1 files changed, 30 insertions, 0 deletions
diff --git a/tests/ui/proc-macro/auxiliary/not-joint.rs b/tests/ui/proc-macro/auxiliary/not-joint.rs
new file mode 100644
index 00000000000..e6c09f7628e
--- /dev/null
+++ b/tests/ui/proc-macro/auxiliary/not-joint.rs
@@ -0,0 +1,30 @@
+// force-host
+// no-prefer-dynamic
+
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro;
+
+use proc_macro::*;
+
+#[proc_macro]
+pub fn tokens(input: TokenStream) -> TokenStream {
+    assert_nothing_joint(input);
+    TokenStream::new()
+}
+
+#[proc_macro_attribute]
+pub fn nothing(_: TokenStream, input: TokenStream) -> TokenStream {
+    assert_nothing_joint(input);
+    TokenStream::new()
+}
+
+fn assert_nothing_joint(s: TokenStream) {
+    for tt in s {
+        match tt {
+            TokenTree::Group(g) => assert_nothing_joint(g.stream()),
+            TokenTree::Punct(p) => assert_eq!(p.spacing(), Spacing::Alone),
+            _ => {}
+        }
+    }
+}