public void GetOrCreate_CallsFaultyFactoryOnce()
{
// Arrange
var key = Guid.NewGuid().ToString();
var options = new CacheEntryOptions(TimeSpan.FromMilliseconds(1));
var factoryCallCount = 0;
Func <string, AClass> factory = _ =>
{
factoryCallCount++;
throw new Exception();
};
var cache = Substitute.For <ICache>();
cache.Get(key, typeof(AClass)).Returns((AClass)null);
cache.When(c => c.GetOrCreate(key, typeof(AClass), options, Arg.Any <Func <string, AClass> >()))
.Do(c => c.Arg <Func <string, AClass> >()(key));
var logger = Substitute.For <ILogger <ExceptionHandlingCacheDecorator> >();
var decorator = new ExceptionHandlingCacheDecorator(cache, logger);
// Act / Assert
Assert.Throws <Exception>(() => decorator.GetOrCreate(key, typeof(AClass), options, factory));
Assert.AreEqual(1, factoryCallCount);
}
public void GetOrCreateGeneric_ReturnsCachedValue()
{
// Arrange
var key = Guid.NewGuid().ToString();
var cachedValue = new AClass();
Func <string, AClass> factory = _ => new AClass();
var options = new CacheEntryOptions(TimeSpan.FromMilliseconds(1));
var cache = Substitute.For <ICache>();
cache.GetIfCached(key, out Arg.Any <AClass>()).Returns(x =>
{
x[1] = cachedValue;
return(true);
});
cache.GetOrCreate(key, options, Arg.Any <Func <string, AClass> >()).Returns(cachedValue);
cache.Get(key, typeof(AClass)).Returns(cachedValue);
var logger = Substitute.For <ILogger <ExceptionHandlingCacheDecorator> >();
var decorator = new ExceptionHandlingCacheDecorator(cache, logger);
// Act
var result = decorator.GetOrCreate(key, options, factory);
// Assert
Assert.AreEqual(cachedValue, result);
}
public void GetOrCreateGeneric_HandlesGetException()
{
// Arrange
var key = Guid.NewGuid().ToString();
var factoryValue = new AClass();
Func <string, AClass> factory = _ => factoryValue;
var options = new CacheEntryOptions(TimeSpan.FromMilliseconds(1));
var cache = Substitute.For <ICache>();
cache.Get <AClass>(key).Throws(new Exception());
cache.GetOrCreate(key, options, Arg.Any <Func <string, AClass> >()).Throws(new Exception());
var logger = Substitute.For <ILogger <ExceptionHandlingCacheDecorator> >();
var decorator = new ExceptionHandlingCacheDecorator(cache, logger);
// Act
var result = decorator.GetOrCreate(key, options, factory);
// Assert
Assert.AreEqual(factoryValue, result);
}
public void GetOrCreate_HandlesGetException()
{
// Arrange
var key = Guid.NewGuid().ToString();
var factoryValue = new AClass();
var cache = Substitute.For <ICache>();
cache.Get(key, typeof(AClass)).Throws(new Exception());
var logger = Substitute.For <ILogger <ExceptionHandlingCacheDecorator> >();
var decorator = new ExceptionHandlingCacheDecorator(cache, logger);
// Act
var result = decorator.GetOrCreate(key,
typeof(AClass),
new CacheEntryOptions(new TimeSpan()),
_ => factoryValue);
// Assert
Assert.AreEqual(factoryValue, result);
}
public void GetOrCreate_ReturnsCachedValue()
{
// Arrange
var key = Guid.NewGuid().ToString();
var cachedValue = new AClass();
var options = new CacheEntryOptions(TimeSpan.FromMilliseconds(1));
var cache = Substitute.For <ICache>();
cache.Get(key, typeof(AClass)).Returns(cachedValue);
var logger = Substitute.For <ILogger <ExceptionHandlingCacheDecorator> >();
var decorator = new ExceptionHandlingCacheDecorator(cache, logger);
// Act
var result = decorator.GetOrCreate(key,
typeof(AClass),
options,
_ => null);
// Assert
Assert.AreEqual(cachedValue, result);
}
public void GetOrCreateGeneric_CreatesValueType()
{
// Arrange
var key = Guid.NewGuid().ToString();
var factoryValue = 1234;
Func <string, int> factory = _ => factoryValue;
var options = new CacheEntryOptions(TimeSpan.FromMilliseconds(1));
var cache = Substitute.For <IDistributedCache>();
cache.Get(key).Returns((byte[])null);
var logger = Substitute.For <ILogger <ExceptionHandlingCacheDecorator> >();
var decorator =
new ExceptionHandlingCacheDecorator(new DistributedCache(cache, Substitute.For <ILogger <DistributedCache> >()),
logger);
// Act
var result = decorator.GetOrCreate(key, options, factory);
// Assert
Assert.AreEqual(factoryValue, result);
}
public void GetOrCreate_HandlesSetException()
{
// Arrange
var key = Guid.NewGuid().ToString();
var factoryValue = new AClass();
var options = new CacheEntryOptions(TimeSpan.FromMilliseconds(1));
var cache = Substitute.For <ICache>();
cache.When(c => c.Set(key, factoryValue, options)).Do(_ => throw new Exception());
var logger = Substitute.For <ILogger <ExceptionHandlingCacheDecorator> >();
var decorator = new ExceptionHandlingCacheDecorator(cache, logger);
// Act
var result = decorator.GetOrCreate(key,
typeof(AClass),
options,
_ => factoryValue);
// Assert
Assert.AreEqual(factoryValue, result);
}