In RobotFramework, is it possible to run test cases in For-Loop? - for-loop

Question

So my issues might be of syntactic nature, maybe not, but I am clueless on how to proceed next. I am writing a test case on the Robot Framework, and my end goal is to be able to run ,multiple tests, back to back in a Loop.
In this cases below, the Log to Console call works fine, and outputs the different values passed as parameters. The next call "Query Database And Analyse Data" works as well.
*** Test Cases ***
| For-Loop-Elements
| | #{Items} = | Create List | ${120} | ${240} | ${240}
| | :FOR | ${ELEMENT} | IN | #{ITEMS}
| | | Log To Console | Running tests at Voltage: ${ELEMENT}
| | | Query Database And Analyse Data
But then, when I try to makes a test cases with documentation and tags with "Query Database And Analyse Data", I get the Error: Keyword Name cannot be Empty, which leads me to think that when the file gets to [Documentation tag], it doesn't understand that it is part of a test case. This is usually how I write test cases.
Please note here that the indentation tries to match the inside of the loop
*** Test Cases ***
| For-Loop-Elements
| | #{Items} = | Create List | ${120} | ${240} | ${240}
| | :FOR | ${ELEMENT} | IN | #{ITEMS}
| | | Log To Console | Running tests at Voltage: ${ELEMENT}
| | | Query Database And Analyse Data
| | | | [Documentation] | Query DB.
| | | | [Tags] | query | voltagevariation
| | | Duplicates Test
| | | | [Documentation] | Packets should be unique.
| | | | [Tags] | packet_duplicates | system
| | | | Duplicates
| | | Chroma Output ON
| | | | [Documentation] | Setting output terminal status to ON
| | | | [Tags] | set_output_on | voltagevariation
| | | | ${chroma-status} = | Chroma Output On | ${HOST} | ${PORT}
Now is this a syntax problem, indentation issue, or is it just plain impossible to do what I'm trying to do? If you have written similar cases, but in a different manner, please let me know!
Any help or input would be highly appreciated!

Answer 1

You are trying to use Keywords as Test Cases. This approach is not supported by Robot Framework.
What you could do is make one Test Case with a lot of Keywords:
*** Test Cases ***
| For-Loop-Elements
| | #{Items} = | Create List | ${120} | ${240} | ${240}
| | :FOR | ${ELEMENT} | IN | #{ITEMS}
| | | Log To Console | Running tests at Voltage: ${ELEMENT}
| | | Query Database And Analyse Data
| | | Duplicates
| | | ${chroma-status} = | Chroma Output On | ${HOST} | ${PORT}
*** Keywords ***
| Query Database And Analyse Data
| | Do something
| | Do something else
...
You can't really fit [Tags] anywhere useful. You can, however, fire meaningful fail messages (substituting the [Documentation]) if instead of using a Keyword directly you wrapped it in Run Keyword And Return Status.
Furthermore, please have a look at data driven tests to get rid of the :FOR-loop completely.