InitializeNativeFabricUIManager.js — react Source File

Source Code

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';

// Mock of the Native Hooks

const roots = new Map();
const allocatedTags = new Set();

function dumpSubtree(info, indent) {
  let out = '';
  out += ' '.repeat(indent) + info.viewName + ' ' + JSON.stringify(info.props);
  // eslint-disable-next-line no-for-of-loops/no-for-of-loops
  for (const child of info.children) {
    out += '\n' + dumpSubtree(child, indent + 2);
  }
  return out;
}

const RCTFabricUIManager = {
  __dumpChildSetForJestTestsOnly: function (childSet) {
    const result = [];
    // eslint-disable-next-line no-for-of-loops/no-for-of-loops
    for (const child of childSet) {
      result.push(dumpSubtree(child, 0));
    }
    return result.join('\n');
  },
  __dumpHierarchyForJestTestsOnly: function () {
    const result = [];
    // eslint-disable-next-line no-for-of-loops/no-for-of-loops
    for (const [rootTag, childSet] of roots) {
      result.push(rootTag);
      // eslint-disable-next-line no-for-of-loops/no-for-of-loops
      for (const child of childSet) {
        result.push(dumpSubtree(child, 1));
      }
    }
    return result.join('\n');
  },
  createNode: jest.fn(
    function createNode(reactTag, viewName, rootTag, props, eventTarget) {
      if (allocatedTags.has(reactTag)) {
        throw new Error(`Created two native views with tag ${reactTag}`);
      }

      allocatedTags.add(reactTag);
      return {
        reactTag: reactTag,
        viewName: viewName,
        props: props,
        children: [],
      };
    },
  ),
// ... (153 more lines)