Add ToElement errors test

Signed-off-by: Marco A. Gutierrez <marco@openrobotics.org>

src/ParticleEmitter_TEST.cc

@@ -17,6 +17,7 @@
 
 #include <gtest/gtest.h>
 #include "sdf/ParticleEmitter.hh"
+#include "test_utils.hh"
 
 /////////////////////////////////////////////////
 TEST(DOMParticleEmitter, Construction)
@@ -167,3 +168,72 @@ TEST(DOMParticleEmitter, ToElement)
   EXPECT_EQ(emitter.RawPose(), emitter2.RawPose());
   EXPECT_NE(nullptr, emitter2.Material());
 }
+
+/////////////////////////////////////////////////
+TEST(DOMParticleEmitter, ToElementErrorOutput)
+{
+  std::stringstream buffer;
+  sdf::testing::RedirectConsoleStream redir(
+      sdf::Console::Instance()->GetMsgStream(), &buffer);
+
+  #ifdef _WIN32
+    sdf::Console::Instance()->SetQuiet(false);
+    sdf::testing::ScopeExit revertSetQuiet(
+      []
+      {
+        sdf::Console::Instance()->SetQuiet(true);
+      });
+  #endif
+  sdf::ParticleEmitter emitter;
+  sdf::Errors errors;
+
+  emitter.SetName("my-emitter");
+  emitter.SetType(sdf::ParticleEmitterType::BOX);
+  emitter.SetEmitting(true);
+  emitter.SetDuration(1.2);
+  emitter.SetLifetime(3.4);
+  emitter.SetRate(12.5);
+  emitter.SetScaleRate(0.2);
+  emitter.SetMinVelocity(32.4);
+  emitter.SetMaxVelocity(50.1);
+  emitter.SetSize(gz::math::Vector3d(1, 2, 3));
+  emitter.SetParticleSize(gz::math::Vector3d(4, 5, 6));
+  emitter.SetColorStart(gz::math::Color(0.1f, 0.2f, 0.3f, 1.0f));
+  emitter.SetColorEnd(gz::math::Color(0.4f, 0.5f, 0.6f, 1.0f));
+  emitter.SetColorRangeImage("my-image");
+  emitter.SetTopic("my-topic");
+  emitter.SetScatterRatio(0.3f);
+  emitter.SetRawPose(gz::math::Pose3d(1, 2, 3, 0.1, 0.2, 0.3));
+  sdf::Material material;
+  emitter.SetMaterial(material);
+
+  sdf::ElementPtr elem = emitter.ToElement(errors);
+  EXPECT_TRUE(errors.empty());
+  ASSERT_NE(nullptr, elem);
+
+  sdf::ParticleEmitter emitter2;
+  errors = emitter2.Load(elem);
+  EXPECT_TRUE(errors.empty());
+
+  EXPECT_EQ(emitter.Name(), emitter2.Name());
+  EXPECT_EQ(emitter.Type(), emitter2.Type());
+  EXPECT_EQ(emitter.Emitting(), emitter2.Emitting());
+  EXPECT_DOUBLE_EQ(emitter.Duration(), emitter2.Duration());
+  EXPECT_DOUBLE_EQ(emitter.Lifetime(), emitter2.Lifetime());
+  EXPECT_DOUBLE_EQ(emitter.Rate(), emitter2.Rate());
+  EXPECT_DOUBLE_EQ(emitter.ScaleRate(), emitter2.ScaleRate());
+  EXPECT_DOUBLE_EQ(emitter.MinVelocity(), emitter2.MinVelocity());
+  EXPECT_DOUBLE_EQ(emitter.MaxVelocity(), emitter2.MaxVelocity());
+  EXPECT_EQ(emitter.Size(), emitter2.Size());
+  EXPECT_EQ(emitter.ParticleSize(), emitter2.ParticleSize());
+  EXPECT_EQ(emitter.ColorStart(), emitter2.ColorStart());
+  EXPECT_EQ(emitter.ColorEnd(), emitter2.ColorEnd());
+  EXPECT_EQ(emitter.ColorRangeImage(), emitter2.ColorRangeImage());
+  EXPECT_EQ(emitter.Topic(), emitter2.Topic());
+  EXPECT_FLOAT_EQ(emitter.ScatterRatio(), emitter2.ScatterRatio());
+  EXPECT_EQ(emitter.RawPose(), emitter2.RawPose());
+  EXPECT_NE(nullptr, emitter2.Material());
+
+  // Check nothing has been printed
+  EXPECT_TRUE(buffer.str().empty()) << buffer.str();
+}