Do not spawn blacklisted_name lint in test context

Fix detecting of the 'test' attribute

Update UI test to actually check that warning is not triggered in the test code

Fix approach for detecting the test module

Add nested test case

Remove code duplication by extracting 'is_test_module_or_function' into 'clippy_utils'

Cleanup the code

1 files changed, 12 insertions, 0 deletions

diff --git a/clippy_utils/src/lib.rs b/clippy_utils/src/lib.rs
index 66e75b0c206..ef4854afc83 100644
--- a/clippy_utils/src/lib.rs
+++ b/clippy_utils/src/lib.rs
@@ -1727,3 +1727,15 @@ pub fn is_hir_ty_cfg_dependant(cx: &LateContext<'_>, ty: &hir::Ty<'_>) -> bool {
         }
     }
 }
+
+/// Checks whether item either has `test` attribute applied, or
+/// is a module with `test` in its name.
+pub fn is_test_module_or_function(tcx: TyCtxt<'_>, item: &Item<'_>) -> bool {
+    if let Some(def_id) = tcx.hir().opt_local_def_id(item.hir_id()) {
+        if tcx.has_attr(def_id.to_def_id(), sym::test) {
+            return true;
+        }
+    }
+
+    matches!(item.kind, ItemKind::Mod(..)) && item.ident.name.as_str().contains("test")
+}