++

testing/dart/fragment_shader_test.dart

@@ -63,16 +63,19 @@ void main() async {
   });
 
   test('FragmentShader with sampler asserts if sampler is missing when assigned to paint', () async {
+    if (!assertsEnabled) {
+      return;
+    }
     final FragmentProgram program = await FragmentProgram.fromAsset(
       'blue_green_sampler.frag.iplr',
     );
     final FragmentShader fragmentShader = program.fragmentShader();
 
     try {
-      Paint()..shader = fragmentShader;
+      Paint().shader = fragmentShader;
       fail('Expected to throw');
     } catch (err) {
-      expect(err, contains('Invalid FragmentShader blue_green_sampler.frag.iplr'));
+      expect(err.toString(), contains('Invalid FragmentShader blue_green_sampler.frag.iplr'));
     } finally {
       fragmentShader.dispose();
     }