Better support client completion resolve caps

crates/completion/src/item.rs

@@ -12,6 +12,7 @@ use crate::config::SnippetCap;
 /// `CompletionItem` describes a single completion variant in the editor pop-up.
 /// It is basically a POD with various properties. To construct a
 /// `CompletionItem`, use `new` method and the `Builder` struct.
+#[derive(Clone)]
 pub struct CompletionItem {
     /// Used only internally in tests, to check only specific kind of
     /// completion (postfix, keyword, reference, etc).

crates/completion/src/test_utils.rs

@@ -97,6 +97,7 @@ pub(crate) fn check_edit_with_config(
         .unwrap_or_else(|| panic!("can't find {:?} completion in {:#?}", what, completions));
     let mut actual = db.file_text(position.file_id).to_string();
     completion.text_edit().apply(&mut actual);
+    // TODO kb how to apply imports now?
     assert_eq_text!(&ra_fixture_after, &actual)
 }