public void ShouldLoadTheValueForMissingKey() {
CacheBuilder<string> cache_builder = new CacheBuilder<string>();
LoadingCacheMock<string> cache =
new LoadingCacheMock<string>(cache_builder);
CacheLoader<string> loader = new StringCacheLoader();
string cached = cache.GetIfPresent("missing-key");
Assert.IsNull(cached);
cached = cache.Get("missing-key", loader);
Assert.IsNotNull(cached);
}
public void ShouldReplaceCachedValueWhenKeyAlreadyExists() {
CacheBuilder<string> cache_builder = new CacheBuilder<string>();
LoadingCacheMock<string> ref_cache =
new LoadingCacheMock<string>(cache_builder);
ref_cache.Put("already-in-cache-key", "original-value");
string cached = ref_cache.GetIfPresent("already-in-cache-key");
Assert.AreEqual("original-value", cached);
ref_cache.Put("already-in-cache-key", "new-value");
cached = ref_cache.GetIfPresent("already-in-cache-key");
Assert.AreEqual("new-value", cached);
}
public void ShouldReturnsDefaultValueWhenKeyIsNotFound() {
CacheBuilder<string> ref_cache_builder = new CacheBuilder<string>();
LoadingCacheMock<string> ref_cache =
new LoadingCacheMock<string>(ref_cache_builder);
string cached = ref_cache.GetIfPresent("missing-key");
Assert.AreEqual(null, cached);
CacheBuilder<long> val_cache_builder = new CacheBuilder<long>();
LoadingCacheMock<long> val_cache =
new LoadingCacheMock<long>(val_cache_builder);
long val_cached = val_cache.GetIfPresent("missing-key");
Assert.AreEqual(default(long), val_cached);
}
public void ShouldStoreValueInCache() {
CacheBuilder<string> ref_cache_builder = new CacheBuilder<string>();
LoadingCacheMock<string> ref_cache =
new LoadingCacheMock<string>(ref_cache_builder);
CacheBuilder<long> val_cache_builder = new CacheBuilder<long>();
LoadingCacheMock<long> val_cache =
new LoadingCacheMock<long>(val_cache_builder);
ref_cache.Put("ref-cache-key", "ref-cache-value");
string ref_cached = ref_cache.GetIfPresent("ref-cache-key");
Assert.AreEqual(ref_cached, "ref-cache-value");
val_cache.Put("val-cache-key", 50);
long val_cached = val_cache.GetIfPresent("val-cache-key");
Assert.AreEqual(50, val_cached);
}
public void ShouldThrowExceptionWhenCacheLoaderReturnsNull() {
CacheBuilder<string> ref_cache_builder = new CacheBuilder<string>();
LoadingCacheMock<string> ref_cache =
new LoadingCacheMock<string>(ref_cache_builder);
CacheBuilder<long> val_cache_builder = new CacheBuilder<long>();
LoadingCacheMock<long> val_cache =
new LoadingCacheMock<long>(val_cache_builder);
CacheLoader<string> ref_loader = new StringCacheLoader();
try {
ref_cache.Get("missing-ref-key", ref_loader);
} catch (ExecutionException exception) {
Assert.IsAssignableFrom<InvalidCacheLoadException>(
exception.InnerException);
}
CacheLoader<long> val_loader =
CacheLoader<long>.From(delegate(string key) { return default(long); });
Assert.DoesNotThrow(
delegate() { val_cache.Get("missing-ref-key", val_loader); });
}
public void ShouldNotThrowExceptionWhenRemovingNonExistentKey() {
CacheBuilder<string> cache_builder = new CacheBuilder<string>();
LoadingCacheMock<string> ref_cache =
new LoadingCacheMock<string>(cache_builder);
ref_cache.Remove("missing-key");
}
public void ShouldThrowExceptionWhenLoadFail() {
CacheBuilder<long> cache_builder = new CacheBuilder<long>();
LoadingCacheMock<long> cache = new LoadingCacheMock<long>(cache_builder);
ThrowableLongCacheLoader long_cache_loader =
new ThrowableLongCacheLoader();
try {
cache.Get("missing-key", long_cache_loader);
} catch (ExecutionException exception) {
Assert.IsAssignableFrom<ArgumentException>(exception.InnerException);
}
}
public void ShouldThrowExceptionWhenKeyIsNull() {
CacheBuilder<string> cache_builder = new CacheBuilder<string>();
LoadingCacheMock<string> cache =
new LoadingCacheMock<string>(cache_builder);
CacheLoader<string> loader = new StringCacheLoader();
Assert.Throws<ArgumentNullException>(
delegate() { cache.Get(null, loader); });
Assert.Throws<ArgumentNullException>(
delegate() { cache.GetIfPresent(null); });
Assert.Throws<ArgumentNullException>(
delegate() { cache.Put(null, string.Empty); });
Assert.Throws<ArgumentNullException>(delegate() { cache.Remove(null); });
}