Update user_commands test check all spheres.

Signed-off-by: Benjamin Perseghetti <bperseghetti@rudislabs.com>

test/integration/user_commands.cc

@@ -1116,16 +1116,37 @@ TEST_F(UserCommandsTest, GZ_UTILS_TEST_ENABLED_ONLY_ON_LINUX(MaterialColor))
   gz::msgs::Set(materialColorMsg.mutable_diffuse(),
     gz::math::Color(1.0f, 1.0f, 1.0f, 1.0f));
 
+  Entity sphereEntity0 =
+    ecm->EntityByComponents(components::Name("sphere_0"));
+  Entity sphereEntity1 =
+    ecm->EntityByComponents(components::Name("sphere_1"));
+  auto sphereLinkEntity0 =
+    ecm->ChildrenByComponents(sphereEntity0, components::Name("sphere_link_0"))[0];
+  auto sphereLinkEntity1 =
+    ecm->ChildrenByComponents(sphereEntity1, components::Name("sphere_link_1"))[0];
+  auto sphereVisualEntity0 =
+    ecm->ChildrenByComponents(sphereLinkEntity0, components::Name("sphere_visual"))[0];
+  auto sphereVisualEntity1 =
+    ecm->ChildrenByComponents(sphereLinkEntity1, components::Name("sphere_visual"))[0];
+  auto updatedVisual0 =
+    ecm->Component<components::Material>(sphereVisualEntity0);
+  auto updatedVisual1 =
+    ecm->Component<components::Material>(sphereVisualEntity1);
+  EXPECT_TRUE((math::Color(0.0f, 0.0f, 0.0f, 1.0f) ==
+              updatedVisual0->Data().Diffuse()) ||
+              (math::Color(0.0f, 0.0f, 0.0f, 1.0f) ==
+              updatedVisual1->Data().Diffuse()));
+
   // Publish material color
   pub.Publish(materialColorMsg);
   server.Run(true, 100, false);
   // Sleep for a small duration to allow Run thread to start
   GZ_SLEEP_MS(100);
 
-  auto updatedVisual =
-    ecm->Component<components::Material>(sphereVisualEntity);
   EXPECT_EQ(math::Color(1.0f, 1.0f, 1.0f, 1.0f),
-            updatedVisual->Data().Diffuse());
+            updatedVisual0->Data().Diffuse());
+  EXPECT_EQ(math::Color(1.0f, 1.0f, 1.0f, 1.0f),
+            updatedVisual1->Data().Diffuse());
 }
 
 /////////////////////////////////////////////////

test/worlds/material_color.sdf

@@ -19,9 +19,9 @@
       <render_engine>ogre2</render_engine>
     </plugin>
 
-    <model name="sphere">
+    <model name="sphere_0">
       <pose>0 0.0 0.0 0 0 0</pose>
-      <link name="sphere_link">
+      <link name="sphere_link_0">
         <!-- Added a render sensor to trigger RenderUtil:Update -->
         <sensor name="camera" type="camera">
           <pose>1 0 1.3 0 0 0</pose>
@@ -57,7 +57,7 @@
     </model>
     <model name="sphere_1">
       <pose>0.5 1.0 0.0 0 0 0</pose>
-      <link name="sphere_link">
+      <link name="sphere_link_1">
         <visual name="sphere_visual">
           <geometry>
             <sphere>