Test some basic search interactions.

This test is collection dependant.

 * Types in "i", "in", "info"
 * Simulates <backspace>, <backspace>, <backspace>, <backspace> by typing "inf", "in", "i", ""
 (because other browsers than Firefox don't support backspace)
 * Checks all significants page elements (like hits_title, subtitle etc.) for existence / no existence
 * Verifies the content of these page elements.