fix: Series.Add-Comment.Validation.Add a blank comment: StaleElementReferenceException: Message: stale element reference: stale element not found in the current frame

Author: php-coder

src/test/robotframework/selenium.utils.robot

@@ -50,6 +50,17 @@ Wait Until Element Value Is
 	...                 ';
 	Wait For Condition  ${elemHasValue}
 
+Wait Until Element Text Is
+	[Documentation]     Hybrid of "Wait Until Page Contains Element" and "Element Text Should Be" keywords
+	[Arguments]         ${id}  ${text}
+	${elemHasText}=     Catenate  SEPARATOR=
+	...                 var el = window.document.getElementById('
+	...                 ${id}
+	...                 '); return el != null && el.innerText == '
+	...                 ${text}
+	...                 ';
+	Wait For Condition  ${elemHasText}
+
 Select Random Option From List
 	[Documentation]            Choose a random option from a select element
 	[Arguments]                ${locator}

src/test/robotframework/series/add-comment/validation.robot

@@ -9,23 +9,20 @@ Force Tags      series  add-comment  validation
 
 *** Test Cases ***
 Add comment with empty required field
-	[Setup]                           Disable Client Validation  add-comment-form
-	Submit Form                       id:add-comment-form
-	Wait Until Page Contains Element  id:new-comment.errors
-	Element Text Should Be            id:new-comment.errors  Value must not be empty
+	[Setup]                     Disable Client Validation  add-comment-form
+	Submit Form                 id:add-comment-form
+	Wait Until Element Text Is  new-comment.errors  Value must not be empty
 
 Add a blank comment
-	Input Text                        id:new-comment  ${SPACE}${SPACE}
-	Submit Form                       id:add-comment-form
-	Wait Until Page Contains Element  id:new-comment.errors
-	Element Text Should Be            id:new-comment.errors  Value must not be empty
+	Input Text                  id:new-comment  ${SPACE}${SPACE}
+	Submit Form                 id:add-comment-form
+	Wait Until Element Text Is  new-comment.errors  Value must not be empty
 
 Add too long comment
-	${letter}=                        Set Variable  x
-	Input Text                        id:new-comment  ${letter * 1025}
-	Submit Form                       id:add-comment-form
-	Wait Until Page Contains Element  id:new-comment.errors
-	Element Text Should Be            id:new-comment.errors  Value is greater than allowable maximum of 1024 characters
+	${letter}=                  Set Variable  x
+	Input Text                  id:new-comment  ${letter * 1025}
+	Submit Form                 id:add-comment-form
+	Wait Until Element Text Is  new-comment.errors  Value is greater than allowable maximum of 1024 characters
 
 *** Keywords ***
 Before Test Suite