@Test
public void testMin() {
Stack<Integer> s1 = new Stack<>();
s1.push(4);
s1.push(2);
s1.push(7);
s1.push(12);
assertEquals(2, (int) s1.min());
}
@Test
public void testCorrectOrder() {
Stack stack = new Stack();
stack.push("first");
stack.push("second");
stack.push("third");
assertThat(stack.pop(), is("third"));
assertThat(stack.pop(), is("second"));
assertThat(stack.pop(), is("first"));
}
@Test
public void testPush() {
// Stack stack = new Stack(5);
Integer i = 0;
stack.push(i);
assertFalse("Stack size = 1", stack.isEmpty());
Stack<Double> stackDouble = new Stack<Double>();
Double f = 0.1;
stackDouble.push(f);
assertFalse("Stack size = 1", stackDouble.isEmpty());
}
@Test
public void testSort() {
Stack<Integer> s1 = new Stack<>();
s1.push(3);
s1.push(1);
s1.push(5);
s1.push(2);
s1.push(8);
s1.push(2);
assertEquals("|315282", s1.toString());
Stack.sort(s1);
assertEquals("|853221", s1.toString());
}
@Test
public void testPushPop() {
// Stack stack = new Stack(5);
stack.push(0);
stack.pop();
assertTrue("Stack is empty", stack.isEmpty());
}
@Test
public void PushNull() {
// Stack stack = new Stack(2);
Integer i = null;
stack.push(i);
assertFalse("Stack size = 1", stack.isEmpty());
}
@Test
public void testTop1() {
// Stack stack = new Stack(2);
int value = 460;
stack.push(value);
int top = stack.top();
assertEquals("Stack value is ok", value, top);
}
@SuppressWarnings("unused")
@Test
public void testTopWithIsEmpty() {
// Stack stack = new Stack(2);
stack.push(0);
int top = stack.top();
assertFalse("Stack size = 1", stack.isEmpty());
}
@Test
public void testPushPop() {
String expected = "Test";
Stack<String> testStack = new Stack<String>();
testStack.push(expected);
String actual = testStack.pop();
assertEquals(expected, actual);
}
@Test
public void testPushPop1Object() {
// Stack stack = new Stack(1);
int test = 155;
stack.push(test);
int pop = stack.pop();
assertEquals("Stack value is the same", test, pop);
}
/** Test of isEmpty method, of class Stack. Stack is not empty. */
@Test
public void testIsEmpty2() {
System.out.println("isEmpty2");
Stack instance = new Stack(1);
instance.push(1);
boolean expResult = false;
boolean result = instance.isEmpty();
assertEquals(expResult, result);
}
/** Test of push and pop method, of class Stack. */
@Test
public void testPop() {
System.out.println("pop");
Stack instance = new Stack(1);
instance.push(1);
int expResult = 1;
int result = instance.pop();
assertEquals(expResult, result);
}
@Test
public void testTopN() {
// Stack stack = new Stack(10);
int values[] = {460, 6, 9, 8, 7, 41, 3, 67, 5};
for (int i = 0; i < values.length; i++) {
stack.push(values[i]);
}
int top = stack.top();
assertEquals("Top value is ok", values[values.length - 1], top);
}
@Test
public void testNTop() {
// Stack stack = new Stack(2);
int value = 460;
int top = 0;
stack.push(value);
for (int i = 0; i < 10; i++) {
top = stack.top();
}
assertEquals("Top value is the same", value, top);
}
@Test
public void testPushPopNTime() {
// Stack stack = new Stack(3);
int value[] = {15641, 99877, 3269710};
int popValue = 0;
for (int i = 0; i < 3; i++) {
stack.push(value[i]);
popValue = stack.pop();
}
assertEquals("Stack value is the same", value[2], popValue);
}
@Test
public void testEmpty() {
Stack<String> testStack = new Stack<String>();
assertTrue(testStack.isEmpty());
String test = "Test";
testStack.push(test);
assertFalse(testStack.isEmpty());
testStack.pop();
assertTrue(testStack.isEmpty());
}
@Test
public void testLiFo() {
String test1 = "Test1";
String test2 = "Test2";
Stack<String> testStack = new Stack<String>();
testStack.push(test1);
testStack.push(test2);
String actual1 = testStack.pop();
String actual2 = testStack.pop();
assertEquals(test2, actual1);
assertEquals(test1, actual2);
}
@Test
public void testBasicFeatures() {
Stack stack = new Stack();
assertTrue(stack.isEmpty());
stack.push("first");
assertFalse(stack.isEmpty());
String peek = stack.peek();
assertThat(peek, is("first"));
assertFalse(stack.isEmpty());
String pop = stack.pop();
assertThat(pop, is("first"));
assertTrue(stack.isEmpty());
}
@Test
public void testTowersOfHanoi() {
Stack<Integer> src = new Stack<>();
Stack<Integer> temp = new Stack<>();
Stack<Integer> dest = new Stack<>();
for (int i = 5; i > 0; i--) {
src.push(i);
}
System.out.println(src.toString());
System.out.println(temp.toString());
System.out.println(dest.toString());
System.out.println();
Stack.towersOfHanoi(5, src, temp, dest);
System.out.println(src.toString());
System.out.println(temp.toString());
System.out.println(dest.toString());
System.out.println();
assertEquals("|54321", dest.toString());
}
@Test(expected = NullPointerException.class)
public void shouldThrowExceptionOnNullInput() {
Stack stack = new Stack();
stack.push(null);
}