@
     1;
     """, 1)
 
+
 def test_boolean_constructor():
     assertv("typeof Boolean(true)", 'boolean')
     assertv("typeof new Boolean(true)", 'object')
 
+
 def test_return_trycatch():
     assertv("function f() { try { return 1; } catch(e) { return -1; } }; f()", 
1)
     assertv("function f() { try { throw('foo'); return 1; } catch(e) { return 
-1; } }; f()", -1)
     assertv("function f() { try { throw('foo'); return 1; } catch(e) { return 
-1; } finally { return 0; } }; f()", 0)
     assertv("function f() { try { throw('foo'); return 1; } finally { return 
0; } }; f()", 0)
 
+
+def test_try_catch_loop():
+    assertv("try { x = 1; } catch(e) { }; 0", 0)
+    assertv("function g() { throw(1) } function f() { for(i=0; i < 3; i++) { 
try { x = g(); } catch(e) { } } } f(); 0", 0)
+    assertv("function f() { for(i=0; i < 3; i++) { try { x = 1; } catch(e) { } 
} } f(); 0", 0)
+
+
 def test_instanceof():
-    assertv("function f(){this.a = 1;}; x = new f(); x instanceof f;", True);
-    assertv("function f(){this.a = 1;}; function g(){this.a = b;}; x = new 
f(); x instanceof g;", False);
+    assertv("function f(){this.a = 1;}; x = new f(); x instanceof f;", True)
+    assertv("function f(){this.a = 1;}; function g(){this.a = b;}; x = new 
f(); x instanceof g;", False)
diff --git a/js/test/test_interpreter.py b/js/test/test_interpreter.py
--- a/js/test/test_interpreter.py
+++ b/js/test/test_interpreter.py
@@ -1,11 +1,11 @@
-import py
 from js.jsobj import _w
 from js.interpreter import Interpreter
 from js.astbuilder import parse_to_ast
 
+
 class TestInterpreter(object):
     def test_foo1(self):
-        src = '''
+        src = u'''
         var a = 40;
         var b = 2;
         a + b;
diff --git a/js/test/test_jsfunciton.py b/js/test/test_jsfunction.py
rename from js/test/test_jsfunciton.py
rename to js/test/test_jsfunction.py
--- a/js/test/test_jsfunciton.py
+++ b/js/test/test_jsfunction.py
@@ -1,5 +1,3 @@
-import py
-#from js.jscode import _JsFunction
 from js.jsobj import _w
 from js.jscode import JsCode
 from js.execution_context import ExecutionContext, FunctionExecutionContext, 
GlobalExecutionContext, EvalExecutionContext
@@ -9,6 +7,18 @@
 from js.jscode import ast_to_bytecode
 from js.jsobj import W_BasicObject
 
+
+class FakeInterpreter(object):
+    from js.interpreter import InterpreterConfig
+    config = InterpreterConfig()
+
+from js.object_space import object_space
+object_space.interpreter = FakeInterpreter()
+
+from js.jsobj import W_GlobalObject
+object_space.global_object = W_GlobalObject()
+
+
 class TestJsFunctionAndStuff(object):
     def test_foo1(self):
         code = JsCode()
@@ -18,7 +28,7 @@
         code.emit('RETURN')
 
         f = JsExecutableCode(code)
-        ctx = ExecutionContext()
+        ctx = ExecutionContext(stack_size=f.estimated_stack_size())
         res = f.run(ctx)
         assert res.value == _w(2)
 
@@ -29,7 +39,7 @@
         code.emit('ADD')
         code.emit('RETURN')
 
-        f = JsFunction('foo', code)
+        f = JsFunction(u'foo', code)
         ctx = FunctionExecutionContext(f)
         res = f.run(ctx)
 
@@ -37,147 +47,147 @@
 
     def test_foo3(self):
         symbol_map = SymbolMap()
-        var_idx = symbol_map.add_variable('a')
+        var_idx = symbol_map.add_variable(u'a')
 
         code = JsCode(symbol_map)
-        code.emit('LOAD_VARIABLE', var_idx, 'a')
+        code.emit('LOAD_VARIABLE', var_idx, u'a')
         code.emit('RETURN')
 
-        f = JsFunction('foo', code)
-        ctx = FunctionExecutionContext(f, argv = [_w(42)], formal_parameters = 
['a'])
+        f = JsFunction(u'foo', code)
+        ctx = FunctionExecutionContext(f, argv=[_w(42)], 
formal_parameters=[u'a'])
 
         res = f.run(ctx)
         assert res.value == _w(42)
 
     def test_foo4(self):
         symbol_map = SymbolMap()
-        var_idx_a = symbol_map.add_variable('a')
-        var_idx_b = symbol_map.add_parameter('b')
+        var_idx_a = symbol_map.add_variable(u'a')
+        var_idx_b = symbol_map.add_parameter(u'b')
 
         code = JsCode(symbol_map)
-        code.emit('LOAD_VARIABLE', var_idx_a, 'a')
-        code.emit('LOAD_VARIABLE', var_idx_b, 'b')
+        code.emit('LOAD_VARIABLE', var_idx_a, u'a')
+        code.emit('LOAD_VARIABLE', var_idx_b, u'b')
         code.emit('ADD')
         code.emit('RETURN')
 
-        f = JsFunction('foo', code)
+        f = JsFunction(u'foo', code)
 
-        ctx = FunctionExecutionContext(f, formal_parameters = ['b'], argv = 
[_w(21)])
+        ctx = FunctionExecutionContext(f, formal_parameters=[u'b'], 
argv=[_w(21)])
 
         lex = ctx.variable_environment()
         env_rec = lex.environment_record
-        env_rec.set_mutable_binding('a', _w(21))
+        env_rec.set_mutable_binding(u'a', _w(21), False)
 
         res = f.run(ctx)
         assert res.value == _w(42)
 
     def test_foo5(self):
         symbol_map = SymbolMap()
-        var_idx_a = symbol_map.add_variable('a')
-        var_idx_b = symbol_map.add_parameter('b')
+        var_idx_a = symbol_map.add_variable(u'a')
+        var_idx_b = symbol_map.add_parameter(u'b')
 
         code = JsCode(symbol_map)
-        code.emit('LOAD_VARIABLE', var_idx_a, 'a')
-        code.emit('LOAD_VARIABLE', var_idx_b, 'b')
+        code.emit('LOAD_VARIABLE', var_idx_a, u'a')
+        code.emit('LOAD_VARIABLE', var_idx_b, u'b')
         code.emit('ADD')
-        code.emit('STORE', var_idx_a, 'a')
+        code.emit('STORE', var_idx_a, u'a')
         code.emit('RETURN')
 
-        f = JsFunction('foo', code)
-        ctx = FunctionExecutionContext(f, formal_parameters = ['b'], argv = 
[_w(21)])
+        f = JsFunction(u'foo', code)
+        ctx = FunctionExecutionContext(f, formal_parameters=[u'b'], 
argv=[_w(21)])
 
         lex_env = ctx.variable_environment()
         env_rec = lex_env.environment_record
-        env_rec.set_mutable_binding('a', _w(21))
+        env_rec.set_mutable_binding(u'a', _w(21), False)
 
         res = f.run(ctx)
 
-        assert env_rec.get_binding_value('a') == _w(42)
+        assert env_rec.get_binding_value(u'a') == _w(42)
         assert res.value == _w(42)
 
     def test_foo6(self):
         symbol_map = SymbolMap()
-        var_idx_a = symbol_map.add_variable('a')
-        var_idx_b = symbol_map.add_symbol('b')
+        var_idx_a = symbol_map.add_variable(u'a')
+        var_idx_b = symbol_map.add_symbol(u'b')
 
         code = JsCode(symbol_map)
-        code.emit('LOAD_VARIABLE', var_idx_a, 'a')
-        code.emit('LOAD_VARIABLE', var_idx_b, 'b')
+        code.emit('LOAD_VARIABLE', var_idx_a, u'a')
+        code.emit('LOAD_VARIABLE', var_idx_b, u'b')
         code.emit('ADD')
-        code.emit('STORE', var_idx_a, 'a')
+        code.emit('STORE', var_idx_a, u'a')
         code.emit('RETURN')
 
         outer_env = DeclarativeEnvironment()
         outer_env_rec = outer_env.environment_record
 
-        f = JsFunction('foo', code)
+        f = JsFunction(u'foo', code)
 
-        ctx = FunctionExecutionContext(f, scope = outer_env)
+        ctx = FunctionExecutionContext(f, scope=outer_env)
 
         lex_env = ctx.variable_environment()
         env_rec = lex_env.environment_record
 
-        env_rec.set_mutable_binding('a', _w(21))
+        env_rec.set_mutable_binding(u'a', _w(21), False)
 
-        outer_env_rec.create_mutuable_binding('b', True)
-        outer_env_rec.set_mutable_binding('b', _w(21))
+        outer_env_rec.create_mutuable_binding(u'b', True)
+        outer_env_rec.set_mutable_binding(u'b', _w(21), False)
 
         res = f.run(ctx)
 
-        assert env_rec.get_binding_value('a') == _w(42)
-        assert outer_env_rec.get_binding_value('b') == _w(21)
+        assert env_rec.get_binding_value(u'a') == _w(42)
+        assert outer_env_rec.get_binding_value(u'b') == _w(21)
         assert res.value == _w(42)
 
     def test_foo7(self):
         symbol_map = SymbolMap()
-        var_idx_a = symbol_map.add_variable('a')
-        var_idx_b = symbol_map.add_symbol('b')
+        var_idx_a = symbol_map.add_variable(u'a')
+        var_idx_b = symbol_map.add_symbol(u'b')
 
         code = JsCode(symbol_map)
-        code.emit('LOAD_VARIABLE', var_idx_a, 'a')
-        code.emit('LOAD_VARIABLE', var_idx_b, 'b')
+        code.emit('LOAD_VARIABLE', var_idx_a, u'a')
+        code.emit('LOAD_VARIABLE', var_idx_b, u'b')
         code.emit('ADD')
-        code.emit('STORE', var_idx_b, 'b')
+        code.emit('STORE', var_idx_b, u'b')
         code.emit('RETURN')
 
         outer_env = DeclarativeEnvironment()
         outer_env_rec = outer_env.environment_record
 
-        f = JsFunction('foo', code)
+        f = JsFunction(u'foo', code)
 
-        ctx = FunctionExecutionContext(f, scope = outer_env)
+        ctx = FunctionExecutionContext(f, scope=outer_env)
 
         lex_env = ctx.variable_environment()
         env_rec = lex_env.environment_record
 
-        env_rec.set_mutable_binding('a', _w(21))
+        env_rec.set_mutable_binding(u'a', _w(21), False)
 
-        outer_env_rec.create_mutuable_binding('b', True)
-        outer_env_rec.set_mutable_binding('b', _w(21))
+        outer_env_rec.create_mutuable_binding(u'b', True)
+        outer_env_rec.set_mutable_binding(u'b', _w(21), False)
 
         res = f.run(ctx)
 
-        assert env_rec.get_binding_value('a') == _w(21)
-        assert outer_env_rec.get_binding_value('b') == _w(42)
+        assert env_rec.get_binding_value(u'a') == _w(21)
+        assert outer_env_rec.get_binding_value(u'b') == _w(42)
         assert res.value == _w(42)
 
     def test_foo8(self):
         symbol_map = SymbolMap()
-        var_idx_a = symbol_map.add_variable('a')
-        var_idx_b = symbol_map.add_variable('b')
-        var_idx_c = symbol_map.add_variable('c')
+        var_idx_a = symbol_map.add_variable(u'a')
+        var_idx_b = symbol_map.add_variable(u'b')
+        var_idx_c = symbol_map.add_variable(u'c')
 
         code = JsCode(symbol_map)
         code.emit('LOAD_INTCONSTANT', 21)
-        code.emit('STORE', var_idx_a, 'a')
+        code.emit('STORE', var_idx_a, u'a')
         code.emit('POP')
         code.emit('LOAD_INTCONSTANT', 21)
-        code.emit('STORE', var_idx_b, 'b')
+        code.emit('STORE', var_idx_b, u'b')
         code.emit('POP')
-        code.emit('LOAD_VARIABLE', var_idx_a, 'a')
-        code.emit('LOAD_VARIABLE', var_idx_b, 'b')
+        code.emit('LOAD_VARIABLE', var_idx_a, u'a')
+        code.emit('LOAD_VARIABLE', var_idx_b, u'b')
         code.emit('ADD')
-        code.emit('STORE', var_idx_c, 'c')
+        code.emit('STORE', var_idx_c, u'c')
         code.emit('RETURN')
 
         f = JsGlobalCode(code)
@@ -190,13 +200,13 @@
         lex_env = ctx.variable_environment()
         env_rec = lex_env.environment_record
 
-        assert env_rec.get_binding_value('a') == _w(21)
-        assert env_rec.get_binding_value('b') == _w(21)
-        assert env_rec.get_binding_value('c') == _w(42)
+        assert env_rec.get_binding_value(u'a') == _w(21)
+        assert env_rec.get_binding_value(u'b') == _w(21)
+        assert env_rec.get_binding_value(u'c') == _w(42)
         assert res.value == _w(42)
 
     def test_foo9(self):
-        src = '''
+        src = u'''
         var a = 21;
         var b = 21;
         var c = a + b;
@@ -216,13 +226,13 @@
         lex_env = ctx.variable_environment()
         env_rec = lex_env.environment_record
 
-        assert env_rec.get_binding_value('a') == _w(21)
-        assert env_rec.get_binding_value('b') == _w(21)
-        assert env_rec.get_binding_value('c') == _w(42)
+        assert env_rec.get_binding_value(u'a') == _w(21)
+        assert env_rec.get_binding_value(u'b') == _w(21)
+        assert env_rec.get_binding_value(u'c') == _w(42)
         assert res.value == _w(42)
 
     def test_foo10(self):
-        src = '''
+        src = u'''
         function f() {
             return 42;
         }
@@ -235,18 +245,19 @@
         code = ast_to_bytecode(ast, symbol_map)
 
         f = JsGlobalCode(code)
+        w_global = W_BasicObject()
 
-        ctx = GlobalExecutionContext(f)
+        ctx = GlobalExecutionContext(f, w_global)
         res = f.run(ctx)
 
         lex_env = ctx.variable_environment()
         env_rec = lex_env.environment_record
 
-        assert env_rec.get_binding_value('a') == _w(42)
+        assert env_rec.get_binding_value(u'a') == _w(42)
         assert res.value == _w(42)
 
-    def test_foo10(self):
-        src = '''
+    def test_foo11(self):
+        src = u'''
         function f(b) {
             var c = 21;
             return b + c;
@@ -268,13 +279,13 @@
         lex_env = ctx.variable_environment()
         env_rec = lex_env.environment_record
 
-        assert env_rec.get_binding_value('a') == _w(42)
-        assert env_rec.has_binding('b') is False
-        assert env_rec.has_binding('c') is False
+        assert env_rec.get_binding_value(u'a') == _w(42)
+        assert env_rec.has_binding(u'b') is False
+        assert env_rec.has_binding(u'c') is False
         assert res.value == _w(42)
 
-    def test_foo11(self):
-        src = '''
+    def test_foo12(self):
+        src = u'''
         function fib(n) {
             if(n<2) {
                 return n;
@@ -297,7 +308,7 @@
 
         assert res.value == _w(55)
 
-    def test_foo12(self):
+    def test_foo13(self):
         def f(this, args):
             a = args[0].ToInteger()
             return _w(a + 1)
@@ -308,7 +319,7 @@
 
         assert res.value == _w(42)
 
-    def test_foo13(self):
+    def test_foo14(self):
         def f(this, args):
             a = args[0].ToInteger()
             return _w(a + 1)
@@ -319,9 +330,9 @@
         w_func = W__Function(func)
 
         w_global = W_BasicObject()
-        w_global.put('f', w_func)
+        w_global.put(u'f', w_func)
 
-        src = '''
+        src = u'''
         return f(41);
         '''
 
@@ -335,19 +346,20 @@
 
         assert res.value == _w(42)
 
-    def test_foo14(self):
+    def test_foo15(self):
         code = JsCode()
         code.emit('LOAD_INTCONSTANT', 1)
         code.emit('LOAD_INTCONSTANT', 1)
         code.emit('ADD')
 
         f = JsExecutableCode(code)
-        ctx = ExecutionContext()
+
+        ctx = ExecutionContext(stack_size=f.estimated_stack_size())
         res = f.run(ctx)
         assert res.value == _w(2)
 
-    def test_foo15(self):
-        src = '''
+    def test_foo16(self):
+        src = u'''
         a = 1;
         b = 41;
         a + b;
@@ -355,8 +367,8 @@
         res = self.run_src(src)
         assert res == _w(42)
 
-    def test_foo16(self):
-        src = '''
+    def test_foo17(self):
+        src = u'''
         function f() {
             a = 42;
         }
@@ -367,8 +379,8 @@
         res = self.run_src(src)
         assert res == _w(42)
 
-    def test_foo17(self):
-        src = '''
+    def test_foo18(self):
+        src = u'''
         a = 42;
         this.a;
         '''
@@ -376,16 +388,16 @@
         res = self.run_src(src)
         assert res == _w(42)
 
-    def test_foo18(self):
-        src = '''
+    def test_foo19(self):
+        src = u'''
         function x() { d=2; return d;}; x();
         '''
 
         res = self.run_src(src)
         assert res == _w(2)
 
-    def test_foo19(self):
-        src = '''
+    def test_foo20(self):
+        src = u'''
         ;
         '''
 
@@ -397,7 +409,7 @@
         global_object = W_BasicObject()
         global_ctx = GlobalExecutionContext(global_code, global_object)
 
-        src = '''
+        src = u'''
         a = 1;
         '''
 
@@ -407,7 +419,7 @@
 
         f = JsEvalCode(code)
 
-        ctx = EvalExecutionContext(f, calling_context = global_ctx)
+        ctx = EvalExecutionContext(f, calling_context=global_ctx)
         res = f.run(ctx)
 
         assert res.value == _w(1)
@@ -420,6 +432,7 @@
         c = JsGlobalCode(code)
 
         w_global = W_BasicObject()
+        object_space.global_object = w_global
         ctx = GlobalExecutionContext(c, w_global)
         res = c.run(ctx)
         return res.value
diff --git a/js/test/test_jsobj.py b/js/test/test_jsobj.py
--- a/js/test/test_jsobj.py
+++ b/js/test/test_jsobj.py
@@ -1,37 +1,37 @@
-import py
 from js.jsobj import W_BasicObject, PropertyDescriptor
 
+
 class TestWObjectProperties(object):
     def test_has_property(self):
         obj = W_BasicObject()
-        assert obj.has_property('foo') is False
+        assert obj.has_property(u'foo') is False
 
     def test_define_property(self):
         obj = W_BasicObject()
 
-        desc = PropertyDescriptor(enumerable = True, configurable = True)
-        obj.define_own_property('foo', desc)
-        assert obj.has_property('foo') is True
+        desc = PropertyDescriptor(enumerable=True, configurable=True)
+        obj.define_own_property(u'foo', desc)
+        assert obj.has_property(u'foo') is True
 
     def test_define_data_property(self):
         obj = W_BasicObject()
 
-        desc = PropertyDescriptor(value = 1)
-        obj.define_own_property('foo', desc)
-        assert obj.has_property('foo') is True
+        desc = PropertyDescriptor(value=1)
+        obj.define_own_property(u'foo', desc)
+        assert obj.has_property(u'foo') is True
 
     def test_get(self):
         obj = W_BasicObject()
 
-        desc = PropertyDescriptor(value = 1)
-        obj.define_own_property('foo', desc)
-        assert obj.get('foo') == 1
+        desc = PropertyDescriptor(value=1, writable=True)
+        obj.define_own_property(u'foo', desc)
+        assert obj.get(u'foo') == 1
 
     def test_put(self):
         obj = W_BasicObject()
 
-        obj.put('foo', 1)
-        assert obj.get('foo') == 1
+        obj.put(u'foo', 1)
+        assert obj.get(u'foo') == 1
 
 #def test_intnumber():
     #n = W_IntNumber(0x80000000)
diff --git a/js/test/test_lexical_environment.py 
b/js/test/test_lexical_environment.py
--- a/js/test/test_lexical_environment.py
+++ b/js/test/test_lexical_environment.py
@@ -1,56 +1,57 @@
-import py
 from js.lexical_environment import DeclarativeEnvironment, ObjectEnvironment
 from js.jsobj import w_Undefined, W_BasicObject
 
+
 class TestDeclarativeEnvironment(object):
     def test_get_identifier_reference_empty(self):
         lex_env = DeclarativeEnvironment()
-        ref = lex_env.get_identifier_reference('foo')
+        ref = lex_env.get_identifier_reference(u'foo')
 
-        assert ref.base_value == w_Undefined
-        assert ref.referenced == 'foo'
+        assert ref.base_value is None
+        assert ref.referenced == u'foo'
 
     def test_get_identifier_reference(self):
         lex_env = DeclarativeEnvironment()
 
         env_rec = lex_env.environment_record
-        env_rec.create_mutuable_binding('foo', True)
+        env_rec.create_mutuable_binding(u'foo', True)
 
-        ref = lex_env.get_identifier_reference('foo')
-        assert ref.base_value == env_rec
+        ref = lex_env.get_identifier_reference(u'foo')
+        assert ref.base_env == env_rec
         assert ref.referenced == 'foo'
 
     def test_get_identifier_reference_from_parent(self):
         outer_lex_env = DeclarativeEnvironment()
         outer_env_rec = outer_lex_env.environment_record
-        outer_env_rec.create_mutuable_binding('foo', True)
+        outer_env_rec.create_mutuable_binding(u'foo', True)
 
         lex_env = DeclarativeEnvironment(outer_lex_env)
 
-        ref = lex_env.get_identifier_reference('foo')
-        assert ref.base_value == outer_env_rec
+        ref = lex_env.get_identifier_reference(u'foo')
+        assert ref.base_env == outer_env_rec
         assert ref.referenced == 'foo'
 
     def test_get_identifier_reference_overwrite_parent(self):
         outer_lex_env = DeclarativeEnvironment()
         outer_env_rec = outer_lex_env.environment_record
-        outer_env_rec.create_mutuable_binding('foo', True)
+        outer_env_rec.create_mutuable_binding(u'foo', True)
 
         lex_env = DeclarativeEnvironment(outer_lex_env)
         env_rec = lex_env.environment_record
-        env_rec.create_mutuable_binding('foo', True)
+        env_rec.create_mutuable_binding(u'foo', True)
 
-        ref = lex_env.get_identifier_reference('foo')
-        assert ref.base_value == env_rec
+        ref = lex_env.get_identifier_reference(u'foo')
+        assert ref.base_env == env_rec
         assert ref.referenced == 'foo'
 
+
 class TestObjectEnvironment(object):
     def test_get_identifier_reference_empty(self):
         obj = W_BasicObject()
         lex_env = ObjectEnvironment(obj)
-        ref = lex_env.get_identifier_reference('foo')
+        ref = lex_env.get_identifier_reference(u'foo')
 
-        assert ref.base_value == w_Undefined
+        assert ref.base_value is None
         assert ref.referenced == 'foo'
 
     def test_get_identifier_reference(self):
@@ -58,35 +59,34 @@
         lex_env = ObjectEnvironment(obj)
 
         env_rec = lex_env.environment_record
-        env_rec.create_mutuable_binding('foo', True)
+        env_rec.create_mutuable_binding(u'foo', True)
 
-        ref = lex_env.get_identifier_reference('foo')
-        assert ref.base_value == env_rec
+        ref = lex_env.get_identifier_reference(u'foo')
+        assert ref.base_env == env_rec
         assert ref.referenced == 'foo'
 
     def test_get_identifier_reference_from_parent(self):
         outer_lex_env = DeclarativeEnvironment()
         outer_env_rec = outer_lex_env.environment_record
-        outer_env_rec.create_mutuable_binding('foo', True)
+        outer_env_rec.create_mutuable_binding(u'foo', True)
 
         obj = W_BasicObject()
         lex_env = ObjectEnvironment(obj, outer_lex_env)
 
-        ref = lex_env.get_identifier_reference('foo')
-        assert ref.base_value == outer_env_rec
-        assert ref.referenced == 'foo'
+        ref = lex_env.get_identifier_reference(u'foo')
+        assert ref.base_env == outer_env_rec
+        assert ref.referenced == u'foo'
 
     def test_get_identifier_reference_overwrite_parent(self):
         outer_lex_env = DeclarativeEnvironment()
         outer_env_rec = outer_lex_env.environment_record
-        outer_env_rec.create_mutuable_binding('foo', True)
+        outer_env_rec.create_mutuable_binding(u'foo', True)
 
         obj = W_BasicObject()
         lex_env = ObjectEnvironment(obj, outer_lex_env)
         env_rec = lex_env.environment_record
-        env_rec.create_mutuable_binding('foo', True)
+        env_rec.create_mutuable_binding(u'foo', True)
 
-        ref = lex_env.get_identifier_reference('foo')
-        assert ref.base_value == env_rec
-        assert ref.referenced == 'foo'
-
+        ref = lex_env.get_identifier_reference(u'foo')
+        assert ref.base_env == env_rec
+        assert ref.referenced == u'foo'
diff --git a/js/test/test_object_map.py b/js/test/test_object_map.py
--- a/js/test/test_object_map.py
+++ b/js/test/test_object_map.py
@@ -2,6 +2,7 @@
 
 from js.object_map import Map, MapRoot, MapNode
 
+
 class TestMap(object):
     def setup_class(cls):
         pass
@@ -134,42 +135,3 @@
         assert a.lookup('baz') == 1
 
         assert a == b
-
-    def test_add_with_flags(self):
-        r = MapRoot()
-        a = r.add('foo', 23)
-        a = a.add('bar')
-        b = r.add('foo', 42)
-        b = b.add('bar')
-
-        assert a.lookup('foo') == 0
-        assert a.lookup('bar') == 1
-
-        assert b.lookup('foo') == 0
-        assert b.lookup('bar') == 1
-
-        assert a.lookup_flag('foo') == 23
-        assert a.lookup_flag('bar') == 0
-        assert b.lookup_flag('foo') == 42
-        assert b.lookup_flag('bar') == 0
-
-    def test_set_flags(self):
-        r = MapRoot()
-        a = r.add('foo', 23)
-        a = a.add('bar')
-        a = a.add('baz')
-        b = r.add('foo', 42)
-        b = b.add('bar')
-        b = b.add('baz')
-
-
-        c = a.set_flags('bar', 42)
-        d = b.set_flags('bar', 23)
-
-        assert a.lookup_flag('bar') == 0
-        assert b.lookup_flag('bar') == 0
-        assert c.lookup_flag('bar') == 42
-        assert d.lookup_flag('bar') == 23
-
-        assert a.back.back == c.back.back
-        assert b.back.back == d.back.back
diff --git a/js/test/test_parser.py b/js/test/test_parser.py
--- a/js/test/test_parser.py
+++ b/js/test/test_parser.py
@@ -9,7 +9,7 @@
 from js.astbuilder import FakeParseError
 from js.astbuilder import ASTBuilder
 from js.jscode import JsCode
-import sys
+
 
 xfail = py.test.mark.xfail
 
diff --git a/js/test/test_stack.py b/js/test/test_stack.py
--- a/js/test/test_stack.py
+++ b/js/test/test_stack.py
@@ -81,7 +81,7 @@
         s = Stack(2, False)
         s.append(1)
         s.append(1)
-        py.test.raises(IndexError, s.append,1)
+        py.test.raises(AssertionError, s.append,1)
 
     def test_stack_resize(self):
         s = Stack(0)
diff --git a/js/test/test_w_string.py b/js/test/test_w_string.py
--- a/js/test/test_w_string.py
+++ b/js/test/test_w_string.py
@@ -1,6 +1,5 @@
-import py
+from js.jsobj import W_String
 
-from js.jsobj import W_String
 
 def test_string_to_number():
     assert W_String(u'').ToNumber() == 0
@@ -10,9 +9,10 @@
     assert W_String(u'\r').ToNumber() == 0
     assert W_String(u'\r\n').ToNumber() == 0
 
+
 def test_isspace():
-    from js.jsobj import _isspace
-    assert _isspace(' ') is True
-    assert _isspace('    ') is True
-    assert _isspace('  \t\t\r\n  ') is True
-    assert _isspace('  \t\ts\r\n  ') is False
+    from js.builtins_global import _strip
+    assert _strip(u' ') == u''
+    assert _strip(u'    ') == u''
+    assert _strip(u'  \t\t\r\n  ') == u''
+    assert _strip(u'  \t\ts\r\n  ') == u's'
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