public void Throw_ArgumentNullException_When_Input_Is_Null()
{
//Arrange
var apiCallerMock = Mock.Of <ITwitterApiCaller>();
var jsonDerserializerMock = Mock.Of <IJsonDeserializer>();
var sut = new TwitterApiCallService(apiCallerMock, jsonDerserializerMock);
//Act && Assert
Assert.ThrowsException <ArgumentNullException>(() => sut.GetTweetsByUserId(null));
}
public void Invoke_GetTwitterData_From_ApiCaller_When_Input_Is_Valid()
{
//Arrange
var apiCallerMock = new Mock <ITwitterApiCaller>();
var jsonDerserializerMock = Mock.Of <IJsonDeserializer>();
var sut = new TwitterApiCallService(apiCallerMock.Object, jsonDerserializerMock);
//Act
var result = sut.GetTweetsByUserId("123");
//Assert
apiCallerMock.Verify(v => v.GetTwitterData(It.IsAny <string>()), Times.Once);
}
public void Return_Instance_Of_TypeFolloweeFromApiDtoArray_When_Input_Is_Valid()
{
//Arrange
var apiCallerMock = new Mock <ITwitterApiCaller>();
var jsonDerserializerMock = new Mock <IJsonDeserializer>();
var sut = new TwitterApiCallService(apiCallerMock.Object, jsonDerserializerMock.Object);
jsonDerserializerMock.Setup(s => s.Deserialize <TweetFromApiDto[]>(It.IsAny <string>())).Returns(new TweetFromApiDto[0]);
//Act
var result = sut.GetTweetsByUserId("123");
//Assert
Assert.IsInstanceOfType(result, typeof(IEnumerable <TweetFromApiDto>));
}
public void Invoke_Deserialize_From_jsonDeserializer_When_Input_Is_Valid()
{
//Arrange
var apiCallerMock = new Mock <ITwitterApiCaller>();
var jsonDerserializerMock = new Mock <IJsonDeserializer>();
var sut = new TwitterApiCallService(apiCallerMock.Object, jsonDerserializerMock.Object);
jsonDerserializerMock.Setup(s => s.Deserialize <TweetFromApiDto[]>(It.IsAny <string>())).Returns(new TweetFromApiDto[0]);
//Act
var result = sut.GetTweetsByUserId("123");
//Assert
jsonDerserializerMock.Verify(v => v.Deserialize <TweetFromApiDto[]>(It.IsAny <string>()), Times.Once);
}
