Add formula to compute electric charge (#810)

Author: Pentiva

UnitsNet.Tests/CustomCode/DurationTests.cs

@@ -181,5 +181,12 @@ public void DurationFromStringUsingMultipleAbbreviationsParsedCorrectly(string t
 
             AssertEx.EqualTolerance(expectedSeconds, Duration.Parse(textValue, cultureInfo).Seconds, SecondsTolerance);
         }
+
+        [Fact]
+        public void DurationMultipliedByElectricCurrentEqualsElectricCharge()
+        {
+            ElectricCharge ah = Duration.FromHours(5) * ElectricCurrent.FromAmperes(4);
+            Assert.Equal(20, ah.AmpereHours);
+        }
     }
 }

UnitsNet.Tests/CustomCode/ElectricChargeTests.cs

@@ -1,27 +1,7 @@
-//------------------------------------------------------------------------------
-// <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 quantity 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/angularsen/UnitsNet/wiki/Adding-a-New-Unit for how to add or edit units.
-//
-//     Add CustomCode\Quantities\MyQuantity.extra.cs files to add code to generated quantities.
-//     Add UnitDefinitions\MyQuantity.json and run GeneratUnits.bat to generate new units or quantities.
-//
-// </auto-generated>
-//------------------------------------------------------------------------------
-
-// Licensed under MIT No Attribution, see LICENSE file at the root.
+// Licensed under MIT No Attribution, see LICENSE file at the root.
 // Copyright 2013 Andreas Gullberg Larsen ([email protected]). Maintained at https://github.com/angularsen/UnitsNet.
 
-
-using System;
+using Xunit;
 
 namespace UnitsNet.Tests.CustomCode
 {
@@ -32,5 +12,19 @@ public class ElectricChargeTests : ElectricChargeTestsBase
         protected override double AmpereHoursInOneCoulomb => 2.77777777777e-4;
         protected override double KiloampereHoursInOneCoulomb => 2.77777777777e-7;
         protected override double MegaampereHoursInOneCoulomb => 2.77777777777e-10;
+
+        [Fact]
+        public void ElectricChargeDividedByElectricCurrentEqualsDuration()
+        {
+            Duration t = ElectricCharge.FromAmpereHours(20) / ElectricCurrent.FromAmperes(5);
+            Assert.Equal(4, t.Hours);
+        }
+
+        [Fact]
+        public void ElectricChargeDividedByDurationEqualsElectricCurrent()
+        {
+            ElectricCurrent i = ElectricCharge.FromAmpereHours(20) / Duration.FromHours(4);
+            Assert.Equal(5, i.Amperes);
+        }
     }
 }

UnitsNet.Tests/CustomCode/ElectricCurrentTests.cs

@@ -41,5 +41,12 @@ public void ElectricCurrentMultipliedByElectricPotentialEqualsPower()
             Power p = ElectricCurrent.FromAmperes(2) * ElectricPotential.FromVolts(10);
             Assert.Equal(20, p.Watts);
         }
+
+        [Fact]
+        public void ElectricCurrentMultipliedByDurationEqualsElectricCharge()
+        {
+            ElectricCharge ah = ElectricCurrent.FromAmperes(4) * Duration.FromHours(5);
+            Assert.Equal(20, ah.AmpereHours);
+        }
     }
 }

UnitsNet/CustomCode/Quantities/Duration.extra.cs

@@ -97,5 +97,11 @@ public static explicit operator Duration(TimeSpan duration)
         {
             return Volume.FromCubicMeters(volumeFlow.CubicMetersPerSecond * duration.Seconds);
         }
+
+        /// <summary>Calculate <see cref="ElectricCharge"/> from <see cref="Duration"/> multiplied by <see cref="ElectricCurrent"/>.</summary>
+        public static ElectricCharge operator *(Duration time, ElectricCurrent current)
+        {
+            return ElectricCharge.FromAmpereHours(current.Amperes * time.Hours);
+        }
     }
 }

UnitsNet/CustomCode/Quantities/ElectricCharge.extra.cs

@@ -0,0 +1,20 @@
+// Licensed under MIT No Attribution, see LICENSE file at the root.
+// Copyright 2013 Andreas Gullberg Larsen ([email protected]). Maintained at https://github.com/angularsen/UnitsNet.
+
+namespace UnitsNet
+{
+    public partial struct ElectricCharge
+    {
+        /// <summary>Get <see cref="ElectricCurrent"/> from <see cref="ElectricCharge"/> divided by <see cref="Duration"/>.</summary>
+        public static ElectricCurrent operator /(ElectricCharge charge, Duration time)
+        {
+            return ElectricCurrent.FromAmperes(charge.AmpereHours / time.Hours);
+        }
+
+        /// <summary>Get <see cref="Duration"/> from <see cref="ElectricCharge"/> divided by <see cref="ElectricCurrent"/>.</summary>
+        public static Duration operator /(ElectricCharge charge, ElectricCurrent current)
+        {
+            return Duration.FromHours(charge.AmpereHours / current.Amperes);
+        }
+    }
+}

UnitsNet/CustomCode/Quantities/ElectricCurrent.extra.cs

@@ -18,5 +18,11 @@ public partial struct ElectricCurrent
         {
             return Power.FromWatts(potential.Volts * current.Amperes);
         }
+
+        /// <summary>Calculate <see cref="ElectricCharge"/> from <see cref="ElectricCurrent"/> multiplied by <see cref="Duration"/>.</summary>
+        public static ElectricCharge operator *(ElectricCurrent current, Duration time)
+        {
+            return ElectricCharge.FromAmpereHours(current.Amperes * time.Hours);
+        }
     }
 }