In this task you will be working on a C++ File and coding it according to given task. The main motive of this task is to make you familiar with:

• Git and GitHub
• C++
• Standard Template Library (STL)

Follow the following steps to setup this project.

First of all, click on the top-right corner of this repository to fork it.

Then, clone your forked repository using this command:

git clone https://github.com/YOUR-USERNAME/Multiverse-CPP.git

Change your current directory to the repo's root.

cd Multiverse-CPP

Go through the tasks in src folder and

Then you can finally test your submission by running this command from root folder.

make

• Follow the instructions to setup this project.
• Complete the task by making the required changes in the files.
• When done, commit your work locally and push it to your origin (forked repository).
• Make a pull request to our repository, stating the tasks which you have completed.
• Let us review your pull request.

Suppose we have a factorial() function that we want to test:

int factorial(int number) { return number <= 1 ? number : factorial(number - 1) * number; }

A complete compiling example with a self-registering test looks like this:

#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include "test/doctest.h"

int factorial(int number) { return number <= 1 ? number : factorial(number - 1) * number; }

TEST_CASE("testing the factorial function") {
    CHECK(factorial(1) == 1);
    CHECK(factorial(2) == 2);
    CHECK(factorial(3) == 6);
    CHECK(factorial(10) == 3628800);
}

This will compile to a complete executable which responds to command line arguments. If you just run it with no arguments it will execute all test cases (in this case - just one), report any failures, report a summary of how many tests passed and failed and returns 0 on success and 1 if anything failed (useful if you just want a yes/no answer to: "did it work").

If you run this as written it will pass. Everything is good. Right? Well there is still a bug here. We missed to check if factorial(0) == 1 so lets add that check as well:

TEST_CASE("testing the factorial function") {
    CHECK(factorial(0) == 1);
    CHECK(factorial(1) == 1);
    CHECK(factorial(2) == 2);
    CHECK(factorial(3) == 6);
    CHECK(factorial(10) == 3628800);
}

Now we get a failure - something like:

test.cpp(7) FAILED!
  CHECK( factorial(0) == 1 )
with expansion:
  CHECK( 0 == 1 )