1 files changed, 54 insertions, 2 deletions
diff --git a/tests/test_path.rs b/tests/test_path.rs
index 2ce12066..e05b52ee 100644
--- a/tests/test_path.rs
+++ b/tests/test_path.rs
@@ -2,9 +2,9 @@
 mod macros;
 
 use proc_macro2::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree};
-use quote::quote;
+use quote::{quote, ToTokens};
 use std::iter::FromIterator;
-use syn::{Expr, Type};
+use syn::{parse_quote, Expr, Type, TypePath};
 
 #[test]
 fn parse_interpolated_leading_component() {
@@ -50,3 +50,55 @@ fn parse_interpolated_leading_component() {
     }
     "###);
 }
+
+#[test]
+fn print_incomplete_qpath() {
+    // qpath with `as` token
+    let mut ty: TypePath = parse_quote!(<Self as A>::Q);
+    snapshot!(ty.to_token_stream(), @r###"
+    TokenStream(`< Self as A > :: Q`)
+    "###);
+    assert!(ty.path.segments.pop().is_some());
+    snapshot!(ty.to_token_stream(), @r###"
+    TokenStream(`< Self as A > ::`)
+    "###);
+    assert!(ty.path.segments.pop().is_some());
+    snapshot!(ty.to_token_stream(), @r###"
+    TokenStream(`< Self >`)
+    "###);
+    assert!(ty.path.segments.pop().is_none());
+
+    // qpath without `as` token
+    let mut ty: TypePath = parse_quote!(<Self>::A::B);
+    snapshot!(ty.to_token_stream(), @r###"
+    TokenStream(`< Self > :: A :: B`)
+    "###);
+    assert!(ty.path.segments.pop().is_some());
+    snapshot!(ty.to_token_stream(), @r###"
+    TokenStream(`< Self > :: A ::`)
+    "###);
+    assert!(ty.path.segments.pop().is_some());
+    snapshot!(ty.to_token_stream(), @r###"
+    TokenStream(`< Self > ::`)
+    "###);
+    assert!(ty.path.segments.pop().is_none());
+
+    // normal path
+    let mut ty: TypePath = parse_quote!(Self::A::B);
+    snapshot!(ty.to_token_stream(), @r###"
+    TokenStream(`Self :: A :: B`)
+    "###);
+    assert!(ty.path.segments.pop().is_some());
+    snapshot!(ty.to_token_stream(), @r###"
+    TokenStream(`Self :: A ::`)
+    "###);
+    assert!(ty.path.segments.pop().is_some());
+    snapshot!(ty.to_token_stream(), @r###"
+    TokenStream(`Self ::`)
+    "###);
+    assert!(ty.path.segments.pop().is_some());
+    snapshot!(ty.to_token_stream(), @r###"
+    TokenStream(``)
+    "###);
+    assert!(ty.path.segments.pop().is_none());
+}