added Tester.assertTextDoesntExist()

@@ -10,6 +10,7 @@ XXXX-XX-XX, v1.0.0
 - fixed [#215](https://github.com/n1k0/casperjs/issues/215) - added a `--fail-fast` option to the `casper test` command, in order to terminate a test suite execution as soon as any failure is encountered
 - fixed [#274](https://github.com/n1k0/casperjs/issues/274) - some headers couldn't be set
 - fixed [#277](https://github.com/n1k0/casperjs/issues/277) - multiline support in `ClientUtils.echo()`
+- added [`Tester.assertTextDoesntExist()`](http://casperjs.org/api.html#tester.assertTextDoesntExist)
 - added `Tester.assertFalse()` as an alias of `Tester.assertNot()`
 - added `page.resource.requested` and `page.resource.received` events
 

-Subproject commit 2ad38f2ba8e89d6de6494bcfeed2dc76f256e283
+Subproject commit efdaeb9e092054de1b30fa093ec2cd2435a2d894

@@ -422,6 +422,27 @@ Tester.prototype.assertResourceExists = Tester.prototype.assertResourceExist = f
 };
 
 /**
+ * Asserts that given text doesn't exist in the document body.
+ *
+ * @param  String  text     Text not to be found
+ * @param  String  message  Test description
+ * @return Object           An assertion result object
+ */
+Tester.prototype.assertTextDoesntExist = Tester.prototype.assertTextDoesntExist = function assertTextDoesntExist(text, message) {
+    "use strict";
+    var textFound = (this.casper.evaluate(function _evaluate() {
+        return document.body.textContent || document.body.innerText;
+    }).indexOf(text) === -1);
+    return this.assert(textFound, message, {
+        type: "assertTextDoesntExists",
+        standard: "Text doesn't exist within the document body",
+        values: {
+            text: text
+        }
+    });
+};
+
+/**
  * Asserts that given text exists in the document body.
  *
  * @param  String  text     Text to be found
@@ -450,11 +471,11 @@ Tester.prototype.assertTextExists = Tester.prototype.assertTextExist = function
  * @param  String   message   Test description
  * @return Object             An assertion result object
  */
-Tester.prototype.assertSelectorHasText = function assertSelectorHasText(selector, text, message) {
+Tester.prototype.assertSelectorHasText = Tester.prototype.assertSelectorContains = function assertSelectorHasText(selector, text, message) {
     "use strict";
     var textFound = this.casper.fetchText(selector).indexOf(text) !== -1;
     return this.assert(textFound, message, {
-        type: "assertTextInSelector",
+        type: "assertSelectorHasText",
         standard: f('Found "%s" within the selector "%s"', text, selector),
         values: {
             selector: selector,
@@ -471,11 +492,11 @@ Tester.prototype.assertSelectorHasText = function assertSelectorHasText(selector
  * @param  String   message   Test description
  * @return Object             An assertion result object
  */
-Tester.prototype.assertSelectorDoesntHaveText = function assertSelectorDoesntHaveText(selector, text, message) {
+Tester.prototype.assertSelectorDoesntHaveText = Tester.prototype.assertSelectorDoesntContain = function assertSelectorDoesntHaveText(selector, text, message) {
     "use strict";
     var textFound = this.casper.fetchText(selector).indexOf(text) === -1;
     return this.assert(textFound, message, {
-        type: "assertNoTextInSelector",
+        type: "assertSelectorDoesntHaveText",
         standard: f('Did not find "%s" within the selector "%s"', text, selector),
         values: {
             selector: selector,

@@ -28,6 +28,9 @@ casper.thenOpen('tests/site/index.html', function() {
     t.comment('Tester.assertTextExist()');
     t.assertTextExist('form', 'Tester.assertTextExist() checks that page body contains text [alias]');
 
+    t.comment('Tester.assertTextDoesntExist()');
+    t.assertTextDoesntExist('blah', "Tester.assertTextDoesntExist() checks that page body doesn't contain provided text");
+
     t.comment('Tester.assertSelectorHasText()');
     t.assertSelectorHasText('h1', 'Title', 'Tester.assertSelectorHasText() works as expected');