feat: import trait with alias

[Young-Flash]

close #15684

cc @Veykril

[Young-Flash]

can anyone help review this?

thanks

[lnicola]

Was check_assist picking the last one? I didn't look.

Anyway, the tests are probably overkill, but LGTM. Thanks!

@bors r+

[bors]

📌 Commit 929544e has been approved by lnicola

It is now in the queue for this repository.

[bors]

⌛ Testing commit 929544e with merge 99e94d2...

[lnicola]

Sorry, I marked the wrong PR as draft by mistake.

[bors]

☀️ Test successful - checks-actions
Approved by: lnicola
Pushing 99e94d2 to master...

[Young-Flash]

Was check_assist picking the last one? I didn't look.

check_assist doesn't specify label, when use check_assist, assist_label is None.

rust-analyzer/crates/ide-assists/src/tests.rs

Lines 55 to 58 in a2e2881

	pub(crate) fn check_assist(assist: Handler, ra_fixture_before: &str, ra_fixture_after: &str) {
	let ra_fixture_after = trim_indent(ra_fixture_after);
	check(assist, ra_fixture_before, ExpectedResult::After(&ra_fixture_after), None);
	}

and it just get the pop out one

rust-analyzer/crates/ide-assists/src/tests.rs

Lines 184 to 187 in a2e2881

	let assist = match assist_label {
	Some(label) => res.into_iter().find(|resolved| resolved.label == label),
	None => res.pop(),
	};

here should use check_assist_by_label instead.