diff --git a/addons/web/__openerp__.py b/addons/web/__openerp__.py
index 822d2fa3cbf..f64f853d0ea 100644
--- a/addons/web/__openerp__.py
+++ b/addons/web/__openerp__.py
@@ -39,6 +39,7 @@ This module provides the core of the OpenERP Web Client.
         "static/lib/cleditor/jquery.cleditor.js",
         "static/lib/py.js/lib/py.js",
         "static/src/js/boot.js",
+        "static/src/js/pyeval.js",
         "static/src/js/corelib.js",
         "static/src/js/coresetup.js",
         "static/src/js/dates.js",
diff --git a/addons/web/static/src/js/boot.js b/addons/web/static/src/js/boot.js
index 844dd88a0ac..dd014846884 100644
--- a/addons/web/static/src/js/boot.js
+++ b/addons/web/static/src/js/boot.js
@@ -48,7 +48,7 @@
  * OpenERP Web web module split
  *---------------------------------------------------------*/
 openerp.web = function(session) {
-    var files = ["corelib","coresetup","dates","formats","chrome","data","views","search","list","form","list_editable","web_mobile","view_tree","data_export","data_import"];
+    var files = ["pyeval", "corelib","coresetup","dates","formats","chrome","data","views","search","list","form","list_editable","web_mobile","view_tree","data_export","data_import"];
     for(var i=0; i<files.length; i++) {
         if(openerp.web[files[i]]) {
             openerp.web[files[i]](session);
diff --git a/addons/web/static/src/js/corelib.js b/addons/web/static/src/js/corelib.js
index a46d6314ebe..bc506161db5 100644
--- a/addons/web/static/src/js/corelib.js
+++ b/addons/web/static/src/js/corelib.js
@@ -991,154 +991,6 @@ instance.web.JsonRPC = instance.web.CallbackEnabled.extend({
         this.server = this.origin; // keep chs happy
         this.rpc_function = (this.origin == window_origin) ? this.rpc_json : this.rpc_jsonp;
     },
-    test_eval_get_context: function () {
-        var asJS = function (arg) {
-            if (arg instanceof py.object) {
-                return arg.toJSON();
-            }
-            return arg;
-        };
-
-        var datetime = new py.object();
-        datetime.datetime = new py.type(function datetime() {
-            throw new Error('datetime.datetime not implemented');
-        });
-        var date = datetime.date = new py.type(function date(y, m, d) {
-            if (y instanceof Array) {
-                d = y[2];
-                m = y[1];
-                y = y[0];
-            }
-            this.year = asJS(y);
-            this.month = asJS(m);
-            this.day = asJS(d);
-        }, py.object, {
-            strftime: function (args) {
-                var f = asJS(args[0]), self = this;
-                return new py.str(f.replace(/%([A-Za-z])/g, function (m, c) {
-                    switch (c) {
-                    case 'Y': return self.year;
-                    case 'm': return _.str.sprintf('%02d', self.month);
-                    case 'd': return _.str.sprintf('%02d', self.day);
-                    }
-                    throw new Error('ValueError: No known conversion for ' + m);
-                }));
-            }
-        });
-        date.__getattribute__ = function (name) {
-            if (name === 'today') {
-                return date.today;
-            }
-            throw new Error("AttributeError: object 'date' has no attribute '" + name +"'");
-        };
-        date.today = new py.def(function () {
-            var d = new Date();
-            return new date(d.getUTCFullYear(), d.getUTCMonth() + 1, d.getUTCDate());
-        });
-        datetime.time = new py.type(function time() {
-            throw new Error('datetime.time not implemented');
-        });
-
-        var time = new py.object();
-        time.strftime = new py.def(function (args) {
-            return date.today.__call__().strftime(args);
-        });
-
-        var relativedelta = new py.type(function relativedelta(args, kwargs) {
-            if (!_.isEmpty(args)) {
-                throw new Error('Extraction of relative deltas from existing datetimes not supported');
-            }
-            this.ops = kwargs;
-        }, py.object, {
-            __add__: function (other) {
-                if (!(other instanceof datetime.date)) {
-                    return py.NotImplemented;
-                }
-                // TODO: test this whole mess
-                var year = asJS(this.ops.year) || asJS(other.year);
-                if (asJS(this.ops.years)) {
-                    year += asJS(this.ops.years);
-                }
-
-                var month = asJS(this.ops.month) || asJS(other.month);
-                if (asJS(this.ops.months)) {
-                    month += asJS(this.ops.months);
-                    // FIXME: no divmod in JS?
-                    while (month < 1) {
-                        year -= 1;
-                        month += 12;
-                    }
-                    while (month > 12) {
-                        year += 1;
-                        month -= 12;
-                    }
-                }
-
-                var lastMonthDay = new Date(year, month, 0).getDate();
-                var day = asJS(this.ops.day) || asJS(other.day);
-                if (day > lastMonthDay) { day = lastMonthDay; }
-                var days_offset = ((asJS(this.ops.weeks) || 0) * 7) + (asJS(this.ops.days) || 0);
-                if (days_offset) {
-                    day = new Date(year, month-1, day + days_offset).getDate();
-                }
-                // TODO: leapdays?
-                // TODO: hours, minutes, seconds? Not used in XML domains
-                // TODO: weekday?
-                return new datetime.date(year, month, day);
-            },
-            __radd__: function (other) {
-                return this.__add__(other);
-            },
-
-            __sub__: function (other) {
-                if (!(other instanceof datetime.date)) {
-                    return py.NotImplemented;
-                }
-                // TODO: test this whole mess
-                var year = asJS(this.ops.year) || asJS(other.year);
-                if (asJS(this.ops.years)) {
-                    year -= asJS(this.ops.years);
-                }
-
-                var month = asJS(this.ops.month) || asJS(other.month);
-                if (asJS(this.ops.months)) {
-                    month -= asJS(this.ops.months);
-                    // FIXME: no divmod in JS?
-                    while (month < 1) {
-                        year -= 1;
-                        month += 12;
-                    }
-                    while (month > 12) {
-                        year += 1;
-                        month -= 12;
-                    }
-                }
-
-                var lastMonthDay = new Date(year, month, 0).getDate();
-                var day = asJS(this.ops.day) || asJS(other.day);
-                if (day > lastMonthDay) { day = lastMonthDay; }
-                var days_offset = ((asJS(this.ops.weeks) || 0) * 7) + (asJS(this.ops.days) || 0);
-                if (days_offset) {
-                    day = new Date(year, month-1, day - days_offset).getDate();
-                }
-                // TODO: leapdays?
-                // TODO: hours, minutes, seconds? Not used in XML domains
-                // TODO: weekday?
-                return new datetime.date(year, month, day);
-            },
-            __rsub__: function (other) {
-                return this.__sub__(other);
-            }
-        });
-
-        return {
-            uid: new py.float(this.uid),
-            datetime: datetime,
-            time: time,
-            relativedelta: relativedelta,
-            current_date: date.today.__call__().strftime(['%Y-%m-%d'])
-        };
-    },
     /**
      * FIXME: Huge testing hack, especially the evaluation context, rewrite + test for real before switching
      */
@@ -1154,8 +1006,8 @@ instance.web.JsonRPC = instance.web.CallbackEnabled.extend({
             '</ul>';
         try {
             // see Session.eval_context in Python
-            var ctx = this.test_eval_contexts(
-                ([this.context] || []).concat(source.contexts));
+            var ctx = instance.web.pyeval.eval('contexts',
+                    ([this.context] || []).concat(source.contexts));
             if (!_.isEqual(ctx, expected.context)) {
                 instance.webclient.notification.warn('Context mismatch, report to xmo',
                     _.str.sprintf(match_template, {
@@ -1173,7 +1025,7 @@ instance.web.JsonRPC = instance.web.CallbackEnabled.extend({
         }
 
         try {
-            var dom = this.test_eval_domains(source.domains, this.test_eval_get_context());
+            var dom = instance.web.pyeval.eval('domains', source.domains);
             if (!_.isEqual(dom, expected.domain)) {
                 instance.webclient.notification.warn('Domains mismatch, report to xmo',
                     _.str.sprintf(match_template, {
@@ -1191,7 +1043,7 @@ instance.web.JsonRPC = instance.web.CallbackEnabled.extend({
         }
 
         try {
-            var groups = this.test_eval_groupby(source.group_by_seq);
+            var groups = instance.web.pyeval.eval('groupbys', source.group_by_seq);
             if (!_.isEqual(groups, expected.group_by)) {
                 instance.webclient.notification.warn('GroupBy mismatch, report to xmo',
                     _.str.sprintf(match_template, {
@@ -1208,79 +1060,6 @@ instance.web.JsonRPC = instance.web.CallbackEnabled.extend({
                 }), true);
         }
     },
-    test_eval_contexts: function (contexts, evaluation_context) {
-        evaluation_context = evaluation_context || {};
-        var self = this;
-        return _(contexts).reduce(function (result_context, ctx) {
-            // __eval_context evaluations can lead to some of `contexts`'s
-            // values being null, skip them as well as empty contexts
-            if (_.isEmpty(ctx)) { return result_context; }
-            var evaluated = ctx;
-            switch(ctx.__ref) {
-            case 'context':
-                evaluated = py.eval(ctx.__debug, evaluation_context);
-                break;
-            case 'compound_context':
-                var eval_context = self.test_eval_contexts([ctx.__eval_context]);
-                evaluated = self.test_eval_contexts(
-                    ctx.__contexts, _.extend({}, evaluation_context, eval_context));
-                break;
-            }
-            // add newly evaluated context to evaluation context for following
-            // siblings
-            _.extend(evaluation_context, evaluated);
-            return _.extend(result_context, evaluated);
-        }, _.extend({}, this.user_context));
-    },
-    test_eval_domains: function (domains, evaluation_context) {
-        var result_domain = [], self = this;
-        _(domains).each(function (dom) {
-            switch(dom.__ref) {
-            case 'domain':
-                result_domain.push.apply(
-                    result_domain, py.eval(dom.__debug, evaluation_context));
-                break;
-            case 'compound_domain':
-                var eval_context = self.test_eval_contexts([dom.__eval_context]);
-                result_domain.push.apply(
-                    result_domain, self.test_eval_domains(
-                        dom.__domains, _.extend(
-                            {}, evaluation_context, eval_context)));
-                break;
-            default:
-                result_domain.push.apply(
-                    result_domain, dom);
-            }
-        });
-        return result_domain;
-    },
-    test_eval_groupby: function (contexts) {
-        var result_group = [], self = this;
-        _(contexts).each(function (ctx) {
-            var group;
-            switch(ctx.__ref) {
-            case 'context':
-                group = py.eval(ctx.__debug).group_by;
-                break;
-            case 'compound_context':
-                group = self.test_eval_contexts(
-                    ctx.__contexts, ctx.__eval_context).group_by;
-                break;
-            default:
-                group = ctx.group_by
-            }
-            if (!group) { return; }
-            if (typeof group === 'string') {
-                result_group.push(group);
-            } else if (group instanceof Array) {
-                result_group.push.apply(result_group, group);
-            } else {
-                throw new Error('Got invalid groupby {{'
-                        + JSON.stringify(group) + '}}');
-            }
-        });
-        return result_group;
-    },
     /**
      * Executes an RPC call, registering the provided callbacks.
      *
diff --git a/addons/web/static/src/js/pyeval.js b/addons/web/static/src/js/pyeval.js
new file mode 100644
index 00000000000..8c498c3f885
--- /dev/null
+++ b/addons/web/static/src/js/pyeval.js
@@ -0,0 +1,244 @@
+/*
+ * py.js helpers and setup
+ */
+openerp.web.pyeval = function (instance) {
+    instance.web.pyeval = {};
+
+    var asJS = function (arg) {
+        if (arg instanceof py.object) {
+            return arg.toJSON();
+        }
+        return arg;
+    };
+
+    var datetime = new py.object();
+    datetime.datetime = new py.type(function datetime() {
+        throw new Error('datetime.datetime not implemented');
+    });
+    var date = datetime.date = new py.type(function date(y, m, d) {
+        if (y instanceof Array) {
+            d = y[2];
+            m = y[1];
+            y = y[0];
+        }
+        this.year = asJS(y);
+        this.month = asJS(m);
+        this.day = asJS(d);
+    }, py.object, {
+        strftime: function (args) {
+            var f = asJS(args[0]), self = this;
+            return new py.str(f.replace(/%([A-Za-z])/g, function (m, c) {
+                switch (c) {
+                case 'Y': return self.year;
+                case 'm': return _.str.sprintf('%02d', self.month);
+                case 'd': return _.str.sprintf('%02d', self.day);
+                }
+                throw new Error('ValueError: No known conversion for ' + m);
+            }));
+        }
+    });
+    date.__getattribute__ = function (name) {
+        if (name === 'today') {
+            return date.today;
+        }
+        throw new Error("AttributeError: object 'date' has no attribute '" + name +"'");
+    };
+    date.today = new py.def(function () {
+        var d = new Date();
+        return new date(d.getUTCFullYear(), d.getUTCMonth() + 1, d.getUTCDate());
+    });
+    datetime.time = new py.type(function time() {
+        throw new Error('datetime.time not implemented');
+    });
+
+    var time = new py.object();
+    time.strftime = new py.def(function (args) {
+        return date.today.__call__().strftime(args);
+    });
+
+    var relativedelta = new py.type(function relativedelta(args, kwargs) {
+        if (!_.isEmpty(args)) {
+            throw new Error('Extraction of relative deltas from existing datetimes not supported');
+        }
+        this.ops = kwargs;
+    }, py.object, {
+        __add__: function (other) {
+            if (!(other instanceof datetime.date)) {
+                return py.NotImplemented;
+            }
+            // TODO: test this whole mess
+            var year = asJS(this.ops.year) || asJS(other.year);
+            if (asJS(this.ops.years)) {
+                year += asJS(this.ops.years);
+            }
+
+            var month = asJS(this.ops.month) || asJS(other.month);
+            if (asJS(this.ops.months)) {
+                month += asJS(this.ops.months);
+                // FIXME: no divmod in JS?
+                while (month < 1) {
+                    year -= 1;
+                    month += 12;
+                }
+                while (month > 12) {
+                    year += 1;
+                    month -= 12;
+                }
+            }
+
+            var lastMonthDay = new Date(year, month, 0).getDate();
+            var day = asJS(this.ops.day) || asJS(other.day);
+            if (day > lastMonthDay) { day = lastMonthDay; }
+            var days_offset = ((asJS(this.ops.weeks) || 0) * 7) + (asJS(this.ops.days) || 0);
+            if (days_offset) {
+                day = new Date(year, month-1, day + days_offset).getDate();
+            }
+            // TODO: leapdays?
+            // TODO: hours, minutes, seconds? Not used in XML domains
+            // TODO: weekday?
+            return new datetime.date(year, month, day);
+        },
+        __radd__: function (other) {
+            return this.__add__(other);
+        },
+
+        __sub__: function (other) {
+            if (!(other instanceof datetime.date)) {
+                return py.NotImplemented;
+            }
+            // TODO: test this whole mess
+            var year = asJS(this.ops.year) || asJS(other.year);
+            if (asJS(this.ops.years)) {
+                year -= asJS(this.ops.years);
+            }
+
+            var month = asJS(this.ops.month) || asJS(other.month);
+            if (asJS(this.ops.months)) {
+                month -= asJS(this.ops.months);
+                // FIXME: no divmod in JS?
+                while (month < 1) {
+                    year -= 1;
+                    month += 12;
+                }
+                while (month > 12) {
+                    year += 1;
+                    month -= 12;
+                }
+            }
+
+            var lastMonthDay = new Date(year, month, 0).getDate();
+            var day = asJS(this.ops.day) || asJS(other.day);
+            if (day > lastMonthDay) { day = lastMonthDay; }
+            var days_offset = ((asJS(this.ops.weeks) || 0) * 7) + (asJS(this.ops.days) || 0);
+            if (days_offset) {
+                day = new Date(year, month-1, day - days_offset).getDate();
+            }
+            // TODO: leapdays?
+            // TODO: hours, minutes, seconds? Not used in XML domains
+            // TODO: weekday?
+            return new datetime.date(year, month, day);
+        },
+        __rsub__: function (other) {
+            return this.__sub__(other);
+        }
+    });
+
+    var eval_contexts = function (contexts, evaluation_context) {
+        evaluation_context = evaluation_context || {};
+        return _(contexts).reduce(function (result_context, ctx) {
+            // __eval_context evaluations can lead to some of `contexts`'s
+            // values being null, skip them as well as empty contexts
+            if (_.isEmpty(ctx)) { return result_context; }
+            var evaluated = ctx;
+            switch(ctx.__ref) {
+            case 'context':
+                evaluated = py.eval(ctx.__debug, evaluation_context);
+                break;
+            case 'compound_context':
+                var eval_context = eval_contexts([ctx.__eval_context]);
+                evaluated = eval_contexts(
+                    ctx.__contexts, _.extend({}, evaluation_context, eval_context));
+                break;
+            }
+            // add newly evaluated context to evaluation context for following
+            // siblings
+            _.extend(evaluation_context, evaluated);
+            return _.extend(result_context, evaluated);
+        }, _.extend({}, instance.connection.user_context));
+    };
+    var eval_domains = function (domains, evaluation_context) {
+        var result_domain = [];
+        _(domains).each(function (domain) {
+            switch(domain.__ref) {
+            case 'domain':
+                result_domain.push.apply(
+                    result_domain, py.eval(domain.__debug, evaluation_context));
+                break;
+            case 'compound_domain':
+                var eval_context = eval_contexts([domain.__eval_context]);
+                result_domain.push.apply(
+                    result_domain, eval_domains(
+                        domain.__domains, _.extend(
+                            {}, evaluation_context, eval_context)));
+                break;
+            default:
+                result_domain.push.apply(result_domain, domain);
+            }
+        });
+        return result_domain;
+    };
+    var eval_groupbys = function (contexts, evaluation_context) {
+        var result_group = [];
+        _(contexts).each(function (ctx) {
+            var group;
+            var evaluated = ctx;
+            switch(ctx.__ref) {
+            case 'context':
+                evaluated = py.eval(ctx.__debug), evaluation_context;
+                break;
+            case 'compound_context':
+                var eval_context = eval_contexts([ctx.__eval_context]);
+                evaluated = eval_contexts(
+                    ctx.__contexts, _.extend({}, evaluation_context, eval_context));
+                break;
+            }
+            group = evaluated.group_by;
+            if (!group) { return; }
+            if (typeof group === 'string') {
+                result_group.push(group);
+            } else if (group instanceof Array) {
+                result_group.push.apply(result_group, group);
+            } else {
+                throw new Error('Got invalid groupby {{'
+                        + JSON.stringify(group) + '}}');
+            }
+            _.extend(evaluation_context, evaluated);
+        });
+        return result_group;
+    };
+
+    instance.web.pyeval.context = function () {
+        return {
+            uid: new py.float(instance.connection.uid),
+            datetime: datetime,
+            time: time,
+            relativedelta: relativedelta,
+            current_date: date.today.__call__().strftime(['%Y-%m-%d']),
+        };
+    };
+
+    /**
+     * @param {String} type "domains", "contexts" or "groupbys"
+     * @param {Array} object domains or contexts to evaluate
+     * @param {Object} [context] evaluation context
+     */
+    instance.web.pyeval.eval = function (type, object, context) {
+        if (!context) { context = instance.web.pyeval.context()}
+        switch(type) {
+        case 'contexts': return eval_contexts(object, context);
+        case 'domains': return eval_domains(object, context);
+        case 'groupbys': return eval_groupbys(object, context);
+        }
+        throw new Error("Unknow evaluation type " + type)
+    };
+};
diff --git a/addons/web/static/test/evals.js b/addons/web/static/test/evals.js
index 7bc6554e074..ee4aef4bf79 100644
--- a/addons/web/static/test/evals.js
+++ b/addons/web/static/test/evals.js
@@ -3,16 +3,14 @@ $(document).ready(function () {
 
     module("eval.contexts", {
         setup: function () {
-            openerp = window.openerp.init([]);
-            window.openerp.web.corelib(openerp);
-            window.openerp.web.coresetup(openerp);
+            openerp = window.openerp.testing.instanceFor('coresetup');
         }
     });
     test('context_sequences', function () {
         // Context n should have base evaluation context + all of contexts
         // 0..n-1 in its own evaluation context
         var active_id = 4;
-        var result = openerp.connection.test_eval_contexts([
+        var result = openerp.web.pyeval.eval('contexts', [
             {
                 "__contexts": [
                     {
@@ -56,7 +54,7 @@ $(document).ready(function () {
         });
     });
     test('non-literal_eval_contexts', function () {
-        var result = openerp.connection.test_eval_contexts([{
+        var result = openerp.web.pyeval.eval('contexts', [{
             "__ref": "compound_context",
             "__contexts": [
                 {"__ref": "context", "__debug": "{'type':parent.type}",
@@ -141,9 +139,8 @@ $(document).ready(function () {
     });
     test('current_date', function () {
         var current_date = openerp.web.date_to_str(new Date());
-        var result = openerp.connection.test_eval_domains(
-            [[],{"__ref":"domain","__debug":"[('name','>=',current_date),('name','<=',current_date)]","__id":"5dedcfc96648"}],
-            openerp.connection.test_eval_get_context());
+        var result = openerp.web.pyeval.eval('domains',
+            [[],{"__ref":"domain","__debug":"[('name','>=',current_date),('name','<=',current_date)]","__id":"5dedcfc96648"}]);
         deepEqual(result, [
             ['name', '>=', current_date],
             ['name', '<=', current_date]
diff --git a/addons/web/static/test/test.html b/addons/web/static/test/test.html
index 35d57d3c3a6..91b45c44bad 100644
--- a/addons/web/static/test/test.html
+++ b/addons/web/static/test/test.html
@@ -28,6 +28,7 @@
     <script src="/web/static/lib/py.js/lib/py.js"></script>
 
     <script src="/web/static/src/js/boot.js"></script>
+    <script src="/web/static/src/js/pyeval.js"></script>
     <script src="/web/static/src/js/corelib.js"></script>
     <script src="/web/static/src/js/coresetup.js"></script>
     <script src="/web/static/src/js/dates.js"></script>
diff --git a/addons/web/static/test/testing.js b/addons/web/static/test/testing.js
index e9525fc82a0..9a449a40493 100644
--- a/addons/web/static/test/testing.js
+++ b/addons/web/static/test/testing.js
@@ -6,7 +6,8 @@ openerp.testing = (function () {
     var doc = xhr.responseXML;
 
     var dependencies = {
-        corelib: [],
+        pyeval: [],
+        corelib: ['pyeval'],
         coresetup: ['corelib'],
         data: ['corelib', 'coresetup'],
         dates: [],