server/node_modules/@jimp/plugin-contain/test/contain.test.js

import { Jimp, mkJGD, hasOwnProp } from "@jimp/test-utils";
import configure from "@jimp/custom";
import blit from "@jimp/plugin-blit";
import resize from "@jimp/plugin-resize";
import scale from "@jimp/plugin-scale";

import contain from "../src";
import { expectToBeJGD } from "@jimp/test-utils/src";

const jimp = configure({ plugins: [scale, resize, blit, contain] }, Jimp);

describe("All align combinations for contain", () => {
  const verticalJGD = mkJGD(
    "▴▴▴▴▸▸▸▸",
    "▴▴▴▴▸▸▸▸",
    "▴▴▴▴▸▸▸▸",
    "▴▴▴▴▸▸▸▸",
    "▴▴▴▴▸▸▸▸",
    "▴▴▴▴▸▸▸▸",
    "▾▾▾▾◆◆◆◆",
    "▾▾▾▾◆◆◆◆",
    "▾▾▾▾◆◆◆◆",
    "▾▾▾▾◆◆◆◆",
    "▾▾▾▾◆◆◆◆",
    "▾▾▾▾◆◆◆◆"
  );

  const horizontalJGD = mkJGD(
    "▴▴▴▴▴▴▸▸▸▸▸▸",
    "▴▴▴▴▴▴▸▸▸▸▸▸",
    "▴▴▴▴▴▴▸▸▸▸▸▸",
    "▴▴▴▴▴▴▸▸▸▸▸▸",
    "▾▾▾▾▾▾◆◆◆◆◆◆",
    "▾▾▾▾▾▾◆◆◆◆◆◆",
    "▾▾▾▾▾▾◆◆◆◆◆◆",
    "▾▾▾▾▾▾◆◆◆◆◆◆"
  );

  let vertical;
  let horizontal; // stores the Jimp instances of the JGD images above.

  before((done) => {
    const img1 = jimp.read(verticalJGD);
    const img2 = jimp.read(horizontalJGD);
    Promise.all([img1, img2])
      .then((images) => {
        vertical = images[0];
        horizontal = images[1];
        done();
      })
      .catch(done);
  });

  const tests = {}; // Stores the expected result for each alignment combination.
  tests["LEFT TOP"] = {
    contain: {
      verti: mkJGD("▴▴▸▸  ", "▴▴▸▸  ", "▴▴▸▸  ", "▾▾◆◆  ", "▾▾◆◆  ", "▾▾◆◆  "),
      horiz: mkJGD("▴▴▴▸▸▸", "▴▴▴▸▸▸", "▾▾▾◆◆◆", "▾▾▾◆◆◆", "      ", "      "),
    },
  };
  tests["CENTER TOP"] = {
    contain: {
      verti: mkJGD(" ▴▴▸▸ ", " ▴▴▸▸ ", " ▴▴▸▸ ", " ▾▾◆◆ ", " ▾▾◆◆ ", " ▾▾◆◆ "),
      horiz: mkJGD("▴▴▴▸▸▸", "▴▴▴▸▸▸", "▾▾▾◆◆◆", "▾▾▾◆◆◆", "      ", "      "),
    },
  };
  tests["RIGHT TOP"] = {
    contain: {
      verti: mkJGD("  ▴▴▸▸", "  ▴▴▸▸", "  ▴▴▸▸", "  ▾▾◆◆", "  ▾▾◆◆", "  ▾▾◆◆"),
      horiz: mkJGD("▴▴▴▸▸▸", "▴▴▴▸▸▸", "▾▾▾◆◆◆", "▾▾▾◆◆◆", "      ", "      "),
    },
  };

  tests["LEFT MIDDLE"] = {
    contain: {
      verti: mkJGD("▴▴▸▸  ", "▴▴▸▸  ", "▴▴▸▸  ", "▾▾◆◆  ", "▾▾◆◆  ", "▾▾◆◆  "),
      horiz: mkJGD("      ", "▴▴▴▸▸▸", "▴▴▴▸▸▸", "▾▾▾◆◆◆", "▾▾▾◆◆◆", "      "),
    },
  };
  tests["CENTER MIDDLE"] = {
    contain: {
      verti: mkJGD(" ▴▴▸▸ ", " ▴▴▸▸ ", " ▴▴▸▸ ", " ▾▾◆◆ ", " ▾▾◆◆ ", " ▾▾◆◆ "),
      horiz: mkJGD("      ", "▴▴▴▸▸▸", "▴▴▴▸▸▸", "▾▾▾◆◆◆", "▾▾▾◆◆◆", "      "),
    },
  };
  tests["RIGHT MIDDLE"] = {
    contain: {
      verti: mkJGD("  ▴▴▸▸", "  ▴▴▸▸", "  ▴▴▸▸", "  ▾▾◆◆", "  ▾▾◆◆", "  ▾▾◆◆"),
      horiz: mkJGD("      ", "▴▴▴▸▸▸", "▴▴▴▸▸▸", "▾▾▾◆◆◆", "▾▾▾◆◆◆", "      "),
    },
  };

  tests["LEFT BOTTOM"] = {
    contain: {
      verti: mkJGD("▴▴▸▸  ", "▴▴▸▸  ", "▴▴▸▸  ", "▾▾◆◆  ", "▾▾◆◆  ", "▾▾◆◆  "),
      horiz: mkJGD("      ", "      ", "▴▴▴▸▸▸", "▴▴▴▸▸▸", "▾▾▾◆◆◆", "▾▾▾◆◆◆"),
    },
  };
  tests["CENTER BOTTOM"] = {
    contain: {
      verti: mkJGD(" ▴▴▸▸ ", " ▴▴▸▸ ", " ▴▴▸▸ ", " ▾▾◆◆ ", " ▾▾◆◆ ", " ▾▾◆◆ "),
      horiz: mkJGD("      ", "      ", "▴▴▴▸▸▸", "▴▴▴▸▸▸", "▾▾▾◆◆◆", "▾▾▾◆◆◆"),
    },
  };
  tests["RIGHT BOTTOM"] = {
    contain: {
      verti: mkJGD("  ▴▴▸▸", "  ▴▴▸▸", "  ▴▴▸▸", "  ▾▾◆◆", "  ▾▾◆◆", "  ▾▾◆◆"),
      horiz: mkJGD("      ", "      ", "▴▴▴▸▸▸", "▴▴▴▸▸▸", "▾▾▾◆◆◆", "▾▾▾◆◆◆"),
    },
  };

  function runAlignTest(align) {
    const jgdContainV = tests[align].contain.verti;
    const jgdContainH = tests[align].contain.horiz;
    let a = align.split(" ");
    a = Jimp["HORIZONTAL_ALIGN_" + a[0]] | Jimp["VERTICAL_ALIGN_" + a[1]];
    it("contain aligned to " + align, () => {
      expectToBeJGD(
        vertical.clone().contain(6, 6, a).getJGDSync(),
        jgdContainV
      );
      expectToBeJGD(
        horizontal.clone().contain(6, 6, a).getJGDSync(),
        jgdContainH
      );
    });
  }

  for (const align in tests) if (hasOwnProp(tests, align)) runAlignTest(align);
});