Skip to main content

Control Flow and Error Handling

Control flow and error handling are essential for building robust and intelligent Robot Framework test suites. They allow tests to make decisions, repeat actions, and handle failures gracefully.

Conditional Execution (IF / ELSE)​

Robot Framework (4+) supports native IF/ELSE syntax.

IF    ${status} == 'PASS'
    Log    Test Passed
ELSE
    Log    Test Failed
END

Used for:

  • Conditional validations
  • Environment-specific behavior

FOR Loops​

Used to repeat steps.

FOR    ${item}    IN    @{ITEMS}
    Log    ${item}
END

Common use cases:

  • Data-driven steps
  • Repetitive validations

WHILE Loops​

Used when iteration count is not fixed.

WHILE    ${retry} < 3
    Run Keyword And Ignore Error    Some Keyword
    ${retry}    Set Variable    ${retry + 1}
END

Use carefully to avoid infinite loops.

Run Keyword Variations​

Run Keyword If​

Executes keyword conditionally.

Run Keywords​

Executes multiple keywords sequentially.

Run Keyword And Continue On Failure​

Allows execution to continue even after failure.

Run Keyword And Ignore Error​

Captures failure without stopping execution.

TRY / EXCEPT / FINALLY​

Robot Framework supports structured error handling.

TRY
    Some Keyword
EXCEPT
    Log    Error occurred
FINALLY
    Cleanup Keyword
END

Used for:

  • Graceful recovery
  • Cleanup actions
  • Controlled failures

Failure Handling Strategies​

  • Fail fast for critical errors
  • Continue on failure for validations
  • Log meaningful messages
  • Avoid hiding real defects

Common Mistakes ❌​

  • Overusing Continue On Failure
  • Ignoring errors blindly
  • Complex logic inside test cases
  • Infinite loops

Best Practices ✅​

  • Keep logic inside keywords
  • Use TRY/EXCEPT sparingly
  • Log failures clearly
  • Design for readability

Key Takeaways​

  • Control flow enables intelligent tests
  • Error handling improves stability
  • Robot supports modern constructs
  • Clean design prevents flaky tests