1 files changed, 22 insertions, 1 deletions

diff --git a/crates/ra_ide/src/completion/test_utils.rs b/crates/ra_ide/src/completion/test_utils.rs
index 5c01654cc..9c036eac7 100644
--- a/crates/ra_ide/src/completion/test_utils.rs
+++ b/crates/ra_ide/src/completion/test_utils.rs
@@ -1,7 +1,10 @@
 //! Runs completion for testing purposes.
 
 use hir::Semantics;
+use itertools::Itertools;
 use ra_syntax::{AstNode, NodeOrToken, SyntaxElement};
+use stdx::format_to;
+use test_utils::assert_eq_text;
 
 use crate::{
     completion::{completion_item::CompletionKind, CompletionConfig},
@@ -42,10 +45,28 @@ pub(crate) fn completion_list_with_options(
     kind_completions.sort_by_key(|c| c.label().to_owned());
     kind_completions
         .into_iter()
-        .map(|it| format!("{} {}\n", it.kind().unwrap().tag(), it.label()))
+        .map(|it| {
+            let mut buf = format!("{} {}", it.kind().unwrap().tag(), it.label());
+            if let Some(detail) = it.detail() {
+                format_to!(buf, " {}", detail);
+            }
+            format_to!(buf, "\n");
+            buf
+        })
         .collect()
 }
 
+pub(crate) fn check_edit(what: &str, ra_fixture_before: &str, ra_fixture_after: &str) {
+    let (analysis, position) = analysis_and_position(ra_fixture_before);
+    let completions: Vec<CompletionItem> =
+        analysis.completions(&CompletionConfig::default(), position).unwrap().unwrap().into();
+    let (completion,) =
+        completions.into_iter().filter(|it| it.label() == what).collect_tuple().unwrap();
+    let mut actual = analysis.file_text(position.file_id).unwrap().to_string();
+    completion.text_edit().apply(&mut actual);
+    assert_eq_text!(ra_fixture_after, &actual)
+}
+
 pub(crate) fn check_pattern_is_applicable(code: &str, check: fn(SyntaxElement) -> bool) {
     let (analysis, pos) = analysis_and_position(code);
     analysis