Classes having one static method or having no methods at all are uncovered

[zsoltvad]

[mezoistvan]

In order to provide test coverage for these lines, we need to create unit tests like this:

it( 'could be instantiated', () => {
	let browserErrors = new BrowserErrors();
	expect( browserErrors instanceof BrowserErrors ).toBe( true );
} );

This should not be the case.