Utility Functions

Utility functions for advanced string handling in tests. More...

Functions
bool	micro_os_plus::micro_test_plus::utility::is_match (std::string_view input, std::string_view pattern)
	Check if a string matches a pattern.
template<class T>
constexpr auto	micro_os_plus::micro_test_plus::mut (const T &t) noexcept -> T &
	Generic mutator to remove const qualification from any type.
template<class T, class Delim_T>
auto	micro_os_plus::micro_test_plus::utility::split (T input, Delim_T delim) -> std::vector< T >
	Split a string into a vector of sub-strings.

Detailed Description

The µTest++ framework includes a collection of utility functions designed to simplify advanced string operations commonly required during test development. These functions support tasks such as partial string matching, splitting long strings for improved readability, and other manipulations that enhance the clarity and effectiveness of test code.

Function Documentation

is_match()

bool micro_os_plus::micro_test_plus::utility::is_match ( std::string_view input, std::string_view pattern )

nodiscard

Parameters

[in]	input	The string view to be checked.
[in]	pattern	The string view containing the pattern to match.

Returns

true if the input string matches the pattern; otherwise, false.

This function enables pattern-based string comparison for tests, supporting both exact matches and wildcard patterns. The pattern may include * to match any sequence of characters and ? to match any single character. This allows for flexible validation of string content in test assertions, accommodating variable or partially known values.

Examples

namespace mt = micro_os_plus::micro_test_plus;
 
mt::expect (mt::utility::is_match ("abc", "a?c")) << "abc matches a?c";
mt::expect (mt::utility::is_match ("abc", "a*c")) << "abc matches a*c";

Definition at line 171 of file micro-test-plus.cpp.

    {
      if (std::empty (pattern))
        {
          return std::empty (input);
        }
 
      if (std::empty (input))
        {
          return pattern[0] == '*' ? is_match (input, pattern.substr (1))
                                   : false;
        }
 
      if (pattern[0] != '?' and pattern[0] != '*' and pattern[0] != input[0])
        {
          return false;
        }
 
      if (pattern[0] == '*')
        {
          for (decltype (std::size (input)) i = 0u; i <= std::size (input);
               ++i)
            {
              if (is_match (input.substr (i), pattern.substr (1)))
                {
                  return true;
                }
            }
          return false;
        }
 
      return is_match (input.substr (1), pattern.substr (1));
    }

References is_match().

Referenced by is_match().

mut()

template<class T>

auto micro_os_plus::micro_test_plus::mut ( const T & t ) -> T&

nodiscardconstexprnoexcept

Template Parameters

T	The type of the input object.

Parameters

[in]

t

The object from which to remove const qualification.

Returns

A non-const reference to the input object.

The mut function template provides a safe and generic mechanism to remove the const qualifier from any type. It returns a non-const reference to the input object, enabling modification of objects that were originally declared as const. This utility is particularly useful in testing scenarios where controlled mutation of test data is required.

Definition at line 321 of file function-comparators-inlines.h.

  {
    return const_cast<T&> (t);
  }

split()

template<class T, class Delim_T>

auto micro_os_plus::micro_test_plus::utility::split ( T input, Delim_T delim ) -> std::vector<T>

nodiscard

Template Parameters

T	Type of the input string.
Delim_T	Type of the delimiter.

Parameters

[in]	input	Input string to split.
[in]	delim	Delimiter string.

Returns

A vector containing the resulting sub-strings.

This function template facilitates string handling in tests by splitting a string into a vector of substrings, using the specified delimiter.

The function iterates through the input string, identifying delimiter positions and extracting substrings between them. Each resulting substring is added to the output vector. This approach supports flexible parsing of delimited data, which is particularly useful for validating string processing logic in test cases.

Example

namespace mt = micro_os_plus::micro_test_plus;
 
mt::expect (std::vector<std::string_view>{ "a", "b" }
            == mt::utility::split<std::string_view> ("a.b", "."))
        << "a.b splits into [a,b]";

Definition at line 275 of file micro-test-plus-inlines.h.

    {
      std::vector<T> output{};
      std::size_t first{};
      while (first < std::size (input))
        {
          const auto second = input.find_first_of (delim, first);
          if (first != second)
            {
              output.emplace_back (input.substr (first, second - first));
            }
          if (second == T::npos)
            {
              break;
            }
          first = second + 1;
        }
      return output;
    }