Checker

Helper library that helps assert assumptions in the code. This helps to declare all assumption explicitly and continue to write code based on specified assumptions.

For example:

• Assert string argument assumption:

void DoSomething(string name)
{
  // This code line will throw ArgumentException exception if assumption failed
  Check.ArgumentIsNullOrWhiteSpace(name, nameof(name));
  ...
}

• Assert class type argument assumption:

void DoSomething(Person person)
{
  // This code line will throw ArgumentNullException exception if assumption failed
  Check.ArgumentIsNull(person, nameof(person));
  ...
}

• Assert custom argument assumption:

void DoSomething(decimal price)
{
  // This code line will throw ArgumentException exception if assumption failed
  Check.Argument(price > 0, "price > 0");
  ...
}

• Assert custom assumption:

void DoSomething()
{
    var response = CallApi();

    // This code line will throw InvalidOperationException exception if assumption failed
    Check.Assert(response != null, "response != null");
  ...
}