Add unit test for PointSetIO::readAGI, document feature

src/pmp/io/PointSetIO.h

@@ -45,8 +45,12 @@ namespace pmp {
 
 //! Class for reading and writing point sets from and to files.
 //!
-//! This class currently supports only the XYZ file format. Only ASCII mode is
-//! supported. Only supports point coordinates and normals.
+//! This class supports XYZ file format for reading and writing. Only ASCII mode
+//! is supported. Only supports point coordinates and normals.
+//!
+//! The class also supports reading colored point clouds from Agisoft.
+//! Format: point coordinates, RGB colors, and normals per line. ASCII only,
+//! file extension ".agi"
 class PointSetIO
 {
 public:

tests/PointSetIOTest.cpp

@@ -47,12 +47,22 @@ TEST_F(PointSetIOTest, write)
     EXPECT_FALSE(ps.write("testxxyyzz"));
 }
 
-TEST_F(PointSetIOTest, read)
+TEST_F(PointSetIOTest, readXYZ)
 {
     ps.read("test.xyz"); // bad test dependency
     EXPECT_EQ(ps.nVertices(), size_t(2));
 }
 
+TEST_F(PointSetIOTest, readAGI)
+{
+    ps.read("pmp-data/agi/test.agi");
+    EXPECT_EQ(ps.nVertices(), size_t(4));
+    auto vcolors = ps.getVertexProperty<Color>("v:color");
+    EXPECT_TRUE(vcolors);
+    auto vnormals = ps.getVertexProperty<Normal>("v:normal");
+    EXPECT_TRUE(vnormals);
+}
+
 TEST_F(PointSetIOTest, readFailure)
 {
     ASSERT_FALSE(ps.read("test.off"));