public void Set_should_throw_ArgumentException_if_key_does_not_exist()
{
//Arrange
var table = new Structures.HashTable <int, string>();
//Act & Assert
Assert.Throws <ArgumentException>(() => table[1] = "1");
}
public void Add_should_throw_ArgumentException_if_key_exists()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
//Act & Assert
Assert.Throws <ArgumentException>(() => table.Add(1, "2"));
}
public void Count_should_return_0_if_table_is_empty()
{
//Arrange
var table = new Structures.HashTable <int, string>();
int expectedCount = 0;
//Act
var count = table.Count;
//Assert
Assert.AreEqual(expectedCount, count);
}
public void TryGet_should_return_true_if_key_exists()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
//Act
var result = table.TryGet(1, out var value);
//Assert
Assert.True(result);
}
public void TryGet_should_return_null_object_if_key_does_not_exist()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
//Act
var result = table.TryGet(2, out var value);
//Assert
Assert.Null(value);
}
public void Contains_should_return_false_if_key_does_not_exist()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
//Act
var result = table.Contains(2);
//Assert
Assert.False(result);
}
public void Contains_should_return_true_if_key_exists()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
//Act
var result = table.Contains(1);
//Assert
Assert.True(result);
}
public void TryGet_should_return_value_if_key_exists()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "2");
//Act
var result = table.TryGet(1, out var outValue);
//Assert
Assert.AreEqual("2", outValue);
}
public void Set_should_remove_entry_by_key_if_value_is_null()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
//Act
table[1] = null;
//Act & Assert
Assert.False(table.Contains(1));
}
public void Get_should_return_value_by_index_if_key_exists()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
//Act
var result = table[1];
//Act & Assert
Assert.AreEqual("1", result);
}
public void Count_should_return_count_of_items_if_table_is_not_empty()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
int expectedCount = 1;
//Act
var count = table.Count;
//Assert
Assert.AreEqual(expectedCount, count);
}
public void Set_should_replace_entry_by_key_if_value_is_not_null()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "2");
var value = "3";
var expectedValue = value;
//Act
table[1] = value;
//Act & Assert
Assert.AreEqual(expectedValue, table[1]);
}
public void Add_should_add_item_if_key_does_not_exist()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
int expectedCount = 2;
//Act
table.Add(2, "1");
var count = table.Count;
//Assert
Assert.AreEqual(expectedCount, count);
}
public void Clear_should_remove_all_items()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
var expectedCount = 0;
//Act
table.Clear();
var count = table.Count;
//Assert
Assert.AreEqual(expectedCount, count);
}
public void Remove_should_decrease_count_if_success()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
var expectedCount = 0;
//Act
table.Remove(1);
var count = table.Count;
//Assert
Assert.AreEqual(expectedCount, count);
}
public void Remove_should_remove_item_if_key_exists()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
var expectedCount = 0;
//Act
table.Remove(1);
var count = table.Count;
//Assert
Assert.AreEqual(expectedCount, count);
}
public void Add_should_increase_count_if_success()
{
//Arrange
var table = new Structures.HashTable <int, string>();
table.Add(1, "1");
int expectedCount = table.Count + 1;
//Act
table.Add(2, "1");
var count = table.Count;
//Assert
Assert.AreEqual(expectedCount, count);
}
public void GetEnumerator_should_return_all_values()
{
//Arrange
var expectedValues = new List <string>()
{
"2", "4", "6", "8"
};
var values = new List <string>();
var table = new Structures.HashTable <int, string>();
table.Add(1, "2");
table.Add(2, "4");
table.Add(3, "6");
table.Add(4, "8");
//Act
foreach (var el in table)
{
values.Add(el);
}
//Assert
Assert.AreEqual(expectedValues, values);
}