[ffigen] Change native test bindings name for consistency (#556)

diff --git a/pkgs/ffigen/test/README.md b/pkgs/ffigen/test/README.md
index 1a499a4..cfcc314 100644
--- a/pkgs/ffigen/test/README.md
+++ b/pkgs/ffigen/test/README.md

@@ -34,7 +34,7 @@
     `test/debug_generated` directory.
 
 3.  Comparing the golden file (i.e.
-    [`test/native_test/native_test_bindings.dart`](https://github.com/dart-lang/ffigen/blob/master/test/native_test/native_test_bindings.dart))
+    [`test/native_test/_expected_native_test_bindings.dart`](https://github.com/dart-lang/ffigen/blob/master/test/native_test/_expected_native_test_bindings.dart))
     to the generated file and generating a test failure if they do not match.
 
 4.  Using the *golden* bindings to excercise the dynamic library.

diff --git a/pkgs/ffigen/test/native_test/native_test_bindings.dart b/pkgs/ffigen/test/native_test/_expected_native_test_bindings.dart
similarity index 100%
rename from pkgs/ffigen/test/native_test/native_test_bindings.dart
rename to pkgs/ffigen/test/native_test/_expected_native_test_bindings.dart


diff --git a/pkgs/ffigen/test/native_test/config.yaml b/pkgs/ffigen/test/native_test/config.yaml
index 901e559..3942f6f 100644
--- a/pkgs/ffigen/test/native_test/config.yaml
+++ b/pkgs/ffigen/test/native_test/config.yaml

@@ -8,7 +8,7 @@
 
 name: NativeLibrary
 description: 'Native tests.'
-output: 'native_test_bindings.dart'
+output: '_expected_native_test_bindings.dart'
 headers:
   entry-points:
     - 'native_test.c'

diff --git a/pkgs/ffigen/test/native_test/native_test.dart b/pkgs/ffigen/test/native_test/native_test.dart
index 7a19c2a..cc31709 100644
--- a/pkgs/ffigen/test/native_test/native_test.dart
+++ b/pkgs/ffigen/test/native_test/native_test.dart

@@ -10,7 +10,7 @@
 import 'package:path/path.dart' as path;
 import 'package:test/test.dart';
 import '../test_utils.dart';
-import 'native_test_bindings.dart';
+import '_expected_native_test_bindings.dart';
 
 void main() {
   late NativeLibrary bindings;
@@ -32,7 +32,8 @@
       final configFile =
           File(path.join('test', 'native_test', 'config.yaml')).absolute;
       final outFile = File(
-        path.join('test', 'debug_generated', 'native_test_bindings.dart'),
+        path.join(
+            'test', 'debug_generated', '_expected_native_test_bindings.dart'),
       ).absolute;
 
       late Config config;

diff --git a/pkgs/ffigen/test/regen.dart b/pkgs/ffigen/test/regen.dart
index 1ee0df3..1617eda 100644
--- a/pkgs/ffigen/test/regen.dart
+++ b/pkgs/ffigen/test/regen.dart

@@ -52,7 +52,7 @@
 
   final nativeTestConfig = File('test/native_test/config.yaml').absolute;
   final nativeTestOut =
-      File('test/native_test/native_test_bindings.dart').absolute;
+      File('test/native_test/_expected_native_test_bindings.dart').absolute;
   await withChDir(nativeTestConfig.path,
       () => _regenConfig(nativeTestConfig, nativeTestOut));