Docs for how to execute tests

README.md

@@ -112,11 +112,11 @@ If you prefer not to use `fetch_content`, you can download, build, and install t
 
 **Note:** this feature is feasible only if CPR_USE_SYSTEM_CURL is set. (see [#645](https://github.com/libcpr/cpr/pull/645))
 ```Bash
-$ git clone https://github.com/libcpr/cpr.git
-$ cd cpr && mkdir build && cd build
-$ cmake .. -DCPR_USE_SYSTEM_CURL=ON
-$ cmake --build .
-$ sudo cmake --install .
+git clone https://github.com/libcpr/cpr.git
+cd cpr && mkdir build && cd build
+cmake .. -DCPR_USE_SYSTEM_CURL=ON
+cmake --build . --parallel
+sudo cmake --install .
 ```
 In your `CMakeLists.txt`:
 ```cmake
@@ -125,6 +125,16 @@ add_executable(your_target_name your_target_name.cpp)
 target_link_libraries(your_target_name PRIVATE cpr::cpr)
 ```
 
+#### Tests
+`cpr` provides a bunch of tests that can be executed via the following commands.
+```Bash
+git clone https://github.com/libcpr/cpr.git
+cd cpr && mkdir build && cd build
+cmake .. -DCPR_BUILD_TESTS=ON # There are other test related options like 'CPR_BUILD_TESTS_SSL' and 'CPR_BUILD_TESTS_PROXY'
+cmake --build . --parallel
+ctest -VV # -VV is optional since it enables verbose output
+```
+
 ### Bazel
 
 Please refer to [hedronvision/bazel-make-cc-https-easy](https://github.com/hedronvision/bazel-make-cc-https-easy).