LongitudeTests.cpp

#include <gtest/gtest.h>

#include "Longitude.h"
#include "SpecialPixel.h"

using namespace Isis;

// ----- Testing Constructors -----
// Default constructor
TEST(Longitude, DefaultConstructor) {
  Longitude lon;
  EXPECT_EQ(Isis::Null, lon.degrees());    
}

// Constructor given a value in degrees
TEST(Longitude, DegreesConstructor) {
  Longitude lon(180.0, Angle::Degrees);
  EXPECT_EQ(180, lon.degrees());    
}


// Constructor given a positive west value in degrees
TEST(Longitude, PositiveWest) {
  Longitude lon(180.0, Angle::Degrees, Longitude::PositiveWest);
  EXPECT_EQ(180, lon.degrees());    
}

// Constructor given a positive west, -90 value in degrees
TEST(Longitude, PWNegative90) {
  Longitude lon(-90.0, Angle::Degrees, Longitude::PositiveWest, 
        Longitude::Domain180);
  EXPECT_EQ(90, lon.degrees());    
}

// Constructor given -90 degrees PW & 360 domain
TEST(Longitude, PW360Domain) {
  Longitude lon(-90.0, Angle::Degrees, Longitude::PositiveWest,
        Longitude::Domain360);
  EXPECT_EQ(450, lon.degrees());
}

// Copy constructor
TEST(Longitude, CopyConstructor) {
  Longitude lon(90.0, Angle::Degrees);
  EXPECT_EQ(lon.degrees(), Longitude(lon).degrees());

  Longitude lonCopy(lon);
  lonCopy = lon;
  EXPECT_EQ(90, lonCopy.degrees());
}

// ----- Testing Set Methods -----
// Set to 90 degrees
TEST(Longitude, Set90Degrees) {
  Longitude lon(270.0, Angle::Degrees);
  lon.setPositiveEast(90, Angle::Degrees);
  EXPECT_EQ(90, lon.degrees());
}

// Set to 90 degrees PW
TEST(Longitude, Set90DegreesPW) {
  Longitude lon(270.0, Angle::Degrees);
  lon.setPositiveWest(90, Angle::Degrees);
  EXPECT_EQ(270, lon.degrees());
}

// ----- Testing Get Methods -----
TEST(Longitude, Get90Degrees) {
  Longitude lon(90.0, Angle::Degrees);

  // degrees universal
  EXPECT_EQ(90, lon.degrees());

  // degrees positive east
  EXPECT_EQ(90, lon.positiveEast(Angle::Degrees));

  // radians positive east
  EXPECT_EQ(0.5, lon.positiveEast(Angle::Radians) / PI);

  // degrees positive west
  EXPECT_EQ(270, lon.positiveWest(Angle::Degrees));

  // radians positive west
  EXPECT_EQ(1.5, lon.positiveWest(Angle::Radians) / PI);
}

TEST(Longitude, Get450Degrees) {
  Longitude lon(450.0, Angle::Degrees);

  // degrees universal
  EXPECT_EQ(450, lon.degrees());

  // degrees positive east
  EXPECT_EQ(450, lon.positiveEast(Angle::Degrees));

  // radians positive east
  EXPECT_EQ(2.5, lon.positiveEast(Angle::Radians) / PI);

  // degrees positive west
  EXPECT_EQ(-90, lon.positiveWest(Angle::Degrees));

  // radians positive west
  EXPECT_EQ(-0.5, lon.positiveWest(Angle::Radians) / PI);
}

TEST(Longitude, GetNegative450Degrees) {
  Longitude lon(-450.0, Angle::Degrees);

  // degrees universal
  EXPECT_EQ(-450, lon.degrees());

  // degrees positive east
  EXPECT_EQ(-450, lon.positiveEast(Angle::Degrees));

  // radians positive east
  EXPECT_EQ(-2.5, lon.positiveEast(Angle::Radians) / PI);

  // degrees positive west
  EXPECT_EQ(810, lon.positiveWest(Angle::Degrees));

  // radians positive west
  EXPECT_EQ(4.5, lon.positiveWest(Angle::Radians) / PI);
}

TEST(Longitude, GetNegative450DegreesPW) {
  Longitude lon(-450.0, Angle::Degrees, Longitude::PositiveWest);

  // degrees universal
  EXPECT_EQ(810, lon.degrees());

  // degrees positive east
  EXPECT_EQ(810, lon.positiveEast(Angle::Degrees));

  // radians positive east
  EXPECT_EQ(4.5, lon.positiveEast(Angle::Radians) / PI);

  // degrees positive west
  EXPECT_EQ(-450, lon.positiveWest(Angle::Degrees));

  // radians positive west
  EXPECT_EQ(-2.5, lon.positiveWest(Angle::Radians) / PI);
}

// ----- Testing Domain Methods -----
TEST(Longitude, ForceDomain) {
  Longitude lon(270.0, Angle::Degrees);

  // Test force180Domain
  EXPECT_EQ(-90, lon.force180Domain().degrees());

  // Test force360Domain
  EXPECT_EQ(270, lon.force360Domain().degrees());

  // Force 360 to the 360 domain
  lon.setPositiveEast(360.0, Angle::Degrees);
  EXPECT_EQ(360, lon.force360Domain().degrees());

}

// ----- Testing Range Methods -----

TEST(Longitude, InRange) {

  Longitude lon(45.0, Angle::Degrees);

  EXPECT_TRUE(lon.inRange(Longitude(0, Angle::Degrees), Longitude(360, Angle::Degrees)));
  EXPECT_FALSE(lon.inRange(Longitude(360, Angle::Degrees), Longitude(0, Angle::Degrees)));
  EXPECT_FALSE(lon.inRange(Longitude(350, Angle::Degrees), Longitude(355, Angle::Degrees)));
  EXPECT_TRUE(lon.inRange(Longitude(0, Angle::Degrees), Longitude(160, Angle::Degrees)));
  EXPECT_FALSE(lon.inRange(Longitude(0, Angle::Degrees), Longitude(44, Angle::Degrees)));
  EXPECT_FALSE(lon.inRange(Longitude(46, Angle::Degrees), Longitude(90, Angle::Degrees)));
  EXPECT_TRUE(lon.inRange(Longitude(0, Angle::Degrees), Longitude(45, Angle::Degrees)));
  EXPECT_TRUE(lon.inRange(Longitude(45, Angle::Degrees), Longitude(90, Angle::Degrees)));
}