* Remove potential false positive assertions
querySelector() returns null but
expect(document.querySelector('...')).toBeDefined()
tests that the value is not undefined
* Migrated assertions from .toBeDefined() to .not.toBeNull() for .getInstance() calls in tests
* Migrate offcanvas assertions from .toBeDefined() to .not.toBeNull() for .getInstance() call
* convert more cases to not.toBeNull assertions
Co-authored-by: XhmikosR <xhmikosr@gmail.com>
* Change from Error to TypeError
* Convert the `NAME` to upper case to make the consistency in the error message
* Update the remaining tests to be stricter
Co-authored-by: XhmikosR <xhmikosr@gmail.com>