#include "tensorflow/core/public/tensor_shape.h"

#include <gtest/gtest.h>

namespace tensorflow {
namespace {

TEST(TensorShapeTest, Default) {
  // The default TensorShape constructor constructs a shape of 0-dim
  // and 1-element.
  TensorShape s;
  EXPECT_EQ(s.dims(), 0);
  EXPECT_EQ(s.num_elements(), 1);
}

TEST(TensorShapeTest, set_dim) {
  TensorShape s({10, 5});

  s.set_dim(0, 20);
  ASSERT_EQ(2, s.dims());
  EXPECT_EQ(20, s.dim_size(0));
  EXPECT_EQ(100, s.num_elements());

  s.set_dim(1, 2);
  ASSERT_EQ(2, s.dims());
  EXPECT_EQ(2, s.dim_size(1));
  EXPECT_EQ(40, s.num_elements());
}

TEST(TensorShapeTest, RemoveDim) {
  TensorShape s({10, 5});
  s.RemoveDim(0);
  EXPECT_EQ(5, s.num_elements());
  ASSERT_EQ(1, s.dims());
}

TEST(TensorShapeTest, RemoveAndAddDim) {
  TensorShape s({10, 5, 20});
  s.RemoveDim(1);
  s.AddDim(100);

  EXPECT_EQ(20000, s.num_elements());
  ASSERT_EQ(3, s.dims());
}

TEST(TensorShapeTest, InvalidShapeProto) {
  TensorShapeProto proto;
  EXPECT_TRUE(TensorShape::IsValid(proto));

  proto.add_dim()->set_size(357);
  proto.add_dim()->set_size(982);
  EXPECT_TRUE(TensorShape::IsValid(proto));

  proto.Clear();
  proto.add_dim()->set_size(-357);
  proto.add_dim()->set_size(-982);
  EXPECT_FALSE(TensorShape::IsValid(proto));

  proto.Clear();
  proto.add_dim()->set_size(1LL << 20);
  proto.add_dim()->set_size((1LL << 20) + 1);
  EXPECT_FALSE(TensorShape::IsValid(proto));
}

TEST(TensorShapeTest, SetDimForEmptyTensor) {
  TensorShape s({10, 5, 20});
  EXPECT_EQ(1000, s.num_elements());
  s.set_dim(1, 0);
  EXPECT_EQ(0, s.num_elements());
  s.set_dim(1, 7);
  EXPECT_EQ(1400, s.num_elements());
}

}  // namespace
}  // namespace tensorflow