How to write a loop while in Robot Framework - automated-tests

Question

I make my first simple test case, and I have one problem.
Is it possible write a loop in Robot Framework?
I want to retrieve the value from the address and the address of the modified variable "i". I want to perform until such an address exists, because it is a row in the table.
${f1} A
${f_temp} B
While ${f1} != ${f_temp}
or
While element xpath=//${i} is visible
\ ${F_temp} Get Text xpath=//${i}
\ ${i} ${i}+1
\ Run Keyword And Continue On Failure Should be equal ${f_temp} ${f1}
Any ideas?

Answer 1

I'm updating my answer because modern Robot Framework does have a while loop.
The old answer, do not use this:
Robot Framework does not have a while loop. You must use the FOR-loop and "exit for loop if" keywords to exit. It will run in a finite time, but if you select a large enough number in range, it is close enough for practical purposes.
*** Test Cases ***
For Test
FOR ${i} IN RANGE 999999
Exit For Loop If ${i} == 9
Log ${i}
END
Log Exited

Answer 2

You might be looking for the Wait Until Keyword Succeeds keyword, which enables you to do a similar construction to a while loop. It is much more readable than FOR cycles with conditional exiting.
You then use your custom keyword, which fails when you need to end the "loop".

Answer 3

This are other kinds of FOR Loops in Robot Framework, I have this on my own notes and its very helpfull.
FOR Loop with Upper Bounds Range
[Documentation] This gives us a 0 based range
FOR ${Index} IN RANGE 5
Do Something ${Index}
${RANDOM_STRING} = Generate Random String ${Index}
Log ${RANDOM_STRING}
END
FOR Loop with Start and Finish Range
[Documentation] No longer a 0 based range because I provided start
FOR ${Index} IN RANGE 1 4
Do Something ${Index}
${RANDOM_STRING} = Generate Random String ${Index}
Log ${RANDOM_STRING}
END
FOR Loop with Start, Finish, and Step Range
[Documentation] The counter will jump by 2 each time ("step" value = 2)
FOR ${Index} IN RANGE 1 10 2
Do Something ${Index}
${RANDOM_STRING} = Generate Random String ${Index}
Log ${RANDOM_STRING}
END
#index for elements in for
${index} = Set Variable 0
FOR ${col} IN #{cols}
${colum} Format String css:div[class='v-widget v-has-caption v-caption-on-top'] table[aria-rowcount='{0}'] tbody tr:nth-of-type({1}) td:nth-of-type(10) ${r_count} ${col}
Click element ${colum}
press Keys none ${net_config.broadcast}
Press Keys none TAB
Press Keys none ${net_config.${index}}
${index}= Evaluate ${index} + 1
END
#-------
FOR Loop with List
#{ITEMS} = Create List Item 1 Item 2 Item 3
FOR ${MyItem} IN #{ITEMS}
Log ${MyItem}
END
Exit a FOR Loop
#{ITEMS} = Create List Item 1 Item 2 Item 3 Item 4
FOR ${MyItem} IN #{ITEMS}
Log ${MyItem}
Run Keyword If "${MyItem}" == "Item 3" Exit For Loop
Log Didn't exit yet
END
Log Now we're out of the loop

Answer 4

As the above answer said, Robot doesn't support native WHILE loop.
But this one may help if you insist.
https://github.com/robotframework/robotframework/issues/3235