openjpeg: enable tests

pkgs/development/libraries/openjpeg/generic.nix

@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, cmake, pkgconfig
-, libpng, libtiff, lcms2
+, libpng, libtiff, lcms2, jpylyzer
 , mj2Support ? true # MJ2 executables
 , jpwlLibSupport ? true # JPWL library & executables
 , jpipLibSupport ? false # JPIP library & executables
@@ -8,7 +8,7 @@
 , openjpegJarSupport ? false # Openjpeg jar (Java)
 , jp3dSupport ? true # # JP3D comp
 , thirdPartySupport ? false # Third party libraries - OFF: only build when found, ON: always build
-, testsSupport ? false
+, testsSupport ? true
 , jdk ? null
 # Inherit generics
 , branch, version, revision, sha256, patches ? [], extraFlags ? [], ...
@@ -62,6 +62,13 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ libpng libtiff lcms2 ];
 
+  doCheck = testsSupport;
+  checkPhase = ''
+    substituteInPlace ../tools/ctest_scripts/travis-ci.cmake \
+      --replace "JPYLYZER_EXECUTABLE=" "JPYLYZER_EXECUTABLE=\"${jpylyzer}/bin/jpylyzer\" # "
+    OPJ_SOURCE_DIR=.. ctest -S ../tools/ctest_scripts/travis-ci.cmake
+  '';
+
   passthru = {
     incDir = "openjpeg-${branch}";
   };