private static T Compile <T>(LambdaExpression ex)
where T : class
{
var lam = LambdaEx.Convert(ex, typeof(T));
return(lam.Compile() as T);
}
public void GetDelegateTypeWorks()
{
Assert.Equal(typeof(Action), LambdaEx.GetDelegateType(typeof(void)));
Assert.Equal(typeof(Action <int>), LambdaEx.GetDelegateType(typeof(void), typeof(int)));
Assert.Equal(typeof(Action <int, string>), LambdaEx.GetDelegateType(typeof(void), typeof(int), typeof(string)));
Assert.Equal(typeof(Func <int>), LambdaEx.GetDelegateType(typeof(int)));
Assert.Equal(typeof(Func <int, string>), LambdaEx.GetDelegateType(typeof(string), typeof(int)));
Assert.Equal(typeof(Func <string, int, string>), LambdaEx.GetDelegateType(typeof(string), typeof(string), typeof(int)));
}
public void InlineWorks()
{
Expression <Func <int, int, int> > add = (a, b) => a + b;
var param = Expression.Parameter(typeof(int), "p");
var inline = LambdaEx.Inline(add, param, param);
Assert.Equal("(p + p)", inline.ToDebugString());
Assert.Throws <ArgumentException>(() => LambdaEx.Inline(add, param));
Assert.Throws <ArgumentException>(() => LambdaEx.Inline(add, param, param, param));
}
public void SignatureMatchWorks()
{
Expression <Func <string, int, string> > f = (s, i) => s + i;
Assert.True(LambdaEx.SignatureMatch(f, typeof(string), typeof(string), typeof(int)));
Assert.False(LambdaEx.SignatureMatch(f, typeof(string), typeof(int), typeof(string)));
Assert.False(LambdaEx.SignatureMatch(f, typeof(string), typeof(int)));
Assert.False(LambdaEx.SignatureMatch(f, typeof(string), typeof(string), typeof(int), typeof(string)));
Assert.False(LambdaEx.SignatureMatch(f, typeof(void), typeof(string), typeof(int)));
Assert.False(LambdaEx.SignatureMatch(f, typeof(string), typeof(string), typeof(string)));
Assert.False(LambdaEx.SignatureMatch(f, typeof(int), typeof(string), typeof(string)));
Expression <Action <IList <string> > > a = s => s.Clear();
Assert.True(LambdaEx.SignatureMatch(a, typeof(void), typeof(IList <string>)));
Assert.False(LambdaEx.SignatureMatch(a, typeof(IList <string>), typeof(IList <string>)));
Assert.False(LambdaEx.SignatureMatch(a, typeof(IList <string>)));
Assert.False(LambdaEx.SignatureMatch(a, typeof(void)));
}
public void ConvertFailsIfNoArguments()
{
Assert.Throws <ArgumentException>(() => LambdaEx.Convert(_convert, typeof(Func <int>)));
}
