async void ExecFromRequires_NotNullInput()
{
var transformerMock = new Mock <ILazy <ITransformationManager> >();
var handler = new TenInputOutputHandler(transformerMock.Object);
var exception =
await Assert.ThrowsAsync <ArgumentNullException>(() =>
handler.ExecFromAsync <double?>(null));
Assert.Equal("from", exception.ParamName);
}
void RequiresITransformationManager_ToBe_Instantiated()
{
var transformerMock = new Mock <ILazy <ITransformationManager> >();
var handler = new TenInputOutputHandler(transformerMock.Object);
var exception =
Assert.Throws <ArgumentNullException>(() => new TenInputOutputHandler(null));
Assert.NotNull(handler);
Assert.Equal("transformer", exception.ParamName);
}
async void ExecFrom_WhenInputIsCorrectlyTransformed_ExecActionIsTriggered()
{
var transformerMock = new Mock <ILazy <ITransformationManager> >();
transformerMock.Setup(s => s.Value.Transform <int, string>(It.IsAny <int>()))
.Returns("TenLetters");
var handler = new TenInputOutputHandler(transformerMock.Object);
int result = await handler.ExecFromAsync(0);
Assert.Equal(10, result);
}
async void ExecFrom_DoesNotExecute_WhenInputIsAlreadyOfThe_ExpectedType()
{
var transformerMock = new Mock <ILazy <ITransformationManager> >();
var handler = new TenInputOutputHandler(transformerMock.Object);
var exception =
await Assert.ThrowsAsync <BusinessLayerException>(() =>
handler.ExecFromAsync <string>("notnull"));
Assert.Equal(
"The input object is already of the expected type. You should use Exec() instead of Exec<>()",
exception.Message);
}
async void ExecFrom_RaisesException_WhenThenTransformer_ReturnsNull()
{
var transformerMock = new Mock <ILazy <ITransformationManager> >();
transformerMock.Setup(s => s.Value.Transform <int, string>(It.IsAny <int>()))
.Returns((string)null);
var handler = new TenInputOutputHandler(transformerMock.Object);
var exception =
await Assert.ThrowsAsync <BusinessLayerException>(() =>
handler.ExecFromAsync(1));
Assert.Equal("The input type cannot be transformed to the expected type properly",
exception.Message);
}
