/
LazyTests.cs
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/
LazyTests.cs
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using System;
using LightInject.SampleLibrary;
using Xunit;
namespace LightInject.Tests
{
public class LazyTests : TestBase
{
[Fact]
public void GetInstance_LazyService_ReturnsInstance()
{
var container = CreateContainer();
container.Register<IFoo, Foo>();
var lazyInstance = container.GetInstance<Lazy<IFoo>>();
Assert.IsAssignableFrom<Lazy<IFoo>>(lazyInstance);
}
[Fact]
public void GetInstance_LazyService_DoesNotCreateTarget()
{
var container = CreateContainer();
container.Register<IFoo, LazyFoo>();
LazyFoo.Instances = 0;
container.GetInstance<Lazy<IFoo>>();
Assert.Equal(0, LazyFoo.Instances);
}
[Fact]
public void GetInstance_LazyService_CreatesTargetWhenValuePropertyIsAccessed()
{
var container = CreateContainer();
container.Register<IFoo, Foo>();
var instance = container.GetInstance<Lazy<IFoo>>();
Assert.IsAssignableFrom<Foo>(instance.Value);
}
[Theory]
[MemberData(nameof(StringDataGenerator.NullOrWhiteSpaceData), MemberType = typeof(StringDataGenerator))]
public void CanGetInstance_LazyForKnownService_ReturnsTrue(string serviceName)
{
var container = CreateContainer();
container.Register<IFoo, Foo>();
Assert.True(container.CanGetInstance(typeof(Lazy<IFoo>), serviceName));
}
[Theory]
[MemberData(nameof(StringDataGenerator.NullOrWhiteSpaceData), MemberType = typeof(StringDataGenerator))]
public void CanGetInstance_LazyForUnknownService_ReturnsFalse(string serviceName)
{
var container = CreateContainer();
Assert.False(container.CanGetInstance(typeof(Lazy<IFoo>), serviceName));
}
[Fact]
public void GetInstance_NamedService_ReturnsLazyThatResolvesNamedService()
{
var container = CreateContainer();
container.Register<IFoo, Foo>();
container.Register<IFoo, AnotherFoo>("AnotherFoo");
container.Register<Lazy<IFoo>>(f => new Lazy<IFoo>(() => f.GetInstance<IFoo>("AnotherFoo")));
var anotherLazyFoo = container.GetInstance<Lazy<IFoo>>();
Assert.IsType<AnotherFoo>(anotherLazyFoo.Value);
}
[Fact]
public void GetInstance_LazySingleton_GetsDisposedWhenContainerIsDisposed()
{
var container = CreateContainer();
container.Register<IFoo, DisposableFoo>(new PerContainerLifetime());
var lazyInstance = container.GetInstance<Lazy<IFoo>>();
var instance = (DisposableFoo)lazyInstance.Value;
container.Dispose();
Assert.True(instance.IsDisposed);
}
}
}