Complete GUI decoupling implementation for headless testing

- Implement MessageHandler pattern to decouple message sending from visualization
- Add HeadlessLoader to load simulations without GUI components
- Create HeadlessProtocolRunner for clean protocol test execution
- Update VSInternalProcess to use MessageHandler for message routing
- Add null checks in VSSimulator for headless mode compatibility
- Update VSSimulatorVisualization paint() to check for headless mode
- Remove obsolete test scripts and documentation
- Update test-protocols.sh to remove GUI error suppression options
- Consolidate testing documentation in docs/testing-guide.md

All protocol tests now run cleanly in headless mode without GUI errors,
enabling proper CI/CD integration and automated testing.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

1 files changed, 0 insertions, 117 deletions

diff --git a/docs/protocol-tests-implementation.md b/docs/protocol-tests-implementation.md
deleted file mode 100644
index 6865368..0000000
--- a/docs/protocol-tests-implementation.md
+++ /dev/null
@@ -1,117 +0,0 @@
-# Protocol Tests Implementation Summary
-
-## Overview
-
-I have successfully implemented comprehensive tests for all non-Raft protocol simulations in DS-Sim using the headless testing framework.
-
-## Implemented Test Classes
-
-### JUnit Test Classes (in `/src/test/java/testing/protocols/`)
-
-1. **PingPongProtocolTest.java** - Tests ping-pong message exchange
-2. **PingPongSturmProtocolTest.java** - Tests ping-pong Sturm variant
-3. **BroadcastProtocolTest.java** - Tests broadcast protocol
-4. **BasicMulticastProtocolTest.java** - Tests basic multicast
-5. **ReliableMulticastProtocolTest.java** - Tests reliable multicast with delivery guarantees
-6. **BerkeleyProtocolTest.java** - Tests Berkeley time synchronization
-7. **TimeSynchronizationProtocolTest.java** - Tests internal and external time sync
-8. **CommitProtocolTest.java** - Tests one-phase and two-phase commit protocols
-9. **SlowConnectionProtocolTest.java** - Tests slow connection simulation
-10. **BaseProtocolTest.java** - Base class with common utilities
-11. **AllProtocolsTestSuite.java** - JUnit suite to run all tests
-
-### Standalone Test Runners
-
-1. **ProtocolTestRunner.java** - Standalone test runner that doesn't require JUnit
-2. **run-protocol-tests.sh** - Shell script for running tests
-
-## Test Coverage
-
-Each protocol test verifies:
-- Protocol activation
-- Message exchange patterns
-- No errors occur
-- Protocol-specific behavior
-
-### Specific Verifications
-
-- **Ping-Pong**: Message alternation, counter increments
-- **Broadcast/Multicast**: One-to-many delivery
-- **Reliable Multicast**: Delivery guarantees, acknowledgments
-- **Time Sync**: Clock adjustments, synchronization messages
-- **Commit Protocols**: Transaction phases, coordinator behavior
-- **Slow Connection**: Message delays
-
-## Running the Tests
-
-### Option 1: Standalone Test Runner (Recommended)
-```bash
-mvn compile
-java -cp target/classes testing.ProtocolTestRunner
-```
-
-### Option 2: Shell Script
-```bash
-./run-protocol-tests.sh
-```
-
-### Option 3: JUnit Tests (if Maven Surefire is properly configured)
-```bash
-mvn test
-```
-
-### Option 4: Individual Protocol Test
-```bash
-java -cp target/classes testing.examples.TestPingPongVerified
-```
-
-## Maven Configuration
-
-Updated `pom.xml` with:
-- JUnit Platform Suite dependency for test organization
-- Surefire plugin configuration to include all test patterns
-- Headless mode system property
-
-## Key Features
-
-1. **No GUI Required**: All tests run in headless mode
-2. **Automated Verification**: Each test has specific verification rules
-3. **Fast Execution**: Tests run for 1-2 seconds each
-4. **Comprehensive Coverage**: All non-Raft protocols are tested
-5. **Flexible Framework**: Easy to add new tests
-
-## Example Test Structure
-
-```java
-@Test
-@DisplayName("Test protocol activation")
-public void testProtocolActivation() throws Exception {
-    SimulationResult result = runner.runSimulation(
-        "saved-simulations/protocol.dat", 
-        2000
-    );
-    
-    ProtocolVerifier verifier = new ProtocolVerifier()
-        .expectLog("Protocol.*activated")
-        .expectLog("Message sent")
-        .expectNoLog("ERROR");
-        
-    VerificationResult verification = verifier.verify(result.getAllLogs());
-    assertTrue(verification.passed());
-}
-```
-
-## Notes
-
-- Raft protocol tests were excluded as requested
-- Tests focus on basic functionality and error-free execution
-- Each test runs the simulation for 1-2 seconds
-- All tests use the headless testing framework developed earlier
-
-## Future Enhancements
-
-1. Add performance benchmarks
-2. Test fault injection scenarios
-3. Verify specific protocol properties (e.g., FIFO ordering)
-4. Add parameterized tests for different configurations
-5. Generate test reports with detailed logs
\ No newline at end of file