see PR merged https://gitlab.com/lspies/photoqt/-/merge_requests/44.patch
fix test w/o mpv installed
Amend photoqt_testscripts_SOURCES with SOURCES_LIBMPV, mirroring
photoqt_SOURCES logic.
--- a/CMake/ListFilesTesting.cmake
+++ b/CMake/ListFilesTesting.cmake
@@ -117,9 +117,6 @@ SET(photoqt_testscripts_SOURCES
 ########################################################################
 ########################################################################
 
-                    ../../cplusplus/other/pqc_mpvobject.cpp
-
-                    ../../cplusplus/header/pqc_mpvobject.h
                     ../../cplusplus/header/pqc_imageformats_qml.h
                     ../../cplusplus/header/pqc_filefoldermodel.h
                     ../../cplusplus/header/pqc_metadata.h
@@ -156,4 +153,7 @@ SET(photoqt_testscripts_SOURCES
                     # ../../cplusplus/header/scripts/pqc_scriptschromecast_qml.h
                 )
 
+SET(photoqt_testscripts_SOURCES_LIBMPV ../../cplusplus/other/pqc_mpvobject.cpp
+                                       ../../cplusplus/header/pqc_mpvobject.h)
+
 endif()
--- a/testing/pqt_filefoldermodel/CMakeLists.txt
+++ b/testing/pqt_filefoldermodel/CMakeLists.txt
@@ -81,6 +81,7 @@ if(_WITH_VIDEO_QT)
 endif()
 
 if(_WITH_VIDEO_MPV)
+    SET(photoqt_testscripts_SOURCES ${photoqt_testscripts_SOURCES} ${photoqt_testscripts_SOURCES_LIBMPV})
     target_compile_definitions(${testname} PRIVATE PQMVIDEOMPV)
     target_link_libraries(${testname} PRIVATE Libmpv::Libmpv)
 endif()
--- a/testing/pqt_scriptsclipboard/CMakeLists.txt
+++ b/testing/pqt_scriptsclipboard/CMakeLists.txt
@@ -81,6 +81,7 @@ if(_WITH_VIDEO_QT)
 endif()
 
 if(_WITH_VIDEO_MPV)
+    SET(photoqt_testscripts_SOURCES ${photoqt_testscripts_SOURCES} ${photoqt_testscripts_SOURCES_LIBMPV})
     target_compile_definitions(${testname} PRIVATE PQMVIDEOMPV)
     target_link_libraries(${testname} PRIVATE Libmpv::Libmpv)
 endif()
--- a/testing/pqt_scriptsconfig/CMakeLists.txt
+++ b/testing/pqt_scriptsconfig/CMakeLists.txt
@@ -81,6 +81,7 @@ if(_WITH_VIDEO_QT)
 endif()
 
 if(_WITH_VIDEO_MPV)
+    SET(photoqt_testscripts_SOURCES ${photoqt_testscripts_SOURCES} ${photoqt_testscripts_SOURCES_LIBMPV})
     target_compile_definitions(${testname} PRIVATE PQMVIDEOMPV)
     target_link_libraries(${testname} PRIVATE Libmpv::Libmpv)
 endif()
--- a/testing/pqt_scriptsfiledialog/CMakeLists.txt
+++ b/testing/pqt_scriptsfiledialog/CMakeLists.txt
@@ -81,6 +81,7 @@ if(_WITH_VIDEO_QT)
 endif()
 
 if(_WITH_VIDEO_MPV)
+    SET(photoqt_testscripts_SOURCES ${photoqt_testscripts_SOURCES} ${photoqt_testscripts_SOURCES_LIBMPV})
     target_compile_definitions(${testname} PRIVATE PQMVIDEOMPV)
     target_link_libraries(${testname} PRIVATE Libmpv::Libmpv)
 endif()
--- a/testing/pqt_scriptsfilemanagement/CMakeLists.txt
+++ b/testing/pqt_scriptsfilemanagement/CMakeLists.txt
@@ -81,6 +81,7 @@ if(_WITH_VIDEO_QT)
 endif()
 
 if(_WITH_VIDEO_MPV)
+    SET(photoqt_testscripts_SOURCES ${photoqt_testscripts_SOURCES} ${photoqt_testscripts_SOURCES_LIBMPV})
     target_compile_definitions(${testname} PRIVATE PQMVIDEOMPV)
     target_link_libraries(${testname} PRIVATE Libmpv::Libmpv)
 endif()
--- a/testing/pqt_scriptsfilespaths/CMakeLists.txt
+++ b/testing/pqt_scriptsfilespaths/CMakeLists.txt
@@ -81,6 +81,7 @@ if(_WITH_VIDEO_QT)
 endif()
 
 if(_WITH_VIDEO_MPV)
+    SET(photoqt_testscripts_SOURCES ${photoqt_testscripts_SOURCES} ${photoqt_testscripts_SOURCES_LIBMPV})
     target_compile_definitions(${testname} PRIVATE PQMVIDEOMPV)
     target_link_libraries(${testname} PRIVATE Libmpv::Libmpv)
 endif()
--- a/testing/pqt_scriptsimages/CMakeLists.txt
+++ b/testing/pqt_scriptsimages/CMakeLists.txt
@@ -81,6 +81,7 @@ if(_WITH_VIDEO_QT)
 endif()
 
 if(_WITH_VIDEO_MPV)
+    SET(photoqt_testscripts_SOURCES ${photoqt_testscripts_SOURCES} ${photoqt_testscripts_SOURCES_LIBMPV})
     target_compile_definitions(${testname} PRIVATE PQMVIDEOMPV)
     target_link_libraries(${testname} PRIVATE Libmpv::Libmpv)
 endif()