public void BadAdd() { var ld = new RecentDictionary <int, int>(); ld.Add(42, 42); // Can't add when key already exists: Assert.Throws <ArgumentException>(() => ld.Add(42, 123)); }
public void ZeroHash() { // Check hashcode of 0, which is a special case. var ld = new RecentDictionary <string, string>(100, new BadHasher()); ld.Add("foo", "bar"); Assert.Equal("bar", ld["foo"]); Assert.True(ld.Remove("foo")); }
public void RemoveMissing() { var ld = new RecentDictionary <string, int>(); for (int i = 0; i < 10; i++) { ld.Add(i.ToString(), i); } Assert.False(ld.Remove("12345")); }
public void RemoveAndResize() { var ld = new RecentDictionary <string, int>(); // Add first 500. for (int i = 0; i < 500; i++) { ld.Add(i.ToString(), i); } // remove everything divisible by 7 for (int i = 0; i < 500; i += 7) { bool removed = ld.Remove(i.ToString()); Assert.True(removed); } // Add 2000 more elements to force resizing. for (int i = 500; i < 2500; i++) { ld.Add(i.ToString(), i); } for (int i = 0; i < 2500; i++) { bool found = ld.TryGetValue(i.ToString(), out int ret); if ((i < 500) && (i % 7 == 0)) { Assert.False(found); } else { Assert.True(found); Assert.Equal(i, ret); } } }
public void ContainsValue() { var ld = new RecentDictionary <string, int>(); for (int i = 0; i < 100; i++) { ld.Add(i.ToString(), i); } ld.Remove("42"); Assert.True(ld.ContainsValue(66)); Assert.True(ld.Values.Contains(88)); Assert.False(ld.ContainsValue(42)); Assert.False(ld.ContainsValue(543434)); }
public void EnumerateEmpty() { var ld = new RecentDictionary <string, int>(); for (int i = 0; i < 10; i++) { ld.Add(i.ToString(), i); } ld.Clear(); Assert.Empty(ld); foreach (var kvp in ld) { Assert.True(false, "shouldn't ever get here"); } }
public void RemoveLru() { var ld = new RecentDictionary <string, int>(); for (int i = 0; i < 42; i++) { ld.Add(i.ToString(), i); } ld.RemoveLeastRecent(); Assert.False(ld.ContainsKey("0")); Assert.True(ld.ContainsKey("1")); Assert.Equal(41, ld.Count); // Access the least-recently used element, make // sure it doesn't get removed. Assert.Equal(1, ld["1"]); ld.RemoveLeastRecent(); Assert.True(ld.ContainsKey("1")); Assert.False(ld.ContainsKey("2")); }
public void EnumerateValues() { var ld = new RecentDictionary <int, int>(); for (int i = 0; i < 100; i++) { ld.Add(i, i); } ld.Remove(99); bool[] returnedVals = new bool[99]; foreach (var val in ld.Values) { Assert.False(returnedVals[val], "value was returned twice from enumerator"); returnedVals[val] = true; } foreach (bool found in returnedVals) { Assert.True(found, "a value was not returned"); } }
public void EnumerateKeys() { var ld = new RecentDictionary <int, int>(); for (int i = 0; i < 100; i++) { ld.Add(i, i); } ld.Remove(99); bool[] returnedKeys = new bool[99]; foreach (var key in ld.Keys) { Assert.False(returnedKeys[key], "key was returned twice from enumerator"); returnedKeys[key] = true; } foreach (bool found in returnedKeys) { Assert.True(found, "a key was not returned"); } }
public void CheckEnumerator() { var ld = new RecentDictionary <string, int>(); for (int i = 0; i < 10; i++) { ld.Add(i.ToString(), i); } bool removed = ld.Remove("9"); Assert.True(removed); int counter = 0; foreach (var kvp in ld) { Assert.True(kvp.Value < 9); counter++; } Assert.Equal(9, counter); }