Code coverage report for jade/lib/utils.js

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'use strict';
 
/**
 * Merge `b` into `a`.
 *
 * @param {Object} a
 * @param {Object} b
 * @return {Object}
 * @api public
 */
 
exports.merge = function(a, b) {
  for (var key in b) a[key] = b[key];
  return a;
};
 
exports.walkAST = function walkAST(ast, before, after) {
  before && before(ast);
  switch (ast.type) {
    case 'Block':
      ast.nodes.forEach(function (node) {
        walkAST(node, before, after);
      });
      break;
    case 'Case':
    case 'Each':
    case 'Mixin':
    case 'Tag':
    case 'When':
    case 'Code':
      ast.block && walkAST(ast.block, before, after);
      break;
    case 'Attrs':
    case 'BlockComment':
    case 'Comment':
    case 'Doctype':
    case 'Filter':
    case 'Literal':
    case 'MixinBlock':
    case 'Text':
      break;
    default:
      throw new Error('Unexpected node type ' + ast.type);
      break;
  }
  after && after(ast);
};