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package com.dataStructures;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import java.util.EmptyStackException;
class StackTest {
@Test
void testEmpty() {
Stack<Integer> myStack = new Stack<>();
boolean isEmpty = myStack.empty();
Assertions.assertTrue(isEmpty);
myStack.push(10);
isEmpty = myStack.empty();
Assertions.assertFalse(isEmpty);
}
@Test
void testPeekWithoutElements() {
Assertions.assertThrows(EmptyStackException.class, () -> {
Stack<Integer> myStack = new Stack<>();
myStack.peek();
});
}
@Test
void testPeekWithElements() {
Stack<Integer> myStack = new Stack<>();
myStack.push(10);
myStack.push(20);
myStack.push(30);
myStack.push(40);
Assertions.assertEquals(40, myStack.peek());
}
@Test
void testPopWithoutElements() {
Assertions.assertThrows(EmptyStackException.class, () -> {
Stack<Integer> myStack = new Stack<>();
myStack.pop();
});
}
@Test
void testPopWithElements() {
Stack<Integer> myStack = new Stack<>();
myStack.push(10);
myStack.push(20);
myStack.push(30);
myStack.push(40);
myStack.push(50);
Assertions.assertEquals(50, myStack.pop());
}
@Test
void testPushWithinInitialCapacity() {
Stack<Integer> myStack = new Stack<>();
myStack.push(10);
myStack.push(20);
myStack.push(30);
myStack.push(40);
myStack.push(50);
myStack.push(60);
myStack.push(70);
myStack.push(80);
myStack.push(90);
myStack.push(100);
Assertions.assertEquals(10, myStack.size());
}
@Test
void testPushOutsideInitialCapacity() {
Stack<Integer> myStack = new Stack<>();
myStack.push(10);
myStack.push(20);
myStack.push(30);
myStack.push(40);
myStack.push(50);
myStack.push(60);
myStack.push(70);
myStack.push(80);
myStack.push(90);
myStack.push(100);
myStack.push(110);
Assertions.assertEquals(11, myStack.size());
}
@Test
void testSearchWithObjectUnavailable() {
Stack<Integer> myStack = new Stack<>();
myStack.push(10);
myStack.push(20);
myStack.push(30);
Assertions.assertEquals(-1, myStack.search(50));
}
@Test
void testSearchWithObjectAvailable() {
Stack<Integer> myStack = new Stack<>();
myStack.push(10);
myStack.push(20);
myStack.push(30);
Assertions.assertEquals(3, myStack.search(10));
}
}