Add `casper.thenSkip()`, `casper.thenSkipIf()`...

... and `casper.thenSkipUnless()`

@@ -1614,6 +1614,55 @@ Casper.prototype.thenOpen = function thenOpen(location, settings, then) {
 };
 
 /**
+ * Skip `nb` tests.
+ *
+ * @param Integer nb      number of tests to skip
+ * @param String  message message to display
+ */
+Casper.prototype.thenSkip = function (nb, message) {
+    return this.then(function () {
+        this.test.skip(nb, message);
+    });
+};
+
+/**
+ * Skip `nb` tests if condition is true.
+ *
+ * @param Mixed   condition  number of tests to skip
+ * @param Integer nb         number of tests to skip
+ * @param String  message    message to display
+ */
+Casper.prototype.thenSkipIf = function (condition, nb, message) {
+    return this.then(function () {
+        if (utils.isFunction(condition)) {
+            condition = condition();
+        }
+        if (utils.isTruthy(condition)) {
+            this.test.skip(nb, message);
+        }
+    });
+};
+
+/**
+ * Skip `nb` tests if condition is true.
+ *
+ * @param Mixed   condition  number of tests to skip
+ * @param Integer nb         number of tests to skip
+ * @param String  message    message to display
+ */
+Casper.prototype.thenSkipUnless = function (condition, nb, message) {
+    return this.then(function () {
+        if (utils.isFunction(condition)) {
+            condition = condition();
+        }
+        if (utils.isFalsy(condition)) {
+            this.test.skip(nb, message);
+        }
+    });
+};
+
+
+/**
  * Adds a new navigation step for opening and evaluate an expression
  * against the DOM retrieved from the provided location.
  *

@@ -61,3 +61,78 @@ casper.test.begin('Skip does not polluate next suite', 1, function(test) {
     });
 });
 
+casper.test.begin('Casper.thenSkip', 2, function(test) {
+    casper.
+        thenSkip(1).
+        then(function () {
+            test.fail("This test should be skipped.");
+        }).
+        then(function () {
+            test.pass("This test should be executed.");
+        });
+
+    casper.run(function() {
+        test.done();
+    });
+});
+
+casper.test.begin('Casper.thenSkipIf', 5, function(test) {
+    casper.
+        thenSkipIf(true, 1, "Skip if with function").
+        then(function () {
+            test.fail("This test should be skipped.");
+        }).
+        then(function () {
+            test.pass("This test should be executed.");
+        }).
+        thenSkipIf(function () {
+            return true;
+            }, 1, "Skip if with function").
+        then(function () {
+            test.fail("This test should be skipped.");
+        }).
+        then(function () {
+            test.pass("This test should be executed.");
+        }).
+        thenSkipIf(function () {
+            return false;
+            }, 1, "Do not skip if with function").
+        then(function () {
+            test.pass("This test should be executed.");
+        });
+
+    casper.run(function() {
+        test.done();
+    });
+});
+
+casper.test.begin('Casper.thenSkipUnless', 5, function(test) {
+    casper.
+        thenSkipUnless(false, 1, "Skip unless with function").
+        then(function () {
+            test.fail("This test should be skipped.");
+        }).
+        then(function () {
+            test.pass("This test should be executed.");
+        }).
+        thenSkipUnless(function () {
+            return false;
+            }, 1, "Skip unless with function").
+        then(function () {
+            test.fail("This test should be skipped.");
+        }).
+        then(function () {
+            test.pass("This test should be executed.");
+        }).
+        thenSkipUnless(function () {
+            return true;
+            }, 1, "Do not skip unless with function").
+        then(function () {
+            test.pass("This test should be executed.");
+        });
+
+    casper.run(function() {
+        test.done();
+    });
+});
+