public void Get_KeyIsNotInTheStorage_ReturnsNull()
{
CacheItemsStorage cacheItemsStorage = new CacheItemsStorage();
CacheItem actual = cacheItemsStorage.Get("Some key");
Assert.AreEqual(null, actual);
}
public void ChangeValue_KeyAlreadyExists_ThrownInvalidOperationException()
{
string repeatedKey = "Key is repeated";
string value = "Some value";
var expirationTime = new TimeSpan(0, 0, 30);
CacheItemsStorage cacheItemsStorage = new CacheItemsStorage();
Assert.Throws <InvalidOperationException>(() => cacheItemsStorage.ChangeValue(repeatedKey, value, expirationTime));
}
public void Add_KeyValueAndExpirationTimeAreValid_ObjectIsAddedToTheCache()
{
string key = "Some key";
string value = "Some value";
var expirationTime = new TimeSpan(0, 0, 30);
var cacheItemsStorage = new CacheItemsStorage();
cacheItemsStorage.Add(key, value, expirationTime);
Assert.AreEqual(value, cacheItemsStorage.Get(key).Value);
}
public void Get_KeyOfTheObjectFromTheCache_ObjectReturns()
{
string key = "Some key";
int expected = 100;
CacheItemsStorage cacheItemsStorage = new CacheItemsStorage();
cacheItemsStorage.Add(key, expected, new TimeSpan(0, 10, 0));
CacheItem actual = cacheItemsStorage.Get(key);
Assert.AreEqual(expected, actual.Value);
}
public void ChangeValue_KeyValueAndExpirationTimeAreValid_ObjectIsUpdatedInTheCache()
{
string key = "Some key";
string value = "Some value";
string newValue = "New value";
var expirationTime = new TimeSpan(0, 0, 30);
var cacheItemsStorage = new CacheItemsStorage();
cacheItemsStorage.Add(key, value, expirationTime);
cacheItemsStorage.ChangeValue(key, newValue, expirationTime);
Assert.AreEqual(newValue, cacheItemsStorage.Get(key).Value);
}
public void Add_AddObjectsOfDifferentTypesToTheCache_ObjectsAreAddedToTheCache()
{
string keyOfString = "String key";
string valueOfString = "Some value";
string keyOfInt = "Int key";
int valueOfInt = 100;
var expirationTime = new TimeSpan(0, 0, 30);
var cacheItemsStorage = new CacheItemsStorage();
cacheItemsStorage.Add(keyOfString, valueOfString, expirationTime);
cacheItemsStorage.Add(keyOfInt, valueOfInt, expirationTime);
Assert.AreEqual(valueOfString, cacheItemsStorage.Get(keyOfString).Value);
Assert.AreEqual(valueOfInt, cacheItemsStorage.Get(keyOfInt).Value);
}
public void ClearExpired_SomeObjectsInTheCacheAndSomeOfThemAreExpired_ExpiredObjectsAreRemovedFromTheCache()
{
string key1 = "key1";
string key2 = "key2";
string key3 = "key3";
string key4 = "key4";
CacheItemsStorage cacheItemsStorage = new CacheItemsStorage();
cacheItemsStorage.Add(key1, "value1", new TimeSpan(0, 0, 1));
cacheItemsStorage.Add(key2, "value2", new TimeSpan(0, 0, 2));
cacheItemsStorage.Add(key3, "value3", new TimeSpan(0, 0, 10));
cacheItemsStorage.Add(key4, "value4", new TimeSpan(0, 0, 1));
Thread.Sleep(2000);
cacheItemsStorage.ClearExpired();
Assert.AreEqual("value3", cacheItemsStorage.Get(key3).Value);
Assert.AreEqual(null, cacheItemsStorage.Get(key1));
Assert.AreEqual(null, cacheItemsStorage.Get(key2));
Assert.AreEqual(null, cacheItemsStorage.Get(key4));
}
