Not really a "test". More of a flowchart with questions.
And most of the people doing the complaining are NOT Europeans — they are other American tech companies (and their lobbyists) whose international businesses have allegedly been screwed over by Google.
This is all too typical of antitrust complaints. The customers don't seem to mind, but the competitors of very successful companies do.
UPDATE: Clyde Wayne Crews, Jr. offers this sharp, concise formulation:
Antitrust is predatory corporate welfare policy. Firms do get large and powerful, but never as large and powerful as governments that collude with rent-seeking firms to forcibly channel customers to the latter.
Antitrust’s goal is to absolve lawyered-up firms of the need to competitively respond to the new market regimes brought into being by the dominant firm; it artificially secures less-competitive firms’ survival by forcibly denying consumers the choices they otherwise would have been free to make.