public void TryLayeredCatch()
{
Flexpression <Func <string> >
.Create()
.Set <string>("trace", () => string.Empty)
.Try()
.Try()
.Try()
.Set <string, string>("trace", trace => trace + "a")
.Throw(() => new ArgumentNullException("b"))
.Catch <ArgumentNullException>("ex")
.Set <string, ArgumentNullException, string>("trace", (trace, ex) => trace + ex.ParamName)
.Throw()
.Finally()
.Set <string, string>("trace", trace => trace + "c")
.End()
.End()
.Catch <ArgumentException>("ex2")
.Set <string, ArgumentException, string>("trace", (trace, ex2) => trace + ex2.ParamName)
.Throw(() => new NotImplementedException())
.EndTry()
.End()
.Catch()
.Set <string, string>("trace", trace => trace + "d")
.End()
.EndTry()
.Return <string, string>(trace => trace)
.CreateLambda()
.TestExpression("abcbd");
}
public void FlexpressionDeclareLabelTargetWithDuplicateName()
{
var flexpression = Flexpression <Action <int[]> > .Create().End();
flexpression.DeclareLabelTarget(Expression.Label(typeof(void), "a"));
flexpression.DeclareLabelTarget(Expression.Label(typeof(void), "a"));
}
public void IfWithTwoElses()
{
var ifBlock = Flexpression <Action <int[]> > .Create().If(() => false).End();
ifBlock.Else();
ifBlock.Else();
}
public void ExpressionRewriterFailureWithOuterVariables()
{
int i = 42;
Flexpression <Func <int> > .Create(false)
.Return <int>(() => i);
}
public void BlockInputValidation()
{
var block = Flexpression <Action <int[]> > .Create();
block.ValidateInputCase
(
new InputCase("Act", typeof(ArgumentNullException), new object[] { null }),
new InputCase("Declare", typeof(ArgumentException), new object[] { null }),
new InputCase("Declare", typeof(ArgumentException), new object[] { "" }),
new InputCase("Declare", typeof(ArgumentException), new object[] { " " }),
new InputCase("DeclareLabelTarget", typeof(ArgumentNullException), new object[] { null }),
new InputCase("Do", typeof(ArgumentNullException), new object[] { null }),
new InputCase("Foreach", typeof(ArgumentException), new object[] { null, (Expression <Func <IEnumerable> >)(() => new int[0]) }),
new InputCase("Foreach", typeof(ArgumentException), new object[] { "", (Expression <Func <IEnumerable> >)(() => new int[0]) }),
new InputCase("Foreach", typeof(ArgumentException), new object[] { " ", (Expression <Func <IEnumerable> >)(() => new int[0]) }),
new InputCase("Foreach", typeof(ArgumentNullException), new object[] { "a", null }),
new InputCase("If", typeof(ArgumentNullException), new object[] { null }),
new InputCase("InsertLabel", typeof(ArgumentException), new object[] { null, null }),
new InputCase("Return", typeof(ArgumentNullException), new object[] { null }),
new InputCase("Set", typeof(ArgumentNullException), new object[] { "a", null }),
new InputCase("Set", typeof(ArgumentException), new object[] { null, null }),
new InputCase("Set", typeof(ArgumentException), new object[] { "", null }),
new InputCase("Set", typeof(ArgumentException), new object[] { " ", null }),
new InputCase("Switch", typeof(ArgumentNullException), new object[] { null }),
new InputCase("Throw", typeof(ArgumentNullException), new object[] { null }),
new InputCase("Using", typeof(ArgumentNullException), new object[] { "a", null }),
new InputCase("Using", typeof(ArgumentException), new object[] { null, null }),
new InputCase("Using", typeof(ArgumentException), new object[] { "", null }),
new InputCase("Using", typeof(ArgumentException), new object[] { " ", null }),
new InputCase("While", typeof(ArgumentNullException), new object[] { null })
);
}
public void BlockSwitchExercise()
{
Expression inputAction;
var inputs = Enumerable.Range(0, 17).ToArray();
var callCount = 0;
var expectedCallCount = 0;
Func <int[], int> interceptor = (int[] arguments) =>
{
++callCount;
Assert.IsTrue(arguments.Length <= inputs.Length);
CollectionAssert.AreEqual(inputs.Take(arguments.Length).ToArray(), arguments);
return(42);
};
var funcs = Utility.CreateFuncs <int, int>(interceptor);
var block = Flexpression <Action <int[]> > .Create(true, "i");
var blockType = block.GetType();
for (int j = 0; j < inputs.Length; ++j)
{
int k = j;
block.Set <int[], int>(string.Format("p{0}", j + 1), i => i[k]);
}
foreach (var genericMethod in blockType.GetMethods().Where(x => (x.Name == "Switch")))
{
var methodToInvoke = genericMethod.MakeMethodConcrete <int, int>();
var parameterType = methodToInvoke.GetParameters()[0].ParameterType;
if (funcs.TryGetValue(parameterType, out inputAction))
{
++expectedCallCount;
if (funcs.TryGetValue(parameterType, out inputAction))
{
var switchBlock = (Switch <Block <Flexpression <Action <int[]> > >, int>)methodToInvoke.Invoke(block, new object[] { inputAction });
switchBlock
.Case(() => 0)
.Begin()
.End()
.EndSwitch();
}
else if (parameterType != typeof(Expression))
{
Assert.Fail("Unable to find matching action for {0}.", parameterType.GetFriendlyName());
}
}
}
var method = block.End().Compile();
method(inputs);
Assert.AreEqual <int>(expectedCallCount, callCount);
}
public void SwitchCreateExpressionWithNoContentInSwitch()
{
Flexpression <Func <int> >
.Create()
.Switch(() => 0)
.CreateExpression(null);
}
public void SwitchCreateExpressionWithNonNullArgument()
{
Flexpression <Func <int> >
.Create()
.Switch(() => 0)
.CreateExpression(Enumerable.Empty <Expression>());
}
public void SwitchAssigningNullDefaultBody()
{
Flexpression <Func <int> >
.Create()
.Switch(() => 0)
.AssignDefaultBody(null);
}
public void SwitchWithNoContent()
{
Flexpression <Func <int> >
.Create()
.Switch(() => 0)
.EndSwitch();
}
public void IFlexpressionAllowRethrowWithinCatch()
{
var loopBlock = Flexpression <Action <int> > .Create().Try().End().Catch().Do(() => true);
var usingBlock = loopBlock.Using("iter", () => Enumerable.Empty <int>().GetEnumerator());
var switchBlock = usingBlock.Switch(() => 5);
var switchCaseBlock = switchBlock.Case(() => 5);
var block = switchCaseBlock.Begin().Try().If(() => true);
var ifBlock = block.Act(() => Console.WriteLine("Fail!")).End();
var catchBlock = ifBlock.EndIf().End().Catch();
var tryBlock = catchBlock.End();
foreach (IFlexpression fe in new IFlexpression[]
{
loopBlock,
usingBlock,
switchBlock,
switchCaseBlock,
block,
ifBlock,
catchBlock,
tryBlock
})
{
Assert.IsTrue(fe.AllowRethrow());
}
}
public void BlockInsertLabelWithDuplicateLabelName()
{
LabelTarget labelTarget;
Flexpression <Action> .Create()
.InsertLabel("a", out labelTarget)
.InsertLabel("a", out labelTarget);
}
public void ExpressionRewriterTypeCompatibility()
{
var method = Flexpression <Func <StringReader, int> > .Create(true)
.Return <TextReader, int>(p1 => p1.Peek())
.Compile();
Assert.AreEqual <int>((int)'a', method(new StringReader("abc")));
}
public void IfInputValidation()
{
var ifBlock = Flexpression <Action <int[]> > .Create().If(() => false).End();
ifBlock.ValidateInputCase
(
new InputCase("ElseIf", typeof(ArgumentNullException), new object[] { null })
);
}
public void BlockSetWithNullableType()
{
Flexpression <Func <Nullable <int>, int> >
.Create()
.Set <Nullable <int>, int>("newValue", p1 => p1.Value)
.Return <int, int>(newValue => newValue)
.CreateLambda()
.TestExpression(42, new Nullable <int>(42));
}
public void SwitchCaseCaseInputValidation()
{
var switchBlock = Flexpression <Action <int[]> > .Create().Switch(() => 2).Case(() => 3);
switchBlock.ValidateInputCase
(
new InputCase("Case", typeof(ArgumentNullException), new object[] { null })
);
}
public void TryCreateExpressionWithoutCatchFinally()
{
var tryBlock = Flexpression <Func <int> >
.Create()
.Try()
.End();
tryBlock.CreateExpression(null);
}
public void FlexpressionCompileWithDebugInfoGenerator()
{
var method = Flexpression <Func <int> >
.Create()
.Return <int>(() => 234)
.Compile(null, false, DebugInfoGenerator.CreatePdbGenerator());
Assert.AreEqual <int>(234, method());
}
public void SwitchWithTwoDefaults()
{
Flexpression <Func <int> >
.Create()
.Switch(() => 0)
.Default()
.Begin()
.Return <int>(() => 5)
.Default();
}
public void ExpressionRewriterTypeMismatch()
{
int i = 42;
var method = Flexpression <Func <int, int> > .Create(true)
.Return <string, int>(p1 => p1.Length)
.Compile();
Assert.AreEqual <int>(i, method(i));
}
public void ExpressionRewriterSuccessWithParameters()
{
int i = 42;
var method = Flexpression <Func <int, int> > .Create(true)
.Return <int, int>(p1 => p1)
.Compile();
Assert.AreEqual <int>(i, method(i));
}
public void ExpressionRewriterSuccessWithOuterVariables()
{
int i = 42;
var method = Flexpression <Func <int> > .Create(true)
.Return <int>(() => i)
.Compile();
Assert.AreEqual <int>(i, method());
}
/// <summary>
/// The Flexpressions version of a summation function.
/// </summary>
/// <returns>The <see cref="LambdaExpression"/> representing the summation function.</returns>
private LambdaExpression FlexpressionSummation()
{
return(Flexpression <Func <IEnumerable <int>, int> >
.Create()
.Set <int>("sum", () => 0)
.Foreach <int, IEnumerable <int>, IEnumerable <int> >("x", p1 => p1)
.Set <int, int, int>("sum", (x, sum) => x + sum)
.End()
.Return <int, int>(sum => sum)
.CreateLambda());
}
public void TryWithNothingElse()
{
var e = Flexpression <Func <IEnumerable <int>, int> >
.Create()
.Try()
.Act(() => Console.WriteLine("Fail!"))
.End()
.EndTry()
.End()
.Compile();
}
public void SwitchCaseWithCaseThenDefaultWithNonNullArgument()
{
var method = Flexpression <Func <int> >
.Create()
.Switch(() => 0)
.Case(() => 4)
.Begin()
.Return <int>(() => 5)
.Case(() => 2)
.CreateExpression(Enumerable.Empty <Expression>());
}
public void BlockBreak()
{
Flexpression <Func <bool> >
.Create()
.Set <int>("counter", () => 0)
.While <int>(counter => counter < 5)
.Set <int, int>("counter", counter => counter + 1)
.Break()
.Return <int, bool>(counter => counter == 1)
.CreateLambda()
.TestExpression(true);
}
public void TryWithRethrowNotInCatch()
{
var e = Flexpression <Func <IEnumerable <int>, int> >
.Create()
.Try()
.Throw()
.Catch()
.End()
.EndTry()
.End()
.Compile();
}
public void BlockThrowExercise()
{
Expression inputAction;
var inputs = Enumerable.Range(0, 17).ToArray();
Func <int[], Exception> interceptor = (int[] arguments) =>
{
Assert.IsTrue(arguments.Length <= inputs.Length);
CollectionAssert.AreEqual(inputs.Take(arguments.Length).ToArray(), arguments);
return(new NotImplementedException());
};
var funcs = Utility.CreateFuncs <int, Exception>(interceptor);
var blockType = typeof(Block <Flexpression <Action <int[]> > >);
foreach (var genericMethod in blockType.GetMethods().Where(x => (x.Name == "Throw") && (x.GetParameters().Length > 0)))
{
var methodToInvoke = genericMethod.MakeMethodConcrete <int, int>();
var parameterType = methodToInvoke.GetParameters()[0].ParameterType;
if (funcs.TryGetValue(parameterType, out inputAction))
{
if (funcs.TryGetValue(parameterType, out inputAction))
{
var block = Flexpression <Action <int[]> > .Create(true, "i");
for (int j = 0; j < inputs.Length; ++j)
{
int k = j;
block.Set <int[], int>(string.Format("p{0}", j + 1), i => i[k]);
}
methodToInvoke.Invoke(block, new object[] { inputAction });
try
{
block.End().Compile()(inputs);
Assert.Fail("NotImplementedException expected.");
}
catch (NotImplementedException)
{
/* Intentionally left blank. */
}
}
else if (parameterType != typeof(Expression))
{
Assert.Fail("Unable to find matching action for {0}.", parameterType.GetFriendlyName());
}
}
}
}
public void TryInputValidation()
{
var tryBlock = Flexpression <Action <int[]> > .Create().Try().End();
tryBlock.ValidateInputCase
(
new InputCase("Catch", typeof(ArgumentException), new object[] { null }),
new InputCase("Catch", typeof(ArgumentException), new object[] { "" }),
new InputCase("Catch", typeof(ArgumentException), new object[] { " " }),
new InputCase("CreateExpression", typeof(ArgumentException), new object[] { Enumerable.Empty <Expression>() }),
new InputCase("DeclareLabelTarget", typeof(ArgumentNullException), new object[] { null })
);
}
public void TryWithCatchSpecificException()
{
Flexpression <Func <bool> >
.Create()
.Try()
.Throw(() => new MulticastNotSupportedException())
.Catch <MulticastNotSupportedException>()
.Return <bool>(() => true)
.EndTry()
.Return <bool>(() => false)
.CreateLambda()
.TestExpression(true);
}
