GenerickStackTest

package Module02;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.jupiter.api.Assertions.*;

class GenericStackTest {
    private GenericStack genericStack;

    @BeforeEach
    void setUp() {
        genericStack = new GenericStack(100);
    }

    @Test
    void sizeMethodShouldReturnCorrectSizeOfArray() {
        GenericStack<String> gsString = new GenericStack<>(100);
        gsString.push("Java");
        gsString.push("er");
        gsString.push("morsomt! :D");
        assertThat(gsString.size(), is(equalTo(3)));
    }
    @Test
    void peekMethodShouldReturnLastElementInArray() {
        GenericStack<String> gsString = new GenericStack<>(100);
        gsString.push("First");
        gsString.push("Second");
        gsString.push("Last");
        assertThat(gsString.peek(), is(equalTo("Last")));
    }
    @Test
    void pushMethodShouldDoubleSizeOfArrayIfArrayIsFullWhenPushing() {
        GenericStack<String> gsString = new GenericStack<>(100);
        for (int i = 0; i < 100; i++) {
            gsString.push("foo");
        }
        gsString.push("Fighters");
        assertThat(gsString.size(), is(equalTo(100 * 2)));
    }
    @Test
    void toStringMethodPrintsCorrectlyWithInteger() {
        GenericStack<Integer> gsInteger = new GenericStack<>(100);
        gsInteger.push(1);
        gsInteger.push(2);
        gsInteger.push(3);
        assertThat(gsInteger.toString(), is(equalTo("[1, 2, 3]")));
    }
    @Test
    void toStringMethodPrintsCorrectlyWithStrings() {
        GenericStack<String> gsString = new GenericStack<>(100);
        gsString.push("One");
        gsString.push("Two");
        gsString.push("Three");
        assertThat(gsString.toString(), is(equalTo("[One, Two, Three]")));
    }
    @Test
    void isEmptyMethodShouldReturnTrueIfElementsIsEmpty() {
        assertTrue(genericStack.isEmpty());
    }
    /*@Test
    void popMethodShouldRemoveLastElementInElements() {
        GenericStack<Integer> gsString = new GenericStack<>(100);
        gsString.push(1);
        gsString.push(2);
        gsString.push(3);
        gsString.push(4);
        gsString.push(5);
        gsString.pop();

    }*/

}