@Test
public void pushThreeStringsThenPeekTop() {
ss.push("Jim");
ss.push("Tim");
ss.push("Ben");
assertEquals("Ben", ss.peek());
}
@Test
public void UTC_01() {
StringStack obj = new StringStack(-3);
assertTrue(obj.push("string1"));
assertTrue(obj.push("string2"));
assertTrue(obj.push("string3"));
assertFalse(obj.push("string4"));
}
public void testsAddingElementsToStack() {
ss.push("1");
assertEquals("1", ss.peek());
ss.push("2");
assertEquals("2", ss.peek());
ss.push("3");
assertEquals("3", ss.peek());
}
@Test
public void UTC_03() {
StringStack obj = new StringStack(2);
assertTrue(obj.push("string1"));
assertFalse(obj.push(null));
assertFalse(obj.push(null));
assertTrue(obj.push("string2"));
assertFalse(obj.push("string3"));
}
@Test
public void UTC_06() {
StringStack obj = new StringStack(1);
assertTrue(obj.push("string1"));
assertNotNull(obj.pop());
assertNull(obj.pop());
assertTrue(obj.push("string1"));
assertNotNull(obj.pop());
assertNull(obj.pop());
}
@Test
public void testsLookingAtTopElement() {
assertEquals(null, ss.peek());
ss.push("1");
assertEquals(ss.peek(), "1");
assertTrue(ss.isEmpty() == false);
ss.push("2");
assertEquals(ss.peek(), "2");
ss.push("3");
assertEquals(ss.peek(), "3");
}
@Test
public void testsRemovingAnElementFromStack() {
ss.push("1");
ss.push("2");
ss.push("3");
assertTrue(ss.isEmpty() == false);
assertEquals("3", ss.pop());
assertEquals("2", ss.peek());
assertEquals("2", ss.pop());
assertEquals("1", ss.peek());
assertEquals("1", ss.pop());
assertEquals(null, ss.peek());
assertTrue(ss.isEmpty() == true);
assertEquals(null, ss.pop());
}
@Test
public void pushTwoStringsThenPopOne() {
ss.push("Jim");
ss.push("Tim");
assertEquals(ss.pop(), "Tim");
assertEquals(ss.peek(), "Jim");
}
@Test
public void pushTwoStringsThenPopTwo() {
ss.push("Jim");
ss.push("Tim");
assertEquals(ss.pop(), "Tim");
assertEquals(ss.pop(), "Jim");
assertTrue(ss.isEmpty());
}
@Test
public void pushOneStringThenPopOne() {
ss.push("Jim");
assertFalse(ss.isEmpty());
assertEquals(ss.pop(), "Jim");
assertNull(ss.peek());
assertTrue(ss.isEmpty());
}
@Test
public void pushOneStringThenPeek() {
ss.push("1");
assertEquals("1", ss.peek());
}