zvfs: testcase重写

test/test_write_file.c

@@ -0,0 +1,27 @@
+#include "test_utils.h"
+
+static int test_write_file(const char *path)
+{
+    printf("\n=== test_write_file ===\n");
+
+    int fd = open(path, O_CREAT | O_RDWR, 0644);
+    if (fd < 0) { perror("open"); return 1; }
+    printf("open: %s fd=%d\n", path, fd);
+
+    const char *msg = "Hello, zvfs!";
+    ssize_t w = write(fd, msg, strlen(msg));
+    if (w < 0) { perror("write"); close(fd); return 2; }
+    printf("write: %zd bytes: %s\n", w, msg);
+
+    close(fd);
+    printf("close: ok\n");
+    return 0;
+}
+
+int main(int argc, char **argv)
+{
+    char path[PATH_MAX];
+    make_path(path, sizeof(path), argc >= 2 ? argv[1] : NULL, "file.dat");
+    int rc = test_write_file(path);
+    return report_result("test_write_file", rc);
+}