public void ContextualCommandViewModel_Icon()
{
// Arrange
var context = new object();
var command = new RelayCommand(() => { });
var testSubject = new ContextualCommandViewModel(context, command);
using (var tracker = new PropertyChangedTracker(testSubject))
{
// Case 1: null
// Act + Assert
testSubject.Icon.Should().BeNull("Expected icon to return null when not set");
// Case 2: static
var staticIcon = new IconViewModel(null);
testSubject.Icon = staticIcon;
// Act + Assert
testSubject.Icon.Should().Be(staticIcon, "Unexpected static icon");
tracker.AssertPropertyChangedRaised(nameof(testSubject.Icon), 1);
// Case 3: dynamic
var dynamicIcon = new IconViewModel(null);
var funcInvoked = false;
Func <object, IconViewModel> func = x =>
{
funcInvoked = true;
return(dynamicIcon);
};
testSubject.SetDynamicIcon(func);
// Act + Assert
testSubject.Icon.Should().Be(dynamicIcon, "Unexpected dynamic icon");
funcInvoked.Should().BeTrue("Dynamic icon function was not invoked");
tracker.AssertPropertyChangedRaised(nameof(testSubject.Icon), 2);
}
// Case 4: dynamic - null exception
Exceptions.Expect <ArgumentNullException>(() => testSubject.SetDynamicIcon(null));
}
public void ContextualCommandViewModel_DisplayText()
{
// Arrange
var context = new object();
var command = new RelayCommand(() => { });
var testSubject = new ContextualCommandViewModel(context, command);
using (var tracker = new PropertyChangedTracker(testSubject))
{
// Case 1: null
// Act + Assert
testSubject.DisplayText.Should().BeNull("Expected display text to return null when not set");
// Case 2: static
testSubject.DisplayText = "foobar9000";
// Act + Assert
testSubject.DisplayText.Should().Be("foobar9000", "Unexpected static display text");
tracker.AssertPropertyChangedRaised(nameof(testSubject.DisplayText), 1);
// Case 3: dynamic
var funcInvoked = false;
Func <object, string> func = x =>
{
funcInvoked = true;
return("1234");
};
testSubject.SetDynamicDisplayText(func);
// Act + Assert
testSubject.DisplayText.Should().Be("1234", "Unexpected dynamic display text");
funcInvoked.Should().BeTrue("Dynamic display text function was not invoked");
tracker.AssertPropertyChangedRaised(nameof(testSubject.DisplayText), 2);
}
// Case 4: dynamic - null exception
Exceptions.Expect <ArgumentNullException>(() => testSubject.SetDynamicDisplayText(null));
}
public void ContextualCommandViewModel_DisplayText()
{
// Setup
var context = new object();
var command = new RelayCommand(() => { });
var testSubject = new ContextualCommandViewModel(context, command);
using (var tracker = new PropertyChangedTracker(testSubject))
{
// Case 1: null
// Act + Verify
Assert.IsNull(testSubject.DisplayText, "Expected display text to return null when not set");
// Case 2: static
testSubject.DisplayText = "foobar9000";
// Act + Verify
Assert.AreEqual("foobar9000", testSubject.DisplayText, "Unexpected static display text");
tracker.AssertPropertyChangedRaised(nameof(testSubject.DisplayText), 1);
// Case 3: dynamic
var funcInvoked = false;
Func<object, string> func = x =>
{
funcInvoked = true;
return "1234";
};
testSubject.SetDynamicDisplayText(func);
// Act + Verify
Assert.AreEqual("1234", testSubject.DisplayText, "Unexpected dynamic display text");
Assert.IsTrue(funcInvoked, "Dynamic display text function was not invoked");
tracker.AssertPropertyChangedRaised(nameof(testSubject.DisplayText), 2);
}
// Case 4: dynamic - null exception
Exceptions.Expect<ArgumentNullException>(() => testSubject.SetDynamicDisplayText(null));
}
public void ContextualCommandViewModel_Icon()
{
// Setup
var context = new object();
var command = new RelayCommand(() => { });
var testSubject = new ContextualCommandViewModel(context, command);
using (var tracker = new PropertyChangedTracker(testSubject))
{
// Case 1: null
// Act + Verify
Assert.IsNull(testSubject.Icon, "Expected icon to return null when not set");
// Case 2: static
var staticIcon = new IconViewModel(null);
testSubject.Icon = staticIcon;
// Act + Verify
Assert.AreSame(staticIcon, testSubject.Icon, "Unexpected static icon");
tracker.AssertPropertyChangedRaised(nameof(testSubject.Icon), 1);
// Case 3: dynamic
var dynamicIcon = new IconViewModel(null);
var funcInvoked = false;
Func<object, IconViewModel> func = x =>
{
funcInvoked = true;
return dynamicIcon;
};
testSubject.SetDynamicIcon(func);
// Act + Verify
Assert.AreSame(dynamicIcon, testSubject.Icon, "Unexpected dynamic icon");
Assert.IsTrue(funcInvoked, "Dynamic icon function was not invoked");
tracker.AssertPropertyChangedRaised(nameof(testSubject.Icon), 2);
}
// Case 4: dynamic - null exception
Exceptions.Expect<ArgumentNullException>(() => testSubject.SetDynamicIcon(null));
}