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:
  virtual char do_decimal_point() const { 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();
}