Fail test if model file is missing

Author: crasm

tests/test-model-load-cancel.cpp

@@ -1,16 +1,28 @@
 #include "llama.h"
 
+#include <cstdio>
 #include <cstdlib>
 
 int main(void) {
+    auto model_path = "models/7B/ggml-model-f16.gguf";
+    auto file = fopen(model_path, "r");
+
+    if (file == nullptr) {
+        fprintf(stderr, "no model at '%s' found\n", model_path);
+        return EXIT_FAILURE;
+    } else {
+        fprintf(stderr, "using '%s'\n", model_path);
+        fclose(file);
+    }
+
     llama_backend_init(false);
     auto params = llama_model_params{};
     params.use_mmap = false;
     params.progress_callback = [](float progress, void * ctx){
         (void) ctx;
         return progress > 0.50;
     };
-    auto * model = llama_load_model_from_file("models/7B/ggml-model-f16.gguf", params);
+    auto * model = llama_load_model_from_file(model_path, params);
     llama_backend_free();
     return model == nullptr ? EXIT_SUCCESS : EXIT_FAILURE;
 }