Refactor assertations, introduce click(..).

lib/inject/assert.js

@@ -82,25 +82,25 @@ var fail = exports.fail = function fail(actual, expected, message, operator) {
 
 var ok = exports.ok = function ok(value, message) {
   if ( !!! value) {
-    fail(value, true, message, '==', exports.ok);
+    fail(value, true, message, '==');
   }
 };
 
 var equal = exports.equal = function equal(actual, expected, message) {
   if (actual != expected) {
-    fail(actual, expected, message, '==', exports.equal);
+    fail(actual, expected, message, '==');
   }
 };
 
 var notEqual = exports.notEqual = function notEqual(actual, expected, message) {
   if (actual == expected) {
-    fail(actual, expected, message, '!=', exports.notEqual);
+    fail(actual, expected, message, '!=');
   }
 };
 
 var deepEqual = exports.deepEqual = function deepEqual(actual, expected, message) {
   if ( ! _deepEqual(actual, expected)) {
-    fail(actual, expected, message, 'deepEqual', exports.deepEqual);
+    fail(actual, expected, message, 'deepEqual');
   }
 };
 
@@ -167,19 +167,19 @@ var objectEqual = function objectEqual(left, right) {
 
 exports.notDeepEqual = function notDeepEqual(actual, expected, message) {
   if (_deepEqual(actual, expected)) {
-    fail(actual, expected, message, 'notDeepEqual', exports.notDeepEqual);
+    fail(actual, expected, message, 'notDeepEqual');
   }
 };
 
 exports.strictEqual = function strictEqual(actual, expected, message) {
   if (actual !== expected) {
-    fail(actual, expected, message, '===', exports.strictEqual);
+    fail(actual, expected, message, '===');
   }
 };
 
 exports.notStrictEqual = function notStrictEqual(actual, expected, message) {
   if (actual === expected) {
-    fail(actual, expected, message, '!==', exports.notStrictEqual);
+    fail(actual, expected, message, '!==');
   }
 };
 

lib/inject/task_query.js

@@ -6,18 +6,66 @@ function TaskQuery(task, query, message) {
   return this;
 };
 
-TaskQuery.prototype._elements = function TaskQuery_elements(variable) {
-  return (variable || '_elements') + ' = document.querySelectorAll(' + JSON.stringify(this._query) + ')';
+TaskQuery.prototype._evaluate = function TaskQuery_evaluate(name, code) {
+  var result = this._page.evaluate(new Function(code));
+  if (result !== true) {
+    this._task.assert.fail(result, true, this._message, name + '(..)');
+  }
+  return this;
 };
 
 TaskQuery.prototype.first = function TaskQuery_first(block) {
-  var hasElements = this._page.evaluate(new Function(' \
-    var ' + this._elements() + '; \
-    return _elements.length; \
-  '));
-  if ( ! hasElements) {
-    return this._task.assert.fail(hasElements, true, this._message || ('expected at least one element: ' + this._query), this.first);
-  }
+  return this._evaluate('first', '\n\
+    var _query    = ' + JSON.stringify(this._query) + '\n\
+        _elements = document.querySelectorAll(_query);\n\
+    if ( ! _elements.length) {\n\
+      return "expected at least one element: " + _query;\n\
+    }\n\
+    if ((' + block.toString() + ')(_elements[0])) {\n\
+      return true;\n\
+    }\n\
+    return "expression failed on first element: " + _query;\n\
+  ');
+};
+
+TaskQuery.prototype.every = function TaskQuery_first(block) {
+  return this._evaluate('every', '\n\
+    var _query    = ' + JSON.stringify(this._query) + '\n\
+        _elements = document.querySelectorAll(_query);\n\
+    if ( ! _elements.length) {\n\
+      return "expected at least one element: " + _query;\n\
+    }\n\
+    var _result = true,\n\
+        _index  = 0;\n\
+    Array.prototype.slice.call(_elements).forEach(function(_element) {\n\
+      _index = _index + 1;\n\
+      if (_result === true) {\n\
+        if ((' + block.toString() + ')(_element)) {\n\
+          return true;\n\
+        }\n\
+        _result = "expression failed on element " + _index + ": " + _query;\n\
+      }\n\
+    });\n\
+    return _result;\n\
+  ');
+};
+
+TaskQuery.prototype.click = function TaskQuery_click(index) {
+  index || (index = 0);
+  return this._evaluate('click', '\n\
+    var _query    = ' + JSON.stringify(this._query) + '\n\
+        _elements = document.querySelectorAll(_query);\n\
+    if ( ! _elements.length) {\n\
+      return "expected at least one element: " + _query;\n\
+    }\n\
+    if ( ! _elements[' + index + ']) {\n\
+      return "no element at index ' + index + ': " + _query;\n\
+    }\n\
+    var _event = document.createEvent("MouseEvents");\n\
+    _event.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);\n\
+    _elements[' + index + '].dispatchEvent(_event);\n\
+    return true;\n\
+  ');
 };
 
 exports = TaskQuery;

lib/inject/test_page.js

@@ -66,6 +66,7 @@ TestPage.prototype._complete = function TestPage_complete(child, status, message
   if (child._status === STATUS_FAIL) {
     this._skip = true;
     _failed    = true;
+    // TODO: throw exception to stop further processing of group
   }
   var remaining = 0;
   this.top._descend(function() {