tests: fix system_spec when run with clipboard manager (#10956)

* tests: move os_kill to functional helpers

* tests: fix system_spec when run with clipboard manager

Replaces "xclip" with a dedicated helper program.

Fixes: https://github.com/neovim/neovim/issues/4900#issuecomment-501866842

1 files changed, 33 insertions, 0 deletions

diff --git a/test/functional/fixtures/streams-test.c b/test/functional/fixtures/streams-test.c
new file mode 100644
index 0000000000..56d475d7dc
--- /dev/null
+++ b/test/functional/fixtures/streams-test.c
@@ -0,0 +1,33 @@
+/// Helper program to exit and keep stdout open (like "xclip -i -loops 1").
+#include <stdio.h>
+
+#include <uv.h>
+
+uv_loop_t *loop;
+uv_process_t child_req;
+uv_process_options_t options;
+
+int main(int argc, char **argv)
+{
+  loop = uv_default_loop();
+
+  char * args[3];
+  args[0] = "sleep";
+  args[1] = "10";
+  args[2] = NULL;
+
+  options.exit_cb = NULL;
+  options.file = "sleep";
+  options.args = args;
+  options.flags = UV_PROCESS_DETACHED;
+
+  int r;
+  if ((r = uv_spawn(loop, &child_req, &options))) {
+    fprintf(stderr, "%s\n", uv_strerror(r));
+    return 1;
+  }
+  fprintf(stderr, "pid: %d\n", child_req.pid);
+  uv_unref((uv_handle_t *)&child_req);
+
+  return uv_run(loop, UV_RUN_DEFAULT);
+}