@Test
public void testRetrieval() {

	// Two versions of the "retrieval" phase.
	// Version 1: get one pair's value given its key
	// (presumably the key would really come from user input):
	String queryString = "O'Reilly";
	System.out.println("You asked about " + queryString + ".");
	String resultString = (String)map.get(queryString);
	System.out.println("They are located in: " + resultString);
	assertEquals("get test", "Sebastopol, CA", resultString);
}