Add a minimal test program for the C API. (thestk#256)

CMakeLists.txt

@@ -5,7 +5,7 @@
 cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
 
 # Define a C++ project.
-project(RtMidi LANGUAGES CXX)
+project(RtMidi LANGUAGES CXX C)
 
 # standards version
 set(CMAKE_CXX_STANDARD 11)
@@ -200,6 +200,7 @@ target_link_libraries(rtmidi PUBLIC ${PUBLICLINKLIBS}
 include(GNUInstallDirs)
 
 # Add tests if requested.
+option(RTMIDI_BUILD_TESTING "Build test programs" ON)
 if (NOT DEFINED RTMIDI_BUILD_TESTING OR RTMIDI_BUILD_TESTING STREQUAL "")
   set(RTMIDI_BUILD_TESTING ${BUILD_TESTING})
 endif()
@@ -212,8 +213,9 @@ if (RTMIDI_BUILD_TESTING)
   add_executable(qmidiin    tests/qmidiin.cpp)
   add_executable(sysextest  tests/sysextest.cpp)
   add_executable(apinames   tests/apinames.cpp)
+  add_executable(testcapi   tests/testcapi.c)
   list(GET LIB_TARGETS 0 LIBRTMIDI)
-  set_target_properties(cmidiin midiclock midiout midiprobe qmidiin sysextest apinames
+  set_target_properties(cmidiin midiclock midiout midiprobe qmidiin sysextest apinames testcapi
     PROPERTIES RUNTIME_OUTPUT_DIRECTORY tests
                INCLUDE_DIRECTORIES ${CMAKE_CURRENT_SOURCE_DIR}
                LINK_LIBRARIES ${LIBRTMIDI})

tests/Makefile.am

@@ -1,7 +1,9 @@
 
-noinst_PROGRAMS = midiprobe midiout qmidiin cmidiin sysextest midiclock_in midiclock_out apinames
+noinst_PROGRAMS = midiprobe midiout qmidiin cmidiin sysextest midiclock_in midiclock_out	\
+	apinames testcapi
 
 AM_CXXFLAGS = -Wall -I$(top_srcdir)
+AM_CFLAGS = -Wall -I$(top_srcdir)
 
 midiprobe_SOURCES = midiprobe.cpp
 midiprobe_LDADD = $(top_builddir)/librtmidi.la
@@ -27,6 +29,9 @@ midiclock_out_LDADD = $(top_builddir)/librtmidi.la
 apinames_SOURCES = apinames.cpp
 apinames_LDADD = $(top_builddir)/librtmidi.la
 
+testcapi_SOURCES = testcapi.c
+testcapi_LDADD = $(top_builddir)/librtmidi.la
+
 EXTRA_DIST = cmidiin.dsp midiout.dsp midiprobe.dsp qmidiin.dsp	\
 	sysextest.dsp RtMidi.dsw
 

tests/testcapi.c

@@ -0,0 +1,26 @@
+
+#include <stdio.h>
+#include "rtmidi_c.h"
+
+/* Test that the C API for RtMidi is working. */
+
+struct RtMidiWrapper *midiin;
+struct RtMidiWrapper *midiout;
+
+int main() {
+    if ((midiin = rtmidi_in_create_default())) {
+        unsigned int ports = rtmidi_get_port_count(midiin);
+        printf("MIDI input ports found: %u\n", ports);
+        rtmidi_close_port(midiin);
+        rtmidi_in_free(midiin);
+    }
+
+    if ((midiout = rtmidi_out_create_default())) {
+        unsigned int ports = rtmidi_get_port_count(midiout);
+        printf("MIDI output ports found: %u\n", ports);
+        rtmidi_close_port(midiout);
+        rtmidi_out_free(midiout);
+    }
+
+    return 0;
+}