public void Cast()
{
using var expr = ActiveExpression.Create(p1 => (double)p1, 3);
Assert.IsNull(expr.Fault);
Assert.AreEqual(3D, expr.Value);
Assert.IsInstanceOfType(expr.Value, typeof(double));
}
public void DateTimeStringConversion()
{
var now = DateTime.UtcNow;
using (var expr = ActiveExpression.Create(p1 => p1, now))
Assert.AreEqual($"{{C}} /* new System.DateTime({now.Ticks}, System.DateTimeKind.Utc) */", expr.ToString());
}
public void FaultedStringConversion()
{
TestPerson noOne = null;
using (var expr = ActiveExpression.Create(p1 => p1.Name, noOne))
Assert.AreEqual($"{{C}} /* null */.Name /* [{typeof(NullReferenceException).Name}: {new NullReferenceException().Message}] */", expr.ToString());
}
public void EvaluationFault()
{
TestPerson noOne = null;
using (var expr = ActiveExpression.Create(() => - noOne))
Assert.IsNotNull(expr.Fault);
}
public void CollectionChanges()
{
var numbers = new RangeObservableCollection <int>(Enumerable.Range(1, 10));
var values = new BlockingCollection <int>();
using (var expr = ActiveExpression.Create(p1 => p1[5], numbers))
{
var disconnect = expr.OnPropertyChanged(ae => ae.Value, value => values.Add(value));
values.Add(expr.Value);
numbers.Add(11);
numbers.Insert(0, 0);
numbers.Remove(11);
numbers.Remove(0);
numbers[4] = 50;
numbers[4] = 5;
numbers[5] = 60;
numbers[5] = 6;
numbers[6] = 70;
numbers[6] = 7;
numbers.Move(0, 1);
numbers.Move(0, 1);
numbers.MoveRange(0, 5, 5);
numbers.MoveRange(0, 5, 5);
numbers.MoveRange(5, 0, 5);
numbers.MoveRange(5, 0, 5);
numbers.Reset(numbers.Select(i => i * 10).ToImmutableArray());
disconnect();
}
Assert.IsTrue(new int[] { 6, 5, 6, 60, 6, 1, 6, 1, 6, 60 }.SequenceEqual(values));
}
public void DictionaryChanges()
{
var perfectNumbers = new ObservableDictionary <int, int>(Enumerable.Range(1, 10).ToDictionary(i => i, i => i * i));
var values = new BlockingCollection <int>();
using (var expr = ActiveExpression.Create(p1 => p1[5], perfectNumbers))
{
var disconnect = expr.OnPropertyChanged(ae => ae.Value, value =>
{
values.Add(value);
});
values.Add(expr.Value);
perfectNumbers.Add(11, 11 * 11);
perfectNumbers.AddRange(Enumerable.Range(12, 3).ToDictionary(i => i, i => i * i));
perfectNumbers.Remove(11);
perfectNumbers.RemoveRange(Enumerable.Range(12, 3));
perfectNumbers.Remove(5);
perfectNumbers.Add(5, 30);
perfectNumbers[5] = 25;
perfectNumbers.RemoveRange(Enumerable.Range(4, 3));
perfectNumbers.AddRange(Enumerable.Range(4, 3).ToDictionary(i => i, i => i * i));
perfectNumbers.Clear();
disconnect();
}
Assert.IsTrue(new int[] { 25, 0, 30, 25, 0, 25, 0 }.SequenceEqual(values));
}
public void TimeSpanStringConversion()
{
var threeMinutes = TimeSpan.FromMinutes(3);
using (var expr = ActiveExpression.Create(p1 => p1, threeMinutes))
Assert.AreEqual($"{{C}} /* new System.TimeSpan({threeMinutes.Ticks}) */", expr.ToString());
}
public void CharStringConversion()
{
var person = new TestPerson("\\");
using (var expr = ActiveExpression.Create(p1 => p1.Name[0], person))
{
Assert.AreEqual("{C} /* {\\} */.Name /* \"\\\\\" */[{C} /* 0 */] /* '\\\\' */", expr.ToString());
person.Name = "\0";
Assert.AreEqual("{C} /* {\0} */.Name /* \"\\0\" */[{C} /* 0 */] /* '\\0' */", expr.ToString());
person.Name = "\a";
Assert.AreEqual("{C} /* {\a} */.Name /* \"\\a\" */[{C} /* 0 */] /* '\\a' */", expr.ToString());
person.Name = "\b";
Assert.AreEqual("{C} /* {\b} */.Name /* \"\\b\" */[{C} /* 0 */] /* '\\b' */", expr.ToString());
person.Name = "\f";
Assert.AreEqual("{C} /* {\f} */.Name /* \"\\f\" */[{C} /* 0 */] /* '\\f' */", expr.ToString());
person.Name = "\n";
Assert.AreEqual("{C} /* {\n} */.Name /* \"\\n\" */[{C} /* 0 */] /* '\\n' */", expr.ToString());
person.Name = "\r";
Assert.AreEqual("{C} /* {\r} */.Name /* \"\\r\" */[{C} /* 0 */] /* '\\r' */", expr.ToString());
person.Name = "\t";
Assert.AreEqual("{C} /* {\t} */.Name /* \"\\t\" */[{C} /* 0 */] /* '\\t' */", expr.ToString());
person.Name = "\v";
Assert.AreEqual("{C} /* {\v} */.Name /* \"\\v\" */[{C} /* 0 */] /* '\\v' */", expr.ToString());
person.Name = "x";
Assert.AreEqual("{C} /* {x} */.Name /* \"x\" */[{C} /* 0 */] /* 'x' */", expr.ToString());
}
}
public void GuidStringConversion()
{
var guid = Guid.NewGuid();
using (var expr = ActiveExpression.Create(p1 => p1, guid))
Assert.AreEqual($"{{C}} /* new System.Guid(\"{guid}\") */", expr.ToString());
}
public async Task ValueAsyncDisposalAsync()
{
var people = new ObservableCollection <AsyncDisposableTestPerson>
{
AsyncDisposableTestPerson.CreateJohn(),
AsyncDisposableTestPerson.CreateEmily()
};
var disposedTcs = new TaskCompletionSource <object?>();
AsyncDisposableTestPerson?newPerson;
using (var expr = ActiveExpression.Create(p => p[0] + p[1], people))
{
newPerson = expr.Value;
Assert.IsFalse(newPerson !.IsDisposed);
newPerson.Disposed += (sender, e) => disposedTcs.SetResult(null);
people[0] = AsyncDisposableTestPerson.CreateJohn();
await Task.WhenAny(disposedTcs.Task, Task.Delay(TimeSpan.FromSeconds(1)));
Assert.IsTrue(newPerson.IsDisposed);
newPerson = expr.Value;
Assert.IsFalse(newPerson !.IsDisposed);
disposedTcs = new TaskCompletionSource <object?>();
newPerson.Disposed += (sender, e) => disposedTcs.SetResult(null);
}
await Task.WhenAny(disposedTcs.Task, Task.Delay(TimeSpan.FromSeconds(1)));
Assert.IsTrue(newPerson.IsDisposed);
}
public void StringConversion()
{
var emily = TestPerson.CreateEmily();
emily.Name = "X";
using var expr = ActiveExpression.Create(p1 => p1.Name == "X" && p1.Name.Length == 1, emily);
Assert.AreEqual("(({C} /* {X} */.Name /* \"X\" */ == {C} /* \"X\" */) /* True */ && ({C} /* {X} */.Name /* \"X\" */.Length /* 1 */ == {C} /* 1 */) /* True */) /* True */", expr.ToString());
}
public void StringConversion()
{
var emily = TestPerson.CreateEmily();
emily.Name = "X";
using (var expr = ActiveExpression.Create(p1 => p1.Name.Length + 1, emily))
Assert.AreEqual("({C} /* {X} */.Name /* \"X\" */.Length /* 1 */ + {C} /* 1 */) /* 2 */", expr.ToString());
}
public void StringConversion()
{
var john = TestPerson.CreateJohn();
var emily = TestPerson.CreateEmily();
using var expr = ActiveExpression.Create((p1, p2) => CombinePeople(p1, p2), john, emily);
Assert.AreEqual($"{{C}} /* {this} */.CombinePeople({{C}} /* {john} */, {{C}} /* {emily} */) /* {expr.Value} */", expr.ToString());
}
public void ImplicitConversion()
{
using (var expr = ActiveExpression.Create(() => new A() ?? new B()))
{
Assert.IsNull(expr.Fault);
Assert.IsNull(expr.Value);
}
}
public void CreateFromLambda()
{
using (var expr = ActiveExpression.Create <int>(Expression.Lambda(Expression.Negate(Expression.Constant(3)))))
{
Assert.IsNull(expr.Fault);
Assert.AreEqual(-3, expr.Value);
}
}
public void OptimizerAppliedDeMorgan()
{
var a = Expression.Parameter(typeof(bool));
var b = Expression.Parameter(typeof(bool));
using (var expr = ActiveExpression.Create <bool>(Expression.Lambda <Func <bool, bool, bool> >(Expression.AndAlso(Expression.Not(a), Expression.Not(b)), a, b), false, false))
Assert.AreEqual("(!({C} /* False */ || {C} /* False */) /* False */) /* True */", expr.ToString());
}
public void ValueShortCircuiting()
{
var john = TestPerson.CreateJohn();
var emily = TestPerson.CreateEmily();
using (var expr = ActiveExpression.Create((p1, p2) => p1.Name.Length > 1 || p2.Name.Length > 3, john, emily))
Assert.IsTrue(expr.Value);
Assert.AreEqual(0, emily.NameGets);
}
public void ThreeArgumentStringConversion()
{
var john = TestPerson.CreateJohn();
var emily = TestPerson.CreateEmily();
var charles = new TestPerson("Charles");
using (var expr = ActiveExpression.Create((a, b, c) => a + b + c, john, emily, charles))
Assert.AreEqual("(({C} /* {John} */ + {C} /* {Emily} */) /* {John Emily} */ + {C} /* {Charles} */) /* {John Emily Charles} */", expr.ToString());
}
public void LambdaConsistentHashCode()
{
int hashCode1, hashCode2;
using (var expr = ActiveExpression.Create <int>(Expression.Lambda(Expression.Negate(Expression.Constant(3)))))
hashCode1 = expr.GetHashCode();
using (var expr = ActiveExpression.Create <int>(Expression.Lambda(Expression.Negate(Expression.Constant(3)))))
hashCode2 = expr.GetHashCode();
Assert.IsTrue(hashCode1 == hashCode2);
}
public void FaultShortCircuiting()
{
var john = TestPerson.CreateJohn();
using (var expr = ActiveExpression.Create <TestPerson, TestPerson, string>((p1, p2) => p1.Name.Length > 0 ? p1.Name : p2.Name, john, null))
{
Assert.AreEqual(john.Name, expr.Value);
Assert.IsNull(expr.Fault);
}
}
public void TwoArgumentConsistentHashCode()
{
int hashCode1, hashCode2;
using (var expr = ActiveExpression.Create((a, b) => a + b, 1, 2))
hashCode1 = expr.GetHashCode();
using (var expr = ActiveExpression.Create((a, b) => a + b, 1, 2))
hashCode2 = expr.GetHashCode();
Assert.IsTrue(hashCode1 == hashCode2);
}
public void ConsistentHashCode()
{
int hashCode1, hashCode2;
using (var expr = ActiveExpression.Create(() => new TestPerson("Charles")))
hashCode1 = expr.GetHashCode();
using (var expr = ActiveExpression.Create(() => new TestPerson("Charles")))
hashCode2 = expr.GetHashCode();
Assert.IsTrue(hashCode1 == hashCode2);
}
public void EvaluationFault()
{
var john = TestPerson.CreateJohn();
TestPerson?noOne = null;
#pragma warning disable CS8604 // Possible null reference argument.
using var expr = ActiveExpression.Create(() => john + noOne);
#pragma warning restore CS8604 // Possible null reference argument.
Assert.IsNotNull(expr.Fault);
}
public void StringConversion()
{
var john = TestPerson.CreateJohn();
var emily = TestPerson.CreateEmily();
var firstParameter = Expression.Parameter(typeof(TestPerson));
var secondParameter = Expression.Parameter(typeof(TestPerson));
using var expr = ActiveExpression.Create <TestPerson>(Expression.Lambda(Expression.Invoke((Expression <Func <TestPerson, TestPerson, TestPerson> >)((p1, p2) => CombinePeople(p1, p2)), firstParameter, secondParameter), firstParameter, secondParameter), john, emily);
Assert.AreEqual("λ({C} /* Cogs.ActiveExpressions.Tests.ActiveInvocationExpression */.CombinePeople({C} /* {John} */, {C} /* {Emily} */) /* {John Emily} */)", expr.ToString());
}
public void Inequality()
{
using var expr1 = ActiveExpression.Create(() => new TestPerson("Charles"));
using var expr2 = ActiveExpression.Create(() => new TestPerson("Charles"));
using var expr3 = ActiveExpression.Create(() => new TestPerson());
using var expr4 = ActiveExpression.Create(() => new TestPerson("Erin"));
Assert.IsFalse(expr1 != expr2);
Assert.IsTrue(expr1 != expr3);
Assert.IsTrue(expr1 != expr4);
}
public void LambdaValue()
{
var john = TestPerson.CreateJohn();
var emily = TestPerson.CreateEmily();
var firstParameter = Expression.Parameter(typeof(TestPerson));
var secondParameter = Expression.Parameter(typeof(TestPerson));
using var expr = ActiveExpression.Create <TestPerson>(Expression.Lambda(Expression.Invoke((Expression <Func <TestPerson, TestPerson, TestPerson> >)((p1, p2) => CombinePeople(p1, p2)), firstParameter, secondParameter), firstParameter, secondParameter), john, emily);
Assert.AreEqual("John Emily", expr.Value !.Name);
}
public void MethodDelegateValue()
{
Func <TestPerson, TestPerson, TestPerson> @delegate = CombinePeople;
var john = TestPerson.CreateJohn();
var emily = TestPerson.CreateEmily();
var firstParameter = Expression.Parameter(typeof(TestPerson));
var secondParameter = Expression.Parameter(typeof(TestPerson));
using var expr = ActiveExpression.Create <TestPerson>(Expression.Lambda(Expression.Invoke(Expression.Constant(@delegate), firstParameter, secondParameter), firstParameter, secondParameter), john, emily);
Assert.AreEqual("John Emily", expr.Value !.Name);
}
public void FaultShortCircuiting()
{
var john = TestPerson.CreateJohn();
TestPerson?noOne = null;
#pragma warning disable CS8602 // Dereference of a possibly null reference.
using var expr = ActiveExpression.Create((p1, p2) => string.IsNullOrEmpty(p1.Name) && string.IsNullOrEmpty(p2.Name), john, noOne);
#pragma warning restore CS8602 // Dereference of a possibly null reference.
Assert.IsFalse(expr.Value);
Assert.IsNull(expr.Fault);
}
public void NullableConversion()
{
var john = TestPerson.CreateJohn();
using var expr = ActiveExpression.Create(p1 => (p1 == null || p1.Name == null ? (int?)null : p1.Name.Length) + 3, john);
Assert.IsTrue(expr.Value == 7);
Assert.IsNull(expr.Fault);
john.Name = null;
Assert.IsNull(expr.Value);
Assert.IsNull(expr.Fault);
}
public void ConsistentHashCode()
{
int hashCode1, hashCode2;
var john = TestPerson.CreateJohn();
using (var expr = ActiveExpression.Create(p1 => p1.Name != null && p1.Name.Length > 0, john))
hashCode1 = expr.GetHashCode();
using (var expr = ActiveExpression.Create(p1 => p1.Name != null && p1.Name.Length > 0, john))
hashCode2 = expr.GetHashCode();
Assert.IsTrue(hashCode1 == hashCode2);
}