Add unit test for issue 623

test/models/PLY/issue623.ply

@@ -0,0 +1,36 @@
+ply
+format ascii 1.0
+comment Created by Blender 2.77 (sub 0) - www.blender.org, source file: ''
+element vertex 24
+property float x
+property float y
+property float z
+property float nx
+property float ny
+property float nz
+property list uchar uint vertex_indices
+end_header
+7.941797 1.432409 -0.927566 0.000000 0.000000 -1.000000
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+7.941798 1.432408 2.826117 1.000000 -0.000000 0.000000
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+4.188114 1.432409 2.826117 -1.000000 0.000000 -0.000000
+4.188115 1.432410 -0.927566 -1.000000 0.000000 -0.000000
+7.941798 1.432408 2.826117 0.000000 1.000000 0.000000
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+4.188115 1.432410 -0.927566 0.000000 1.000000 0.000000
+4.188114 1.432409 2.826117 0.000000 1.000000 0.000000

test/unit/utPLYImportExport.cpp

@@ -136,6 +136,18 @@ TEST_F( utPLYImportExport, vertexColorTest ) {
     EXPECT_EQ(2, first_face.mIndices[2]);
 }
 
+//Test issue #623, PLY importer should not automatically create faces
+TEST_F(utPLYImportExport, pointcloudTest) {
+  Assimp::Importer importer;
+  const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/PLY/issue623.ply", 0);
+  EXPECT_NE(nullptr, scene);
+
+  EXPECT_EQ(1u, scene->mNumMeshes);
+  EXPECT_NE(nullptr, scene->mMeshes[0]);
+  EXPECT_EQ(24u, scene->mMeshes[0]->mNumVertices);
+  EXPECT_EQ(0u, scene->mMeshes[0]->mNumFaces);
+}
+
 static const char *test_file =
     "ply\n"
     "format ascii 1.0\n"