Fix arithmetic for Temperature

UnitsNet.Tests/CustomCode/TemperatureDeltaTests.cs

@@ -0,0 +1,56 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated (once) by \generate-code.bat, but will not be
+//     regenerated when it already exists. The purpose of creating this file is to make 
+//     it easier to remember to implement all the unit conversion test cases.
+// 
+//     Whenever a new unit is added to this unit class and \generate-code.bat is run,
+//     the base test class will get a new abstract property and cause a compile error
+//     in this derived class, reminding the developer to implement the test case
+//     for the new unit.
+//
+//     See https://github.com/anjdreas/UnitsNet/wiki/Adding-a-New-Unit for how to add or edit units.
+//
+//     Add CustomCode\UnitClasses\MyUnit.extra.cs files to add code to generated unit classes.
+//     Add Extensions\MyUnitExtensions.cs to decorate unit classes with new behavior.
+//     Add UnitDefinitions\MyUnit.json and run GeneratUnits.bat to generate new units or unit classes.
+//
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+// Copyright (c) 2007 Andreas Gullberg Larsen ([email protected]).
+// https://github.com/anjdreas/UnitsNet
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+
+namespace UnitsNet.Tests.CustomCode
+{
+    public class TemperatureDeltaTests : TemperatureDeltaTestsBase
+    {
+        protected override double DegreesCelsiusDeltaInOneKelvinDelta => 1;
+        protected override double DegreesDelisleDeltaInOneKelvinDelta => -1.5d;
+        protected override double DegreesFahrenheitDeltaInOneKelvinDelta => 1.8;
+        protected override double DegreesNewtonDeltaInOneKelvinDelta => 0.33d;
+        protected override double DegreesRankineDeltaInOneKelvinDelta => 1.8;
+        protected override double DegreesReaumurDeltaInOneKelvinDelta => 0.8;
+        protected override double DegreesRoemerDeltaInOneKelvinDelta => 21/40d;
+        protected override double KelvinsDeltaInOneKelvinDelta => 1;
+    }
+}

UnitsNet.Tests/CustomCode/TemperatureTests.cs

@@ -1,4 +1,4 @@
-// Copyright(c) 2007 Andreas Gullberg Larsen
+// Copyright © 2007 Andreas Gullberg Larsen ([email protected]).
 // https://github.com/anjdreas/UnitsNet
 // 
 // Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -19,6 +19,11 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using NUnit.Framework;
+using UnitsNet.Units;
+
 namespace UnitsNet.Tests.CustomCode
 {
     public class TemperatureTests : TemperatureTestsBase
@@ -38,5 +43,92 @@ public class TemperatureTests : TemperatureTestsBase
         protected override double DegreesRoemerInOneKelvin => -135.378750000;
 
         protected override double KelvinsInOneKelvin => 1;
+
+        [SuppressMessage("ReSharper", "ImpureMethodCallOnReadonlyValueField",
+            Justification = "R# incorrectly identifies method as impure, due to internal method calls.")]
+        [TestCase(TemperatureUnit.DegreeCelsius, 10, 1, ExpectedResult = "10 °C")]
+        [TestCase(TemperatureUnit.DegreeCelsius, 10, 5, ExpectedResult = "2 °C")]
+        [TestCase(TemperatureUnit.DegreeCelsius, 10, -10, ExpectedResult = "-1 °C")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, 10, 1, ExpectedResult = "10 °F")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, 10, 5, ExpectedResult = "2 °F")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, 10, -10, ExpectedResult = "-1 °F")]
+        public string DividedByTemperatureDeltaEqualsTemperature(TemperatureUnit unit, int temperatureVal, int divisor)
+        {
+            Temperature temperature = Temperature.From(temperatureVal, unit);
+
+            // Act
+            Temperature resultTemp = temperature.Divide(divisor, unit);
+
+            return resultTemp.ToString(unit, CultureInfo.InvariantCulture, "{0:0} {1}");
+        }
+
+        [SuppressMessage("ReSharper", "ImpureMethodCallOnReadonlyValueField",
+            Justification = "R# incorrectly identifies method as impure, due to internal method calls.")]
+        [TestCase(TemperatureUnit.DegreeCelsius, 10, 0, ExpectedResult = "0 °C")]
+        [TestCase(TemperatureUnit.DegreeCelsius, 10, 5, ExpectedResult = "50 °C")]
+        [TestCase(TemperatureUnit.DegreeCelsius, 10, -5, ExpectedResult = "-50 °C")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, 10, 0, ExpectedResult = "0 °F")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, 10, 5, ExpectedResult = "50 °F")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, 10, -5, ExpectedResult = "-50 °F")]
+        public string MultiplyByTemperatureDeltaEqualsTemperature(TemperatureUnit unit, int temperatureVal, int factor)
+        {
+            Temperature temperature = Temperature.From(temperatureVal, unit);
+
+            // Act
+            Temperature resultTemp = temperature.Multiply(factor, unit);
+
+            return resultTemp.ToString(unit, CultureInfo.InvariantCulture, "{0:0} {1}");
+        }
+
+        [TestCase(TemperatureUnit.DegreeCelsius, -10, 0, ExpectedResult = "-10 °C")]
+        [TestCase(TemperatureUnit.DegreeCelsius, -10, 10, ExpectedResult = "0 °C")]
+        [TestCase(TemperatureUnit.DegreeCelsius, -10, 20, ExpectedResult = "10 °C")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, -10, 0, ExpectedResult = "-10 °F")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, -10, 10, ExpectedResult = "0 °F")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, -10, 20, ExpectedResult = "10 °F")]
+        public string TemperatureDeltaPlusTemperatureEqualsTemperature(TemperatureUnit unit, int deltaVal, int temperatureVal)
+        {
+            Temperature temperature = Temperature.From(temperatureVal, unit);
+            TemperatureDelta delta = TemperatureDelta.From(deltaVal, (TemperatureDeltaUnit) unit);
+
+            // Act
+            Temperature resultTemp = delta + temperature;
+
+            return resultTemp.ToString(unit, CultureInfo.InvariantCulture, "{0:0} {1}");
+        }
+
+        [TestCase(TemperatureUnit.DegreeCelsius, 20, 10, ExpectedResult = "10 °C")]
+        [TestCase(TemperatureUnit.DegreeCelsius, 20, 20, ExpectedResult = "0 °C")]
+        [TestCase(TemperatureUnit.DegreeCelsius, 20, 30, ExpectedResult = "-10 °C")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, 20, 10, ExpectedResult = "10 °F")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, 20, 20, ExpectedResult = "0 °F")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, 20, 30, ExpectedResult = "-10 °F")]
+        public string TemperatureMinusTemperatureDeltaEqualsTemperature(TemperatureUnit unit, int temperatureVal, int deltaVal)
+        {
+            Temperature temperature = Temperature.From(temperatureVal, unit);
+            TemperatureDelta delta = TemperatureDelta.From(deltaVal, (TemperatureDeltaUnit) unit);
+
+            // Act
+            Temperature resultTemp = temperature - delta;
+
+            return resultTemp.ToString(unit, CultureInfo.InvariantCulture, "{0:0} {1}");
+        }
+
+        [TestCase(TemperatureUnit.DegreeCelsius, -10, 0, ExpectedResult = "-10 °C")]
+        [TestCase(TemperatureUnit.DegreeCelsius, -10, 10, ExpectedResult = "0 °C")]
+        [TestCase(TemperatureUnit.DegreeCelsius, -10, 20, ExpectedResult = "10 °C")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, -10, 0, ExpectedResult = "-10 °F")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, -10, 10, ExpectedResult = "0 °F")]
+        [TestCase(TemperatureUnit.DegreeFahrenheit, -10, 20, ExpectedResult = "10 °F")]
+        public string TemperaturePlusTemperatureDeltaEqualsTemperature(TemperatureUnit unit, int temperatureVal, int deltaVal)
+        {
+            Temperature temperature = Temperature.From(temperatureVal, unit);
+            TemperatureDelta delta = TemperatureDelta.From(deltaVal, (TemperatureDeltaUnit) unit);
+
+            // Act
+            Temperature resultTemp = temperature + delta;
+
+            return resultTemp.ToString(unit, CultureInfo.InvariantCulture, "{0:0} {1}");
+        }
     }
 }