hidapi: Add meta.pkgConfigModules and test

pkgs/development/libraries/hidapi/default.nix

@@ -7,16 +7,17 @@
 , udev
 , Cocoa
 , IOKit
+, testers
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "hidapi";
   version = "0.12.0";
 
   src = fetchFromGitHub {
     owner = "libusb";
     repo = "hidapi";
-    rev = "${pname}-${version}";
+    rev = "${finalAttrs.pname}-${finalAttrs.version}";
     sha256 = "sha256-SMhlcB7LcViC6UFVYACjunxsGkvSOKC3mbLBH4XQSzM=";
   };
 
@@ -28,12 +29,20 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = lib.optionals stdenv.isDarwin [ Cocoa IOKit ];
 
+  passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
+
   meta = with lib; {
     description = "Library for communicating with USB and Bluetooth HID devices";
     homepage = "https://github.com/libusb/hidapi";
     maintainers = with maintainers; [ prusnak ];
     # You can choose between GPLv3, BSD or HIDAPI license (even more liberal)
     license = with licenses; [ bsd3 /* or */ gpl3Only ] ;
+    pkgConfigModules = lib.optionals stdenv.isDarwin [
+      "hidapi"
+    ] ++ lib.optionals stdenv.isLinux [
+      "hidapi-hidraw"
+      "hidapi-libusb"
+    ];
     platforms = platforms.unix;
   };
-}
+})