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, 70 insertions, 0 deletions

diff --git a/test-protocols.sh b/test-protocols.sh
new file mode 100755
index 0000000..2edbef9
--- /dev/null
+++ b/test-protocols.sh
@@ -0,0 +1,70 @@
+#!/bin/bash
+#
+# DS-Sim Protocol Test Runner
+# 
+# This script runs protocol simulation tests in headless mode.
+# GUI decoupling has been implemented, so tests run cleanly without GUI errors.
+#
+
+echo "DS-Sim Protocol Test Runner"
+echo "=========================="
+echo
+
+# Check if we're in the right directory
+if [ ! -f "pom.xml" ]; then
+    echo "ERROR: Please run this script from the project root directory"
+    exit 1
+fi
+
+# Build if needed
+if [ ! -d "target/classes" ]; then
+    echo "Building project..."
+    mvn compile -q || { echo "Build failed!"; exit 1; }
+fi
+
+# Menu
+echo "Choose an option:"
+echo "1) Run all protocol tests"
+echo "2) Run specific protocol test"
+echo "3) Run tests with detailed logs"
+echo "4) Test GUI decoupling (verify no GUI errors)"
+echo "5) Exit"
+echo
+
+read -p "Enter choice [1-5]: " choice
+
+case $choice in
+    1)
+        echo "Running all protocol tests..."
+        java -cp target/classes:target/test-classes -Djava.awt.headless=true testing.HeadlessProtocolRunner
+        ;;
+    2)
+        echo "Available simulations:"
+        ls saved-simulations/*.dat | sed 's/saved-simulations\//  - /g'
+        echo
+        read -p "Enter simulation name (without .dat): " sim
+        if [ -f "saved-simulations/${sim}.dat" ]; then
+            java -cp target/classes:target/test-classes -Djava.awt.headless=true \
+                testing.HeadlessProtocolRunner "saved-simulations/${sim}.dat"
+        else
+            echo "Simulation not found!"
+        fi
+        ;;
+    3)
+        echo "Running tests with detailed logs..."
+        java -cp target/classes:target/test-classes -Djava.awt.headless=true \
+            -Dds.sim.verbose=true testing.HeadlessProtocolRunner
+        ;;
+    4)
+        echo "Testing GUI decoupling..."
+        java -cp target/classes:target/test-classes testing.TestNoGuiErrors
+        ;;
+    5)
+        echo "Exiting..."
+        exit 0
+        ;;
+    *)
+        echo "Invalid choice!"
+        exit 1
+        ;;
+esac
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