public void SkipTakeTest()
{
// Arrange
string firstNameStart = TestUser.FirstName.Substring(0, 1);
int skip = 1;
int take = 2;
IEnumerable <User> expected;
IEnumerable <User> actual;
// Act
using (var context = new DirectoryContextMock()) {
var queryBase = context.Users.Where(u => u.FirstName.StartsWith(firstNameStart));
int total = queryBase.Count();
if (total <= skip + take)
{
Assert.Inconclusive("Not enough elements for this test.");
}
expected = queryBase.ToArray().Skip(skip).Take(take);
actual = queryBase.Skip(skip).Take(take).ToArray();
}
// Assert
SequenceAssert.AreEqual(expected.Select(u => u.LastName), actual.Select(u => u.LastName));
}
public void WithConvertBackFunction_UsingConverterParameter()
{
// with a wrong target type (use default error strategy)
SequenceAssert.AreEqual(
new object[] { null },
MultiValueConverter.Create <string, int, bool>(convertBackFunction: e => null).ConvertBack(1, new[] { typeof(bool) }, true, null));
// without a target type
Assert.IsNull(MultiValueConverter.Create <string, int, bool>(convertBackFunction: e => null).ConvertBack(1, new Type[] { }, true, null));
Assert.IsNull(
MultiValueConverter.Create <string, int, bool>(convertBackFunction: e => null)
.ConvertBack(1, new[] { typeof(string), null }, true, null));
SequenceAssert.AreEqual(
new[] { "a", "b" },
MultiValueConverter.Create <string, int, bool>(convertBackFunction: e => new[] { "a", "b" }).ConvertBack(1, null, true, null));
// with an unexpected parameter (use default error strategy)
SequenceAssert.AreEqual(
new object[] { null },
MultiValueConverter.Create <string, int, bool>(convertBackFunction: e => null).ConvertBack(1, new[] { typeof(string) }, "p", null));
SequenceAssert.AreEqual(
new object[] { null },
MultiValueConverter.Create <string, int, bool>(convertBackFunction: e => null).ConvertBack(1, new[] { typeof(string) }, null, null));
// with an input value of an unexpected type (use default error strategy)
SequenceAssert.AreEqual(
new object[] { null },
MultiValueConverter.Create <string, int, bool>(convertBackFunction: e => null).ConvertBack(true, new[] { typeof(string) }, true, null));
SequenceAssert.AreEqual(
new object[] { null },
MultiValueConverter.Create <string, int, bool>(convertBackFunction: e => null).ConvertBack(null, new[] { typeof(string) }, true, null));
// with a valid input value
SequenceAssert.AreEqual(
new[] { "a", "b" },
MultiValueConverter.Create <string, int, bool>(convertBackFunction: e => new[] { "a", "b" })
.ConvertBack(1, new[] { typeof(string), typeof(string) }, true, null));
SequenceAssert.AreEqual(
new[] { "1", "1" },
MultiValueConverter.Create <string, int, bool>(
convertBackFunction: e =>
{
Assert.AreEqual(1, e.Value);
Assert.AreEqual(true, e.Parameter);
Assert.IsNull(e.Culture);
return(new[] { e.Value.ToString(), e.Value.ToString() });
}).ConvertBack(1, new[] { typeof(string), typeof(string) }, true, null));
SequenceAssert.AreEqual(
new[] { "1", "1" },
MultiValueConverter.Create <string, int, bool>(
convertBackFunction: e =>
{
Assert.AreEqual(1, e.Value);
Assert.AreEqual(false, e.Parameter);
Assert.AreEqual(new CultureInfo("en-GB"), e.Culture);
return(new[] { e.Value.ToString(), e.Value.ToString() });
}).ConvertBack(1, new[] { typeof(string), typeof(string) }, false, new CultureInfo("en-GB")));
}
public void WithConvertFunction_UsingConverterParameter()
{
// with a wrong target type (use default error strategy)
Assert.IsNull(MultiValueConverter.Create <int, string?, bool>(e => null).Convert(new object[] { 1, 2 }, typeof(bool), true, null));
// without a target type
Assert.AreEqual("a", MultiValueConverter.Create <int, string, bool>(e => "a").Convert(new object[] { 1, 2 }, null, true, null));
// with an unexpected parameter (use default error strategy)
Assert.IsNull(MultiValueConverter.Create <int, string?, bool>(e => null).Convert(new object[] { 1, 2 }, typeof(string), "p", null));
Assert.IsNull(MultiValueConverter.Create <int, string?, bool>(e => null).Convert(new object[] { 1, 2 }, typeof(string), null, null));
// with an input value of an unexpected type (use default error strategy)
Assert.IsNull(
MultiValueConverter.Create <int, string?, bool>(e => null).Convert(new object?[] { true, null }, typeof(string), true, null));
Assert.IsNull(
MultiValueConverter.Create <int, string?, bool>(e => null).Convert(new object?[] { null, true }, typeof(string), true, null));
Assert.IsNull(
MultiValueConverter.Create <int, string?, bool>(e => null).Convert(ArrayUtils.GetEmpty <object>(), typeof(string), true, null));
Assert.IsNull(MultiValueConverter.Create <int, string?, bool>(e => null).Convert(null, typeof(string), true, null));
// with a valid input value
Assert.AreEqual("a", MultiValueConverter.Create <int, string, bool>(e => "a").Convert(new object[] { 1, 2 }, typeof(string), true, null));
Assert.AreEqual(
"3",
MultiValueConverter.Create <int, string, bool>(
e =>
{
SequenceAssert.AreEqual(new[] { 1, 2 }, e.Values);
Assert.AreEqual(true, e.Parameter);
Assert.IsNull(e.Culture);
return(e.Values.Sum().ToString());
})
.Convert(new object[] { 1, 2 }, typeof(string), true, null));
Assert.AreEqual(
"3",
MultiValueConverter.Create <int, string, bool>(
e =>
{
SequenceAssert.AreEqual(new[] { 1, 2 }, e.Values);
Assert.AreEqual(false, e.Parameter);
Assert.AreEqual(new CultureInfo("en-GB"), e.Culture);
return(e.Values.Sum().ToString());
})
.Convert(new object[] { 1, 2 }, typeof(string), false, new CultureInfo("en-GB")));
}
public void NoFunctions_UsingConverterParameter()
{
// invalid error strategy
ExceptionAssert.Throws <ArgumentOutOfRangeException>(
() => MultiValueConverter.Create <int, string, bool>(errorStrategy: (ConverterErrorStrategy)int.MaxValue),
"errorStrategy");
// with ConverterErrorStrategy.ReturnDefaultValue (default)
Assert.AreEqual(null, MultiValueConverter.Create <int, string, bool>().Convert(null, null, null, null));
Assert.AreEqual(null, MultiValueConverter.Create <int, string, bool>().Convert(ArrayUtils.GetEmpty <object>(), null, null, null));
Assert.AreEqual(null, MultiValueConverter.Create <int, string, bool>().Convert(new object[] { 1, 2 }, null, null, null));
Assert.AreEqual(0, MultiValueConverter.Create <int, int, bool>().Convert(null, null, null, null));
Assert.AreEqual(0, MultiValueConverter.Create <int, int, bool>().Convert(ArrayUtils.GetEmpty <object>(), null, null, null));
Assert.AreEqual(0, MultiValueConverter.Create <int, int, bool>().Convert(new object[] { 1, 2 }, null, null, null));
Assert.AreEqual(false, MultiValueConverter.Create <int, bool, bool>().Convert(null, null, null, null));
Assert.AreEqual(false, MultiValueConverter.Create <int, bool, bool>().Convert(ArrayUtils.GetEmpty <object>(), null, null, null));
Assert.AreEqual(false, MultiValueConverter.Create <int, bool, bool>().Convert(new object[] { 1, 2 }, null, null, null));
Assert.IsNull(MultiValueConverter.Create <string, int, bool>().ConvertBack(1, null, null, null));
SequenceAssert.AreEqual(
ArrayUtils.GetEmpty <object>(),
MultiValueConverter.Create <string, int, bool>().ConvertBack(1, ArrayUtils.GetEmpty <Type>(), null, null));
SequenceAssert.AreEqual(
new object[2],
MultiValueConverter.Create <string, int, bool>().ConvertBack(1, new[] { typeof(int), typeof(string) }, null, null));
Assert.IsNull(MultiValueConverter.Create <int, int, bool>().ConvertBack(1, null, null, null));
SequenceAssert.AreEqual(
ArrayUtils.GetEmpty <object>(),
MultiValueConverter.Create <int, int, bool>().ConvertBack(1, ArrayUtils.GetEmpty <Type>(), null, null));
SequenceAssert.AreEqual(
new object[] { 0, 0 },
MultiValueConverter.Create <int, int, bool>().ConvertBack(1, new[] { typeof(int), typeof(string) }, null, null));
Assert.IsNull(MultiValueConverter.Create <bool, int, bool>().ConvertBack(1, null, null, null));
SequenceAssert.AreEqual(
ArrayUtils.GetEmpty <object>(),
MultiValueConverter.Create <bool, int, bool>().ConvertBack(1, ArrayUtils.GetEmpty <Type>(), null, null));
SequenceAssert.AreEqual(
new object[] { false, false },
MultiValueConverter.Create <bool, int, bool>().ConvertBack(1, new[] { typeof(int), typeof(string) }, null, null));
// with ConverterErrorStrategy.UseFallbackOrDefaultValue
Assert.AreEqual(
DependencyProperty.UnsetValue,
MultiValueConverter.Create <int, string, bool>(errorStrategy: ConverterErrorStrategy.UseFallbackOrDefaultValue)
.Convert(null, null, null, null));
Assert.AreEqual(
DependencyProperty.UnsetValue,
MultiValueConverter.Create <int, string, bool>(errorStrategy: ConverterErrorStrategy.UseFallbackOrDefaultValue)
.Convert(ArrayUtils.GetEmpty <object>(), null, null, null));
Assert.AreEqual(
DependencyProperty.UnsetValue,
MultiValueConverter.Create <int, string, bool>(errorStrategy: ConverterErrorStrategy.UseFallbackOrDefaultValue)
.Convert(new object[] { 1, 2 }, null, null, null));
Assert.IsNull(
MultiValueConverter.Create <string, int, bool>(errorStrategy: ConverterErrorStrategy.UseFallbackOrDefaultValue)
.ConvertBack(1, null, null, null));
SequenceAssert.AreEqual(
ArrayUtils.GetEmpty <object>(),
MultiValueConverter.Create <string, int, bool>(errorStrategy: ConverterErrorStrategy.UseFallbackOrDefaultValue)
.ConvertBack(1, ArrayUtils.GetEmpty <Type>(), null, null));
SequenceAssert.AreEqual(
new[] { DependencyProperty.UnsetValue, DependencyProperty.UnsetValue },
MultiValueConverter.Create <string, int, bool>(errorStrategy: ConverterErrorStrategy.UseFallbackOrDefaultValue)
.ConvertBack(1, new[] { typeof(int), typeof(string) }, null, null));
// with ConverterErrorStrategy.DoNothing
Assert.AreEqual(
Binding.DoNothing,
MultiValueConverter.Create <int, string, bool>(errorStrategy: ConverterErrorStrategy.DoNothing).Convert(null, null, null, null));
Assert.AreEqual(
Binding.DoNothing,
MultiValueConverter.Create <int, string, bool>(errorStrategy: ConverterErrorStrategy.DoNothing)
.Convert(ArrayUtils.GetEmpty <object>(), null, null, null));
Assert.AreEqual(
Binding.DoNothing,
MultiValueConverter.Create <int, string, bool>(errorStrategy: ConverterErrorStrategy.DoNothing)
.Convert(new object[] { 1, 2 }, null, null, null));
Assert.IsNull(
MultiValueConverter.Create <string, int, bool>(errorStrategy: ConverterErrorStrategy.DoNothing).ConvertBack(1, null, null, null));
SequenceAssert.AreEqual(
ArrayUtils.GetEmpty <object>(),
MultiValueConverter.Create <string, int, bool>(errorStrategy: ConverterErrorStrategy.DoNothing)
.ConvertBack(1, ArrayUtils.GetEmpty <Type>(), null, null));
SequenceAssert.AreEqual(
new[] { Binding.DoNothing, Binding.DoNothing },
MultiValueConverter.Create <string, int, bool>(errorStrategy: ConverterErrorStrategy.DoNothing)
.ConvertBack(1, new[] { typeof(int), typeof(string) }, null, null));
}
