1No vertices: 2directed: false 3vcount: 0 4edges: { 5} 6No edges: 7directed: false 8vcount: 5 9edges: { 10} 11Prefer more edges to make a star of double edges: 12directed: false 13vcount: 5 14edges: { 150 1 160 1 170 2 180 2 190 3 200 3 210 4 220 4 23} 24Prefer older edges to make a star: 25directed: false 26vcount: 7 27edges: { 280 1 290 1 300 2 310 3 320 3 330 4 340 5 350 5 360 6 37} 38Checking if adding one edge per step makes a tree. 39Checking if these errors are properly handled: 40Negative number of vertices. 41Negative number of edges. 42Negative aging bin. 43Negative zero appeal. 44