8aed9d462f
* Adopt type=module follow changes in d3-format: * type=module * add exports * remove zip * license: ISC * update dependencies * es6 rather than no-undef * remove Sublime project * add eslint.json * related d3/d3#3502; extract copyrights from LICENSE * update dependencies * stricter eslint * cleaner imports * Update README Co-authored-by: Mike Bostock <mbostock@gmail.com>
78 lines
2.2 KiB
JavaScript
78 lines
2.2 KiB
JavaScript
import assert from "assert";
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import {forceSimulation, forceX, forceY} from "../src/index.js";
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import {assertNodeEqual} from "./asserts.js";
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it("forceX centers nodes", () => {
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const x = forceX(200);
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const f = forceSimulation().force("x", x).stop();
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const a = { x: 100, y: 0 }, b = { x: 200, y: 0 }, c = { x: 300, y: 0 };
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f.nodes([a, b, c]);
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f.tick(30);
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assert(a.x > 190);
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assert(a.vx > 0);
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assert.strictEqual(b.x, 200);
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assert.strictEqual(b.vx, 0);
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assert(c.x < 210);
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assert(c.vx < 0);
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});
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it("forceY centers nodes", () => {
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const y = forceY(200);
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const f = forceSimulation().force("y", y).stop();
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const a = { y: 100, x: 0 }, b = { y: 200, x: 0 }, c = { y: 300, x: 0 };
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f.nodes([a, b, c]);
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f.tick(30);
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assert(a.y > 190);
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assert(a.vy > 0);
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assert.strictEqual(b.y, 200);
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assert.strictEqual(b.vy, 0);
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assert(c.y < 210);
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assert(c.vy < 0);
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});
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it("forceX respects fixed positions", () => {
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const x = forceX(200);
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const f = forceSimulation().force("x", x).stop();
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const a = { fx: 0, fy:0 }, b = {}, c = {};
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f.nodes([a, b, c]);
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f.tick();
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assertNodeEqual(a, { fx: 0, fy: 0, index: 0, x: 0, y: 0, vy: 0, vx: 0 });
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});
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it("forceY respects fixed positions", () => {
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const y = forceX(200);
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const f = forceSimulation().force("y", y).stop();
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const a = { fx: 0, fy:0 }, b = {}, c = {};
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f.nodes([a, b, c]);
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f.tick();
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assertNodeEqual(a, { fx: 0, fy: 0, index: 0, x: 0, y: 0, vy: 0, vx: 0 });
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});
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it("forceX.x() accessor", () => {
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const x = forceX().x(d => d.x0);
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const f = forceSimulation().force("x", x).stop();
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const a = { x: 100, y: 0, x0: 300 }, b = { x: 200, y: 0, x0: 200 }, c = { x: 300, y: 0, x0: 100 };
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f.nodes([a, b, c]);
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f.tick(30);
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assert(a.x > 290);
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assert(a.vx > 0);
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assert.strictEqual(b.x, 200);
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assert.strictEqual(b.vx, 0);
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assert(c.x < 110);
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assert(c.vx < 0);
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});
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it("forceY.y() accessor", () => {
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const y = forceY().y(d => d.y0);
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const f = forceSimulation().force("y", y).stop();
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const a = { y: 100, x: 0, y0: 300 }, b = { y: 200, x: 0, y0: 200 }, c = { y: 300, x: 0, y0: 100 };
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f.nodes([a, b, c]);
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f.tick(30);
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assert(a.y > 290);
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assert(a.vy > 0);
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assert.strictEqual(b.y, 200);
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assert.strictEqual(b.vy, 0);
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assert(c.y < 110);
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assert(c.vy < 0);
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});
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