uniform_string_stream_test.cpp

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/*
 * Copyright (c) 2012, Willow Garage, Inc.
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#include <locale>

#include <gtest/gtest.h>
#include <rviz/uniform_string_stream.h>

using namespace rviz;

TEST(UniformStringStream, parse_floats)
{
  UniformStringStream uss("1,2 3.4 5,6e2");
  float a, b, c;
  uss.parseFloat(a);
  uss.parseFloat(b);
  uss.parseFloat(c);
  EXPECT_TRUE(!!uss);
  EXPECT_EQ(a, 1.2f);
  EXPECT_EQ(b, 3.4f);
  EXPECT_EQ(c, 560.0f);
  uss.parseFloat(a);
  EXPECT_FALSE(!!uss);
}

TEST(UniformStringStream, parse_ints)
{
  UniformStringStream uss("1 2 -3");
  int a, b, c;
  uss >> a;
  uss >> b;
  uss >> c;
  EXPECT_TRUE(!!uss);
  EXPECT_EQ(a, 1);
  EXPECT_EQ(b, 2);
  EXPECT_EQ(c, -3);
  uss >> a;
  EXPECT_FALSE(!!uss);
}

class CommaFloat : public std::numpunct<char>
{
protected:
  char do_decimal_point() const override
  {
    return 'p';
  }
};

TEST(UniformStringStream, print_floats)
{
  UniformStringStream uss;
  uss << 1.2f;
  EXPECT_EQ(uss.str(), "1.2");

  CommaFloat* comma_float_facet = new CommaFloat;
  std::locale new_locale(std::locale::classic(), comma_float_facet);

  std::locale old_locale = std::locale::global(new_locale);

  // Make sure the comma_float_facet is working.
  std::stringstream ss;
  ss << 3.4f;
  EXPECT_EQ(ss.str(), "3p4");

  // Make sure the float facet gets clobbered within UniformStringStream.
  UniformStringStream uss2;
  uss2 << 3.4f;
  EXPECT_EQ(uss2.str(), "3.4");

  // Put things back to normal so other tests don't break.
  std::locale::global(old_locale);
}

int main(int argc, char** argv)
{
  testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}