pdf-visual-diff/lib/pdf2png/pdf2png.test.js

Visual Regression Testing for PDFs in JavaScript

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
const node_test_1 = require("node:test");
const assert = __importStar(require("node:assert/strict"));
const path_1 = require("path");
const node_os_1 = require("node:os");
const pdf2png_1 = require("./pdf2png");
const compare_images_1 = require("../compare-images");
const types_1 = require("../types");
// Tolerance for cross-platform font rendering differences
// Snapshots are generated on Linux, so use strict tolerance there
const isLinux = (0, node_os_1.platform)() === 'linux';
const crossPlatformTolerance = isLinux ? 0 : 0.05;
const testDataDir = (0, path_1.join)(__dirname, '../test-data');
const pdfs = (0, path_1.join)(testDataDir, 'pdfs');
const singlePage = (0, path_1.join)(pdfs, 'single-page.pdf');
const twoPage = (0, path_1.join)(pdfs, 'two-page.pdf');
const cmaps = (0, path_1.join)(pdfs, 'cmaps.pdf');
const expectedDir = (0, path_1.join)(testDataDir, 'pdf2png-expected');
(0, node_test_1.describe)('pdf2png()', () => {
    (0, node_test_1.it)('two-page.pdf png per page with scaling', () => {
        const expectedImage1Path = (0, path_1.join)(expectedDir, 'two-page_png_per_page_scaled_1.png');
        const expectedImage2Path = (0, path_1.join)(expectedDir, 'two-page_png_per_page_scaled_2.png');
        return (0, pdf2png_1.pdf2png)(twoPage, { dpi: types_1.Dpi.High })
            .then((imgs) => {
            return Promise.all([
                (0, compare_images_1.compareImages)(expectedImage1Path, [imgs[0]]),
                (0, compare_images_1.compareImages)(expectedImage2Path, [imgs[1]]),
            ]);
        })
            .then((results) => {
            results.forEach((x) => assert.strictEqual(x.equal, true));
        });
    });
    (0, node_test_1.it)('two-page.pdf png per page and without scaling', () => {
        const expectedImage1Path = (0, path_1.join)(expectedDir, 'two-page_png_per_page_1.png');
        const expectedImage2Path = (0, path_1.join)(expectedDir, 'two-page_png_per_page_2.png');
        return (0, pdf2png_1.pdf2png)(twoPage, { dpi: types_1.Dpi.Low })
            .then((imgs) => {
            return Promise.all([
                (0, compare_images_1.compareImages)(expectedImage1Path, [imgs[0]]),
                (0, compare_images_1.compareImages)(expectedImage2Path, [imgs[1]]),
            ]);
        })
            .then((results) => {
            results.forEach((x) => assert.strictEqual(x.equal, true));
        });
    });
    (0, node_test_1.it)('should scale using custom DPI', () => {
        const expectedImagePath = (0, path_1.join)(expectedDir, 'should_scale_using_custom_DPI.png');
        return (0, pdf2png_1.pdf2png)(singlePage, { dpi: 200 })
            .then((imgs) => (0, compare_images_1.compareImages)(expectedImagePath, imgs))
            .then((result) => assert.strictEqual(result.equal, true));
    });
    (0, node_test_1.it)('pdf that requires cmaps', async () => {
        const expectedImagePath = (0, path_1.join)(expectedDir, 'cmaps.png');
        const imgs = await (0, pdf2png_1.pdf2png)(cmaps);
        const result = await (0, compare_images_1.compareImages)(expectedImagePath, imgs, {
            tolerance: crossPlatformTolerance,
        });
        assert.strictEqual(result.equal, true);
    });
});
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