Remove "content" locator from acceptance tests

The "content" locator uses the "named" Mink selector and the "content"
Mink locator to find the element. The "named" Mink first tries to find
the elements whose content match exactly the given content but, if none
is found, then it tries to find elements that just contain the given
content.

This behaviour can lead to hard to track issues. Finding the exact match
and, if not found, finding the partial match is done in quick
succession. In most cases, when looking for an exact match the element
is already there, it is returned, and everything works as expected. Or
it may not be there, but then it is not there either when finding the
partial match, so no element is returned, and everything works as
expected (that is, the actor tries to find again the element after some
time).

However, it can also happen that when looking for an exact match there
is no element yet, but it appears after trying to find the exact match
but before trying to find the partial match. In that situation the
desired element would be returned along with its ancestors. However, as
only the first found element is taken into account and the ancestors
would appear first the find action would be successful, but the returned
element would not be the expected one. This is highly unlikely, yet
possible, and can cause sporadic failures in acceptance tests that,
apparently, work as expected.

Using a "named_exact" Mink selector instead of the "named" Mink selector
does not provide the desired behaviour in most cases either. As it finds
any element whose content matches exactly the given content, looking for
"Hello world" in "<div><p><a>Hello world</a></p></div>" would match the
"div", "p" and "a" elements; in that situation the "div" element would
be the one returned, when typically the "a" element would be the
expected one.

As it is error prone and easily replaceable by more robust locators the
"content" locator was removed from the predefined ones (although it can
still be used if needed through the "customSelector" method in the
builder object).

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

tests/acceptance/features/bootstrap/FilesAppContext.php

@@ -106,7 +106,11 @@ class FilesAppContext implements Context, ActorAwareInterface {
 	 * @return Locator
 	 */
 	public static function shareLinkCheckbox() {
-		return Locator::forThe()->content("Share link")->descendantOf(self::currentSectionDetailsView())->
+		// forThe()->checkbox("Share link") can not be used here; that would
+		// return the checkbox itself, but the element that the user interacts
+		// with is the label.
+		return Locator::forThe()->xpath("//label[normalize-space() = 'Share link']")->
+				descendantOf(self::currentSectionDetailsView())->
 				describedAs("Share link checkbox in the details view in Files app");
 	}
 
@@ -122,7 +126,11 @@ class FilesAppContext implements Context, ActorAwareInterface {
 	 * @return Locator
 	 */
 	public static function passwordProtectCheckbox() {
-		return Locator::forThe()->content("Password protect")->descendantOf(self::currentSectionDetailsView())->
+		// forThe()->checkbox("Password protect") can not be used here; that
+		// would return the checkbox itself, but the element that the user
+		// interacts with is the label.
+		return Locator::forThe()->xpath("//label[normalize-space() = 'Password protect']")->
+				descendantOf(self::currentSectionDetailsView())->
 				describedAs("Password protect checkbox in the details view in Files app");
 	}
 
@@ -163,7 +171,7 @@ class FilesAppContext implements Context, ActorAwareInterface {
 	 * @return Locator
 	 */
 	public static function favoritedStateIconForFile($fileName) {
-		return Locator::forThe()->content("Favorited")->descendantOf(self::favoriteActionForFile($fileName))->
+		return Locator::forThe()->css(".icon-starred")->descendantOf(self::favoriteActionForFile($fileName))->
 				describedAs("Favorited state icon for file $fileName in Files app");
 	}
 
@@ -210,7 +218,8 @@ class FilesAppContext implements Context, ActorAwareInterface {
 	 * @return Locator
 	 */
 	private static function fileActionsMenuItemFor($itemText) {
-		return Locator::forThe()->content($itemText)->descendantOf(self::fileActionsMenu())->
+		return Locator::forThe()->xpath("//a[normalize-space() = '$itemText']")->
+				descendantOf(self::fileActionsMenu())->
 				describedAs($itemText . " item in file actions menu in Files app");
 	}
 

tests/acceptance/features/bootstrap/FilesSharingAppContext.php

@@ -47,7 +47,7 @@ class FilesSharingAppContext implements Context, ActorAwareInterface {
 	 * @return Locator
 	 */
 	public static function wrongPasswordMessage() {
-		return Locator::forThe()->content("The password is wrong. Try again.")->
+		return Locator::forThe()->xpath("//*[@class = 'warning' and normalize-space() = 'The password is wrong. Try again.']")->
 				describedAs("Wrong password message in Authenticate page");
 	}
 

tests/acceptance/features/bootstrap/LoginPageContext.php

@@ -66,7 +66,7 @@ class LoginPageContext implements Context, ActorAwareInterface {
 	 * @return Locator
 	 */
 	public static function wrongPasswordMessage() {
-		return Locator::forThe()->content("Wrong password. Reset it?")->
+		return Locator::forThe()->xpath("//*[@class = 'warning' and normalize-space() = 'Wrong password. Reset it?']")->
 				describedAs("Wrong password message in Login page");
 	}
 

tests/acceptance/features/bootstrap/NotificationContext.php

@@ -31,7 +31,8 @@ class NotificationContext implements Context, ActorAwareInterface {
 	 * @return Locator
 	 */
 	public static function notificationMessage($message) {
-		return Locator::forThe()->content($message)->descendantOf(self::notificationContainer())->
+		return Locator::forThe()->xpath("//*[@class = 'row' and normalize-space() = '$message']")->
+				descendantOf(self::notificationContainer())->
 				describedAs("$message notification");
 	}
 

tests/acceptance/features/bootstrap/SettingsMenuContext.php

@@ -61,7 +61,8 @@ class SettingsMenuContext implements Context, ActorAwareInterface {
 	 * @return Locator
 	 */
 	private static function menuItemFor($itemText) {
-		return Locator::forThe()->content($itemText)->descendantOf(self::settingsMenu())->
+		return Locator::forThe()->xpath("//a[normalize-space() = '$itemText']")->
+				descendantOf(self::settingsMenu())->
 				describedAs($itemText . " item in Settings menu");
 	}
 

tests/acceptance/features/core/Locator.php

@@ -169,14 +169,6 @@ class LocatorBuilder {
 		return $this->customSelector("named", array("link_or_button", $value));
 	}
 
-	/**
-	 * @param string $value
-	 * @return LocatorBuilderSecondStep
-	 */
-	public function content($value) {
-		return $this->customSelector("named", array("content", $value));
-	}
-
 	/**
 	 * @param string $value
 	 * @return LocatorBuilderSecondStep