1 files changed, 55 insertions, 0 deletions
diff --git a/tests/test_union.rs b/tests/test_union.rs
index 2e1869ac..f35e325a 100644
--- a/tests/test_union.rs
+++ b/tests/test_union.rs
@@ -5,6 +5,7 @@ fn with_anon_struct() {
     assert_bind_eq(Default::default(), "headers/union_with_anon_struct.h", "
         #[repr(C)]
         #[derive(Copy)]
+        #[derive(Debug)]
         pub struct Union_foo {
             pub _bindgen_data_: [u32; 2usize],
         }
@@ -41,6 +42,7 @@ fn with_anon_struct_bitfield() {
     assert_bind_eq(Default::default(), "headers/union_with_anon_struct_bitfield.h", "
         #[repr(C)]
         #[derive(Copy)]
+        #[derive(Debug)]
         pub struct Union_foo {
             pub _bindgen_data_: [u32; 1usize],
         }
@@ -67,6 +69,7 @@ fn with_anon_union() {
     assert_bind_eq(Default::default(), "headers/union_with_anon_union.h", "
         #[repr(C)]
         #[derive(Copy)]
+        #[derive(Debug)]
         pub struct Union_foo {
             pub _bindgen_data_: [u32; 1usize],
         }
@@ -84,6 +87,7 @@ fn with_anon_union() {
         }
         #[repr(C)]
         #[derive(Copy)]
+        #[derive(Debug)]
         pub struct Union_Unnamed1 {
             pub _bindgen_data_: [u32; 1usize],
         }
@@ -111,6 +115,7 @@ fn with_anon_unnamed_struct() {
     assert_bind_eq(Default::default(), "headers/union_with_anon_unnamed_struct.h", "
         #[repr(C)]
         #[derive(Copy)]
+        #[derive(Debug)]
         pub struct Union_pixel {
             pub _bindgen_data_: [u32; 1usize],
         }
@@ -150,6 +155,7 @@ fn with_anon_unnamed_union() {
     assert_bind_eq(Default::default(), "headers/union_with_anon_unnamed_union.h", "
         #[repr(C)]
         #[derive(Copy)]
+        #[derive(Debug)]
         pub struct Union_foo {
             pub _bindgen_data_: [u32; 1usize],
         }
@@ -181,6 +187,7 @@ fn with_nesting() {
     assert_bind_eq(Default::default(), "headers/union_with_nesting.h", "
         #[repr(C)]
         #[derive(Copy)]
+        #[derive(Debug)]
         pub struct Union_foo {
             pub _bindgen_data_: [u32; 1usize],
         }
@@ -214,3 +221,51 @@ fn with_nesting() {
         }
     ");
 }
+
+#[test]
+fn with_derive_debug() {
+    assert_bind_eq(Default::default(), "headers/union_with_big_member.h", "
+        #[repr(C)]
+        #[derive(Copy)]
+        pub struct Union_WithBigArray {
+            pub _bindgen_data_: [u32; 33usize],
+        }
+        impl Union_WithBigArray {
+            pub unsafe fn a(&mut self) -> *mut ::std::os::raw::c_int {
+                let raw: *mut u8 = ::std::mem::transmute(&self._bindgen_data_);
+                ::std::mem::transmute(raw.offset(0))
+            }
+            pub unsafe fn b(&mut self) -> *mut [::std::os::raw::c_int; 33usize] {
+                let raw: *mut u8 = ::std::mem::transmute(&self._bindgen_data_);
+                ::std::mem::transmute(raw.offset(0))
+            }
+        }
+        impl ::std::clone::Clone for Union_WithBigArray {
+            fn clone(&self) -> Self { *self }
+        }
+        impl ::std::default::Default for Union_WithBigArray {
+            fn default() -> Self { unsafe { ::std::mem::zeroed() } }
+        }
+        #[repr(C)]
+        #[derive(Copy)]
+        pub struct Union_WithBigMember {
+            pub _bindgen_data_: [u32; 33usize],
+        }
+        impl Union_WithBigMember {
+            pub unsafe fn a(&mut self) -> *mut ::std::os::raw::c_int {
+                let raw: *mut u8 = ::std::mem::transmute(&self._bindgen_data_);
+                ::std::mem::transmute(raw.offset(0))
+            }
+            pub unsafe fn b(&mut self) -> *mut Union_WithBigArray {
+                let raw: *mut u8 = ::std::mem::transmute(&self._bindgen_data_);
+                ::std::mem::transmute(raw.offset(0))
+            }
+        }
+        impl ::std::clone::Clone for Union_WithBigMember {
+            fn clone(&self) -> Self { *self }
+        }
+        impl ::std::default::Default for Union_WithBigMember {
+            fn default() -> Self { unsafe { ::std::mem::zeroed() } }
+        }
+    ");
+}