[IMP] web: tests: patch _.debounce and _.throttle

... to allow them to be called several times without having to
wait for the delays.

This was already done for _.throttle, by default for the whole
test suite, and it couldn't be parameterized in individual tests.
This was enough for _.throttle, but the same solution couldn't be
applied for _.debounce, because some tests actually test that some
handlers are correctly debounced.

Those function are now patched in addMockEnvironment, and two
parameters can be set: 'debounce' (default: true) and 'throttle'
(default: false).

addons/web/static/tests/helpers/qunit_config.js

@@ -40,17 +40,6 @@ QUnit.config.hidepassed = (window.location.href.match(/[?&]testId=/) === null);
 
 var sortButtonAppended = false;
 
-/**
- * We override the _.throttle function to avoid the delay in order to be able to
- * chain multiple actions using throttle in the same test.
- */
-QUnit.begin(function () {
-    this._initialThrottle = _.throttle;
-    var self = this;
-    _.throttle = function (func, wait, options) {
-        return self._initialThrottle(func, 0, options);
-    };
-});
 /**
  * This is the way the testing framework knows that tests passed or failed. It
  * only look in the phantomJS console and check if there is a ok or an error.
@@ -67,7 +56,6 @@ QUnit.done(function(result) {
     if (!sortButtonAppended) {
         _addSortButton();
     }
-    _.throttle = this._initialThrottle;
 });
 
 /**

addons/web/static/tests/helpers/test_utils.js

@@ -228,6 +228,11 @@ function createAsyncView(params) {
  *   up in the init process of the view, because there are no other way to do it
  *   after this method returns. Some events ('call_service', "load_views",
  *   "get_session", "load_filters") have a special treatment beforehand.
+ * @param {boolean} [debounce=true] set to false to completely remove the
+ *   debouncing, forcing the handler to be called directly (not on the next
+ *   execution stack, like it does with delay=0).
+ * @param {boolean} [throttle=false] set to true to keep the throttling, which
+ *   is completely removed by default.
  *
  * @returns {MockServer} the instance of the mock server, created by this
  *   function. It is necessary for createAsyncView so that method can call some
@@ -250,9 +255,9 @@ function addMockEnvironment(widget, params) {
         debug: params.debug,
     });
     // make sure the debounce value for input fields is set to 0
-    var initialDebounce = DebouncedField.prototype.DEBOUNCE;
+    var initialDebounceValue = DebouncedField.prototype.DEBOUNCE;
     DebouncedField.prototype.DEBOUNCE = params.fieldDebounce || 0;
-    var initialSession, initialConfig, initialParameters;
+    var initialSession, initialConfig, initialParameters, initialDebounce, initialThrottle;
     initialSession = _.extend({}, session);
     session.getTZOffset = function () {
         return 0; // by default, but may be overriden in specific tests
@@ -274,6 +279,18 @@ function addMockEnvironment(widget, params) {
         initialParameters = _.extend({}, core._t.database.parameters);
         _.extend(core._t.database.parameters, params.translateParameters);
     }
+    if (params.debounce === false) {
+        initialDebounce = _.debounce;
+        _.debounce = function (func) {
+            return func;
+        };
+    }
+    if (!('throttle' in params) || !params.throttle) {
+        initialThrottle = _.throttle;
+        _.throttle = function (func) {
+            return func;
+        };
+    }
 
     var widgetDestroy = widget.destroy;
     widget.destroy = function () {
@@ -281,7 +298,13 @@ function addMockEnvironment(widget, params) {
         // widget is destroyed, at the end of each test to avoid collisions
         core.bus.trigger('clear_cache');
 
-        DebouncedField.prototype.DEBOUNCE = initialDebounce;
+        DebouncedField.prototype.DEBOUNCE = initialDebounceValue;
+        if (params.debounce === false) {
+            _.debounce = initialDebounce;
+        }
+        if (!('throttle' in params) || !params.throttle) {
+            _.throttle = initialThrottle;
+        }
 
         var key;
         if ('session' in params) {