import { describe, expect, it } from "vitest";
import { extractPeaks } from "../../src/media/peaks";

describe("waveform peak extraction", () => {
  it("covers every sample when bucket sizes are uneven", () => {
    const peaks = extractPeaks(Float32Array.of(0.1, -0.8, 0.2, 0.4, -1), 2);
    expect(peaks[0]).toBeCloseTo(0.8);
    expect(peaks[1]).toBe(1);
  });

  it("rejects invalid bounds and handles empty PCM", () => {
    expect(extractPeaks(new Float32Array(), 5)).toHaveLength(0);
    expect(() => extractPeaks(Float32Array.of(1), 0)).toThrow(/positive/u);
  });
});