Added tests for array pointers

tests/expectations/tests/array_pointers.rs

@@ -0,0 +1,21 @@
+/* automatically generated by rust-bindgen */
+
+#![allow(
+    dead_code,
+    non_snake_case,
+    non_camel_case_types,
+    non_upper_case_globals
+)]
+
+extern "C" {
+    pub fn test_fn(
+        a: f32,
+        arr: *mut ::std::os::raw::c_int,
+    ) -> ::std::os::raw::c_int;
+}
+extern "C" {
+    pub fn test_fn2(
+        arr: *const f32,
+        b: ::std::os::raw::c_int,
+    ) -> ::std::os::raw::c_int;
+}

tests/headers/array_pointers.h

@@ -0,0 +1,4 @@
+
+int test_fn(float a, int arr[20]);
+
+int test_fn2(const float arr[20], int b);

tests/tests.rs

@@ -466,3 +466,47 @@ fn dump_preprocessed_input() {
         "cpp-empty-layout.hpp is in the preprocessed file"
     );
 }
+
+
+#[test]
+fn test_array_pointers() {
+    let actual = builder()
+        .header(concat!(env!("CARGO_MANIFEST_DIR"), "/tests/headers/array_pointers.h"))
+        .array_pointers(true)
+        .generate()
+        .unwrap()
+        .to_string();
+
+    let (actual, stderr) = rustfmt(actual);
+    println!("{}", stderr);
+
+    let (expected, _) = rustfmt(r#"/* automatically generated by rust-bindgen */
+
+extern "C" {
+    pub fn test_fn(
+        a: f32,
+        arr: *mut [::std::os::raw::c_int; 20usize],
+    ) -> ::std::os::raw::c_int;
+}
+extern "C" {
+    pub fn test_fn2(
+        arr: *const [f32; 20usize],
+        b: ::std::os::raw::c_int,
+    ) -> ::std::os::raw::c_int;
+}
+"#.to_string());
+
+    if actual != expected {
+        println!("Generated bindings differ from expected!");
+
+        for diff in diff::lines(&actual, &expected) {
+            match diff {
+                diff::Result::Left(l) => println!("-{}", l),
+                diff::Result::Both(l, _) => println!(" {}", l),
+                diff::Result::Right(r) => println!("+{}", r),
+            }
+        }
+
+        panic!();
+    }
+}