public void SetProperty_Exception_LambdaExpression_IsNotMemberAccess()
{
TestableNotifyPropertyChanged obj = new TestableNotifyPropertyChanged();
var e = Assert.Throws <ArgumentException>(() => obj.SetProperty_MySetProperty(10, () => 42));
Assert.Equal("The argument must be a member access lambda expression.\r\nParameter name: propertyExpression", e.Message);
Assert.Equal("propertyExpression", e.ParamName);
}
public void SetProperty_Exception_LambdaExpression_ExpressionIsNull()
{
TestableNotifyPropertyChanged obj = new TestableNotifyPropertyChanged();
Expression <Func <int> > propertyExpression = null;
var e = Assert.Throws <ArgumentNullException>(() => obj.SetProperty_MySetProperty(10, propertyExpression));
Assert.Equal("Value cannot be null.\r\nParameter name: propertyExpression", e.Message);
Assert.Equal("propertyExpression", e.ParamName);
}
public void SetProperty_SetsProperty_Struct()
{
TestableNotifyPropertyChanged obj = new TestableNotifyPropertyChanged()
{
MySetProperty = 5
};
obj.SetProperty_MySetProperty(10, "MySetProperty");
Assert.Equal(10, obj.MySetProperty);
}
public void SetProperty_ReturnsTrue_IfValueHasNotChanged()
{
TestableNotifyPropertyChanged obj = new TestableNotifyPropertyChanged()
{
MySetProperty = 10
};
bool changed = obj.SetProperty_MySetProperty(10, "MySetProperty");
Assert.Equal(false, changed);
}
public void SetProperty_FiresPropertyChangedEvent_LambdaExpression()
{
TestableNotifyPropertyChanged obj = new TestableNotifyPropertyChanged();
int propertyChangedCount = 0;
obj.PropertyChanged += (sender, e) =>
{
Assert.Equal(obj, sender);
Assert.Equal("MySetProperty", e.PropertyName);
propertyChangedCount++;
};
obj.SetProperty_MySetProperty(42, () => obj.MySetProperty);
Assert.Equal(1, propertyChangedCount);
}