lobo
833e1ec8dc
Each algorithm page shows its numbers with app-metrics. FpsCounter publishes a rate every 500 ms, not every frame. Fractal 2D reset now also resets the zoom slider.
31 lines
802 B
TypeScript
31 lines
802 B
TypeScript
import {FpsCounter} from './fps-counter';
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describe('FpsCounter', () => {
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const FRAME_MS = 1000 / 60;
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it('publishes 60 after the first 500 ms window and not before', () => {
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const counter = new FpsCounter();
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const at = (frame: number) => 1 + FRAME_MS * frame;
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for (let frame = 0; at(frame) - 1 < 500; frame++) {
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counter.tick(at(frame));
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}
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expect(counter.fps()).toBe(0);
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counter.tick(at(30)); // 30 ticks since the window opened, 500 ms elapsed
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expect(counter.fps()).toBe(60);
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});
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it('reset sets the rate back to 0', () => {
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const counter = new FpsCounter();
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for (let i = 0; i <= 61; i++) {
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counter.tick(1 + FRAME_MS * i);
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}
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expect(counter.fps()).toBeGreaterThan(0);
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counter.reset();
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expect(counter.fps()).toBe(0);
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});
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});
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