public void RemoveKeyShoulThrowAnErrorIfKeyIsNull()
{
var dictionary = new ManualDictionary <string, string>()
{
{ "first", "element" },
{ "second", "element" },
};
Assert.False(dictionary.Remove("third"));
Assert.Throws <ArgumentNullException>(() => dictionary.Remove(null));
}
public void RemoveKeyShouldReturnFalseIfKeyIsNotInDictionary()
{
var dictionary = new ManualDictionary <int, string>();
dictionary.Add(1, "a");
dictionary.Add(2, "b");
dictionary.Add(10, "c");
dictionary.Add(11, "c");
dictionary.Add(12, "c");
Assert.True(dictionary.ContainsKey(2));
Assert.False(dictionary.Remove(3));
Assert.False(dictionary.Remove(13));
Assert.False(dictionary.Remove(33));
}
public void RemoveKeyValuePairShoulReturnFalseIfKeyIsInDictionaryWithDifferentValue()
{
var dictionary = new ManualDictionary <string, string>()
{
{ "first", "element" },
{ "second", "elements" },
};
var firstPair = new KeyValuePair <string, string>("first", "element");
var secondPair = new KeyValuePair <string, string>("second", "element");
Assert.True(dictionary.Remove(firstPair));
Assert.False(dictionary.Remove(secondPair));
Assert.NotEmpty(dictionary);
}
public void RemoveKeyValuePairShoulReturnTrueIfPairIsInDictionary()
{
var dictionary = new ManualDictionary <string, string>()
{
{ "first", "element" },
{ "second", "element" },
};
var firstPair = new KeyValuePair <string, string>("first", "element");
var secondPair = new KeyValuePair <string, string>("second", "element");
Assert.True(dictionary.Remove(firstPair));
Assert.True(dictionary.Remove(secondPair));
Assert.Empty(dictionary);
}
public void RemoveKeyShouldReturnTrueIfKeysInConflictAreDeletedFromDictionary()
{
var dictionary = new ManualDictionary <int, string>();
dictionary.Add(1, "a");
dictionary.Add(2, "b");
dictionary.Add(10, "c");
dictionary.Add(11, "c");
dictionary.Add(12, "c");
Assert.True(dictionary.ContainsKey(2));
Assert.True(dictionary.ContainsKey(12));
Assert.True(dictionary.Remove(2));
Assert.False(dictionary.ContainsKey(2));
Assert.True(dictionary.Remove(12));
Assert.False(dictionary.ContainsKey(12));
}
public void TestAddingElementAfterRemoveKeyValuePairAtFreeIndex()
{
var dictionary = new ManualDictionary <int, string>();
dictionary.Add(1, "a");
dictionary.Add(2, "b");
dictionary.Add(10, "c");
dictionary.Add(11, "c");
dictionary.Add(12, "c");
Assert.True(dictionary.ContainsKey(10));
Assert.True(dictionary.Remove(10));
Assert.False(dictionary.Remove(13));
Assert.False(dictionary.Remove(33));
dictionary.Add(3, "b");
var enumerator = dictionary.GetEnumerator();
Assert.True(enumerator.MoveNext());
Assert.Equal(11, enumerator.Current.Key);
Assert.Equal("c", enumerator.Current.Value);
Assert.True(enumerator.MoveNext());
Assert.Equal(1, enumerator.Current.Key);
Assert.Equal("a", enumerator.Current.Value);
Assert.True(enumerator.MoveNext());
Assert.Equal(12, enumerator.Current.Key);
Assert.Equal("c", enumerator.Current.Value);
Assert.True(enumerator.MoveNext());
Assert.Equal(2, enumerator.Current.Key);
Assert.Equal("b", enumerator.Current.Value);
Assert.True(enumerator.MoveNext());
Assert.Equal(3, enumerator.Current.Key);
Assert.Equal("b", enumerator.Current.Value);
Assert.False(enumerator.MoveNext());
Assert.Equal(new[] { 11, 1, 12, 2, 3 }, dictionary.Keys);
}