From c5995bda24d628ddecda8bbe10db9b4415cc973a Mon Sep 17 00:00:00 2001
From: Christian Poveda <christian.poveda@ferrous-systems.com>
Date: Fri, 12 Aug 2022 13:36:16 -0500
Subject: test warning emission

---
 tests/expectations/tests/allowlist_warnings.rs |  6 ++++++
 tests/headers/allowlist_warnings.h             |  2 ++
 tests/tests.rs                                 | 16 ++++++++++++++++
 3 files changed, 24 insertions(+)
 create mode 100644 tests/expectations/tests/allowlist_warnings.rs
 create mode 100644 tests/headers/allowlist_warnings.h

diff --git a/tests/expectations/tests/allowlist_warnings.rs b/tests/expectations/tests/allowlist_warnings.rs
new file mode 100644
index 00000000..131dbdf3
--- /dev/null
+++ b/tests/expectations/tests/allowlist_warnings.rs
@@ -0,0 +1,6 @@
+#![allow(
+    dead_code,
+    non_snake_case,
+    non_camel_case_types,
+    non_upper_case_globals
+)]
diff --git a/tests/headers/allowlist_warnings.h b/tests/headers/allowlist_warnings.h
new file mode 100644
index 00000000..83c9e259
--- /dev/null
+++ b/tests/headers/allowlist_warnings.h
@@ -0,0 +1,2 @@
+// bindgen-flags: --allowlist-function "doesnt_match_anything"
+int non_matched_function(int arg);
diff --git a/tests/tests.rs b/tests/tests.rs
index cc64cfdd..7b46df5e 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -670,3 +670,19 @@ fn dump_preprocessed_input() {
         "cpp-empty-layout.hpp is in the preprocessed file"
     );
 }
+
+#[test]
+fn allowlist_warnings() {
+    let header = concat!(
+        env!("CARGO_MANIFEST_DIR"),
+        "/tests/headers/allowlist_warnings.h"
+    );
+
+    let mut bindings = builder()
+        .header(header)
+        .allowlist_function("doesnt_match_anything")
+        .generate()
+        .expect("unable to generate bindings");
+
+    assert_eq!(1, bindings.take_warnings().count());
+}
-- 
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