public async Task ExchangeRate_SekToNokOn20180201_Returns0954686939716339()
{
var unitUnderTest = new ExchangeRateFetcher(new RestClient());
var rate = await unitUnderTest.FetchExchangeRate("SEK", "NOK", new DateTime(2018, 03, 01));
Assert.Equal(0.9546869397, rate.Rate, 10);
}
public async Task FetchExchangeRate_ValidRequest_Success()
{
var restClientMock = new Mock <IRestClient>();
var restResponseMock = new Mock <IRestResponse>();
restResponseMock.Setup(m => m.Content).Returns("{\"base\":\"EUR\",\"rates\":{\"2018-03-01\":{\"USD\":1}},\"end_at\":\"2018-03-01\",\"start_at\":\"2018-03-01\"}");
restClientMock.Setup(m => m.ExecuteGetTaskAsync(It.IsAny <IRestRequest>())).ReturnsAsync(restResponseMock.Object);
var unitUnderTest = new ExchangeRateFetcher(restClientMock.Object);
var rate = await unitUnderTest.FetchExchangeRate("EUR", "USD", DateTime.Now.AddDays(-1));
Assert.Equal(1, rate.Rate);
}
public async Task FetchExchangeRate_ExchangeRateBefore1999_ThrowsException()
{
var restClientMock = new Mock <IRestClient>();
var unitUnderTest = new ExchangeRateFetcher(restClientMock.Object);
await Assert.ThrowsAsync <ArgumentException>(() => unitUnderTest.FetchExchangeRate("EUR", "USD", new DateTime(1990, 2, 1)));
}
public async Task FetchExchangeRate_ExchangeRateInFuture_ThrowsException()
{
var restClientMock = new Mock <IRestClient>();
var unitUnderTest = new ExchangeRateFetcher(restClientMock.Object);
await Assert.ThrowsAsync <ArgumentException>(() => unitUnderTest.FetchExchangeRate("EUR", "USD", DateTime.Now.AddDays(1)));
}
public async Task FetchExchangeRate_TargetCurrencyIsNull_ThrowsException()
{
var restClientMock = new Mock <IRestClient>();
var unitUnderTest = new ExchangeRateFetcher(restClientMock.Object);
await Assert.ThrowsAsync <ArgumentNullException>(() => unitUnderTest.FetchExchangeRate("EUR", null, DateTime.Now));
}
public async Task FetchExchangeRate_InvalidTargetCurrency_ThrowsException(string targetCurrency)
{
var restClientMock = new Mock <IRestClient>();
var unitUnderTest = new ExchangeRateFetcher(restClientMock.Object);
await Assert.ThrowsAsync <ArgumentException>(() => unitUnderTest.FetchExchangeRate("EUR", targetCurrency, DateTime.Now));
}
public async Task ExchangeRate_UnknownCurrency_ThrowsException()
{
var unitUnderTest = new ExchangeRateFetcher(new RestClient());
await Assert.ThrowsAsync <Exception>(() => unitUnderTest.FetchExchangeRate("AAA", "NOK", new DateTime(2018, 03, 01)));
}