import assert from "node:assert/strict"
import { describe, it } from "node:test"
import { computeImageInsertFrameSize } from "./docs-graphic-image-size.ts"

describe("docs-graphic-image-size", () => {
  it("preserves aspect ratio for landscape images", () => {
    const frame = computeImageInsertFrameSize(1920, 1080)
    assert.equal(frame.width, 560)
    assert.equal(frame.height, 315)
    assert.ok(Math.abs(frame.width / frame.height - 1920 / 1080) < 0.02)
  })

  it("preserves aspect ratio for portrait images", () => {
    const frame = computeImageInsertFrameSize(1080, 1920)
    assert.equal(frame.height, 720)
    assert.equal(frame.width, 405)
    assert.ok(Math.abs(frame.width / frame.height - 1080 / 1920) < 0.02)
  })

  it("keeps small images at natural size", () => {
    const frame = computeImageInsertFrameSize(200, 150)
    assert.equal(frame.width, 200)
    assert.equal(frame.height, 150)
  })

  it("falls back when natural size is invalid", () => {
    const frame = computeImageInsertFrameSize(0, 0)
    assert.equal(frame.width, 240)
    assert.equal(frame.height, 160)
  })
})