function guessTests (zone) {
	var mostPopulatedInOffset = helpers.getGuessResult(zone.name, { offset: true });
	var mostPopulatedInAbbr = helpers.getGuessResult(zone.name, { abbr: true });
	var tests = '';
	if (mostPopulatedInOffset === zone.name) {
		tests += '\t"guess:by:offset" : helpers.makeTestGuess("' + zone.name + '", { offset: true }),\n\n';
	} else if (mostPopulatedInOffset) {
		tests += '\t"guess:by:offset" : helpers.makeTestGuess("' + zone.name + '", { offset: true, expect: "' + mostPopulatedInOffset + '" }),\n\n';
	}
	if (mostPopulatedInAbbr === zone.name) {
		tests += '\t"guess:by:abbr" : helpers.makeTestGuess("' + zone.name + '", { abbr: true }),\n\n';
	} else if (mostPopulatedInAbbr) {
		tests += '\t"guess:by:abbr" : helpers.makeTestGuess("' + zone.name + '", { abbr: true, expect: "' + mostPopulatedInAbbr + '" }),\n\n';
	}
	return tests;
}
Creates two guess tests for a timezone, guess:by:offset and guess:by:abbr