public async Task browse_async_calls_httpclient_with_defined_uri_if_cache_get_returns_null()
{
//Given
var expectedUri = new Uri("https://financialmodelingprep.com/api/v3/company/stock/list");
var handlerMock = new Mock <HttpMessageHandler>(MockBehavior.Strict);
handlerMock.Protected()
// Setup the PROTECTED method to mock
.Setup <Task <HttpResponseMessage> >(
"SendAsync",
ItExpr.IsAny <HttpRequestMessage>(),
ItExpr.IsAny <CancellationToken>()
)
// prepare the expected response of the mocked http call
.ReturnsAsync(new HttpResponseMessage()
{
StatusCode = HttpStatusCode.OK,
Content = new StringContent("{\n \"symbolsList\" : [ {\n \"symbol\" : \"SPY\",\n \"name\" : \"SPDR S&P 500\",\n \"price\" : 299.39\n }, {\n \"symbol\" : \"CMCSA\",\n \"name\" : \"Comcast Corporation Class A Common Stock\",\n \"price\" : 45.54\n } ]\n}")
})
.Verifiable();
// use real http client with mocked handler here
var httpClinet = new HttpClient(handlerMock.Object)
{
BaseAddress = new Uri("https://financialmodelingprep.com")
};
var memoryCacheMock = MockMemoryCacheService.RegisterMemoryCache(null);
var sut = new FinancialModelingPrepRepository(httpClinet,
memoryCacheMock.Object);
//When
var result = await sut.BrowseAsync();
//Then
result.Should().NotBeNull();
handlerMock.Protected().Verify(
"SendAsync",
Times.Exactly(1), // we expected a single external request
ItExpr.Is <HttpRequestMessage>(req =>
req.Method == HttpMethod.Get && // we expected a GET request
req.RequestUri == expectedUri // to this uri
),
ItExpr.IsAny <CancellationToken>()
);
MockMemoryCacheService.GetMethodWasCalledOnce(memoryCacheMock);
}
public async Task browse_async_checks_if_cache_contains_proper_data()
{
//Given
var cacheResult = new List <Company>();
var httpClientMock = new Mock <HttpClient>();
var memoryCacheMock =
MockMemoryCacheService.RegisterMemoryCache(cacheResult);
var sut = new FinancialModelingPrepRepository(httpClientMock.Object,
memoryCacheMock.Object);
//When
var result = await sut.BrowseAsync();
//Then
MockMemoryCacheService.GetMethodWasCalledOnce(memoryCacheMock);
result.Should().BeSameAs(cacheResult);
}
public async Task browse_async_saves_http_request_result_to_cache_if_it_returns_null()
{
//Given
var handlerMock = new Mock <HttpMessageHandler>(MockBehavior.Strict);
handlerMock.Protected()
// Setup the PROTECTED method to mock
.Setup <Task <HttpResponseMessage> >(
"SendAsync",
ItExpr.IsAny <HttpRequestMessage>(),
ItExpr.IsAny <CancellationToken>()
)
// prepare the expected response of the mocked http call
.ReturnsAsync(new HttpResponseMessage()
{
StatusCode = HttpStatusCode.OK,
Content = new StringContent("{\n \"symbolsList\" : [ {\n \"symbol\" : \"SPY\",\n \"name\" : \"SPDR S&P 500\",\n \"price\" : 299.39\n }, {\n \"symbol\" : \"CMCSA\",\n \"name\" : \"Comcast Corporation Class A Common Stock\",\n \"price\" : 45.54\n } ]\n}")
})
.Verifiable();
// use real http client with mocked handler here
var httpClinet = new HttpClient(handlerMock.Object)
{
BaseAddress = new Uri("https://financialmodelingprep.com")
};
var memoryCacheMock = MockMemoryCacheService.RegisterMemoryCache(null);
var sut = new FinancialModelingPrepRepository(httpClinet,
memoryCacheMock.Object);
//When
await sut.BrowseAsync();
//Then
MockMemoryCacheService.SetMethodWasCalledOnce(memoryCacheMock);
}
public async Task browse_async_does_not_call_httpclient_if_cache_get_method_returns_not_null()
{
//Given
var cacheResult = new List <Company>();
var handlerMock = new Mock <HttpMessageHandler>(MockBehavior.Strict);
var httpClinet = new HttpClient(handlerMock.Object);
var memoryCacheMock = MockMemoryCacheService.RegisterMemoryCache(cacheResult);
var sut = new FinancialModelingPrepRepository(httpClinet,
memoryCacheMock.Object);
//When
var result = await sut.BrowseAsync();
//Then
result.Should().BeSameAs(cacheResult);
handlerMock.Protected().Verify(
"SendAsync",
Times.Exactly(0), // we expect that http client has not been used
ItExpr.IsAny <HttpRequestMessage>(),
ItExpr.IsAny <CancellationToken>());
}