Add a new network_required switch. Right now it is coincident with git_required, but in the future they might diverge, for example if a git test runs on local data

Signed-off-by: Gianfranco Costamagna <[email protected]>

Author: Gianfranco Costamagna

README.md

@@ -1883,8 +1883,10 @@ json/tests/src/make_test_data_available.hpp:23: FATAL ERROR: REQUIRE( utils::che
 
 In case you have downloaded the library rather than checked out the code via Git, test `cmake_fetch_content_configure` will fail. Please execute `ctest -LE git_required` to skip these tests. See [issue #2189](https://github.com/nlohmann/json/issues/2189) for more information.
 
+Some tests are requiring network to be properly execute. They are labeled as `network_required`. Please execute `ctest -LE network_required` to skip these tests. See [issue #4851](https://github.com/nlohmann/json/issues/4851) for more information.
+
 Some tests change the installed files and hence make the whole process not reproducible. Please execute `ctest -LE not_reproducible` to skip these tests. See [issue #2324](https://github.com/nlohmann/json/issues/2324) for more information. Furthermore, assertions must be switched off to ensure reproducible builds (see [discussion 4494](https://github.com/nlohmann/json/discussions/4494)).
 
-Note you need to call `cmake -LE "not_reproducible|git_required"` to exclude both labels. See [issue #2596](https://github.com/nlohmann/json/issues/2596) for more information.
+Note you need to call `cmake -LE "git_required|not_reproducible|network_required"` to exclude labels. See [issue #2596](https://github.com/nlohmann/json/issues/2596) for more information.
 
 As Intel compilers use unsafe floating point optimization by default, the unit tests may fail. Use flag [`/fp:precise`](https://www.intel.com/content/www/us/en/docs/cpp-compiler/developer-guide-reference/2021-8/fp-model-fp.html) then.

tests/cmake_fetch_content/CMakeLists.txt

@@ -12,10 +12,10 @@ if (${CMAKE_VERSION} VERSION_GREATER "3.11.0")
   )
   set_tests_properties(cmake_fetch_content_configure PROPERTIES
     FIXTURES_SETUP cmake_fetch_content
-    LABELS "git_required;not_reproducible"
+    LABELS "git_required;not_reproducible;network_required"
   )
   set_tests_properties(cmake_fetch_content_build PROPERTIES
     FIXTURES_REQUIRED cmake_fetch_content
-    LABELS "git_required;not_reproducible"
+    LABELS "git_required;not_reproducible;network_required"
   )
 endif()

tests/cmake_fetch_content2/CMakeLists.txt

@@ -12,10 +12,10 @@ if (${CMAKE_VERSION} VERSION_GREATER "3.14.0")
   )
   set_tests_properties(cmake_fetch_content2_configure PROPERTIES
     FIXTURES_SETUP cmake_fetch_content2
-    LABELS "git_required;not_reproducible"
+    LABELS "git_required;not_reproducible;network_required"
   )
   set_tests_properties(cmake_fetch_content2_build PROPERTIES
     FIXTURES_REQUIRED cmake_fetch_content2
-    LABELS "git_required;not_reproducible"
+    LABELS "git_required;not_reproducible;network_required"
   )
 endif()