CPP-Stack/test/test_stack.cpp

#include "stack.h"
#include <catch2/catch_test_macros.hpp>

TEST_CASE("Test push 3 items into stack.", "[stack]") {
    Stack<int> stack = {};

    REQUIRE(stack.size() == 0);

    stack.push(80);
    REQUIRE(stack.size() == 1);
    REQUIRE(stack.peek() == 80);
    
    stack.push(90);
    REQUIRE(stack.size() == 2);
    REQUIRE(stack.peek() == 90);

    stack.push(60);
    REQUIRE(stack.size() == 3);
    REQUIRE(stack.peek() == 60);
}

TEST_CASE("Test push 3 items and poping them.", "[stack]") {
    Stack<int> stack = {};

    REQUIRE(stack.size() == 0);

    stack.push(80);
    REQUIRE(stack.size() == 1);
    REQUIRE(stack.peek() == 80);
    
    stack.push(90);
    REQUIRE(stack.size() == 2);
    REQUIRE(stack.peek() == 90);

    stack.push(60);
    REQUIRE(stack.size() == 3);
    REQUIRE(stack.peek() == 60);

    int return_val;
    return_val = stack.pop().value();
    REQUIRE(stack.size() == 2);
    REQUIRE(return_val == 60);

    return_val = stack.pop().value();
    REQUIRE(stack.size() == 1);
    REQUIRE(return_val == 90);

    return_val = stack.pop().value();
    REQUIRE(stack.size() == 0);
    REQUIRE(return_val == 80);

}