Fix missing_inline_in_public_items fail to fulfill expect in --test build (#15320)

Closes rust-lang/rust-clippy#13394

changelog: [`missing_inline_in_public_items`] fix failure to fulfill
`expect` in `--test` build

Author: Alexendoo

clippy_lints/src/missing_inline.rs

@@ -4,6 +4,7 @@ use rustc_hir::def_id::DefId;
 use rustc_hir::{self as hir, Attribute, find_attr};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_middle::ty::AssocContainer;
+use rustc_session::config::CrateType;
 use rustc_session::declare_lint_pass;
 use rustc_span::Span;
 
@@ -81,20 +82,20 @@ fn check_missing_inline_attrs(
     }
 }
 
-fn is_executable_or_proc_macro(cx: &LateContext<'_>) -> bool {
-    use rustc_session::config::CrateType;
-
-    cx.tcx
-        .crate_types()
-        .iter()
-        .any(|t: &CrateType| matches!(t, CrateType::Executable | CrateType::ProcMacro))
-}
-
 declare_lint_pass!(MissingInline => [MISSING_INLINE_IN_PUBLIC_ITEMS]);
 
 impl<'tcx> LateLintPass<'tcx> for MissingInline {
     fn check_item(&mut self, cx: &LateContext<'tcx>, it: &'tcx hir::Item<'_>) {
-        if it.span.in_external_macro(cx.sess().source_map()) || is_executable_or_proc_macro(cx) {
+        if it.span.in_external_macro(cx.sess().source_map()) {
+            return;
+        }
+
+        if cx
+            .tcx
+            .crate_types()
+            .iter()
+            .any(|t: &CrateType| matches!(t, CrateType::ProcMacro))
+        {
             return;
         }
 
@@ -149,7 +150,13 @@ impl<'tcx> LateLintPass<'tcx> for MissingInline {
     }
 
     fn check_impl_item(&mut self, cx: &LateContext<'tcx>, impl_item: &'tcx hir::ImplItem<'_>) {
-        if impl_item.span.in_external_macro(cx.sess().source_map()) || is_executable_or_proc_macro(cx) {
+        if impl_item.span.in_external_macro(cx.sess().source_map())
+            || cx
+                .tcx
+                .crate_types()
+                .iter()
+                .any(|t: &CrateType| matches!(t, CrateType::ProcMacro))
+        {
             return;
         }
 

tests/ui/missing_inline_executable.rs

@@ -1,7 +1,6 @@
-//@ check-pass
-
 #![warn(clippy::missing_inline_in_public_items)]
 
 pub fn foo() {}
+//~^ missing_inline_in_public_items
 
 fn main() {}

tests/ui/missing_inline_executable.stderr

@@ -0,0 +1,11 @@
+error: missing `#[inline]` for a function
+  --> tests/ui/missing_inline_executable.rs:3:1
+   |
+LL | pub fn foo() {}
+   | ^^^^^^^^^^^^^^^
+   |
+   = note: `-D clippy::missing-inline-in-public-items` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::missing_inline_in_public_items)]`
+
+error: aborting due to 1 previous error
+

tests/ui/missing_inline_test_crate.rs

@@ -0,0 +1,10 @@
+//@compile-flags: --test
+//@check-pass
+#![warn(clippy::missing_inline_in_public_items)]
+
+#[expect(clippy::missing_inline_in_public_items)]
+pub fn foo() -> u32 {
+    0
+}
+
+fn private_function() {}