Speculatively expand attributes in completions

crates/ide_completion/src/tests/proc_macros.rs

@@ -0,0 +1,75 @@
+//! Completion tests for expressions.
+use expect_test::{expect, Expect};
+
+use crate::tests::completion_list;
+
+fn check(ra_fixture: &str, expect: Expect) {
+    let actual = completion_list(ra_fixture);
+    expect.assert_eq(&actual)
+}
+
+#[test]
+fn complete_dot_in_attr() {
+    check(
+        r#"
+//- proc_macros: identity
+pub struct Foo;
+impl Foo {
+    fn foo(&self) {}
+}
+
+#[proc_macros::identity]
+fn main() {
+    Foo.$0
+}
+"#,
+        expect![[r#"
+            me foo() fn(&self)
+            sn ref   &expr
+            sn refm  &mut expr
+            sn match match expr {}
+            sn box   Box::new(expr)
+            sn ok    Ok(expr)
+            sn err   Err(expr)
+            sn some  Some(expr)
+            sn dbg   dbg!(expr)
+            sn dbgr  dbg!(&expr)
+            sn call  function(expr)
+            sn let   let
+            sn letm  let mut
+        "#]],
+    )
+}
+
+#[test]
+fn complete_dot_in_attr2() {
+    check(
+        r#"
+//- proc_macros: identity
+pub struct Foo;
+impl Foo {
+    fn foo(&self) {}
+}
+
+#[proc_macros::identity]
+fn main() {
+    Foo.f$0
+}
+"#,
+        expect![[r#"
+            me foo() fn(&self)
+            sn ref   &expr
+            sn refm  &mut expr
+            sn match match expr {}
+            sn box   Box::new(expr)
+            sn ok    Ok(expr)
+            sn err   Err(expr)
+            sn some  Some(expr)
+            sn dbg   dbg!(expr)
+            sn dbgr  dbg!(&expr)
+            sn call  function(expr)
+            sn let   let
+            sn letm  let mut
+        "#]],
+    )
+}