90 lines
4.4 KiB
JavaScript
90 lines
4.4 KiB
JavaScript
import { test } from "node:test";
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import assert from "node:assert/strict";
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import { canvasReducer, canvasStorageKey, decodeCanvas, emptyCanvas, makeCanvasNode } from "../src/lib/canvas.ts";
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function seeded() {
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const document = emptyCanvas();
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document.nodes = [makeCanvasNode("text", { x: 20, y: 30 }), makeCanvasNode("script", { x: 400, y: 30 })];
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document.edges = [{ id: "edge", source: document.nodes[0].id, target: document.nodes[1].id }];
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return { past: [], present: document, future: [] };
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}
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test("node dragging updates its position; undo and redo retain the current viewport", () => {
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let state = seeded();
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const id = state.present.nodes[0].id;
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state = canvasReducer(state, { type: "checkpoint" });
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state = canvasReducer(state, { type: "nodes", changes: [{ id, type: "position", position: { x: 220, y: -30 }, dragging: true }] });
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assert.deepEqual(state.present.nodes[0].position, { x: 220, y: -30 });
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state = canvasReducer(state, { type: "viewport", viewport: { x: -500, y: 200, zoom: 0.5 } });
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state = canvasReducer(state, { type: "undo" });
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assert.deepEqual(state.present.nodes[0].position, { x: 20, y: 30 });
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assert.deepEqual(state.present.viewport, { x: -500, y: 200, zoom: 0.5 });
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state = canvasReducer(state, { type: "redo" });
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assert.deepEqual(state.present.nodes[0].position, { x: 220, y: -30 });
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});
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test("deleting a node removes attached edges and undo restores both", () => {
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const initial = seeded();
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const removed = canvasReducer(initial, { type: "nodes", changes: [{ id: initial.present.nodes[0].id, type: "remove" }] });
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assert.equal(removed.present.nodes.length, 1);
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assert.equal(removed.present.edges.length, 0);
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const afterEdgeNotification = canvasReducer(removed, { type: "edges", changes: [{ id: "edge", type: "remove" }] });
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assert.equal(afterEdgeNotification.past.length, 1);
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const restored = canvasReducer(afterEdgeNotification, { type: "undo" });
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assert.equal(restored.present.nodes.length, 2);
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assert.equal(restored.present.edges.length, 1);
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});
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test("a text editing session is undoable as one operation", () => {
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let state = seeded();
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const id = state.present.nodes[0].id;
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state = canvasReducer(state, { type: "checkpoint" });
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state = canvasReducer(state, { type: "edit", id, text: "a" });
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state = canvasReducer(state, { type: "edit", id, text: "a new idea" });
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assert.equal(state.past.length, 1);
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assert.equal(canvasReducer(state, { type: "undo" }).present.nodes[0].data.text, "");
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});
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test("export/import retains nodes, edges, text, images and the viewport", () => {
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const document = seeded().present;
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const image = makeCanvasNode("image", { x: 80, y: 90 }, "data:image/png;base64,YQ==");
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document.nodes.push(image);
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document.nodes[0].data.text = "hello";
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document.nodes[0].selected = true;
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document.viewport = { x: 12, y: -28, zoom: 0.67 };
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const restored = decodeCanvas(JSON.stringify(document));
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assert.equal(restored.nodes[0].data.text, "hello");
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assert.equal(restored.nodes[0].selected, undefined);
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assert.equal(restored.nodes[2].data.src, image.data.src);
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assert.deepEqual(restored.edges, document.edges);
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assert.deepEqual(restored.viewport, document.viewport);
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});
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test("import rejects dangling connections, duplicate nodes, unsafe images and invalid zoom", () => {
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for (const mutate of [
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(doc) => { doc.edges[0].target = "missing"; },
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(doc) => { doc.nodes.push(doc.nodes[0]); },
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(doc) => { doc.nodes.push(makeCanvasNode("image", { x: 0, y: 0 }, "javascript:alert(1)")); },
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(doc) => { doc.viewport.zoom = 0; },
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]) {
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const document = seeded().present;
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mutate(document);
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assert.throws(() => decodeCanvas(JSON.stringify(document)));
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}
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});
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test("draft storage is isolated by workspace and graph", () => {
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assert.notEqual(canvasStorageKey("workspace-a", "board"), canvasStorageKey("workspace-b", "board"));
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assert.notEqual(canvasStorageKey("workspace", "board-a"), canvasStorageKey("workspace", "board-b"));
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});
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test("undo history is bounded and new edits clear the redo stack", () => {
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let state = seeded();
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for (let i = 0; i < 50; i++) state = canvasReducer(state, { type: "replace", document: { ...state.present, edges: [] } });
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assert.equal(state.past.length, 40);
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state = canvasReducer(state, { type: "undo" });
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assert.equal(state.future.length, 1);
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state = canvasReducer(state, { type: "nodes", changes: [{ type: "add", item: makeCanvasNode("text", { x: 0, y: 0 }) }] });
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assert.equal(state.future.length, 0);
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});
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