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Differential D213 Diff 797 lib/datastore/graph.test.js

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lib/datastore/graph.test.js

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const Graph = require("./graph.js");
const assert = require("assert");
describe("graph", () => {
let graph;
beforeEach(() => {
graph = new Graph();
});
it("Adding nodes and edges works correctly", () => {
graph.addNode(1, 0);
graph.addNode(2, 0);
graph.addNode(3, 0);
graph.addNode(4, 0);
graph.addNode(5, 1);
graph.addNode(6, 1);
graph.addNode(7, 0);
graph.addEdge(2, 3);
graph.addEdge(2, 4);
graph.addEdge(4, 5);
graph.addEdge(6, 7);
assert.deepEqual(graph.adjacency_matrix, [
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 1, 1, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 1, 0, 0],
[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 1],
[0, 0, 0, 0, 0, 0, 0],
]);
});
// L1 M3 +----L4----+
// + | |
// | | |
// v v v
// M2 L5 M6
// +
// |
// v
// M7
it("Correctly runs best-first search on simple graph", () => {
graph.addNode("L1", 1);
graph.addNode("M2", 0);
graph.addNode("M3", 0);
graph.addNode("L4", 1);
graph.addNode("L5", 1);
graph.addNode("M6", 0);
graph.addNode("M7", 0);
graph.addEdge("L1", "M2");
graph.addEdge("L4", "L5");
graph.addEdge("L4", "M6");
graph.addEdge("M6", "M7");
assert.deepEqual(
["M3", "L1", "M2", "L4", "M6", "M7", "L5"],
graph.bestFirstSearch()
);
});
// L1 M5 L6 +-----L12----+
// + + | |
// | | | |
// v v v v
// +-----L2----+ +-----O7-----+ M13 L14
// | | | | +
// | | | | |
// v v v v v
// M3 M4 +---L8---+ M11 M15
// | |
// v v
// M9 M10
it("Correctly runs best-first search on complex graph", () => {
graph.addNode("L1", 1);
graph.addNode("L2", 1);
graph.addNode("M3", 0);
graph.addNode("M4", 0);
graph.addNode("M5", 0);
graph.addNode("L6", 1);
graph.addNode("O7", 2);
graph.addNode("L8", 1);
graph.addNode("M9", 0);
graph.addNode("M10", 0);
graph.addNode("M11", 0);
graph.addNode("L12", 1);
graph.addNode("M13", 0);
graph.addNode("L14", 1);
graph.addNode("M15", 0);
graph.addEdge("L1", "L2");
graph.addEdge("L2", "M3");
graph.addEdge("L2", "M4");
graph.addEdge("L6", "O7");
graph.addEdge("O7", "L8");
graph.addEdge("L8", "M9");
graph.addEdge("L8", "M10");
graph.addEdge("O7", "M11");
graph.addEdge("L12", "M13");
graph.addEdge("L12", "L14");
graph.addEdge("L14", "M15");
const expectedOrder = [
"M5",
"L12",
"M13",
"L14",
"M15",
"L1",
"L2",
"M3",
"M4",
"L6",
"O7",
"M11",
"L8",
"M9",
"M10",
];
assert.deepEqual(expectedOrder, graph.bestFirstSearch());
});
});