Test Case While Loop

Robot Framework
1

Is it possible to write a test case where the entire test case is a while loop and the condition of the while loop is

while test.status == failed
Run this test
Generate a test result
end while

2

Hi @CSUThornton,

By default once a test fails it exits, so your while would never be true.

It’s not clear what you are trying to acheive, perhaps if you describe the problem you’re trying to solve here we can suggest some better ways to acheive what you want.

Having said that, if you put Run this test and Generate a test result into a keyword and call it with Wait Until Keyword Succeeds you’d have something similar to what you described. Bearing in mind if any keyword in Run this test fails Generate a test result won’t be run.

Builtin library also has other keywords that might be useful like:

It really depends on what your trying to do as to what the best option is.

Hope that helps,

Dave.

1 Like
5

This is what I’m trying to do:

MUST support NAT6to4 Device
   [Documentation]      Check translations
   [Tags]  00000000001
   BuiltIn.Sleep                     5 seconds
   SSH to host          ${SRVR}   ${USER}    ${PASS}
   WRITE                ping6 -c 20 -s 1500 1:1:1::1 -I ens224
   ${output}                 get_config         ${connection_en}    ${TRANSLATIONS}
   Log                  ${output}
   ${status} =               nat_check        ${6to4NAT_IP1}      ${6to4NAT_IP2}      ${6to4NAT_IP3}      ${6to4NAT_IP4}      ${output}
   Should be Equal           ${status}        ${TRUE}
   IF    ${status} == ${TRUE}
       SET SUITE VARIABLE    ${NAT6to4_result}    1
   END
   WHILE    True    ${NAT6to4_result} = 0
       BuiltIn.Sleep                     5 seconds
       SSH to host          ${SRVR}   ${USER}    ${PASS}
       WRITE                ping6 -c 20 -s 1500 1:1:1::1 -I ens224
       ${output}                 get_config         ${connection_en}    ${TRANSLATIONS}
       Log                  ${output}
       ${status} =               nat_check        ${6to4NAT_IP1}      ${6to4NAT_IP2}      ${6to4NAT_IP3}      ${6to4NAT_IP4}      ${output}
       Should be Equal           ${status}        ${TRUE}
       IF    ${status} == ${TRUE}
           SET SUITE VARIABLE    ${NAT6to4_result}    1
       END
   END
   Log To Console    \n\nIPv6_Dest_result equals: ${NAT6to4_result}
   ${output}                 get_config         ${connection_en}    ${CLEAR_TRANSLATIONS}
   BuiltIn.Sleep                     5 seconds
   ${output} =    Run    sudo route del -net 2.2.2.0 netmask 255.0.0.0
   ${output} =    Run    sudo route -6 del 1:1:1::/64
   ${result1} =    Run    route
   Should Not Contain    ${result1}    2.2.2.0
   ${result2} =    Run    route -6
   Should Not Match Regexp     ${result2}    ${IPV6ROUTE}
   Close SSH
   BuiltIn.Sleep    30 seconds
   Close connection
   BuiltIn.Sleep    30 seconds

The problem is that Robot keeps coming back with:

------------------------------------------------------------------------------
MUST support NAT6to4 Device :: Check translations                     | FAIL |
'While' is a reserved keyword.
------------------------------------------------------------------------------

I’m following the syntax provided in the following link:

[While loops in Robot Framework | Robocorp documentation](I’m following the syntax provided in the following link: While loops in Robot Framework | Robocorp documentation I’m not sure what the issue is.)

I’m not sure what the issue is.

6

Yeah your using the WHILE loop wrong, the second argument is a optional one that is “limit” and by default it has a limit of 10000, the first which happens to be “True” in your test means it will never evaluate to anything else, but this will be where you’d evaluate for it to exit or not, I’d imagine you’d be wanting to check if ${NAT6to4_result} is equal 0 here based on what you’ve provided.

Please be aware an exception will be thrown when using a limit if the condition is never met (limit is met)so you’d want to handle it.

Hope that helps

Thanks

1 Like
7

Sorry in addition and I wouldn’t recommend it, If you really wanted to loop infinitely, you can set the limit argument to NONE, but I’d recommend setting appropriately based on your understanding of the application.

You’d want to wrap in a try catch to capture the exception as well if the limit is met.

1 Like