Added a new ctest case (function availablity test); and integrate exsiting and new test cases for ctest

Author: eklee15

plugins/spank_qrmi/CMakeLists.txt

@@ -111,3 +111,15 @@ target_include_directories(spank_qrmi
 target_compile_options(spank_qrmi
     PRIVATE -Wall -Wextra -Werror -O2 -pedantic -Wconversion -Wwrite-strings -Wfloat-equal
 )
+
+option(BUILD_TESTING "Build the project tests" OFF)
+if(BUILD_TESTING)
+  enable_testing()
+  add_executable(base_test ../tests/metadata/src/test.c)
+  add_test(NAME "Library availability test" COMMAND base_test $<TARGET_FILE:spank_qrmi>)
+  add_executable(unit_test ../tests/unit/src/unit_test.c)
+  add_test(NAME "Symbol(function) availability test" COMMAND unit_test $<TARGET_FILE:spank_qrmi>)
+else()
+    message(STATUS "Tests disabled by option 'BUILD_TESTING' set to OFF")
+endif()
+

plugins/tests/unit/src/unit_test.c

@@ -0,0 +1,69 @@
+/*
+ * This code is part of Qiskit.
+ *
+ * (C) Copyright IBM 2025.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the GNU General Public License version 3, as published by the
+ * Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <[https://www.gnu.org/licenses/gpl-3.0.txt]
+ */
+
+#include <stdio.h>
+#include <dlfcn.h>
+#include <stdlib.h>
+
+typedef void (*generic_func)();
+
+int main(int argc, char** argv)
+{
+    void *handle;
+    char *error;
+ 
+    // List of functions to check
+    const char *functions[] = {
+        "slurm_spank_exit",
+        "slurm_spank_init",
+        "slurm_spank_init_post_opt",
+        "slurm_spank_task_init"};
+    int num_functions = sizeof(functions) / sizeof(functions[0]);
+
+    if (argc != 2) {
+        printf("(Error) Missing argument. Specify path to plugin library file.\n");
+        exit(EXIT_FAILURE);
+    }
+
+    handle = dlopen(argv[1], RTLD_LAZY);
+    if (!handle) {
+        fprintf(stderr, "Could not open %s: %s\n", argv[1], dlerror());
+        exit(EXIT_FAILURE);
+    }
+    //printf("Starting existence tests for %s ...\n", argv[1]);
+
+    for (int i = 0; i < num_functions; i++) {
+        dlerror(); // clear any existing error just in case
+        generic_func func_ptr = (generic_func)dlsym(handle, functions[i]);
+        error = dlerror();
+
+        if (error != NULL) {
+            printf("[FAILED] Function '%s' NOT found. Error: %s\n", functions[i], error);
+            exit(EXIT_FAILURE);
+        } else if (func_ptr == NULL) {
+            // In rare cases, a symbol can exist but have a NULL value
+            printf("[WARNING] Function '%s' found but is NULL.\n", functions[i]);
+            exit(EXIT_FAILURE);
+        } else {
+            printf("[PASSED] Function '%s' exists at address %p.\n", functions[i], (void*)func_ptr);
+        }
+    }
+    
+    dlclose(handle);
+    return (EXIT_SUCCESS);
+}