diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..1ff0c423
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,63 @@
+###############################################################################
+# Set default behavior to automatically normalize line endings.
+###############################################################################
+* text=auto
+
+###############################################################################
+# Set default behavior for command prompt diff.
+#
+# This is need for earlier builds of msysgit that does not have it on by
+# default for csharp files.
+# Note: This is only used by command line
+###############################################################################
+#*.cs diff=csharp
+
+###############################################################################
+# Set the merge driver for project and solution files
+#
+# Merging from the command prompt will add diff markers to the files if there
+# are conflicts (Merging from VS is not affected by the settings below, in VS
+# the diff markers are never inserted). Diff markers may cause the following
+# file extensions to fail to load in VS. An alternative would be to treat
+# these files as binary and thus will always conflict and require user
+# intervention with every merge. To do so, just uncomment the entries below
+###############################################################################
+#*.sln merge=binary
+#*.csproj merge=binary
+#*.vbproj merge=binary
+#*.vcxproj merge=binary
+#*.vcproj merge=binary
+#*.dbproj merge=binary
+#*.fsproj merge=binary
+#*.lsproj merge=binary
+#*.wixproj merge=binary
+#*.modelproj merge=binary
+#*.sqlproj merge=binary
+#*.wwaproj merge=binary
+
+###############################################################################
+# behavior for image files
+#
+# image files are treated as binary by default.
+###############################################################################
+#*.jpg binary
+#*.png binary
+#*.gif binary
+
+###############################################################################
+# diff behavior for common document formats
+#
+# Convert binary document formats to text before diffing them. This feature
+# is only available from the command line. Turn it on by uncommenting the
+# entries below.
+###############################################################################
+#*.doc diff=astextplain
+#*.DOC diff=astextplain
+#*.docx diff=astextplain
+#*.DOCX diff=astextplain
+#*.dot diff=astextplain
+#*.DOT diff=astextplain
+#*.pdf diff=astextplain
+#*.PDF diff=astextplain
+#*.rtf diff=astextplain
+#*.RTF diff=astextplain
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..4ce6fdde
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,340 @@
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- Backup*.rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# JetBrains Rider
+.idea/
+*.sln.iml
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
\ No newline at end of file
diff --git a/CashRegister/App.config b/CashRegister/App.config
new file mode 100644
index 00000000..91de34f1
--- /dev/null
+++ b/CashRegister/App.config
@@ -0,0 +1,30 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/CashRegister/CashRegisterSolution.csproj b/CashRegister/CashRegisterSolution.csproj
new file mode 100644
index 00000000..96845f89
--- /dev/null
+++ b/CashRegister/CashRegisterSolution.csproj
@@ -0,0 +1,137 @@
+
+
+
+
+
+
+
+ Debug
+ AnyCPU
+ {04F488D6-CA12-4DFB-98F8-6242A6CB1668}
+ Exe
+ CashRegister
+ CashRegister
+ v4.7.2
+ 512
+ true
+ true
+
+
+
+
+ AnyCPU
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ AnyCPU
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+ ..\packages\CommandLineParser.2.7.82\lib\net461\CommandLine.dll
+
+
+ ..\packages\Microsoft.TestPlatform.ObjectModel.16.5.0\lib\net451\Microsoft.TestPlatform.CoreUtilities.dll
+
+
+ ..\packages\Microsoft.TestPlatform.ObjectModel.16.5.0\lib\net451\Microsoft.TestPlatform.PlatformAbstractions.dll
+
+
+ ..\packages\Microsoft.CodeCoverage.16.5.0\lib\net45\Microsoft.VisualStudio.CodeCoverage.Shim.dll
+
+
+ ..\packages\Microsoft.TestPlatform.ObjectModel.16.5.0\lib\net451\Microsoft.VisualStudio.TestPlatform.ObjectModel.dll
+
+
+ ..\packages\MSTest.TestFramework.2.1.0\lib\net45\Microsoft.VisualStudio.TestPlatform.TestFramework.dll
+
+
+ ..\packages\MSTest.TestFramework.2.1.0\lib\net45\Microsoft.VisualStudio.TestPlatform.TestFramework.Extensions.dll
+
+
+ ..\packages\NuGet.Frameworks.5.5.0-preview.2.6382\lib\net472\NuGet.Frameworks.dll
+
+
+
+ ..\packages\System.Buffers.4.5.0\lib\netstandard2.0\System.Buffers.dll
+
+
+ ..\packages\System.Collections.Immutable.1.7.0\lib\netstandard2.0\System.Collections.Immutable.dll
+
+
+
+
+ ..\packages\System.Memory.4.5.3\lib\netstandard2.0\System.Memory.dll
+
+
+
+ ..\packages\System.Numerics.Vectors.4.6.0-preview5.19224.8\lib\net46\System.Numerics.Vectors.dll
+
+
+ ..\packages\System.Reflection.Metadata.1.8.0\lib\netstandard2.0\System.Reflection.Metadata.dll
+
+
+
+ ..\packages\System.Runtime.CompilerServices.Unsafe.4.7.0\lib\netstandard2.0\System.Runtime.CompilerServices.Unsafe.dll
+
+
+ ..\packages\System.Runtime.InteropServices.RuntimeInformation.4.3.0\lib\net45\System.Runtime.InteropServices.RuntimeInformation.dll
+ True
+ True
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them. For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/CashRegister/Internal/Calculation/DataViolations.cs b/CashRegister/Internal/Calculation/DataViolations.cs
new file mode 100644
index 00000000..fbaddb74
--- /dev/null
+++ b/CashRegister/Internal/Calculation/DataViolations.cs
@@ -0,0 +1,28 @@
+namespace CashRegister.Internal.Calculation
+{
+ ///
+ /// Possible data violations
+ /// used to manage error output
+ /// Assumption that these transactions are all purchases
+ /// no returns/credits are handled
+ ///
+ internal class DataViolations
+ {
+ public string Value { get; set; }
+
+ private DataViolations(string value)
+ {
+ Value = value;
+ }
+
+ public static DataViolations TooFewInputs => new DataViolations("Input contains too few items.");
+ public static DataViolations TooManyInputs => new DataViolations("Input contains too many items.");
+ public static DataViolations EmptyInput => new DataViolations("Input cannot be null.");
+ public static DataViolations NonNumeric => new DataViolations("Input cannot contain non numeric items.");
+ public static DataViolations InsufficentTendered => new DataViolations("Amount tendered is less than cost.");
+ public static DataViolations CostNegative => new DataViolations("Cost of transaction cannot be negative.");
+ public static DataViolations TenderedNegative => new DataViolations("Amount tendered cannot be negative.");
+
+ public static DataViolations ExeceededcalculableLimits => new DataViolations("The transaction exceeds the calculation limits of the system.");
+ }
+}
\ No newline at end of file
diff --git a/CashRegister/Internal/Calculation/Transaction.cs b/CashRegister/Internal/Calculation/Transaction.cs
new file mode 100644
index 00000000..18f1aed7
--- /dev/null
+++ b/CashRegister/Internal/Calculation/Transaction.cs
@@ -0,0 +1,200 @@
+using System;
+using System.Collections.Generic;
+using CashRegister.Internal.Financial;
+
+namespace CashRegister.Internal.Calculation
+{
+ ///
+ /// Transaction Class
+ ///
+ public class Transaction
+ {
+ private decimal cost;
+ private decimal tendered;
+ private DataViolations violation;
+ private string RawInput { get; }
+ public List Change { get; private set; }
+
+ ///
+ /// Initializes a new instance of the class.
+ ///
+ /// The input.
+ public Transaction(string input)
+ {
+ RawInput = input;
+ Change = new List();
+ ValidateInput();
+ }
+
+ ///
+ /// Validates the input.
+ ///
+ private void ValidateInput()
+ {
+ if (RawInput == null) //checking for null
+ {
+ violation = DataViolations.EmptyInput;
+ }
+ else
+ {
+ string[] split = RawInput.Split(',');
+
+ if (split.Length != 2) //checking for input count violations
+ {
+ violation = split.Length < 2 ? DataViolations.TooFewInputs : DataViolations.TooManyInputs;
+ }
+ else if (!decimal.TryParse(split[0], out cost) || !decimal.TryParse(split[1], out tendered)) //checking for non numbers
+ {
+ violation = DataViolations.NonNumeric;
+ }
+ else if (cost < 0) //checking for negative cost input
+ {
+ violation = DataViolations.CostNegative;
+ }
+ else if (tendered < 0) //checking for negative tendered input
+ {
+ violation = DataViolations.TenderedNegative;
+ }
+ else if (cost > tendered) //checking for insufficient tendered funds
+ {
+ violation = DataViolations.InsufficentTendered;
+ }
+ else if(cost > (int.MaxValue) || tendered > (int.MaxValue))
+ {
+ violation = DataViolations.ExeceededcalculableLimits;
+ }
+ else
+ {
+ violation = null; //all clear
+ }
+ }
+ }
+
+ ///
+ /// Generates the output of change due or various errors
+ /// If no violations have been tripped - figure out currency denominations for return
+ /// If change due is divisible by 3 Mod3ChangeGeneration will be called.
+ /// Otherwise change is given as optimally as possible.
+ ///
+ /// The region currency.
+ /// random seed
+ /// if set to true [randomize all change]. otherwise randomizes decimal value only
+ internal void GenerateChange(IRegionCurrency regionCurrency, Random r, bool randomizeAllChange)
+ {
+ if (violation == null)
+ {
+ Change.Clear();
+ decimal changeValue = Math.Round(tendered - cost, 2, MidpointRounding.AwayFromZero);
+ string[] stringSplit = changeValue.ToString().Split('.');
+ int x = stringSplit.Length > 1 ? int.Parse(stringSplit[1]) : 0;
+ if (x % 3 == 0)
+ {
+ //wasn't sure if all money due back should be subject to random behavior
+ //or just the decimal value - I implemented both;
+ if (randomizeAllChange)
+ {
+ Change = Mod3ChangeGeneration(changeValue, regionCurrency, r);
+ }
+ else//randomizes decimal value only.
+ {
+ Change = OptimizedChangeReturned(decimal.Parse(stringSplit[0]), regionCurrency);
+ Change.AddRange(Mod3ChangeGeneration(decimal.Parse(string.Format("0.{0}", x)), regionCurrency, r));
+ }
+ }
+ else
+ {
+ Change = OptimizedChangeReturned(changeValue, regionCurrency);
+ }
+ }
+ else
+ {
+ Change.Add(string.Format("Error with input ({0}):", RawInput));
+ Change.Add(violation.Value);
+ }
+ }
+
+ ///
+ /// Optimizes the change returned.
+ /// Gives the most efficient change back possible.
+ ///
+ /// The change value.
+ /// The region currency.
+ ///
+ private List OptimizedChangeReturned(decimal changeValue, IRegionCurrency regionCurrency)
+ {
+ List toReturn = new List();
+ foreach (var c in regionCurrency.GetDescendingOrderedCurrencies())
+ {
+ if (c.Value <= changeValue)
+ {
+ int times = (int)(changeValue / c.Value);
+ toReturn.Add(string.Format("{0} {1}", times, times > 1 ? c.PluralName : c.Name));
+ changeValue -= (times * c.Value);
+ }
+ }
+ return toReturn;
+ }
+
+ ///
+ /// If the change due is divisible by 3, give random denominations
+ /// these random denominations must equal the appropriate total amount
+ /// of change due
+ ///
+ /// The change value.
+ /// The region currency.
+ /// The random seed
+ ///
+ private List Mod3ChangeGeneration(decimal changeValue, IRegionCurrency regionCurrency, Random r)
+ {
+ Dictionary changeDue = new Dictionary();
+ List toReturn = new List();
+ foreach (Currency c in regionCurrency.Denominations)
+ {
+ changeDue.Add(c, 0);
+ }
+ while (changeValue > 0)
+ {
+ Currency tmp = regionCurrency.Denominations[r.Next(regionCurrency.Denominations.Count)];
+
+ if (changeValue >= tmp.Value)
+ {
+ try
+ {
+ int maxNumberOfTimes = (int)(changeValue / tmp.Value) + 1; //adding 1 because random max is exclusive
+ int actualTimes = r.Next(maxNumberOfTimes);
+ changeDue[tmp] += actualTimes;
+ changeValue -= (actualTimes * tmp.Value);
+ }
+ catch (OverflowException)
+ {
+ //eat the overflow exception and try again
+ //this happens when the initial change amount due is at or near the limit for Int32
+ //and we try to generate change using something less than 1 ex: a nickel.
+ //allow the system to try larger denominations to reduce the total change due being tracked
+ }
+
+ }
+ }
+ //populate the change denominations to return
+ foreach (Currency c in regionCurrency.GetDescendingOrderedCurrencies())
+ {
+ if (changeDue[c] > 0)
+ {
+ toReturn.Add(string.Format("{0} {1}", changeDue[c], changeDue[c] > 1 ? c.PluralName : c.Name));
+ }
+ }
+ return toReturn;
+ }
+
+ ///
+ /// Overrides ToString()
+ ///
+ ///
+ /// A that represents this instance.
+ ///
+ public override string ToString()
+ {
+ return string.Join(", ", Change);
+ }
+ }
+}
\ No newline at end of file
diff --git a/CashRegister/Internal/Calculation/TransactionProcessor.cs b/CashRegister/Internal/Calculation/TransactionProcessor.cs
new file mode 100644
index 00000000..15ed26e7
--- /dev/null
+++ b/CashRegister/Internal/Calculation/TransactionProcessor.cs
@@ -0,0 +1,112 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using CashRegister.Internal.Financial;
+
+namespace CashRegister.Internal.Calculation
+{
+ ///
+ /// Houses the main function for reading, processing and writing output
+ ///
+ internal static class TransactionProcessor
+ {
+ ///
+ /// Processes the transactions.
+ ///
+ /// The input file.
+ /// The output file.
+ /// The data dump threshold.
+ /// if set to true [randomize all change].
+ /// The region currency.
+ ///
+ public static bool ProcessTransactions(string inputFile, string outputFile, int dataDumpThreshold, bool randomizeAllChange, IRegionCurrency regionCurrency)
+ {
+ if (regionCurrency == null)
+ {
+ return false;
+ }
+ //book-keeping
+ int start = 0;
+ int dataDumpOffset = 0;
+ //number of lines to read at once
+ int take = 50000;
+ Mutex _m = new Mutex();
+ Dictionary transactions = new Dictionary();
+ while (true)
+ {
+ string[] v = null;
+ try
+ {
+ v = File.ReadLines(inputFile).Skip(start).Take(take).ToArray();
+ }
+ catch (Exception e)
+ {
+ Console.WriteLine(e.Message);
+ return false;
+ }
+ //using Parallel.ForEach for increased performance when calculating change
+ Parallel.ForEach(v, (s, x, i) =>
+ {
+ Transaction tmp = new Transaction(s);
+ tmp.GenerateChange(regionCurrency, new Random(Guid.NewGuid().GetHashCode()), randomizeAllChange);
+ int index = (int)i + start;
+ _m.WaitOne();
+ transactions.Add(index, tmp);
+ _m.ReleaseMutex();
+ });
+ //section to write transaction data to disk - preventing out of memory issues
+ if (transactions.Count % dataDumpThreshold == 0)
+ {
+ try
+ {
+ using (StreamWriter writer = new StreamWriter(outputFile, append: true))
+ {
+ int offset = dataDumpThreshold * dataDumpOffset;
+ for (int i = 0; i < transactions.Count; i++)
+ {
+ writer.WriteLine(transactions[i + offset].ToString());
+ }
+ }
+ }
+ catch (Exception e)
+ {
+ Console.WriteLine(e.Message);
+ return false;
+ }
+ transactions.Clear();
+ dataDumpOffset++;
+ }
+ start += take;
+ if (v.Length < take)
+ {
+ break;
+ }
+ }
+ if (transactions.Count > 0)//write the remaining transactions
+ {
+ try
+ {
+ using (StreamWriter writer = new StreamWriter(outputFile, append: true))
+ {
+ int offset = dataDumpThreshold * dataDumpOffset;
+ for (int i = 0; i < transactions.Count; i++)
+ {
+ writer.WriteLine(transactions[i + offset].ToString());
+ }
+ }
+ }
+ catch (Exception e)
+ {
+ Console.WriteLine(e.Message);
+ return false;
+ }
+ }
+ return true;
+ }
+
+ }
+}
diff --git a/CashRegister/Internal/Financial/Currency.cs b/CashRegister/Internal/Financial/Currency.cs
new file mode 100644
index 00000000..e1bb4cfb
--- /dev/null
+++ b/CashRegister/Internal/Financial/Currency.cs
@@ -0,0 +1,16 @@
+namespace CashRegister.Internal.Financial
+{
+ internal class Currency
+ {
+ public string Name { get; }
+ public string PluralName { get; }
+ public decimal Value { get; }
+
+ public Currency(string name, string plural, decimal value)
+ {
+ Name = name;
+ PluralName = plural;
+ Value = value;
+ }
+ }
+}
\ No newline at end of file
diff --git a/CashRegister/Internal/Financial/IRegionCurrency.cs b/CashRegister/Internal/Financial/IRegionCurrency.cs
new file mode 100644
index 00000000..681241cc
--- /dev/null
+++ b/CashRegister/Internal/Financial/IRegionCurrency.cs
@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+
+namespace CashRegister.Internal.Financial
+{
+ /// Interface for Regional Currencies
+ internal interface IRegionCurrency
+ {
+ List Denominations { get; }
+
+ ///
+ /// Gets the descending ordered currencies.
+ ///
+ ///
+ List GetDescendingOrderedCurrencies();
+ }
+}
\ No newline at end of file
diff --git a/CashRegister/Internal/Financial/RegionCurrency/CADCurrency.cs b/CashRegister/Internal/Financial/RegionCurrency/CADCurrency.cs
new file mode 100644
index 00000000..665c862f
--- /dev/null
+++ b/CashRegister/Internal/Financial/RegionCurrency/CADCurrency.cs
@@ -0,0 +1,38 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace CashRegister.Internal.Financial.RegionCurrency
+{
+ ///
+ /// Canadian Dollar implementation of currency
+ ///
+ ///
+ internal class CADCurrency : IRegionCurrency
+ {
+ public List Denominations { get; }
+
+ public CADCurrency()
+ {
+ Denominations = new List
+ {
+ new Currency("penny", "pennies", .01m),
+ new Currency("nickel", "nickels", .05m),
+ new Currency("dime", "dimes", .10m),
+ new Currency("quarter", "quarters", .25m),
+ new Currency("half dollar", "half dollars", .50m),
+ new Currency("loonie", "loonies", 1),
+ new Currency("toonie", "toonies", 2),
+ new Currency("five", "fives", 5),
+ new Currency("ten", "tens", 10),
+ new Currency("twenty", "twenties", 20),
+ new Currency("fifty", "fifties", 50),
+ new Currency("hundred", "hundreds", 100)
+ };
+ }
+
+ public List GetDescendingOrderedCurrencies()
+ {
+ return Denominations.OrderByDescending(x => x.Value).ToList();
+ }
+ }
+}
\ No newline at end of file
diff --git a/CashRegister/Internal/Financial/RegionCurrency/EURCurrency.cs b/CashRegister/Internal/Financial/RegionCurrency/EURCurrency.cs
new file mode 100644
index 00000000..99abc487
--- /dev/null
+++ b/CashRegister/Internal/Financial/RegionCurrency/EURCurrency.cs
@@ -0,0 +1,40 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace CashRegister.Internal.Financial.RegionCurrency
+{
+ ///
+ /// Euro implementation of currency
+ ///
+ ///
+ internal class EURCurrency : IRegionCurrency
+ {
+ public List Denominations { get; }
+
+ public EURCurrency()
+ {
+ Denominations = new List
+ {
+ new Currency("1c", "1c", .01m),
+ new Currency("2c", "2c", .02m),
+ new Currency("5c", "5c", .05m),
+ new Currency("10c", "10c", .10m),
+ new Currency("20c", "20c", .20m),
+ new Currency("50c", "50c", .50m),
+ new Currency("one", "ones", 1),
+ new Currency("two", "twos", 2),
+ new Currency("five", "fives", 5),
+ new Currency("ten", "tens", 10),
+ new Currency("twenty", "twenties", 20),
+ new Currency("hundred", "hundreds", 100),
+ new Currency("two hundred", "two hundreds", 200),
+ new Currency("five hundred", "five hundreds", 500)
+ };
+ }
+
+ public List GetDescendingOrderedCurrencies()
+ {
+ return Denominations.OrderByDescending(x => x.Value).ToList();
+ }
+ }
+}
\ No newline at end of file
diff --git a/CashRegister/Internal/Financial/RegionCurrency/USDCurrency.cs b/CashRegister/Internal/Financial/RegionCurrency/USDCurrency.cs
new file mode 100644
index 00000000..74b87b07
--- /dev/null
+++ b/CashRegister/Internal/Financial/RegionCurrency/USDCurrency.cs
@@ -0,0 +1,36 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace CashRegister.Internal.Financial.RegionCurrency
+{
+ ///
+ /// US Dollar implementation
+ ///
+ ///
+ internal class USDCurrency : IRegionCurrency
+ {
+ public List Denominations { get; }
+
+ public USDCurrency()
+ {
+ Denominations = new List
+ {
+ new Currency("penny", "pennies", .01m),
+ new Currency("nickel", "nickels", .05m),
+ new Currency("dime", "dimes", .10m),
+ new Currency("quarter", "quarters", .25m),
+ new Currency("one", "ones", 1),
+ new Currency("five", "fives", 5),
+ new Currency("ten", "tens", 10),
+ new Currency("twenty", "twenties", 20),
+ new Currency("fifty", "fifties", 50),
+ new Currency("hundred", "hundreds", 100)
+ };
+ }
+
+ public List GetDescendingOrderedCurrencies()
+ {
+ return Denominations.OrderByDescending(x => x.Value).ToList();
+ }
+ }
+}
\ No newline at end of file
diff --git a/CashRegister/Internal/Helpers/CurrencySelector.cs b/CashRegister/Internal/Helpers/CurrencySelector.cs
new file mode 100644
index 00000000..5d2ee909
--- /dev/null
+++ b/CashRegister/Internal/Helpers/CurrencySelector.cs
@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using CashRegister.Internal.Financial;
+using CashRegister.Internal.Financial.RegionCurrency;
+
+namespace CashRegister.Internal.Helpers
+{
+ ///
+ /// Simple helper for setting the currency that will be used
+ /// moves it out of Program
+ ///
+ internal static class CurrencySelector
+ {
+ public static IRegionCurrency GetCurrency()
+ {
+ return GetCurrency(new RegionInfo(System.Threading.Thread.CurrentThread.CurrentUICulture.LCID).ISOCurrencySymbol);
+ }
+
+ public static IRegionCurrency GetCurrency(string toUse)
+ {
+ if (string.IsNullOrEmpty(toUse))
+ {
+ toUse = new RegionInfo(System.Threading.Thread.CurrentThread.CurrentUICulture.LCID).ISOCurrencySymbol;
+ }
+ switch (toUse)
+ {
+ case "USD":
+ return new USDCurrency();
+ case "CAD":
+ return new CADCurrency();
+ case "EUR":
+ return new EURCurrency();
+
+ default:
+ break;
+ }
+ Console.WriteLine(string.Format("{0}: is unsupported currency ISOCode", toUse));
+ return null;
+ }
+ }
+}
diff --git a/CashRegister/Internal/Helpers/TestFileGeneration.cs b/CashRegister/Internal/Helpers/TestFileGeneration.cs
new file mode 100644
index 00000000..aad1f74d
--- /dev/null
+++ b/CashRegister/Internal/Helpers/TestFileGeneration.cs
@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CashRegister.Internal.Helpers
+{
+ ///
+ /// Helper I used to generate
+ ///
+ static class TestFileGeneration
+ {
+ public static bool GenerateTestFile(string fileName, int lines)
+ {
+ string[] badValues = { "", "x,y", "null", "1.23 4.56", "7.89", "NaN,NaN", "null", null, string.Format("5.11, {0}", double.MaxValue)};
+ Random r = new Random();
+ using (StreamWriter writer = new StreamWriter(fileName))
+ {
+ for (int i = 0; i < lines; i++)
+ {
+ if (r.Next(0, 100) % 5 == 0)
+ {
+ writer.WriteLine(badValues[r.Next(0, badValues.Length - 1)]);
+ }
+ else
+ {
+ writer.WriteLine(string.Format("{0:0.00},{1:0.00}", Math.Round(r.Next(0, 10) + r.NextDouble(), 2, MidpointRounding.AwayFromZero), Math.Round(r.Next(10, 20) + r.NextDouble(), 2, MidpointRounding.AwayFromZero)));
+ }
+ }
+ }
+ return File.Exists(fileName);
+ }
+ }
+}
diff --git a/CashRegister/Program.cs b/CashRegister/Program.cs
new file mode 100644
index 00000000..de88dd52
--- /dev/null
+++ b/CashRegister/Program.cs
@@ -0,0 +1,79 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using CashRegister.Internal.Calculation;
+using CashRegister.Internal.Helpers;
+using CommandLine;
+
+namespace CashRegister
+{
+ internal class Program
+ {
+ ///
+ /// Command line parser options;
+ ///
+ public class Options
+ {
+ [Option('i', "inputFile", Required = true, HelpText = "File to be processed.")]
+ public string InputFile { get; set; }
+
+ [Option('o', "outputFile", Required = false, HelpText = "File to write to.")]
+ public string OutputFile { get; set; }
+
+ [Option('r', "randomizeAllChange", Required = false, HelpText = "True: Randomize all change due. False(default): randomize only decimal amount.")]
+ public bool RandomizeAllChange { get; set; }
+
+ [Option('g', "generateInputFile", Required = false, HelpText = "Will generate an input file using inputFile name provided and populate with test data. Default number of rows is 500, set different value with n switch")]
+ public bool GenerateInputFile { get; set; }
+ [Option('n', "numberOfRowsToGenerate", Required = false, HelpText = "Overrides the number of rows created when generating test file")]
+ public int RowsToGenerate { get; set; }
+
+ [Option('c', "currencyISOCode", Required = false, HelpText = "Used to override local currency value for processing.")]
+ public string CurrencyCode { get; set; }
+ }
+ private static void Main(string[] args)
+ {
+ Parser.Default.ParseArguments(args).WithParsed(RunOptions).WithNotParsed(ParseError);
+
+ }
+
+ private static void ParseError(IEnumerable obj)
+ {
+ Console.WriteLine("Invalid command line options given");
+ }
+
+ private static void RunOptions(Options obj)
+ {
+ string inputFile = obj.InputFile;
+ string outputFile = obj.OutputFile;
+ if (outputFile == null)
+ {
+ outputFile = Path.GetDirectoryName(inputFile) + @"\" + Path.GetFileNameWithoutExtension(inputFile) + "_processed.txt";
+ }
+
+ if (obj.GenerateInputFile)
+ {
+ int rowsToGenerate = obj.RowsToGenerate == 0 ? 500 : obj.RowsToGenerate;
+ TestFileGeneration.GenerateTestFile(inputFile, rowsToGenerate);
+ }
+
+
+ //threshold for storing transactions in memory
+ //can be much higher but 100k seemed reasonable
+ //for this exercise.
+ int dataDumpThreshold = 100000;
+
+
+ if (TransactionProcessor.ProcessTransactions(inputFile, outputFile, dataDumpThreshold, obj.RandomizeAllChange, CurrencySelector.GetCurrency(obj.CurrencyCode)))
+ {
+ Console.WriteLine("Finished processing without error");
+ }
+ else
+ {
+ Console.WriteLine("Finished processing with error(s)");
+ }
+ Console.WriteLine("Press any key to end...");
+ Console.ReadKey();
+ }
+ }
+}
\ No newline at end of file
diff --git a/CashRegister/Properties/AssemblyInfo.cs b/CashRegister/Properties/AssemblyInfo.cs
new file mode 100644
index 00000000..6bd303b5
--- /dev/null
+++ b/CashRegister/Properties/AssemblyInfo.cs
@@ -0,0 +1,37 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("CashRegister")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("CashRegister")]
+[assembly: AssemblyCopyright("Copyright © 2020")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: InternalsVisibleTo("CashRegisterTests")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components. If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("04f488d6-ca12-4dfb-98f8-6242a6cb1668")]
+
+// Version information for an assembly consists of the following four values:
+//
+// Major Version
+// Minor Version
+// Build Number
+// Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
\ No newline at end of file
diff --git a/CashRegister/ReadMe.txt b/CashRegister/ReadMe.txt
new file mode 100644
index 00000000..5f282702
--- /dev/null
+++ b/CashRegister/ReadMe.txt
@@ -0,0 +1 @@
+
\ No newline at end of file
diff --git a/CashRegister/packages.config b/CashRegister/packages.config
new file mode 100644
index 00000000..ecd5a089
--- /dev/null
+++ b/CashRegister/packages.config
@@ -0,0 +1,18 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/CashRegisterSolution.sln b/CashRegisterSolution.sln
new file mode 100644
index 00000000..55e2556c
--- /dev/null
+++ b/CashRegisterSolution.sln
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.29806.167
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CashRegisterSolution", "CashRegister\CashRegisterSolution.csproj", "{04F488D6-CA12-4DFB-98F8-6242A6CB1668}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CashRegisterTests", "CashRegisterTests\CashRegisterTests.csproj", "{807B6F2B-2397-45B6-AF56-BB5F5D80CF21}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {04F488D6-CA12-4DFB-98F8-6242A6CB1668}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {04F488D6-CA12-4DFB-98F8-6242A6CB1668}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {04F488D6-CA12-4DFB-98F8-6242A6CB1668}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {04F488D6-CA12-4DFB-98F8-6242A6CB1668}.Release|Any CPU.Build.0 = Release|Any CPU
+ {807B6F2B-2397-45B6-AF56-BB5F5D80CF21}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {807B6F2B-2397-45B6-AF56-BB5F5D80CF21}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {807B6F2B-2397-45B6-AF56-BB5F5D80CF21}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {807B6F2B-2397-45B6-AF56-BB5F5D80CF21}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {695A6EA6-4672-450A-80CA-B91FFB4DF250}
+ EndGlobalSection
+EndGlobal
diff --git a/CashRegisterTests/CashRegisterTests.csproj b/CashRegisterTests/CashRegisterTests.csproj
new file mode 100644
index 00000000..54fcbea4
--- /dev/null
+++ b/CashRegisterTests/CashRegisterTests.csproj
@@ -0,0 +1,107 @@
+
+
+
+ Debug
+ AnyCPU
+ {807B6F2B-2397-45B6-AF56-BB5F5D80CF21}
+ Library
+ Properties
+ CashRegisterTests
+ CashRegisterTests
+ v4.7.2
+ 512
+ {3AC096D0-A1C2-E12C-1390-A8335801FDAB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}
+ 10.0
+ $(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)
+ $(ProgramFiles)\Common Files\microsoft shared\VSTT\$(VisualStudioVersion)\UITestExtensionPackages
+ False
+ UnitTest
+
+
+
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+ ..\packages\Castle.Core.4.4.0\lib\net45\Castle.Core.dll
+
+
+ ..\packages\Moq.4.13.1\lib\net45\Moq.dll
+
+
+
+
+ ..\packages\System.Runtime.CompilerServices.Unsafe.4.5.0\lib\netstandard2.0\System.Runtime.CompilerServices.Unsafe.dll
+
+
+ ..\packages\System.Threading.Tasks.Extensions.4.5.1\lib\netstandard2.0\System.Threading.Tasks.Extensions.dll
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ {04F488D6-CA12-4DFB-98F8-6242A6CB1668}
+ CashRegisterSolution
+
+
+
+
+
+
+
+
+
+
+ False
+
+
+ False
+
+
+ False
+
+
+ False
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/CashRegisterTests/Internal/Calculation/TransactionTests.cs b/CashRegisterTests/Internal/Calculation/TransactionTests.cs
new file mode 100644
index 00000000..e0be8552
--- /dev/null
+++ b/CashRegisterTests/Internal/Calculation/TransactionTests.cs
@@ -0,0 +1,241 @@
+using System;
+using System.Text.RegularExpressions;
+using CashRegister.Internal.Financial;
+using CashRegister.Internal.Financial.RegionCurrency;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+
+namespace CashRegister.Internal.Calculation.Tests
+{
+ [TestClass()]
+ public class TransactionTests
+ {
+ [TestMethod()]
+ public void Test_Input_Line_Contains_Too_Many_Items()
+ {
+ Transaction t = new Transaction("1.23,4.56,7.89");
+ t.GenerateChange(null, null, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.TooManyInputs.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Contains_Too_Few_Items()
+ {
+ Transaction t = new Transaction("1.23");
+ t.GenerateChange(null, null, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.TooFewInputs.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Is_Empty()
+ {
+ Transaction t = new Transaction("");
+ t.GenerateChange(null, null, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.TooFewInputs.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Is_Null()
+ {
+ Transaction t = new Transaction(null);
+ t.GenerateChange(null, null, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.EmptyInput.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Is_NaN()
+ {
+ Transaction t = new Transaction("NaN,NaN");
+ t.GenerateChange(null, null, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.NonNumeric.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Is_NonNumeric()
+ {
+ Transaction t = new Transaction("a,b");
+ t.GenerateChange(null, null, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.NonNumeric.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Contains_Negative_Cost()
+ {
+ Transaction t = new Transaction("-1.0,1");
+ t.GenerateChange(null, null, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.CostNegative.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Contains_Negative_Tendered()
+ {
+ Transaction t = new Transaction("1.11,-1.11");
+ t.GenerateChange(null, null, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.TenderedNegative.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Tendered_Value_Is_Lower_Than_Cost()
+ {
+ Transaction t = new Transaction("5,2");
+ t.GenerateChange(null, null, true);
+ Assert.AreEqual(true, t.Change.Contains(DataViolations.InsufficentTendered.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Upper_Bounds()
+ {
+ decimal d = decimal.MaxValue;
+ Transaction t = new Transaction(string.Format("100,{0}", d));
+ Random r = new Random(1);
+ IRegionCurrency test = new USDCurrency();
+ t.GenerateChange(test, r, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.ExeceededcalculableLimits.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Upper_Bound_Less_One()
+ {
+ int i = (int.MaxValue) - 1;
+ Transaction t = new Transaction(string.Format("100,{0}", i));
+ Random r = new Random(1);
+ IRegionCurrency test = new USDCurrency();
+ t.GenerateChange(test, r, true);
+ decimal calculatedChange = 0m;
+ foreach (string s in t.Change)
+ {
+ foreach (Currency c in test.Denominations)
+ {
+ if (s.Contains(c.Name) || s.Contains(c.PluralName))
+ {
+ string[] numbers = Regex.Split(s, @"\D+");
+ if (!string.IsNullOrEmpty(numbers[0]))
+ {
+ calculatedChange += (decimal)(c.Value * int.Parse(numbers[0]));
+ }
+ }
+ }
+ }
+ Assert.AreEqual(2147483546m, calculatedChange);
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Beyond_Upper_Bounds()
+ {
+ double d = double.MaxValue;
+ Transaction t = new Transaction(string.Format("10,{0}", d));
+ t.GenerateChange(null, null, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.NonNumeric.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Lower_Bounds()
+ {
+ decimal d = decimal.MinValue;
+ Transaction t = new Transaction(string.Format("{0},10", d));
+ t.GenerateChange(null, null, true);
+ Assert.IsTrue(t.Change.Contains(DataViolations.CostNegative.Value));
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Valid_Input()
+ {
+ Transaction t = new Transaction("3,5");
+ Assert.AreEqual(0, t.Change.Count);
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Valid_Input_Result_USD()
+ {
+ Transaction t = new Transaction("13.59,200");
+ IRegionCurrency test = new USDCurrency();
+ t.GenerateChange(test, null, true);
+ string expected = "1 hundred, 1 fifty, 1 twenty, 1 ten, 1 five, 1 one, 1 quarter, 1 dime, 1 nickel, 1 penny";
+ Assert.AreEqual(expected, t.ToString());
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Valid_Input_Result_EUR()
+ {
+ Transaction t = new Transaction("61.12,900");
+ IRegionCurrency test = new EURCurrency();
+ t.GenerateChange(test, null, true);
+ string expected = "1 five hundred, 1 two hundred, 1 hundred, 1 twenty, 1 ten, 1 five, 1 two, 1 one, 1 50c, 1 20c, 1 10c, 1 5c, 1 2c, 1 1c";
+ Assert.AreEqual(expected, t.ToString());
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Valid_Input_Result_CAD()
+ {
+ Transaction t = new Transaction("11.09,200");
+ IRegionCurrency test = new CADCurrency();
+ t.GenerateChange(test, null, true);
+ string expected = "1 hundred, 1 fifty, 1 twenty, 1 ten, 1 five, 1 toonie, 1 loonie, 1 half dollar, 1 quarter, 1 dime, 1 nickel, 1 penny";
+ Assert.AreEqual(expected, t.ToString());
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Valid_Input_Random_Change_Result()
+ {
+ Random r = new Random(99);
+ Transaction t = new Transaction("5.01, 20");
+ IRegionCurrency test = new USDCurrency();
+ t.GenerateChange(test, r, false);
+ string seed99 = t.ToString();
+ r = new Random(1);//reset random seed
+ t.GenerateChange(test, r, false);
+ Assert.AreNotEqual(seed99, t.ToString());
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Valid_Input_Random_Full_Result()
+ {
+ Random r = new Random(99);
+ Transaction t = new Transaction("5.01, 20");
+ IRegionCurrency test = new USDCurrency();
+ t.GenerateChange(test, r, true);
+ string seed99 = t.ToString();
+ r = new Random(1);//reset random seed
+ t.GenerateChange(test, r, false);
+ Assert.AreNotEqual(seed99, t.ToString());
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Valid_Input_Random_Comparisons()
+ {
+ Random r = new Random(1);
+ Random r2 = new Random(2000);
+ Transaction t = new Transaction("5.97, 100");
+ Transaction t2 = new Transaction("5.97, 100");
+ IRegionCurrency test = new USDCurrency();
+ t.GenerateChange(test, r, true);
+ t2.GenerateChange(test, r2, true);
+ Assert.AreNotEqual(t2.ToString(), t.ToString());
+ }
+
+ [TestMethod()]
+ public void Test_Input_Line_Valid_Input_Random_Change_Correctness()
+ {
+ Random r = new Random();
+ Transaction t = new Transaction("5.97, 10");
+ IRegionCurrency test = new USDCurrency();
+ t.GenerateChange(test, r, true);
+ decimal calculatedChange = 0m;
+ foreach (string s in t.Change)
+ {
+ foreach (Currency c in test.Denominations)
+ {
+ if (s.Contains(c.Name) || s.Contains(c.PluralName))
+ {
+ string[] numbers = Regex.Split(s, @"\D+");
+ if (!string.IsNullOrEmpty(numbers[0]))
+ {
+ calculatedChange += (decimal)(c.Value * int.Parse(numbers[0]));
+ }
+ }
+ }
+ }
+ Assert.AreEqual(4.03m, calculatedChange);
+ }
+ }
+}
\ No newline at end of file
diff --git a/CashRegisterTests/Properties/AssemblyInfo.cs b/CashRegisterTests/Properties/AssemblyInfo.cs
new file mode 100644
index 00000000..de0bc78f
--- /dev/null
+++ b/CashRegisterTests/Properties/AssemblyInfo.cs
@@ -0,0 +1,35 @@
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("CashRegisterTests")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("CashRegisterTests")]
+[assembly: AssemblyCopyright("Copyright © 2020")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components. If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("807b6f2b-2397-45b6-af56-bb5f5d80cf21")]
+
+// Version information for an assembly consists of the following four values:
+//
+// Major Version
+// Minor Version
+// Build Number
+// Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
\ No newline at end of file
diff --git a/CashRegisterTests/app.config b/CashRegisterTests/app.config
new file mode 100644
index 00000000..a0807c2c
--- /dev/null
+++ b/CashRegisterTests/app.config
@@ -0,0 +1,27 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/CashRegisterTests/packages.config b/CashRegisterTests/packages.config
new file mode 100644
index 00000000..f35aa412
--- /dev/null
+++ b/CashRegisterTests/packages.config
@@ -0,0 +1,7 @@
+
+
+
+
+
+
+
\ No newline at end of file