All tests done, just need the documentation and report

test/test_stack.cpp

@@ -0,0 +1,52 @@
+#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);
+
+}