At risk of sounding like I want to bloat the set of custom matchers provided by this lib, I'd like to propose .toHaveClass('dropdown-toggle'). The class attribute in html is designed to have multiple classes encoded in it, and it's often nice to be able to reliably check if an element has a certain class while ignoring the rest of what's encoded in the class attribute value.

// ... // <button data-testid="delete-button" type="submit" class="btn btn-danger"> // Delete item // </button> expect(getByTestId('delete-button')).toHaveClass('btn-danger')

Raising it as an issue first to see if it's considered useful for this lib, and also to discuss potential names:

• toHaveClass
• toIncludeClass
• toContainClass
• something else?

Or all of the above but ending with *ClassName instead of just *Class.