Fix tests

The "only 4 tests that try to git clone fail" comment is wrong, most of the
91 tests fail fetching data;  nlohmann/json#2202
from 2020 added an option to use prefetched test data and skip git usage,
so do that and have 87/87 tests pass (on amd64).

textproc/nlohmann-json/Makefile

@@ -2,10 +2,11 @@ COMMENT =	JSON for modern C++
 
 # the "release" contain only json.hpp, and we want tests and CMake config file
 V =		3.11.2
-GH_ACCOUNT =	nlohmann
-GH_PROJECT =	json
-GH_TAGNAME =	v${V}
-DISTNAME =	nlohmann-json-${V}
+DIST_TUPLE =	github	nlohmann	json	v${V}	.
+PKGNAME =	nlohmann-json-${V}
+
+TEST_DATA_DIR =	tests/test_data
+DIST_TUPLE +=	github	nlohmann	json_test_data	v3.1.0	${TEST_DATA_DIR}
 
 CATEGORIES =	devel textproc
 
@@ -19,10 +20,17 @@ COMPILER =		base-clang ports-gcc
 
 MODULES =		devel/cmake
 
+CONFIGURE_ARGS =	-DJSON_TestDataDirectory=${WRKSRC}/${TEST_DATA_DIR}
+
 # only tests are built, defer compilation to running tests
 NO_BUILD =		Yes
-# only 4 tests that try to git clone fail
+
 pre-test:
 	@${MODCMAKE_BUILD_TARGET}
 
+# overwrite target, devel/cmake MODULE cannot pass ctest(1) arguments
+do-test:
+	# skip known to tail tests
+	@${MODCMAKE_TEST_TARGET} -LE git_required
+
 .include <bsd.port.mk>

textproc/nlohmann-json/distinfo

@@ -1,2 +1,4 @@
-SHA256 (nlohmann-json-3.11.2.tar.gz) = 1p+d62p14lgEZcbExREbicTcL6lOOoX80v/NmhQ9knM=
-SIZE (nlohmann-json-3.11.2.tar.gz) = 8097673
+SHA256 (nlohmann-json-v3.11.2.tar.gz) = 1p+d62p14lgEZcbExREbicTcL6lOOoX80v/NmhQ9knM=
+SHA256 (nlohmann-json_test_data-v3.1.0.tar.gz) = iEseIfOM/WpiwVnxt+Co9RaK5dqqOE7U3AwPpmYPIb0=
+SIZE (nlohmann-json-v3.11.2.tar.gz) = 8097673
+SIZE (nlohmann-json_test_data-v3.1.0.tar.gz) = 115036393