Write test class with at least two unit tests that test different cases for the closer() function described below:

Either write a 3rd distinct test case for closer() or explain why 2 cases is enough

class Loc { // (latitude, longitude) - coordinates for location on a map public Loc(float lat, float lon);

}

class Nav {

// Destination

public void setDest(Loc goal);

// return negative value if loc1 is closer to destination than loc2

// positive value if loc2 is closer

// zero if they are equally close to the destination

public int closer(Loc loc1, Loc loc2);

}

class TestNav { // Your test code goes here