jest-preview/transforms/file.js

Preview your Jest tests in a browser

'use strict';

require('fs');
var path = require('path');
require('crypto');
require('child_process');
require('url');
var camelcase = require('camelcase');
var slash = require('slash');
var core = require('@svgr/core');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var path__default = /*#__PURE__*/_interopDefaultLegacy(path);
var camelcase__default = /*#__PURE__*/_interopDefaultLegacy(camelcase);
var slash__default = /*#__PURE__*/_interopDefaultLegacy(slash);

function getRelativeFilename(filename) {
    return slash__default["default"](filename.split(process.cwd())[1]);
}
function processFile(src, filename) {
    // /Users/your-name/your-project/src/assets/image.png => /src/assets/image.png
    const relativeFilenameStringified = JSON.stringify(getRelativeFilename(filename));
    // TODO: To support https://github.com/jpkleemans/vite-svg-loader and https://github.com/pd4d10/vite-plugin-svgr (already supported) as well
    if (filename.match(/\.svg$/)) {
        // Based on how SVGR generates a component name:
        // https://github.com/smooth-code/svgr/blob/01b194cf967347d43d4cbe6b434404731b87cf27/packages/core/src/state.js#L6
        const pascalCaseFilename = camelcase__default["default"](path__default["default"].parse(filename).name, {
            pascalCase: true,
        });
        const componentName = `Svg${pascalCaseFilename}`;
        try {
            const svgComponent = core.transform.sync(src, {
                // Do not insert `import * as React from "react";`
                jsxRuntime: 'automatic',
            }, { componentName });
            // We need to transpile jsx to vanilla jsx so Jest can understand
            // @babel/core is bundled with jest
            // I guess @babel/plugin-transform-react-jsx is installed by default? TODO: To validate this assumption
            // TODO: Do we have any other option to transpile jsx to vanilla jsx?
            // vite-plugin-svgr uses esbuild https://github.com/pd4d10/vite-plugin-svgr/blob/main/src/index.ts
            // How about add esbuild as dependency then use esbuild to transpile jsx to vanilla jsx?
            const babel = require('@babel/core');
            const result = babel.transformSync(svgComponent, {
                plugins: ['@babel/plugin-transform-react-jsx'],
            });
            // TODO: This is workaround to remove "export default". We might comeback to find a better solution
            const componentCodeWithoutExport = result.code
                .split('\n')
                .slice(0, -1) // Remove the last line
                .join('\n');
            return {
                // TODO: To render actual SVG to the snapshot
                code: `const React = require('react')
        ${componentCodeWithoutExport}
        module.exports = {
          __esModule: true,
          default: ${relativeFilenameStringified},
          ReactComponent: ${componentName}
        };`,
            };
        }
        catch (error) {
            // In case of there is any error, fallback to a span with filename
            return {
                code: `const React = require('react');
      module.exports = {
        __esModule: true,
        default: ${relativeFilenameStringified},
        ReactComponent: React.forwardRef(function ${componentName}(props, ref) {
          return {
            $$typeof: Symbol.for('react.element'),
            type: 'span',
            ref: ref,
            key: null,
            props: Object.assign({}, props, {
              children: ${relativeFilenameStringified}
            })
          };
        }),
      };`,
            };
        }
    }
    return {
        code: `module.exports = {
      __esModule: true,
      default: ${relativeFilenameStringified},
    };`,
    };
}

function process$1(src, filename) {
    return processFile(src, filename);
}
var file = { process: process$1 };

module.exports = file;