Move items_after_test_module logic into check_crate

clippy_lints/src/items_after_test_module.rs

@@ -1,6 +1,6 @@
 use clippy_utils::diagnostics::span_lint_and_help;
 use clippy_utils::{is_from_proc_macro, is_in_cfg_test};
-use rustc_hir::{HirId, ItemId, ItemKind, Mod};
+use rustc_hir::{ItemId, ItemKind};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_middle::lint::in_external_macro;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
@@ -42,7 +42,7 @@ declare_clippy_lint! {
 declare_lint_pass!(ItemsAfterTestModule => [ITEMS_AFTER_TEST_MODULE]);
 
 impl LateLintPass<'_> for ItemsAfterTestModule {
-    fn check_mod(&mut self, cx: &LateContext<'_>, _: &Mod<'_>, _: HirId) {
+    fn check_crate(&mut self, cx: &LateContext<'_>) {
         let mut was_test_mod_visited = false;
         let mut test_mod_span: Option<Span> = None;
 

tests/ui/items_after_test_module/block_module.rs

@@ -1,4 +1,3 @@
-//@compile-flags: --test
 #![allow(unused)]
 #![warn(clippy::items_after_test_module)]
 

tests/ui/items_after_test_module/block_module.stderr

@@ -1,2 +1,18 @@
-error: Option 'test' given more than once
+error: items were found after the testing module
+  --> $DIR/block_module.rs:12:1
+   |
+LL | / mod tests {
+LL | |     #[test]
+LL | |     fn hi() {}
+LL | | }
+...  |
+LL | |     () => {};
+LL | | }
+   | |_^
+   |
+   = help: move the items to before the testing module was defined
+   = note: `-D clippy::items-after-test-module` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::items_after_test_module)]`
+
+error: aborting due to previous error