rfdb 2.0

A powerful interactive debugger for Robot Framework

rfdb - Robot Framework Debugger

A powerful interactive debugger for Robot Framework with real-time test control, variable inspection, and keyword retry capabilities.

🚀 Features

• ⏸️ Pause & Continue: Stop test execution at any failure and resume when ready
• 🔄 Retry Keywords: Retry failed keywords with modified arguments
• 🔍 Variable Inspector: View all variables in real-time (test/suite/global scope)
• ⚡ Run Custom Keywords: Execute any keyword during test pause with search functionality
• 📊 Call Stack Viewer: Navigate execution hierarchy for complex test debugging
• 🎨 Enhanced Logs: Color-coded failure logs with structured output
• 🔎 Keyword Search: Filter and find keywords quickly in large libraries
• 💾 Memory Efficient: Auto-trimming logs, lazy library loading

� How It Works

rfdb uses Robot Framework's Listener API v3 to monitor test execution in real-time:

1. Listens to Events: Hooks into test/keyword start/end events
2. Detects Failures: When a keyword fails, execution pauses
3. Opens GUI: Interactive debugger window appears automatically
4. Blocks Execution: Test waits while you inspect variables, logs, and call stack
5. User Actions: Continue, retry with modified args, or run custom keywords
6. Resumes Tests: Execution continues based on your action

Non-Intrusive: No need to modify test code - just add --listener flag!

�📦 Installation

pip install rfdb

Requirements:

• Python 3.10+
• Robot Framework 7.1.1+
• tkinter (usually included with Python)

🎯 Quick Start

Method 1: As a Listener (Recommended)

Run your tests with rfdb as a listener:

robot --listener rfdb your_test.robot

Or with multiple listeners:

robot --listener rfdb --listener OtherListener your_test.robot

Method 2: Import as Library

Add to your test file:

*** Settings ***
Library    rfdb

*** Test Cases ***
My Test Case
    Log    This test will pause on failures
    Should Be Equal    1    2    # Debugger will pause here

Then run:

robot your_test.robot

3. Debug Interactively

The debugger GUI opens automatically when a test fails:

• Click Continue to proceed
• Use Retry Failed Keyword tab to retry with different arguments
• Check Variable Inspector to see current state
• Run Custom Keywords to inspect or fix issues

📖 Usage Guide

Execution Control

Pause on Failure: Automatically pauses when any keyword fails Continue Button: Resume test execution Emergency Exit (Ctrl+Q): Force-close debugger immediately

Retry Failed Keyword Tab

1. Failed keyword appears in the list automatically
2. Modify arguments if needed
3. Click "Retry" to re-execute
4. Or click "Skip" to mark as passed and continue

# Example: Retry with corrected element locator
Click Element    id=wrong_button    # Fails
# In debugger: Change to id=correct_button and retry

Run Custom Keyword Tab

Execute any Robot Framework keyword during pause:

1. Search keywords: Type to filter (e.g., "click", "selenium")
2. Select keyword: Click from filtered list
3. Enter arguments: Add keyword arguments (comma-separated)
4. Execute: Run the keyword immediately

Supported Libraries:

• BuiltIn
• SeleniumLibrary
• RequestsLibrary
• DatabaseLibrary
• Any custom libraries in your test

Variable Inspector Tab

View all Robot Framework variables in real-time:

• Test Variables: Current test scope (${var})
• Suite Variables: Suite-level variables
• Global Variables: Global scope
• Built-in: ${TEST_NAME}, ${SUITE_NAME}, etc.

Auto-refreshes every second during active execution.

Call Stack Viewer

Click [STACK] View to see execution hierarchy:

Test: My Test Case
  └─ Keyword: Login To Application
      └─ Keyword: Input Text
          └─ Keyword: Wait Until Element Is Visible

⚙️ Configuration

Create rfdb_config.py in your project (optional):

# Customize log limits
MAX_LOG_LINES = 2000              # Default: 1000
MAX_FAILURE_LOG_LINES = 1000      # Default: 500

# Variable refresh rate (milliseconds)
VARIABLE_REFRESH_DELAY_MS = 500   # Default: 1000

🎨 Features in Detail

Enhanced Failure Logs

Color-coded for easy identification:

• [FAIL] - Failed tests (red)
• [PASS] - Passed tests (green)
• [WARN] - Warnings (yellow)
• [KEYWORD] - Keyword names (gold)
• [ARGS] - Arguments (mint green)

Keyword Search

Real-time filtering in "Run Custom Keyword" tab:

• Type to filter keywords instantly
• Case-insensitive search
• Shows library name for each keyword
• Library status indicator

Memory Management

• Auto-trims logs to prevent memory bloat
• Lazy-loads library keywords only when needed
• Duplicate library prevention
• Efficient variable refresh

🔧 Troubleshooting

Debugger doesn't pause on failures

• Ensure Library rfdb.RobotFrameworkDebugger is in your test Settings
• Check Robot Framework version (7.1.1+ required)

Keywords not showing in custom keyword list

• Libraries load lazily - they appear after first import
• Click "Refresh" button to reload
• Check library is imported in your test

Variables not updating

• Variables only refresh during active test execution
• Switch to Variable Inspector tab to trigger refresh
• Check test hasn't already completed

GUI not responding

• Press Ctrl+Q for emergency exit
• Keywords have 30-second timeout protection

🏗️ Architecture

• Listener API: Uses Robot Framework v3 Listener API
• Event-Driven: Thread-safe GUI updates
• Non-Blocking: Test execution and GUI run independently
• Memory Safe: Bounded logs, lazy loading

� Pro Tips

Best Practice: Use --listener flag instead of importing as library:

• ✅ No need to modify test files
• ✅ Works across all test suites
• ✅ Easy to enable/disable debugging
• ✅ Clean separation of concerns

For CI/CD: Simply remove --listener rfdb flag in automated runs

�📝 Examples

Example 1: Retry with Modified Arguments

*** Test Cases ***
Login Test
    Login To System    wrong_user    wrong_pass
    # Debugger pauses - correct credentials in retry tab
    # Click Retry with: correct_user, correct_pass

Example 2: Custom Keyword Debugging

*** Test Cases ***
Element Test
    Click Element    id=button
    # Fails - element not found
    # In Custom Keyword tab:
    #   1. Search "wait"
    #   2. Select "Wait Until Element Is Visible"
    #   3. Args: id=button, 10s
    #   4. Execute to check if element appears

Example 3: Variable Inspection

*** Test Cases ***
Variable Test
    ${result}=    Calculate Something
    # Pause and check Variable Inspector
    # See ${result} value before proceeding
    Should Be Equal    ${result}    expected_value

📄 License

MIT License - see LICENSE file for details

🔗 Links

• PyPI: https://pypi.org/project/rfdb/
• GitHub: https://github.com/suri-53/rfdb
• Issues: https://github.com/yourusername/rfdb/issues
• Robot Framework: https://robotframework.org/

📊 Version History

v2.0 (Latest)

• ✨ Added keyword search functionality
• 🎨 Enhanced log formatting with color-coded tags
• 📝 Replaced emojis with text indicators
• 🔧 Library loading improvements (duplicate prevention)
• 📊 Library status indicator
• 🐛 Bug fixes and performance improvements

v1.0.0

• 🎉 Initial release
• ⏸️ Pause/Continue functionality
• 🔄 Retry failed keywords
• 🔍 Variable inspector
• ⚡ Custom keyword execution

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Made with ❤️ for Robot Framework community

Features Overview

1. Execution Control

• Pause/Continue: Stop test execution at any point and resume when ready
• Emergency Exit (Ctrl+Q): Force-close debugger immediately
• Auto-timeout Protection: Keywords auto-continue after 30 seconds to prevent hangs

2. Failure Log

• Real-time display of test failures with detailed error messages
• Color-coded output for easy identification:
  • [FAIL] - Failed tests (red)
  • [PASS] - Passed tests (green)
  • [WARN] - Warnings (yellow)
• Automatic log trimming (keeps last 500 entries for performance)
• Shows test names, keyword names, arguments, and error messages

3. Retry Failed Keyword

• Select any failed keyword from the list
• Modify arguments before retrying
• One-click retry with current or modified arguments
• Useful for fixing flaky tests or environment issues

4. Run Custom Keyword

• Execute any Robot Framework keyword during test execution
• Search functionality: Filter available keywords in real-time
• Auto-loads keywords from imported libraries (lazy loading)
• Library status indicator shows loaded libraries and keyword count
• Duplicate library prevention for better performance
• Supports keywords from:
  • BuiltIn library
  • SeleniumLibrary
  • Any custom libraries imported in your tests

5. Variable Inspector

• View all Robot Framework variables in real-time
• Categories:
  • Test Variables: ${var} - Current test scope
  • Suite Variables: ${var} - Suite scope
  • Global Variables: ${var} - Global scope
  • Built-in Variables: ${TEST_NAME}, ${SUITE_NAME}, etc.
• Auto-refreshes during active test execution (1-second intervals)
• Shows "No active execution context" when tests aren't running

6. Call Stack Viewer

• View complete execution hierarchy
• Shows current test → keywords → nested keywords
• Helps understand execution flow and debug complex test structures
• Displays arguments passed to each level

Usage

Starting the Debugger

*** Settings ***
Library    path/to/RobotFrameworkDebugger.py

*** Test Cases ***
My Test
    Log    Test will pause at debugger

Run your test:

robot your_test.robot

Keyboard Shortcuts

• Ctrl+Q: Emergency exit (force close debugger)

Best Practices

1. Use Search: When running custom keywords, use the search box to quickly find keywords in large libraries

2. Monitor Variables: Switch to Variable Inspector tab during pauses to check test state

3. Retry Failures: Instead of re-running entire test suite, retry failed keywords directly

4. Check Call Stack: Use "View Call Stack" to understand where you are in nested keyword execution

5. Performance: Debugger limits logs to 1000 lines and failure logs to 500 lines for VDI/slow environments

Configuration

Edit these constants in gui.py if needed:

MAX_LOG_LINES = 1000              # Main log size
MAX_FAILURE_LOG_LINES = 500       # Failure log size  
VARIABLE_REFRESH_DELAY_MS = 1000  # Variable refresh rate (ms)

Troubleshooting

Debugger doesn't pause

• Check that the library is imported in your test Settings
• Verify Robot Framework version compatibility (v3+)

Keywords not loading

• Library loads lazily when first needed
• Click "Refresh" to force reload library keywords
• Check library import statements in your test

GUI freezes

• Press Ctrl+Q for emergency exit
• Keywords timeout automatically after 30 seconds
• Check VDI performance settings if running remotely

Variables not updating

• Variables only refresh during active test execution
• Switch to Variable Inspector tab to trigger refresh
• Check that test hasn't completed yet

Technical Details

• Framework: Robot Framework v3 Listener API
• GUI: Python Tkinter
• Architecture: Event-driven with thread-safe operations
• Memory Management: Auto-trimming logs, lazy library loading
• Error Handling: Timeout protection, graceful degradation

Version History

v2.0 (Current)

• Added search functionality for custom keywords
• Enhanced log formatting with color-coded tags
• Removed emojis, replaced with text indicators
• Library loading improvements (duplicate prevention, status display)
• Better error messages and visual hierarchy

Support

For issues or questions:

1. Check logs in failure log window
2. Review call stack for execution context
3. Verify library imports in test settings
4. Check Robot Framework version compatibility