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configurably allow useless_vec in tests

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This adds a `àllow-useless-vec-in-test` configuration which, when set
to `true` will allow the `useless_vec` lint in `#[test]` functions and
code within `#[cfg(test)]`. It also moves a `is_in_test` helper to
`clippy_utils`.
This commit is contained in:
Andre Bogus 2024-04-28 00:01:14 +02:00 • committed by blyxyas
parent c6bf9548d5
commit 87efce4fa2
12 changed files with 97 additions and 8 deletions
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6
clippy_lints/src/vec.rs
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@ -7,7 +7,7 @@ use clippy_utils::diagnostics::span_lint_hir_and_then;
use clippy_utils::source::snippet_opt;
use clippy_utils::ty::is_copy;
use clippy_utils::visitors::for_each_local_use_after_expr;
use clippy_utils::{get_parent_expr, higher, is_trait_method};
use clippy_utils::{get_parent_expr, higher, is_in_test, is_trait_method};
use rustc_errors::Applicability;
use rustc_hir::{BorrowKind, Expr, ExprKind, HirId, LetStmt, Mutability, Node, Pat, PatKind};
use rustc_lint::{LateContext, LateLintPass};
@ -22,6 +22,7 @@ pub struct UselessVec {
pub too_large_for_stack: u64,
pub msrv: Msrv,
pub span_to_lint_map: BTreeMap<Span, Option<(HirId, SuggestedType, String, Applicability)>>,
pub allow_in_test: bool,
}
declare_clippy_lint! {
@ -57,6 +58,9 @@ impl<'tcx> LateLintPass<'tcx> for UselessVec {
let Some(vec_args) = higher::VecArgs::hir(cx, expr.peel_borrows()) else {
return;
};
if self.allow_in_test && is_in_test(cx.tcx, expr.hir_id) {
return;
};
// the parent callsite of this `vec!` expression, or span to the borrowed one such as `&vec!`
let callsite = expr.span.parent_callsite().unwrap_or(expr.span);