ex-oop-04-mosaic/Mosaic.Test/CompanyTests.cs

using System.Reflection;

namespace Mosaic.Test;

public sealed class CompanyTests : TestBase
{
    [Fact]
    public void Construction()
    {
        const string Name = "A";
        const decimal M2Price = 12.34M;
        const decimal HourlyWage = 56.67M;
        const int Margin = 6;
        Worker[] workers = CreateSampleWorkers(1);

        var company = new Company(Name, M2Price, HourlyWage, Margin, workers);

        company.Name.Should().Be(Name);
        CheckFields(company, M2Price, HourlyWage, Margin, workers)
            .Should().BeTrue("ctor has to set all fields correctly");
    }

    [Theory]
    [InlineData(PatternStyle.Simple, 1, 75D)]
    [InlineData(PatternStyle.Simple, 2, 55D)]
    [InlineData(PatternStyle.Simple, 3, 45D)]
    [InlineData(PatternStyle.Simple, 4, 20D)]
    [InlineData(PatternStyle.Complex, 1, 37.5D)]
    [InlineData(PatternStyle.Complex, 2, 27.5D)]
    [InlineData(PatternStyle.Complex, 3, 22.5D)]
    [InlineData(PatternStyle.Complex, 4, 10D)]
    public void CalcPiecesPerHour(PatternStyle style, int workerSet, double expectedPpH)
    {
        var company = new Company("B", 0, 0,
                                  0, CreateSampleWorkers(workerSet));

        CallCalcPiecesPerHour(company, style)
            .Should().Be(expectedPpH, "for this set of workers and pattern style");
    }

    [Theory]
    [MemberData(nameof(GetCostEstimateData))]
    public void GetCostEstimate(decimal m2Price, decimal hourlyWage, int profitMarginPercent,
                                Worker[] workers, TilePattern pattern, decimal expectedCost, string testCase)
    {
        var company = new Company("C", m2Price, hourlyWage, profitMarginPercent, workers);

        company.GetCostEstimate(pattern)
               .Should().Be(expectedCost, testCase);
    }

    public static TheoryData<decimal, decimal, int, Worker[], TilePattern, decimal, string> GetCostEstimateData()
    {
        return new TheoryData<decimal, decimal, int, Worker[], TilePattern, decimal, string>
        {
            {
                12.34M, 56.78M, 5, CreateSampleWorkers(1),
                CreatePattern(PatternStyle.Simple, 1), 20M, "simple case 1"
            },
            {
                12.34M, 87.65M, 5, CreateSampleWorkers(1),
                CreatePattern(PatternStyle.Simple, 1), 25M, "simple case 2"
            },
            {
                12.34M, 87.65M, 5, CreateSampleWorkers(1),
                CreatePattern(PatternStyle.Complex, 1), 39M, "simple case 3"
            },
            {
                12.34M, 87.65M, 5, CreateSampleWorkers(1),
                CreatePattern(PatternStyle.Simple, 2), 2351M, "bigger pattern, workers 1"
            },
            {
                12.34M, 87.65M, 9, CreateSampleWorkers(1),
                CreatePattern(PatternStyle.Simple, 2), 2368M, "bigger pattern, workers 1, higher profit margin"
            },
            {
                12.34M, 87.65M, 5, CreateSampleWorkers(2),
                CreatePattern(PatternStyle.Simple, 2), 2182M, "bigger pattern, workers 2"
            },
            {
                60M, 87.65M, 5, CreateSampleWorkers(2),
                CreatePattern(PatternStyle.Simple, 2), 2280M, "bigger pattern, workers 2, higher m2 price"
            },
            {
                12.34M, 87.65M, 5, CreateSampleWorkers(3),
                CreatePattern(PatternStyle.Simple, 2), 2557M, "bigger pattern, workers 3"
            },
            {
                12.34M, 35.45M, 5, CreateSampleWorkers(3),
                CreatePattern(PatternStyle.Simple, 2), 1328M, "bigger pattern, workers 3, lower hourly price"
            },
            {
                12.34M, 87.65M, 5, CreateSampleWorkers(4),
                CreatePattern(PatternStyle.Simple, 2), 2815M, "bigger pattern, workers 4"
            },
            {
                12.34M, 87.65M, 5, CreateSampleWorkers(4),
                CreatePattern(PatternStyle.Complex, 2), 5138M, "bigger pattern, workers 4, complex pattern"
            }
        };

        static TilePattern CreatePattern(PatternStyle style, int tileSet) => new(style, CreateSampleTiles(tileSet));
    }

    private static Worker[] CreateSampleWorkers(int set)
    {
        return set switch
               {
                   1 =>
                   [
                       new Worker("Franz Felser", WorkSpeed.Regular),
                       new Worker("Marlene Marmor", WorkSpeed.Fast),
                       new Worker("Ludwig Langsam", WorkSpeed.Slow)
                   ],
                   2 =>
                   [
                       new Worker("Franz Felser", WorkSpeed.Fast),
                       new Worker("Marlene Marmor", WorkSpeed.Regular)
                   ],
                   3 =>
                   [
                       new Worker("Franz Felser", WorkSpeed.Slow),
                       new Worker("Marlene Marmor", WorkSpeed.Regular)
                   ],
                   4 =>
                   [
                       new Worker("Franz Felser", WorkSpeed.Slow)
                   ],
                   _ => []
               };
    }

    #region test helper methods - ignore

    private static double CallCalcPiecesPerHour(Company instance, PatternStyle patternStyle)
    {
        var method = typeof(Company).GetMethod("CalcPiecesPerHour",
                                               BindingFlags.Instance | BindingFlags.NonPublic);
        if (method == null)
        {
            return -1D;
        }

        return (double) method.Invoke(instance, [patternStyle])!;
    }

    private static bool CheckFields(Company instance, decimal m2Price, decimal hourlyWage,
                                    int margin, Worker[] workers) =>
        CheckField(instance, m2Price, Prefix(nameof(m2Price)))
        && CheckField(instance, hourlyWage, Prefix(nameof(hourlyWage)))
        && CheckField(instance, margin, Prefix("profitMargin"))
        && CheckField(instance, workers, Prefix(nameof(workers)));

    #endregion
}