Add test for getAsciiArt

dodok8 · dodok8 · commit 15683a580501 · 2025-07-15T21:22:28.000+09:00
diff --git a/cli/node.test.ts b/cli/node.test.ts
@@ -1,6 +1,6 @@
 import { assertEquals } from "@std/assert";
 import fetchMock from "fetch-mock";
-import { getFaviconUrl, rgbTo256Color } from "./node.ts";
+import { getAsciiArt, getFaviconUrl, Jimp, rgbTo256Color } from "./node.ts";
 
 const HTML_WITH_SMALL_ICON = `
 <!DOCTYPE html>
@@ -153,3 +153,16 @@ Deno.test("rgbTo256Color - check grayscale", () => {
   );
   assertEquals(results, EXPECTED_GRAY_IDX);
 });
+
+Deno.test("getAsciiArt - Darkest Letter", () => {
+  // Create black and white 1x1 images using Jimp constructor
+  const blackImage = new Jimp({ width: 1, height: 1, color: 0x000000ff });
+
+  const blackResult = getAsciiArt(
+    blackImage as unknown as Parameters<typeof getAsciiArt>[0],
+    1,
+    true,
+  );
+
+  assertEquals(blackResult.includes("█"), true);
+});
diff --git a/cli/node.ts b/cli/node.ts
@@ -253,7 +253,7 @@ export async function getFaviconUrl(
   return new URL("/favicon.ico", response.url);
 }
 
-const Jimp = createJimp({
+export const Jimp = createJimp({
   formats: [...defaultFormats, webp],
   plugins: defaultPlugins,
 });
@@ -323,7 +323,7 @@ export function rgbTo256Color(r: number, g: number, b: number): number {
   return 16 + (36 * r6) + (6 * g6) + b6;
 }
 
-function getAsciiArt(
+export function getAsciiArt(
   image: Awaited<ReturnType<typeof Jimp.read>>,
   width = DEFAULT_IMAGE_WIDTH,
   trueColorSupport: boolean,
