@Test
public void testPeek() {
String el0 = "firstElement0";
String el1 = "firstElement1";
String el2 = "firstElement2";
String el3 = "firstElement3";
CustomStack<String> customStack = new CustomStack<String>();
customStack.push(el0);
assertSame(el0, customStack.peek());
customStack.push(el1);
assertSame(el1, customStack.peek());
customStack.push(el2);
assertSame(el2, customStack.peek());
customStack.push(el3);
assertSame(el3, customStack.peek());
customStack.push(el1);
assertSame(el1, customStack.peek());
customStack.pop();
assertSame(el3, customStack.peek());
customStack.pop();
assertSame(el2, customStack.peek());
customStack.pop();
assertSame(el1, customStack.peek());
customStack.pop();
assertSame(el0, customStack.peek());
}
@Test
public void testSearch() {
String el0 = "firstElement0";
String el1 = "firstElement1";
String el2 = "firstElement2";
String el3 = "firstElement3";
CustomStack<String> customStack = new CustomStack<String>();
customStack.push(el0);
customStack.push(el1);
customStack.push(el2);
customStack.push(el3);
assertSame(3, customStack.search(el0));
assertSame(2, customStack.search(el1));
assertSame(1, customStack.search(el2));
assertSame(0, customStack.search(el3));
assertSame(-1, customStack.search("nonExisting1"));
customStack.push(el3);
customStack.push(el2);
customStack.push(el0);
customStack.push(el1);
assertSame(1, customStack.search(el0));
assertSame(0, customStack.search(el1));
assertSame(2, customStack.search(el2));
assertSame(3, customStack.search(el3));
assertSame(-1, customStack.search("nonExisting2"));
customStack.pop();
customStack.pop();
assertSame(5, customStack.search(el0));
assertSame(4, customStack.search(el1));
assertSame(0, customStack.search(el2));
assertSame(1, customStack.search(el3));
assertSame(-1, customStack.search("nonExisting3"));
customStack.pop();
customStack.pop();
customStack.pop();
customStack.pop();
assertSame(1, customStack.search(el0));
assertSame(0, customStack.search(el1));
assertSame(-1, customStack.search(el2));
assertSame(-1, customStack.search(el3));
}
@Test
public void testIsMepty() {
CustomStack<String> customStack = new CustomStack<String>();
assertTrue(customStack.empty());
customStack.push("element1");
assertFalse(customStack.empty());
customStack.pop();
assertTrue(customStack.empty());
}