From 573b377110d488886bfc6b319c140a3375d5d91a Mon Sep 17 00:00:00 2001
From: Benoit Steiner <benoit.steiner.goog@gmail.com>
Date: Fri, 27 Feb 2015 08:46:04 -0800
Subject: Added support for vectorized type casting of tensors

---
 unsupported/test/cxx11_tensor_casts.cpp | 56 ++++++++++++++++++++++++++++++++-
 1 file changed, 55 insertions(+), 1 deletion(-)

(limited to 'unsupported/test/cxx11_tensor_casts.cpp')

diff --git a/unsupported/test/cxx11_tensor_casts.cpp b/unsupported/test/cxx11_tensor_casts.cpp
index 4f7ff7067..f53679d7b 100644
--- a/unsupported/test/cxx11_tensor_casts.cpp
+++ b/unsupported/test/cxx11_tensor_casts.cpp
@@ -17,7 +17,7 @@ using Eigen::array;
 static void test_simple_cast()
 {
   Tensor<float, 2> ftensor(20,30);
-  ftensor.setRandom();
+  ftensor = ftensor.random() * 100.f;
   Tensor<char, 2> chartensor(20,30);
   chartensor.setRandom();
   Tensor<std::complex<float>, 2> cplextensor(20,30);
@@ -35,7 +35,61 @@ static void test_simple_cast()
 }
 
 
+static void test_vectorized_cast()
+{
+  Tensor<int, 2> itensor(20,30);
+  itensor = itensor.random() / 1000;
+  Tensor<float, 2> ftensor(20,30);
+  ftensor.setRandom();
+  Tensor<double, 2> dtensor(20,30);
+  dtensor.setRandom();
+
+  ftensor = itensor.cast<float>();
+  dtensor = itensor.cast<double>();
+
+  for (int i = 0; i < 20; ++i) {
+    for (int j = 0; j < 30; ++j) {
+      VERIFY_IS_EQUAL(itensor(i,j), static_cast<int>(ftensor(i,j)));
+      VERIFY_IS_EQUAL(dtensor(i,j), static_cast<double>(ftensor(i,j)));
+    }
+  }
+}
+
+
+static void test_big_to_small_type_cast()
+{
+  Tensor<double, 2> dtensor(20, 30);
+  dtensor.setRandom();
+  Tensor<float, 2> ftensor(20, 30);
+  ftensor = dtensor.cast<float>();
+
+  for (int i = 0; i < 20; ++i) {
+    for (int j = 0; j < 30; ++j) {
+      VERIFY_IS_APPROX(dtensor(i,j), static_cast<double>(ftensor(i,j)));
+    }
+  }
+}
+
+
+static void test_small_to_big_type_cast()
+{
+  Tensor<float, 2> ftensor(20, 30);
+  ftensor.setRandom();
+  Tensor<double, 2> dtensor(20, 30);
+  dtensor = ftensor.cast<double>();
+
+  for (int i = 0; i < 20; ++i) {
+    for (int j = 0; j < 30; ++j) {
+      VERIFY_IS_APPROX(dtensor(i,j), static_cast<double>(ftensor(i,j)));
+    }
+  }
+}
+
+
 void test_cxx11_tensor_casts()
 {
    CALL_SUBTEST(test_simple_cast());
+   CALL_SUBTEST(test_vectorized_cast());
+   CALL_SUBTEST(test_big_to_small_type_cast());
+   CALL_SUBTEST(test_small_to_big_type_cast());
 }
-- 
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