Regression in the getDirectives function

[oalexander]

Issue workflow progress

Progress of the issue based on the
Contributor Workflow

• 1. The issue provides a reproduction available on Github, Stackblitz or CodeSandbox

  Make sure to fork this template and run yarn generate in the terminal.

  Please make sure the GraphQL Tools package versions under package.json matches yours.

• 2. A failing test has been provided
• 3. A local solution has been provided
• 4. A pull request is pending review

---

Describe the bug

It appears that in a recent release of the utils package, there is a regression in the getDirectives function (diff). The new exported function getDirectiveExtensions can cause an undefined error while iterating over an incorrect path. In previous versions, this case was handled.

To Reproduce Steps to reproduce the behavior:

The following code throws an error:

 const objectType = new GraphQLObjectType({
            name: 'TestObject',
            fields: () => ({})
        });
      getDirectiveExtensions(objectType, undefined, ['not', 'a', 'real', 'path'])

Expected behavior

The getDirectiveExtensions (and its callers) should successfully handle an invalid path.

Environment:

• OS:
• @graphql-tools/...:
• NodeJS:

Additional context

[ardatan]

Thanks for the issue! Could you create a PR with a failing test?