Test Results

"use client"

import * as React from "react"
import { TestCase, TestResults } from "@/components/ui/test-results"

const FIT_CSS = "html,body{overflow:hidden}[data-fit-small] [data-fit-hide]{display:none!important}"

/**
 * 21st shows a demo in a small frame: about 674 by 421 on a component page, 358 by 224 on a
 * phone and 245 by 139 on a profile card. A demo taller than its frame gets scrollbars, which
 * render white on dark pages. FitFrame fills the frame exactly instead.
 *
 * - "scale": the content shrinks until it fits, centered. For visuals such as orbs.
 * - "crop": the content stays at full size from the top and fades out at the bottom. For text
 *   that streams in, where a changing scale would make the page breathe.
 *
 * `minWidth` lays out a wide demo (a table, a two column panel) at that width and scales it down
 * to the frame, instead of letting it collapse to a narrow layout. The frame centers it, so it
 * shrinks evenly on both sides.
 *
 * Anything marked `data-fit-hide` (state buttons, the chatcn.dev line) drops out in frames
 * shorter than `hideBelow`, so a profile card shows the visual alone.
 */
function FitFrame({
  children,
  mode = "scale",
  hideBelow = 360,
  minWidth,
}: {
  children: React.ReactNode
  mode?: "scale" | "crop"
  hideBelow?: number
  minWidth?: string
}) {
  const content = React.useRef<HTMLDivElement>(null)
  const [cropped, setCropped] = React.useState(false)

  React.useLayoutEffect(() => {
    const el = content.current
    if (!el) return
    const measure = () => {
      const vw = window.innerWidth
      const vh = window.innerHeight
      el.toggleAttribute("data-fit-small", vh < hideBelow)
      // Layout sizes ignore the transform, so measuring never feeds back.
      const w = Math.max(el.offsetWidth, el.scrollWidth)
      const h = Math.max(el.offsetHeight, el.scrollHeight)
      const scale = mode === "scale" ? Math.min(1, vw / w, vh / h) : 1
      el.style.transform = scale < 1 ? `scale(${scale})` : ""
      setCropped(mode === "crop" && h > vh + 1)
    }
    measure()
    const observer = new ResizeObserver(measure)
    observer.observe(el)
    // Content that changes inside a fixed width box (a headline that cycles words) never resizes
    // the box itself, so changes below it measure again on the next frame.
    let frame = 0
    const mutations = new MutationObserver(() => {
      cancelAnimationFrame(frame)
      frame = requestAnimationFrame(measure)
    })
    mutations.observe(el, { subtree: true, childList: true, characterData: true })
    window.addEventListener("resize", measure)
    return () => {
      observer.disconnect()
      mutations.disconnect()
      cancelAnimationFrame(frame)
      window.removeEventListener("resize", measure)
    }
  }, [mode, hideBelow])

  const fade = "linear-gradient(to bottom, #000 calc(100% - 40px), transparent)"
  return (
    <div
      className="flex w-full justify-center overflow-hidden"
      style={{
        height: "100dvh",
        alignItems: mode === "crop" ? "flex-start" : "center",
        maskImage: cropped ? fade : undefined,
        WebkitMaskImage: cropped ? fade : undefined,
      }}
    >
      <style>{FIT_CSS}</style>
      <div
        ref={content}
        className="w-full shrink-0"
        style={{ transformOrigin: mode === "crop" ? "top center" : "center", minWidth }}
      >
        {children}
      </div>
    </div>
  )
}

type Phase =
  | { kind: "running"; done: number }
  | { kind: "done"; fixed: boolean }
  | { kind: "rerun" }

type Plan = Omit<TestCase, "status"> & { result: "passed" | "failed" | "skipped" }

const STACK = `AssertionError: expected "fetch" to be called 3 times, but got 2 times
    at /Users/mira/code/checkout/tests/webhooks.test.ts:88:22
    at file:///Users/mira/code/checkout/node_modules/.pnpm/@vitest+runner@3.2.4/node_modules/@vitest/runner/dist/index.js:155:11
    at file:///Users/mira/code/checkout/node_modules/.pnpm/@vitest+runner@3.2.4/node_modules/@vitest/runner/dist/index.js:752:26
    at runTest (file:///Users/mira/code/checkout/node_modules/.pnpm/@vitest+runner@3.2.4/node_modules/@vitest/runner/dist/index.js:1897:5)
    at deliver (/Users/mira/code/checkout/src/lib/retry.ts:31:9)
    at processTicksAndRejections (node:internal/process/task_queues:105:5)`

const PLAN: Plan[] = [
  {
    id: "m1",
    file: "src/lib/money.test.ts",
    suite: ["formatMoney"],
    name: "formats cents in the store currency",
    durationMs: 2,
    result: "passed",
  },
  {
    id: "m2",
    file: "src/lib/money.test.ts",
    suite: ["formatMoney"],
    name: "rounds half to even",
    durationMs: 1,
    result: "passed",
  },
  {
    id: "m3",
    file: "src/lib/money.test.ts",
    suite: ["splitPayment"],
    name: "never loses a cent across splits",
    durationMs: 9,
    result: "passed",
  },
  {
    id: "i1",
    file: "src/api/intents.test.ts",
    name: "creates a payment intent for the cart total",
    durationMs: 84,
    result: "passed",
  },
  {
    id: "i2",
    file: "src/api/intents.test.ts",
    name: "reuses an intent for the same idempotency key",
    durationMs: 61,
    result: "passed",
  },
  {
    id: "i3",
    file: "src/api/intents.test.ts",
    name: "supports 3D Secure redirects",
    durationMs: 0,
    result: "skipped",
  },
  {
    id: "w1",
    file: "tests/webhooks.test.ts",
    suite: ["deliver"],
    name: "verifies the Stripe signature",
    durationMs: 4,
    result: "passed",
  },
  {
    id: "w2",
    file: "tests/webhooks.test.ts",
    suite: ["deliver"],
    name: "ignores duplicate event ids",
    durationMs: 2,
    result: "passed",
  },
  {
    id: "w3",
    file: "tests/webhooks.test.ts",
    suite: ["deliver"],
    name: "retries a failed delivery with backoff",
    durationMs: 61,
    result: "failed",
    error: {
      message: 'AssertionError: expected "fetch" to be called 3 times, but got 2 times',
      expected: "3",
      actual: "2",
      stack: STACK,
    },
  },
  {
    id: "w4",
    file: "tests/webhooks.test.ts",
    suite: ["deliver"],
    name: "gives up after maxRetries",
    durationMs: 18,
    result: "passed",
  },
  {
    id: "c1",
    file: "src/ui/cart.test.tsx",
    name: "renders an empty cart message",
    durationMs: 41,
    result: "passed",
  },
  {
    id: "c2",
    file: "src/ui/cart.test.tsx",
    name: "updates the total when quantity changes",
    durationMs: 77,
    result: "passed",
  },
  {
    id: "c3",
    file: "src/ui/cart.test.tsx",
    name: "removes an item with undo",
    durationMs: 112,
    result: "passed",
  },
]

function TestResultsDemo() {
  const [phase, setPhase] = React.useState<Phase>({ kind: "running", done: 0 })

  React.useEffect(() => {
    let id: number
    if (phase.kind === "running") {
      id = window.setTimeout(
        () =>
          setPhase(
            phase.done >= PLAN.length
              ? { kind: "done", fixed: false }
              : { kind: "running", done: phase.done + 1 },
          ),
        phase.done === 0 ? 500 : 180 + ((phase.done * 37) % 160),
      )
    } else if (phase.kind === "rerun") {
      id = window.setTimeout(() => setPhase({ kind: "done", fixed: true }), 1100)
    } else {
      // Rerun by itself after a while if nobody clicks, then start over.
      id = window.setTimeout(
        () => setPhase(phase.fixed ? { kind: "running", done: 0 } : { kind: "rerun" }),
        phase.fixed ? 4000 : 6000,
      )
    }
    return () => window.clearTimeout(id)
  }, [phase])

  const tests: TestCase[] = PLAN.map(({ result, ...t }, i) => {
    if (phase.kind === "running") {
      if (i < phase.done) return { ...t, status: result }
      if (i === phase.done)
        return { ...t, status: "running", durationMs: undefined, error: undefined }
      return { ...t, status: "queued", durationMs: undefined, error: undefined }
    }
    if (result === "failed") {
      if (phase.kind === "rerun")
        return { ...t, status: "running", durationMs: undefined, error: undefined }
      if (phase.kind === "done" && phase.fixed)
        return { ...t, status: "passed", durationMs: 58, error: undefined }
    }
    return { ...t, status: result }
  })

  return (
    <div className="w-full max-w-2xl">
      <TestResults
        tests={tests}
        running={phase.kind !== "done"}
        total={phase.kind === "rerun" ? undefined : PLAN.length}
        durationMs={phase.kind === "done" ? (phase.fixed ? 1180 : 2310) : undefined}
        onRerunFailed={() => setPhase({ kind: "rerun" })}
        onRerun={() => setPhase({ kind: "rerun" })}
        appRoot="/Users/mira/code/checkout"
        getFrameHref={(frame) =>
          frame.kind === "app"
            ? `vscode://file${frame.file}:${frame.line}:${frame.column}`
            : undefined
        }
        maxHeight={460}
      />
    </div>
  )
}

/** The line under each 21st demo that points back to the kit. */
function MoreOn({ slug, children }: { slug: string; children: React.ReactNode }) {
  return (
    <p data-fit-hide className="text-[0.75rem]/[1rem] text-(color:--chatcn-fg-faint) text-center text-balance">
      {children}{" "}
      <a
        href={`https://chatcn.dev/docs/components/${slug}`}
        target="_blank"
        rel="noopener"
        className="text-(color:--chatcn-fg-subtle) hover:text-(color:--chatcn-fg) underline underline-offset-2"
      >
        chatcn.dev
      </a>
    </p>
  )
}

/** The kit's own example, framed for the 21st preview. */
export default function TestResultsPreview() {
  return (
    <FitFrame minWidth="40rem">
      <div className="flex w-full flex-col items-center justify-center gap-4 p-6">
        <div className="flex h-[24rem] w-full max-w-2xl items-start justify-center">
          <TestResultsDemo />
        </div>
        <MoreOn slug="test-results">Test runs that stream in, with failures and stack traces. On</MoreOn>
      </div>
    </FitFrame>
  )
}