public void TestComplexExpression()
{
var newGenerator = new ConstructorExpressionGenerator(ConstructorSelectors.MostSpecific);
int numFoos = 0;
var fooGenerator = new LambdaExpressionGenerator(() => { numFoos++; return new ServiceFoo(); });
var singleBar = new ServiceBar(new ServiceFoo());
var barGenerator = new ConstantExpressionGenerator(singleBar);
newGenerator.DependencyExpressionGenerating += (sender, args) =>
{
IExpressionGenerator generator;
if (args.DependencyType == typeof(ServiceFoo))
generator = fooGenerator;
else if (args.DependencyType == typeof(ServiceBar))
generator = barGenerator;
else
generator = (IExpressionGenerator)sender;
args.Expression = generator.GenerateExpression(args.DependencyType);
};
var expression = newGenerator.GenerateExpression(typeof(Root));
var func = Expression.Lambda<Func<Root>>(expression).Compile();
var r = func();
Assert.IsNotNull(r);
Assert.IsNotNull(r.Bar);
Assert.IsNotNull(r.Foo);
Assert.Greater(numFoos, 0);
Assert.AreSame(r.Bar, singleBar);
Assert.AreSame(r.Bar.Foo, singleBar.Foo);
Assert.AreNotSame(r.Foo, r.Bar.Foo);
Assert.AreNotSame(r.Foo, singleBar.Foo);
}
public void TransientProducerWithConstantExpressionShouldReturnSame()
{
var o1 = new object();
IExpressionGenerator generator = new ConstantExpressionGenerator(o1);
IInstanceProvider provider = new TransientInstanceProvider(typeof(object), generator);
var o2 = provider.GetInstance();
Assert.NotNull(o2);
Assert.AreSame(o1, o2);
// Stupid, but let's be sure
foreach (var obj in Enumerable.Range(0, 100).Select(i => provider.GetInstance()))
Assert.AreSame(o1, obj);
}