Add unit tests for NoExitSecurityManager

src/test/java/org/codehaus/gmavenplus/util/NoExitSecurityManagerTest.java

@@ -0,0 +1,62 @@
+package org.codehaus.gmavenplus.util;
+
+import org.junit.Test;
+import java.security.Permission;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+
+/**
+ * Unit tests for the NoExitSecurityManager class.
+ *
+ * @author Keegan Witt
+ */
+public class NoExitSecurityManagerTest {
+
+    @Test
+    public void testConstructorWithParent() {
+        SecurityManager parent = new SecurityManager();
+        NoExitSecurityManager manager = new NoExitSecurityManager(parent);
+        // Verification of parent is indirect via checkPermission delegation
+    }
+
+    @Test
+    public void testDefaultConstructor() {
+        new NoExitSecurityManager();
+    }
+
+    @Test
+    public void testCheckPermissionDelegates() {
+        StubSecurityManager parent = new StubSecurityManager();
+        NoExitSecurityManager manager = new NoExitSecurityManager(parent);
+        Permission perm = new java.security.AllPermission();
+        manager.checkPermission(perm);
+        assertTrue("Expected checkPermission to be called on parent", parent.checkPermissionCalled);
+        assertEquals("Expected correct permission to be passed to parent", perm, parent.passedPermission);
+    }
+
+    @Test
+    public void testCheckPermissionWithNullParent() {
+        NoExitSecurityManager manager = new NoExitSecurityManager(null);
+        manager.checkPermission(new java.security.AllPermission());
+        // Should not throw NullPointerException
+    }
+
+    @Test(expected = SecurityException.class)
+    public void testCheckExitThrowsException() {
+        NoExitSecurityManager manager = new NoExitSecurityManager();
+        manager.checkExit(1);
+    }
+
+    private static class StubSecurityManager extends SecurityManager {
+        boolean checkPermissionCalled = false;
+        Permission passedPermission = null;
+
+        @Override
+        public void checkPermission(Permission perm) {
+            checkPermissionCalled = true;
+            passedPermission = perm;
+        }
+    }
+
+}