neiesc's solution to Space Age on the C# track

Instructions

Test suite

Solution

Note:

This exercise has changed since this solution was written.

Given an age in seconds, calculate how old someone would be on:

Earth: orbital period 365.25 Earth days, or 31557600 seconds
Mercury: orbital period 0.2408467 Earth years
Venus: orbital period 0.61519726 Earth years
Mars: orbital period 1.8808158 Earth years
Jupiter: orbital period 11.862615 Earth years
Saturn: orbital period 29.447498 Earth years
Uranus: orbital period 84.016846 Earth years
Neptune: orbital period 164.79132 Earth years

So if you were told someone were 1,000,000,000 seconds old, you should be able to say that they're 31.69 Earth-years old.

If you're wondering why Pluto didn't make the cut, go watch this youtube video.

Running the tests

To run the tests, run the command dotnet test from within the exercise directory.

Initially, only the first test will be enabled. This is to encourage you to solve the exercise one step at a time. Once you get the first test passing, remove the Skip property from the next test and work on getting that test passing. Once none of the tests are skipped and they are all passing, you can submit your solution using exercism submit SpaceAge.cs

Further information

For more detailed information about the C# track, including how to get help if you're having trouble, please visit the exercism.io C# language page.

Source

Partially inspired by Chapter 1 in Chris Pine's online Learn to Program tutorial. http://pine.fm/LearnToProgram/?Chapter=01

SpaceAgeTest.cs

// This file was auto-generated based on version 1.2.0 of the canonical data.

using Xunit;

public class SpaceAgeTest
{
    [Fact]
    public void Age_on_earth()
    {
        var sut = new SpaceAge(1000000000);
        Assert.Equal(31.69, sut.OnEarth(), precision: 2);
    }

    [Fact(Skip = "Remove to run test")]
    public void Age_on_mercury()
    {
        var sut = new SpaceAge(2134835688);
        Assert.Equal(280.88, sut.OnMercury(), precision: 2);
    }

    [Fact(Skip = "Remove to run test")]
    public void Age_on_venus()
    {
        var sut = new SpaceAge(189839836);
        Assert.Equal(9.78, sut.OnVenus(), precision: 2);
    }

    [Fact(Skip = "Remove to run test")]
    public void Age_on_mars()
    {
        var sut = new SpaceAge(2129871239);
        Assert.Equal(35.88, sut.OnMars(), precision: 2);
    }

    [Fact(Skip = "Remove to run test")]
    public void Age_on_jupiter()
    {
        var sut = new SpaceAge(901876382);
        Assert.Equal(2.41, sut.OnJupiter(), precision: 2);
    }

    [Fact(Skip = "Remove to run test")]
    public void Age_on_saturn()
    {
        var sut = new SpaceAge(2000000000);
        Assert.Equal(2.15, sut.OnSaturn(), precision: 2);
    }

    [Fact(Skip = "Remove to run test")]
    public void Age_on_uranus()
    {
        var sut = new SpaceAge(1210123456);
        Assert.Equal(0.46, sut.OnUranus(), precision: 2);
    }

    [Fact(Skip = "Remove to run test")]
    public void Age_on_neptune()
    {
        var sut = new SpaceAge(1821023456);
        Assert.Equal(0.35, sut.OnNeptune(), precision: 2);
    }
}

using System;
using System.Collections.Generic;

public class SpaceAge
{
    private int SecondsTotal { get; set; }
    private const double EarthOrbitalPeriodSecondsPerYear = 365.25 * 24 * 60 * 60;
    private Dictionary<string, double> PlanetsOrbitalPeriodSecondsPerYear = new Dictionary<string, double>() {
        {"Mercury", 0.2408467 * EarthOrbitalPeriodSecondsPerYear},
        {"Venus", 0.61519726 * EarthOrbitalPeriodSecondsPerYear},
        {"Mars", 1.8808158 * EarthOrbitalPeriodSecondsPerYear},
        {"Jupiter", 11.862615 * EarthOrbitalPeriodSecondsPerYear},
        {"Saturn", 29.447498 * EarthOrbitalPeriodSecondsPerYear},
        {"Uranus", 84.016846 * EarthOrbitalPeriodSecondsPerYear},
        {"Neptune", 164.79132 * EarthOrbitalPeriodSecondsPerYear},
    };

    public SpaceAge(int seconds)
    {
        SecondsTotal = seconds;
    }

    public double OnEarth()
    {
        return SecondsTotal / EarthOrbitalPeriodSecondsPerYear;
    }

    public double OnMercury()
    {
        return SecondsTotal / PlanetsOrbitalPeriodSecondsPerYear.GetValueOrDefault("Mercury");
    }

    public double OnVenus()
    {
        return SecondsTotal / PlanetsOrbitalPeriodSecondsPerYear.GetValueOrDefault("Venus");
    }

    public double OnMars()
    {
        return SecondsTotal / PlanetsOrbitalPeriodSecondsPerYear.GetValueOrDefault("Mars");
    }

    public double OnJupiter()
    {
        return SecondsTotal / PlanetsOrbitalPeriodSecondsPerYear.GetValueOrDefault("Jupiter");
    }

    public double OnSaturn()
    {
        return SecondsTotal / PlanetsOrbitalPeriodSecondsPerYear.GetValueOrDefault("Saturn");
    }

    public double OnUranus()
    {
        return SecondsTotal / PlanetsOrbitalPeriodSecondsPerYear.GetValueOrDefault("Uranus");
    }

    public double OnNeptune()
    {
        return SecondsTotal / PlanetsOrbitalPeriodSecondsPerYear.GetValueOrDefault("Neptune");
    }
}

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neiesc's solution

to Space Age in the C# Track