Move prod code to business logic project

CorrigeTP3.v3.ncrunchsolution.user

@@ -10,5 +10,23 @@
       <ShowIgnoredTestsMenuOption>false</ShowIgnoredTestsMenuOption>
     </TestsWindowMenuOptions>
     <TestsWindowSplitterDistance>50%</TestsWindowSplitterDistance>
+    <TestsWindowTreeLayout>
+      <Column>
+        <Name>Name</Name>
+        <Width>1168</Width>
+      </Column>
+      <Column>
+        <Name>Status</Name>
+        <Width>92</Width>
+      </Column>
+      <Column>
+        <Name>LastExecutionTime</Name>
+        <Width>301</Width>
+      </Column>
+      <Column>
+        <Name>GridNode</Name>
+        <Width>270</Width>
+      </Column>
+    </TestsWindowTreeLayout>
   </Settings>
 </SolutionConfiguration>
\ No newline at end of file

UnitTests/Amount.cs → Credit/Amount.cs

 using System.Runtime.CompilerServices;
+using System.Text.RegularExpressions;
 
-namespace UnitTests;
+namespace Credit;
 
 public record Amount
 {
     public Amount(double value, Currency currency)
     {
         Currency = currency;
-        Value = (int)(value * Math.Pow(10, currency.Precision));
+        Value = (int)(Math.Round(value, Currency.Precision) * Math.Pow(10, currency.Precision));
+    }
+    
+    public Amount(double value)
+    {
+        Currency = Currencies.Euro;
+        Value = (int)(Math.Round( value, Currency.Precision, MidpointRounding.AwayFromZero) * Math.Pow(10, Currency.Precision));
     }
 
     public Amount(int value)
     {
         Value = value;
-        Currency = new Currency("Euro", "EUR", 2);
+        Currency = Currencies.Euro;
     }
     public Amount(int value, Currency currency )
     {
         Value = value;
-        Currency = currency ?? new Currency("Euro", "EUR", 2);
+        Currency = currency ;
     }
 
     public int Value { get; init; } 
@@ -29,6 +36,12 @@ public record Amount
 
 }
 
+public static class Currencies
+{
+
+    public static Currency Euro => new Currency("Euro", "EUR", 2);
+}
+
 public record Currency
 {
     public Currency(string name = "Euro", string isoAlpha = "EUR", int precision = 2)

Credit/CreditSimulator.cs

+namespace Credit;
+
+public class MortgageSimulator
+{
+    public static Amount ComputeMonthlyPayment(Amount borrowedAmount, int durationInMonth, decimal rate)
+    {
+        if (borrowedAmount.Value * (int) Math.Pow(10, borrowedAmount.Currency.Precision) < 5000000) {
+            throw new ArgumentOutOfRangeException(nameof(borrowedAmount), "Can't borrow so little capital.");
+        }
+
+        double numerator = (double)(borrowedAmount * rate / 12);
+        double denominator = 1 - Math.Pow((double)(1  + rate / 12), - durationInMonth);
+        double value = numerator / denominator;
+        
+        return new Amount(value, borrowedAmount.Currency);
+    }
+}
\ No newline at end of file

Credit/obj/Debug/net6.0/nCrunchTemp_87e844a4-38da-4490-bb81-d789eaf46e22.GlobalUsings.g.cs

+// <auto-generated/>
+global using global::System;
+global using global::System.Collections.Generic;
+global using global::System.IO;
+global using global::System.Linq;
+global using global::System.Net.Http;
+global using global::System.Threading;
+global using global::System.Threading.Tasks;

UnitTests/CreditSimulator.cs

-namespace UnitTests;
-
-public class CreditSimulator
-{
-    public static Amount ComputeMonthlyPayment(Amount borrowedAmount, int durationInMonth, double rate)
-    {
-        double numerator = borrowedAmount * rate / 12;
-        double denominator = 1 - Math.Pow((1  + rate / 12), -durationInMonth);
-        double value = numerator / denominator;
-        
-        return new Amount(value, borrowedAmount.Currency);
-    }
-}
\ No newline at end of file

UnitTests/SimulatorTest.cs

+using Credit;
+
+using NFluent;
+
+namespace UnitTests;
+
+public class CreditSimulatorTest
+{
+    [Theory]
+    [InlineData(50000, 250, 0.03d, 269.21d)]
+    [InlineData(100000, 200, 0.02d, 588.37d)]
+    [InlineData(150000, 240, 0.01d, 689.84d)]
+    public void ShouldComputeMensuality(int initalAmount, int durationInMonth, decimal rate, double expectedValue)
+    {
+        Amount borrowedAmount = new Amount( initalAmount);
+        var result = MortgageSimulator.ComputeMonthlyPayment(borrowedAmount, durationInMonth, rate);
+
+        Check.That(new Amount(Math.Round(expectedValue, 2, MidpointRounding.AwayFromZero))).IsEqualTo(result);
+    }
+
+    [Fact]
+    public void ShouldNotBeInferiorTo50k()
+    {
+        Check.ThatCode(() => MortgageSimulator.ComputeMonthlyPayment(borrowedAmount: 49999, 55, 1))
+             .Throws<ArgumentOutOfRangeException>()
+             .WithMessage("Can't borrow so little capital. (Parameter 'borrowedAmount')");
+    }
+}
\ No newline at end of file

UnitTests/UnitTest1.cs

-using NFluent;
-
-namespace UnitTests;
-
-public class CreditSimulatorTest
-{
-    [Theory]
-    [InlineData(50000, 250, 0.03d, 26921)]
-    [InlineData(100000, 200, 0.02d, 58836)]
-    [InlineData(5000, 12, 0.01d, 41892)]
-    public void ShouldComputeMensuality(int initalAmount, int durationInMonth, double rate, int expectedValue)
-    {
-        Amount borrowedAmount = new Amount( initalAmount, new Currency("Euro", "EUR", 2));
-        var result = CreditSimulator.ComputeMonthlyPayment(borrowedAmount, durationInMonth, rate);
-
-        Check.That(result).IsEqualTo(new Amount(expectedValue, borrowedAmount.Currency));
-
-    }
-}
\ No newline at end of file

UnitTests/UnitTests.csproj

@@ -22,4 +22,8 @@
     </PackageReference>
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\Credit\Credit.csproj" />
+  </ItemGroup>
+
 </Project>

UnitTests/obj/Debug/net6.0/nCrunchTemp_18f512ab-81eb-45aa-9349-4228e08a369c.GlobalUsings.g.cs

+// <auto-generated/>
+global using global::System;
+global using global::System.Collections.Generic;
+global using global::System.IO;
+global using global::System.Linq;
+global using global::System.Net.Http;
+global using global::System.Threading;
+global using global::System.Threading.Tasks;

UnitTests/obj/Debug/net6.0/nCrunchTemp_6fbeb263-e4e5-46d6-9212-90375d4ef4d4.GlobalUsings.g.cs

+// <auto-generated/>
+global using global::System;
+global using global::System.Collections.Generic;
+global using global::System.IO;
+global using global::System.Linq;
+global using global::System.Net.Http;
+global using global::System.Threading;
+global using global::System.Threading.Tasks;