From 1172c99c506ed4c3c7c8f47d3b51fb195eca5d96 Mon Sep 17 00:00:00 2001
From: Shamrock Lee <44064051+ShamrockLee@users.noreply.github.com>
Date: Wed, 8 Sep 2021 02:30:30 +0800
Subject: [PATCH] nlohmann_json: enable checkPhase

---
 .../libraries/nlohmann_json/default.nix       | 26 ++++++++++++++-----
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/pkgs/development/libraries/nlohmann_json/default.nix b/pkgs/development/libraries/nlohmann_json/default.nix
index e152c4fa20a8..d8ae8fcaa4ae 100644
--- a/pkgs/development/libraries/nlohmann_json/default.nix
+++ b/pkgs/development/libraries/nlohmann_json/default.nix
@@ -1,7 +1,16 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, cmake
+{ stdenv
+, lib
+, fetchFromGitHub
+, cmake
 }:
-
-stdenv.mkDerivation rec {
+let
+  testData = fetchFromGitHub {
+    owner = "nlohmann";
+    repo = "json_test_data";
+    rev = "v3.0.0";
+    sha256 = "O6p2PFB7c2KE9VqWvmTaFywbW1hSzAP5V42EuemX+ls=";
+  };
+in stdenv.mkDerivation rec {
   pname = "nlohmann_json";
   version = "3.10.2";
 
@@ -17,11 +26,14 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DBuildTests=${if doCheck then "ON" else "OFF"}"
     "-DJSON_MultipleHeaders=ON"
-  ];
+  ] ++ lib.optional doCheck "-DJSON_TestDataDirectory=${testData}";
 
-  # A test cause the build to timeout https://github.com/nlohmann/json/issues/1816
-  #doCheck = stdenv.hostPlatform == stdenv.buildPlatform;
-  doCheck = false;
+  doCheck = stdenv.hostPlatform == stdenv.buildPlatform;
+
+  # skip tests that require git or modify “installed files”
+  preCheck = ''
+    checkFlagsArray+=("ARGS=-LE 'not_reproducible|git_required'")
+  '';
 
   postInstall = "rm -rf $out/lib64";