async void ExecFromRequires_NotNullInput()
{
var transformerMock = new Mock <ILazy <ITransformationManager> >();
var handler = new IntegerInputOnlyHandler(transformerMock.Object);
var exception =
await Assert.ThrowsAsync <ArgumentNullException>(() =>
handler.ExecFromAsync <double?>(null));
Assert.Equal("from", exception.ParamName);
}
async void ExecFrom_DoesNotExecute_WhenInputIsAlreadyOfThe_ExpectedType()
{
var transformerMock = new Mock <ILazy <ITransformationManager> >();
var handler = new IntegerInputOnlyHandler(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 IntegerInputOnlyHandler(transformerMock.Object);
var exception =
await Assert.ThrowsAsync <BusinessLayerException>(() => handler.ExecFromAsync(0));
Assert.Equal("The input type cannot be transformed to the expected type properly",
exception.Message);
}