public void TestExceptionInClickFilter()
{
// Create a substitute for all interface
var display = Substitute.For <IDisplay>();
var extBitmap = Substitute.For <IExtBitmap>();
var iLoad = Substitute.For <ILoad>();
var iSave = Substitute.For <ISave>();
// Get the instance of BusinessPresentation
BusinessPresentation bp = new BusinessPresentation(iLoad, iSave, extBitmap, display);
bp.FilteredBitmap = null;
// Get a fake picture from the form
PictureBox fakePictureBox = new PictureBox();
fakePictureBox.Image = Properties.Resources.firefox;
display.getImage(Arg.Any <PictureBox>()).Returns(fakePictureBox.Image);
bp.setExtBitmap(extBitmap);
// Throw exception
extBitmap.Laplacian3x3Filter(Arg.Any <Bitmap>()).ReturnsForAnyArgs(x => { throw new Exception(); });
try
{
// Apply the filter
bp.ClickFilter(fakePictureBox);
}
catch (Exception)
{
Assert.Fail("The picture was note filtered");
}
// The filtered picture must be null
Assert.IsNull(bp.FilteredBitmap);
}
public void TestClickFilterWithNullPictureBox()
{
// Create a substitute for all interface
var display = Substitute.For <IDisplay>();
var extBitmap = Substitute.For <IExtBitmap>();
var iLoad = Substitute.For <ILoad>();
var iSave = Substitute.For <ISave>();
// Get the instance of BusinessPresentation
BusinessPresentation bp = new BusinessPresentation(iLoad, iSave, extBitmap, display);
// Apply the filter with a null parameter
string response = bp.ClickFilter(null);
// Control the response
Assert.AreEqual(response, "parameter picture box is null");
}
public void TestClickFilter()
{
// Create a substitute for all interface
var display = Substitute.For <IDisplay>();
var extBitmap = Substitute.For <IExtBitmap>();
var iLoad = Substitute.For <ILoad>();
var iSave = Substitute.For <ISave>();
// Get the instance of BusinessPresentation
BusinessPresentation bp = new BusinessPresentation(iLoad, iSave, extBitmap, display);
// Make a fake picture box with a fake picture
PictureBox fakePictureBox = new PictureBox();
fakePictureBox.Image = Properties.Resources.firefox;
display.getImage(Arg.Any <PictureBox>()).Returns(fakePictureBox.Image);
Assert.AreEqual("filter successfull applyied", bp.ClickFilter(fakePictureBox));
}
// Test of the ClickFilter with a null picture in the box (which is not null)
public void TestClickFilterWithNullPicture()
{
// Create a substitute for all interface
var display = Substitute.For <IDisplay>();
var extBitmap = Substitute.For <IExtBitmap>();
var iLoad = Substitute.For <ILoad>();
var iSave = Substitute.For <ISave>();
// Get the instance of BusinessPresentation
BusinessPresentation bp = new BusinessPresentation(iLoad, iSave, extBitmap, display);
// Create a fake picture preview picture box, with a null picture
PictureBox fakePictureBox = new PictureBox();
fakePictureBox.Image = null;
display.getImage(Arg.Any <PictureBox>()).Returns(fakePictureBox.Image);
// Apply the filter
string response = bp.ClickFilter(fakePictureBox);
// Control the response
Assert.AreEqual(response, "picture is null");
}
