Add coverage example

chapter07/coverage_example/CMakeLists.txt

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+# CMakeLists file for the Chapter 7. Example to show how to create a custom build type for a coverage build
+#
+# SPDX-License-Identifier: MIT
+
+cmake_minimum_required(VERSION 3.23)
+
+project(
+    "ch7_coverage_example"
+    VERSION 1.0
+    DESCRIPTION "A simple C++ project to demonstrate generating coverage information"
+    LANGUAGES CXX)
+#include CTest module for defining tests later
+include(CTest)
+
+
+# Add an example library and executable to illustrate the coverage report
+add_library(ch7_coverage_example STATIC)
+target_include_directories(ch7_coverage_example PUBLIC include)
+target_compile_features(ch7_coverage_example PUBLIC cxx_std_11)
+target_sources(ch7_coverage_example PRIVATE src/coverage_example/coverage_example.cpp)
+
+
+add_executable(ch7_coverage_example_test src/coverage_test.cpp)
+target_link_libraries(ch7_coverage_example_test ch7_coverage_example)
+
+target_compile_features(ch7_coverage_example_test PRIVATE cxx_std_17)
+add_test(NAME code_coverage_test COMMAND ch7_coverage_example_test)

chapter07/coverage_example/include/coverage_example/coverage_example.h

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+#pragma once
+
+#include <vector>
+
+namespace coverage_example
+{
+    /// this function checks if a number is dividable by the prime numbers between
+    /// 1 and 10 and returns the prime numbers as vcector
+    std::vector<int> check_for_divisibilty(int i);
+
+} // namespace coverage_example

chapter07/coverage_example/src/coverage_example/coverage_example.cpp

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+#include <coverage_example/coverage_example.h>
+#include <vector>
+
+namespace coverage_example {
+std::vector<int> check_for_divisibilty(int i) {
+
+  std::vector<int> result;
+
+  if (i % 2 == 0) {
+    result.push_back(2);
+  }
+  if (i % 3 == 0) {
+    result.push_back(3);
+  }
+  if (i % 5 == 0) {
+    result.push_back(5);
+  }
+  if (i % 7 == 0) {
+    result.push_back(7);
+  }
+
+  return result;
+}
+
+} // namespace coverage_example

chapter07/coverage_example/src/coverage_test.cpp

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+#include <vector>
+#include <algorithm>
+
+#include <coverage_example/coverage_example.h>
+#include <cassert>
+
+int main(int, char **) {
+
+ auto result = coverage_example::check_for_divisibilty(15); 
+ assert(std::find(result.begin(), result.end(), 2) == result.end());
+ assert(std::find(result.begin(), result.end(), 3) != result.end());
+ assert(std::find(result.begin(), result.end(), 5) != result.end());
+ assert(std::find(result.begin(), result.end(), 7) == result.end());
+
+  return 0;
+}