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package cgeo.geocaching;
import cgeo.geocaching.utils.LazyInitializedList;
import android.test.AndroidTestCase;
import java.util.LinkedList;
import java.util.List;
public class LazyInitialilzedListTest extends AndroidTestCase {
private static final int MAKE_NULL = -1;
private static final int MAKE_EXCEPTION = -2;
private static class MyList extends LazyInitializedList<Integer> {
private int counter;
MyList(int counter) {
this.counter = counter;
}
@Override
public List<Integer> call() {
if (counter == MAKE_NULL) {
return null;
}
if (counter == MAKE_EXCEPTION) {
throw new RuntimeException("exception in call()");
}
final List<Integer> result = new LinkedList<Integer>();
for (int i = 0; i < counter; i++) {
result.add(counter);
}
counter += 1;
return result;
}
int getCounter() {
return counter;
}
}
public static void testCallOnce() {
final MyList l = new MyList(0);
assertEquals("call() must not called prematurely", 0, l.getCounter());
l.size();
assertEquals("call() must be called when needed", 1, l.getCounter());
l.size();
assertEquals("call() must be called only once", 1, l.getCounter());
}
public static void testSize() {
final MyList l = new MyList(3);
assertEquals("completed size must be identical to call() result", 3, l.size());
}
public static void testValue() {
final MyList l = new MyList(1);
assertEquals("value must be identical to call() result", Integer.valueOf(1), l.get(0));
}
public static void testNull() {
final MyList l = new MyList(MAKE_NULL);
assertEquals("null returned by call() must create an empty list", 0, l.size());
}
public static void testException() {
final MyList l = new MyList(MAKE_EXCEPTION);
assertEquals("exception in call() must create an empty list", 0, l.size());
}
}
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