pavel444-byte
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49 lines
1.5 KiB
TypeScript
49 lines
1.5 KiB
TypeScript
import assert from "node:assert/strict";
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import { test } from "node:test";
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import {
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easeOut,
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easeInOut,
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enter,
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visibility,
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shots,
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} from "../cinematics/motion.mjs";
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test("cinematic timeline preserves all real site captures and covers exactly thirty seconds", () => {
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assert.equal(shots[0].start, 0);
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assert.equal(shots.at(-1)?.end, 30);
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assert.deepEqual(
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shots.flatMap((s) => (s.image ? [s.image] : [])),
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["home", "catalog", "game", "map"],
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);
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for (let i = 1; i < shots.length; i++)
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assert.equal(shots[i].start, shots[i - 1].end);
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});
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test("canonical motion curves clamp endpoints and have no overshoot", () => {
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for (const curve of [easeOut, easeInOut]) {
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assert.equal(curve(-1), 0);
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assert.equal(curve(0), 0);
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assert.equal(curve(1), 1);
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assert.equal(curve(2), 1);
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let previous = 0;
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for (let i = 0; i <= 100; i++) {
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const n = curve(i / 100);
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assert.ok(n >= previous && n <= 1);
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previous = n;
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}
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}
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assert.ok(
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easeOut(0.25) > 0.6,
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"the entry must respond promptly rather than ease in",
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);
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});
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test("screenshots settle quickly and stay fully readable throughout the hold", () => {
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for (const shot of shots.filter((s) => s.image)) {
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assert.equal(enter(shot.start + 0.25, shot.start), 1);
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assert.equal(visibility(shot.start + 1, shot.start, shot.end), 1);
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assert.equal(visibility(shot.end - 1, shot.start, shot.end), 1);
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assert.equal(visibility(shot.end, shot.start, shot.end), 0);
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}
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});
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