using DTS.SensorDB;
using NUnit.Framework;
using System;

namespace SensorDB.Tests
{
    [TestFixture]
    public class SensorCalibrationShould
    {
        [Test]
        public void IsCompatibleWithIEPE_ShouldReturnFalse_WhenSensorProportionalIsTrue()
        {
            //Arange
            SensorCalibration sut = new SensorCalibration();
            sut.IsProportional = true;

            //Act
            var compatibleWithIEPE = sut.IsCompatibleWithIEPE();

            //Assert
            Assert.That(compatibleWithIEPE, Is.EqualTo(false));
        }

        [Test]
        public void IsCompatibleWithIEPE_ShouldReturnFalse_WhenSensorIsNonLinear()
        {
            //Arange
            SensorCalibration sut = new SensorCalibration();
            sut.NonLinear = true;

            //Act
            var compatibleWithIEPE = sut.IsCompatibleWithIEPE();

            //Assert
            Assert.That(compatibleWithIEPE, Is.EqualTo(false));
        }

        [Test]
        public void IsCompatibleWithIEPE_ShouldReturnTrue()
        {
            //Arange
            SensorCalibration sut = new SensorCalibration();
            sut.NonLinear = false;
            sut.IsProportional = false;

            //Act
            var compatibleWithIEPE = sut.IsCompatibleWithIEPE();

            //Assert
            Assert.That(compatibleWithIEPE, Is.EqualTo(true));

        }

        [Test]
        public void ToNonLinearDisplayString_ShouldReturnEmpty_WhenNonLinearIsFalse()
        {
            //Arange
            SensorCalibration sut = new SensorCalibration();
            sut.NonLinear = false;

            //Act
            var compatibleWithIEPE = sut.ToNonLinearDisplayString("Test", false);

            //Assert
            Assert.That(compatibleWithIEPE, Is.Empty);
        }

        [Test]
        public void ToNonLinearDisplayString_ShouldReturnEmpty_WhenNonLinearFormatIsNull()
        {
            //Arange
            SensorCalibration sut = new SensorCalibration();
            sut.NonLinear = true;

            //Act
            var compatibleWithIEPE = sut.ToNonLinearDisplayString(null, false);

            //Assert
            Assert.That(compatibleWithIEPE, Is.Empty);
        }

        [Test]
        public void CompareTo_ShouldReturn1_ComparedWithNull()
        {
            //Arange
            SensorCalibration sut = new SensorCalibration();

            //Act
            var compatibleWithIEPE = sut.CompareTo(null);

            //Assert
            Assert.That(compatibleWithIEPE, Is.EqualTo(1));
        }

        [Test]
        public void CompareTo_ShouldReturn0_WhenObjectsHaveSameCalibrationDates()
        {
            //Arange
            var now = DateTime.Now;
            SensorCalibration sut = new SensorCalibration();
            sut.CalibrationDate = now;

            //Act
            var secondObjectDate = new SensorCalibration();
            secondObjectDate.CalibrationDate = now;
            var compatibleWithIEPE = sut.CompareTo(secondObjectDate);

            //Assert
            Assert.That(compatibleWithIEPE, Is.EqualTo(0));

        }

        [Test]
        public void CompareTo_ShouldReturnNegative_WhenObjectsHaveDifferentCalibrationDates()
        {
            //Arange
            var now = DateTime.Now;
            SensorCalibration sut = new SensorCalibration();
            sut.CalibrationDate = now;

            //Act
            var secondObjectDate = new SensorCalibration();
            secondObjectDate.CalibrationDate = now.AddDays(-1);
            var compatibleWithIEPE = sut.CompareTo(secondObjectDate);

            //Assert
            Assert.That(compatibleWithIEPE, Is.Not.EqualTo(0));
        }
    }
}