public void Load_ValidFileExists_LoadsDataCorrectly()
{
var actual = SimpleFileTariffLoader.Load(new FileInfo("./data/prices.json"));
var actualLookup = actual.ToLookup(t => t.Name);
actualLookup.Should().HaveCount(4);
actualLookup["2yr-fixed"].Should().HaveCount(1);
actualLookup["simpler-energy"].Should().HaveCount(1);
var better = actualLookup["better-energy"].Single();
better.Name.Should().Be("better-energy");
better.GasRate.Should().Be(0.0288M);
better.PowerRate.Should().Be(0.1367M);
better.StandingCharge.Should().Be(8.33M);
var greener = actualLookup["greener-energy"].Single();
greener.Name.Should().Be("greener-energy");
greener.GasRate.Should().BeNull();
greener.PowerRate.Should().Be(0.1544M);
greener.StandingCharge.Should().Be(8.33M);
}
public static void Main(string[] args)
{
// use only a little bit of DI to get everything started.
var provider = new ServiceCollection()
// register the tariff source, which is consumed by the commands
.AddSingleton(_ =>
{
// ensure the tarrif data is loaded before we use it.
ITariffSource source = new TariffSource();
source.ReloadAsync(() => SimpleFileTariffLoader.Load(new FileInfo(Path.GetFullPath("./prices.json")))).Wait();
return(source);
})
// Register our little 'command line' component
.AddCommands(config => config
// register the commands that we've implemented
.AddCommand <CostCommand>()
.AddCommand <UsageCommand>())
// this builds the MS container
.BuildServiceProvider();
// run the app
provider.ExecuteCommands(bootstrapper =>
bootstrapper.Execute(args, System.Console.Out, System.Console.Error));
}
public void Load_InvalidJsonFileExists_Throws()
{
new Action(() => SimpleFileTariffLoader.Load(new FileInfo("./invalid-prices.json")))
.Should().Throw <ArgumentException>();
}
public void Load_NoFileExists_Throws()
{
new Action(() => SimpleFileTariffLoader.Load(new FileInfo("./idontexist")))
.Should().Throw <ArgumentException>();
}
public void Load_EmptyFileExists_LoadsEmptyData()
{
var actual = SimpleFileTariffLoader.Load(new FileInfo("./data/empty-prices.json"));
actual.Should().BeEmpty();
}