public void Get_value_for_key()
{
var sut = new FilesystemCache(CACHE_PATH);
sut.ReplaceOrAdd("mykey", "hello");
Assert.AreEqual("hello", sut.Get("mykey"));
}
public void Creating_cache_creates_a_directory()
{
if (Directory.Exists(CACHE_PATH)) Directory.Delete(CACHE_PATH, true);
var sut = new FilesystemCache(CACHE_PATH);
Assert.IsTrue(Directory.Exists(CACHE_PATH));
}
public void Adding_key_creates_file_and_stores_value()
{
const string entry_filename = CACHE_PATH + @"\mykey.txt";
File.Delete(entry_filename);
var sut = new FilesystemCache(CACHE_PATH);
sut.Add("mykey", "hello");
Assert.AreEqual("hello", File.ReadAllText(entry_filename));
}
public void Clear_removes_all_entries()
{
var sut = new FilesystemCache(CACHE_PATH);
sut.Add("key1", "1");
sut.Add("key2", "2");
sut.Clear();
Assert.AreEqual(0, Directory.GetFiles(CACHE_PATH).Length);
}
public void Adding_existing_key_does_not_overwrite_value()
{
const string entry_filename = CACHE_PATH + @"\mykey.txt";
File.Delete(entry_filename);
var sut = new FilesystemCache(CACHE_PATH);
sut.Add("mykey", "hello");
sut.Add("mykey", "world");
Assert.AreEqual("hello", File.ReadAllText(entry_filename));
}
public void Increment_existing_value_returns_new_value()
{
var sut = new FilesystemCache(CACHE_PATH);
sut.ReplaceOrAdd("mycounter", "1");
Assert.AreEqual(100, sut.Increment("mycounter", 99));
}
public void Increment_an_non_existent_value_creates_it_and_returns_amount()
{
var sut = new FilesystemCache(CACHE_PATH);
sut.Remove("mycounter");
Assert.AreEqual(1, sut.Increment("mycounter", 1));
}
public void Getting_non_existent_value_causes_exception()
{
var sut = new FilesystemCache(CACHE_PATH);
Assert.Throws<KeyValueStoreException>(() => sut.Get("non existent key"));
}
public void Try_getting_a_value_that_exists()
{
var sut = new FilesystemCache(CACHE_PATH);
sut.ReplaceOrAdd("mykey", "hello");
var value = "";
Assert.IsTrue(sut.TryGet("mykey", out value));
Assert.AreEqual("hello", value);
}
public void Try_getting_a_non_existent_value()
{
var sut = new FilesystemCache(CACHE_PATH);
var value = "";
Assert.IsFalse(sut.TryGet("non existent key", out value));
}
public void Replace_non_existent_key_creates_it()
{
const string entry_filename = CACHE_PATH + @"\mykey.txt";
File.Delete(entry_filename);
var sut = new FilesystemCache(CACHE_PATH);
sut.ReplaceOrAdd("mykey", "hello");
Assert.AreEqual("hello", File.ReadAllText(entry_filename));
}
public void Replace_an_existing_value()
{
const string entry_filename = CACHE_PATH + @"\mykey.txt";
var sut = new FilesystemCache(CACHE_PATH);
sut.Add("mykey", "will be overwritten");
sut.ReplaceOrAdd("mykey", "hello");
Assert.AreEqual("hello", File.ReadAllText(entry_filename));
}
public void Remove_a_key()
{
const string entry_filename = CACHE_PATH + @"\mykey.txt";
var sut = new FilesystemCache(CACHE_PATH);
sut.Add("mykey", "to be deleted");
sut.Remove("mykey");
Assert.IsFalse(File.Exists(entry_filename));
}
public void Remoing_a_non_existing_key_has_no_effect()
{
var sut = new FilesystemCache(CACHE_PATH);
sut.Remove("non existent key");
}