Test suite executed from CI pipeline (#433)

* Test strategy & test cases

* Unit tests

* Integration tests

tests/unit/test_gateway/test_running.py

@@ -0,0 +1,90 @@
+"""
+Tests for Gateway Running utility class
+"""
+
+import pytest
+
+from trustgraph.gateway.running import Running
+
+
+class TestRunning:
+    """Test cases for Running class"""
+
+    def test_running_initialization(self):
+        """Test Running class initialization"""
+        running = Running()
+        
+        # Should start with running = True
+        assert running.running is True
+
+    def test_running_get_method(self):
+        """Test Running.get() method returns current state"""
+        running = Running()
+        
+        # Should return True initially
+        assert running.get() is True
+        
+        # Should return False after stopping
+        running.stop()
+        assert running.get() is False
+
+    def test_running_stop_method(self):
+        """Test Running.stop() method sets running to False"""
+        running = Running()
+        
+        # Initially should be True
+        assert running.running is True
+        
+        # After calling stop(), should be False
+        running.stop()
+        assert running.running is False
+
+    def test_running_stop_is_idempotent(self):
+        """Test that calling stop() multiple times is safe"""
+        running = Running()
+        
+        # Stop multiple times
+        running.stop()
+        assert running.running is False
+        
+        running.stop()
+        assert running.running is False
+        
+        # get() should still return False
+        assert running.get() is False
+
+    def test_running_state_transitions(self):
+        """Test the complete state transition from running to stopped"""
+        running = Running()
+        
+        # Initial state: running
+        assert running.get() is True
+        assert running.running is True
+        
+        # Transition to stopped
+        running.stop()
+        assert running.get() is False
+        assert running.running is False
+
+    def test_running_multiple_instances_independent(self):
+        """Test that multiple Running instances are independent"""
+        running1 = Running()
+        running2 = Running()
+        
+        # Both should start as running
+        assert running1.get() is True
+        assert running2.get() is True
+        
+        # Stop only one
+        running1.stop()
+        
+        # States should be independent
+        assert running1.get() is False
+        assert running2.get() is True
+        
+        # Stop the other
+        running2.stop()
+        
+        # Both should now be stopped
+        assert running1.get() is False
+        assert running2.get() is False