Add unicode feature name test case

Signed-off-by: hi-rustin <rustin.liu@gmail.com>

Author: 0xPoe

src/tests/krate/publish/features.rs

@@ -44,6 +44,15 @@ fn feature_name_start_with_number_and_underscore() {
     assert_json_snapshot!(crates);
 }
 
+#[test]
+fn feature_name_with_unicode_chars() {
+    let (app, _, _, token) = TestApp::full().with_token();
+    let crate_to_publish = PublishBuilder::new("foo", "1.0.0").feature("foo.你好世界", &[]);
+    token.publish_crate(crate_to_publish).good();
+    let crates = app.crates_from_index_head("foo");
+    assert_json_snapshot!(crates);
+}
+
 #[test]
 fn empty_feature_name() {
     let (app, _, _, token) = TestApp::full().with_token();

src/tests/krate/publish/snapshots/all__krate__publish__features__feature_name_with_unicode_chars.snap

@@ -0,0 +1,16 @@
+---
+source: src/tests/krate/publish/features.rs
+expression: crates
+---
+[
+  {
+    "name": "foo",
+    "vers": "1.0.0",
+    "deps": [],
+    "cksum": "493720846371607438c1a4eb90c9cc7d7286600ca9c4e2ca04151aad9563b47a",
+    "features": {
+      "foo.你好世界": []
+    },
+    "yanked": false
+  }
+]