feat(mock-doc): add pathname to mock anchors

[tricki]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Unit tests (npm test) were run locally and passed
• E2E Tests (npm run test.karma.prod) were run locally and passed
• Prettier (npm run prettier) was run locally and passed

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

MockAnchorElements don't have a pathname property.

GitHub Issue Number: #2969

What is the new behavior?

The pathname is generated based on the href and returned.

Does this introduce a breaking change?

• Yes
• No

Testing

I wasn't able to run the E2E tests because it couldn't connect to Edge.

Other information

[rwaskiewicz]

Thanks for this! I had two minor nitpicks, otherwise this looks good to me

CI is failing right now - unfortunately that's a flaky e2e test. No action required on your part there

[rwaskiewicz]

Thanks!