Asserting with Boost.Test

A test case contains one or more tests. The Boost.Test library provides a series of APIs in the form of macros to write tests. In the previous recipe, you learned a bit about the BOOST_TEST macro, which is the most important and widely used macro in the library. In this recipe, we will discuss how the BOOST_TEST macro can be used in further detail.

Getting ready

You should now be familiar with writing test suites and test cases, a topic we covered in the previous recipe.

How to do it...

The following list shows some of the most commonly used APIs for performing tests:

• BOOST_TEST, in its plain form, is used for most tests:

  int a = 2, b = 4;
  BOOST_TEST(a == b);
  BOOST_TEST(4.201 == 4.200);
  std::string s1{ "sample" };
  std::string s2{ "text" };
  BOOST_TEST(s1 == s2, "not equal");
  

• BOOST_TEST, along with the tolerance() manipulator, is used to indicate the tolerance of floating-point comparisons...