CMake: improvements to testing usability

Replace USE_TESTS with BUILD_TESTING variable already exported by CTest.
Use the CMake 3.17 CMAKE_CTEST_ARGUMENTS to pass "-V" to ctest. #651

CMakeLists.txt

@@ -12,6 +12,7 @@ set(CMAKE_CXX_VISIBILITY_PRESET hidden)
 include(GNUInstallDirs)
 
 ###################### USER-SELECTABLE OPTIONS ###########################
+# BUILD_TESTING is defined by CTest
 option(DFSG_BUILD "DFSG build (no non-free media/code)" OFF)
 option(USE_COVERAGE "Assess code coverage with llvm-cov/lcov" OFF)
 option(USE_DOXYGEN "Build HTML cross reference with doxygen" OFF)
@@ -22,7 +23,6 @@ option(USE_QRCODEGEN "Disable libqrcodegen QR code support" ON)
 option(USE_RUST "Build Rust wrappers (experimental)" OFF)
 option(USE_SIXEL "Build Sixel support" OFF)
 option(USE_STATIC "Build static libraries (in addition to shared)" ON)
-option(USE_TESTS "Build doctest unit tests" ON)
 set(USE_MULTIMEDIA "ffmpeg" CACHE STRING "Multimedia engine, one of 'ffmpeg', 'oiio', or 'none'")
 set_property(CACHE USE_MULTIMEDIA PROPERTY STRINGS ffmpeg oiio none)
 set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS Debug Release MinSizeRel RelWithDebInfo Coverage)
@@ -84,7 +84,7 @@ if(NOT "${HAVE_QRCODEGEN_H}")
 endif()
 endif()
 find_library(LIBRT rt)
-if(${USE_TESTS})
+if(${BUILD_TESTING})
 find_package(doctest 2.3.5 REQUIRED)
 endif()
 
@@ -526,10 +526,8 @@ target_compile_definitions(notcurses-view
 endif()
 
 # Testing
-if(${USE_TESTS})
-if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
-  include(CTest)
-endif()
+include(CTest)
+if(${BUILD_TESTING})
 file(GLOB TESTSRCS CONFIGURE_DEPENDS tests/*.cpp)
 add_executable(notcurses-tester ${TESTSRCS})
 target_include_directories(notcurses-tester
@@ -543,7 +541,8 @@ target_link_libraries(notcurses-tester
     notcurses++
     "${TERMINFO_LIBRARIES}"
 )
-
+# sadly, this doesn't take effect until CMake 3.17...
+set(CMAKE_CTEST_ARGUMENTS "-V")
 enable_testing()
 add_test(
   NAME notcurses-tester
@@ -688,7 +687,7 @@ install(PROGRAMS src/pydemo/notcurses-pydemo DESTINATION bin)
 install(TARGETS notcurses-demo DESTINATION bin)
 install(TARGETS notcurses-input DESTINATION bin)
 install(TARGETS notcurses-ncreel DESTINATION bin)
-if(${USE_TESTS})
+if(${BUILD_TESTING})
 install(TARGETS notcurses-tester DESTINATION bin)
 endif()
 install(TARGETS notcurses-tetris DESTINATION bin)

README.md

@@ -131,9 +131,13 @@ or `none`. Without a multimedia engine, Notcurses will be unable to decode
 images and videos.
 
 Run unit tests with `make test` following a successful build. If you have unit
-test failures, *please* file a bug including the output of `./notcurses-tester
-> log 2>&1` (`make test` also runs `notcurses-tester`, but hides important
-output). Install with `make install` following a successful build.
+test failures, *please* file a bug including the output of
+
+`./notcurses-tester -p ../data`
+
+(`make test` also runs `notcurses-tester`, but hides important output).
+
+Install with `make install` following a successful build.
 
 To watch the bitchin' demo, run `./notcurses-demo -p ../data`. More details can
 be found on the `notcurses-demo(1)` man page.
@@ -144,12 +148,12 @@ To set the C compiler, export `CC`. To set the C++ compiler, export `CXX`. The
 `CMAKE_BUILD_TYPE` CMake variable can be defined to any of its standard values,
 but must be `Debug` for use of `USE_COVERAGE`.
 
+* `BUILD_TESTING`: build `notcurses-tester` using doctest
 * `DFSG_BUILD`: leave out all content considered non-free under the Debian Free
                 Software Guidelines.
 * `USE_MULTIMEDIA`: `ffmpeg` for FFmpeg, `oiio` for OpenImageIO, `none` for none.
 * `USE_QRCODEGEN`: build qrcode support via libqrcodegen
 * `USE_SIXEL`: build Sixel support via libsixel
-* `USE_TESTS`: build `notcurses-tester` using doctest
 * `USE_PANDOC`: build man pages with pandoc
 * `USE_DOXYGEN`: build interlinked HTML documentation with Doxygen
 * `USE_PYTHON`: build the Python wrappers

tests/metric.cpp

@@ -330,7 +330,6 @@ TEST_CASE("Metric") {
     uintmax_t val = 9027854993;
     uintmax_t decimal = GIG;
     REQUIRE(qprefix(val, decimal, buf, 0));
-fprintf(stderr, "%s %s\n", gold, buf);
     CHECK(!strcmp(buf, gold));
   }
 

tests/rotate.cpp

@@ -176,7 +176,6 @@ TEST_CASE("Rotate") {
     for(int i = 0 ; i < height * width / 2 ; ++i){
       if(rgbaret[i] & CELL_BG_MASK){
         CHECK(rgbaret[i] == htonl(rgba[i]));
-fprintf(stderr, "%08x %08x\n", rgbaret[i], htonl(rgba[i]));
       }
     }
     free(rgbaret);