prefer-spy-on - Cannot read property 'type' of undefined

[lukeapage]

TypeError: Cannot read property 'type' of undefined
  at getJestFnCall (C:\git\test\node_modules\eslint-plugin-jest\rules\prefer-spy-on.js:13:11)
  at AssignmentExpression (C:\git\test\node_modules\eslint-plugin-jest\rules\prefer-spy-on.js:35:28)

error is in here:

const getJestFnCall = node => {
  if (node.type !== 'CallExpression' && node.type !== 'MemberExpression') {
    return null;
  }

  const obj = node.callee ? node.callee.object : node.object;
  
  if (!obj) {
      console.log(node);
  }

  if (obj.type === 'Identifier') {
    return node.type === 'CallExpression' &&
      getNodeName(node.callee) === 'jest.fn'
      ? node
      : null;
  }

  return getJestFnCall(obj);
};

(edited with a console log)
which outputs:

Node {
  type: 'CallExpression',
  start: 5918,
  end: 5937,
  loc:
   SourceLocation {
     start: Position { line: 158, column: 35 },
     end: Position { line: 158, column: 54 } },
  range: [ 5918, 5937 ],
  callee:
   Node {
     type: 'Identifier',
     start: 5918,
     end: 5932,
     loc:
      SourceLocation {
        start: [Object],
        end: [Object],
        identifierName: 'mockTradeModel' },
     range: [ 5918, 5932 ],
     name: 'mockTradeModel',
     _babelType: 'Identifier',
     parent: [Circular] },
  arguments:
   [ Node {
       type: 'Literal',
       start: 5933,
       end: 5936,
       loc: [Object],
       range: [Array],
       value: 500,
       raw: '500',
       _babelType: 'Literal',
       parent: [Circular] } ],
  _babelType: 'CallExpression',
  parent:
   Node {
     type: 'AssignmentExpression',
     start: 5895,
     end: 5937,
     loc: SourceLocation { start: [Object], end: [Object] },
     range: [ 5895, 5937 ],
     operator: '=',
     left:
      Node {
        type: 'MemberExpression',
        start: 5895,
        end: 5915,
        loc: [Object],
        range: [Array],
        object: [Object],
        property: [Object],
        computed: false,
        leadingComments: null,
        _babelType: 'MemberExpression',
        parent: [Circular] },
     right: [Circular],
     leadingComments: null,
     _babelType: 'AssignmentExpression',
     parent:
      Node {
        type: 'ExpressionStatement',
        start: 5895,
        end: 5938,
        loc: [Object],
        range: [Array],
        expression: [Circular],
        leadingComments: [Array],
        trailingComments: [Array],
        _babelType: 'ExpressionStatement',
        parent: [Object] } } }

[SimenB]

🎉 This issue has been resolved in version 21.27.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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