public class TestBag
1: import java.util.Arrays;
2: import java.util.NoSuchElementException;
4: public class TestBag {
6: public static void main(String[] args) {
7: // test constructor
8: Bag<Integer> numbers = new ArrayBag<>(10);
10: // test size/isEmpty/getFrequency/contains
11: testOthers(numbers);
13: // test add
14: for (int i = 0; i < 12; ++i) {
15: if (numbers.add(i)) {
16: System.out.println("Added " + i);
17: } else {
18: System.out.println("Failed to add " + i);
19: }
20: }
22: // test toString
23: System.out.println(numbers);
25: // test toArray(...)
26: testArray(numbers);
28: // test size/isEmpty/getFrequency/contains
29: numbers.add(6);
30: testOthers(numbers);
32: // test remove(T)
33: for (int i = 0; i < 20; i += 3) {
34: if (numbers.remove(i)) {
35: System.out.println("Removed " + i);
36: } else {
37: System.out.println("Failed to remove " + i);
38: }
39: }
40: System.out.println(numbers);
42: // test size/isEmpty/getFrequency/contains
43: testOthers(numbers);
45: // test remove()
46: try {
47: while (true) {
48: System.out.println("Removing " + numbers.remove());
49: }
50: } catch (NoSuchElementException nsee) {
51: System.out.println("No more to remove!");
52: }
53: System.out.println(numbers);
55: // test size/isEmpty/getFrequency/contains
56: testOthers(numbers);
57: }
59: private static void testArray(Bag<Integer> bag) {
60: // toArray()
61: Object[] numbers = bag.toArray();
62: System.out.println(bag + ".toArray() == " + Arrays.toString(numbers));
64: // toArray(T[]) -- big array
65: Integer[] big = new Integer[20];
66: Arrays.fill(big, -1);
67: System.out.println("Array 'big' before: " + Arrays.toString(big));
68: Integer[] returnedBig = bag.toArray(big);
69: System.out.println(bag + ".toArray(big) == "
70: + Arrays.toString(returnedBig));
71: System.out.println("Array 'big' after: " + Arrays.toString(big));
73: // toArray(T[]) -- small array
74: Integer[] small = new Integer[2];
75: Arrays.fill(small, -1);
76: System.out.println("Array 'small' before: " + Arrays.toString(small));
77: Integer[] returnedSmall = bag.toArray(small);
78: System.out.println(bag + ".toArray(small) == "
79: + Arrays.toString(returnedSmall));
80: System.out.println("Array 'small' after: " + Arrays.toString(small));
81: }
83: private static void testOthers(Bag<Integer> bag) {
84: System.out.println(bag + ".size() == " + bag.size());
85: System.out.println(bag + ".isEmpty() == " + bag.isEmpty());
86: System.out.println(bag + ".contains(6) == " + bag.contains(6));
87: System.out.println(bag + ".contains(7) == " + bag.contains(7));
88: System.out.println(bag + ".getFrequency(6) == " + bag.getFrequency(6));
89: System.out.println(bag + ".getFrequency(7) == " + bag.getFrequency(7));
90: }
92: }