From d2172178425ef3963a9b9696d5071b808cc33902 Mon Sep 17 00:00:00 2001
From: Benoit Steiner <benoit.steiner.goog@gmail.com>
Date: Fri, 29 Apr 2016 18:15:34 -0700
Subject: Added a few tests to ensure that the dimensions of rank 0 tensors are
 correctly computed

---
 unsupported/test/cxx11_tensor_dimension.cpp | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'unsupported/test/cxx11_tensor_dimension.cpp')

diff --git a/unsupported/test/cxx11_tensor_dimension.cpp b/unsupported/test/cxx11_tensor_dimension.cpp
index ce78efe52..421e73693 100644
--- a/unsupported/test/cxx11_tensor_dimension.cpp
+++ b/unsupported/test/cxx11_tensor_dimension.cpp
@@ -37,7 +37,6 @@ static void test_fixed_size()
   VERIFY_IS_EQUAL(dimensions.TotalSize(), 2*3*7);
 }
 
-
 static void test_match()
 {
   Eigen::DSizes<int, 3> dyn(2,3,7);
@@ -49,10 +48,22 @@ static void test_match()
   VERIFY_IS_EQUAL(Eigen::dimensions_match(dyn1, dyn2), false);
 }
 
+static void test_rank_zero()
+{
+  Eigen::Sizes<> scalar;
+  VERIFY_IS_EQUAL(scalar.TotalSize(), 1);
+  VERIFY_IS_EQUAL(scalar.rank(), 0);
+  VERIFY_IS_EQUAL(internal::array_prod(scalar), 1);
+
+  Eigen::DSizes<ptrdiff_t, 0> dscalar;
+  VERIFY_IS_EQUAL(dscalar.TotalSize(), 1);
+  VERIFY_IS_EQUAL(dscalar.rank(), 0);
+}
 
 void test_cxx11_tensor_dimension()
 {
   CALL_SUBTEST(test_dynamic_size());
   CALL_SUBTEST(test_fixed_size());
   CALL_SUBTEST(test_match());
+  CALL_SUBTEST(test_rank_zero());
 }
-- 
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