| public static Find ( Array input, int value ) : int | ||
| input | Array | |
| value | int | |
| return | int | |
public void A_value_smaller_than_the_arrays_smallest_value_is_not_included()
{
var array = new[] { 1, 3, 4, 6, 8, 9, 11 };
var value = 0;
Assert.Equal(-1, BinarySearch.Find(array, value));
}
public void A_value_larger_than_the_arrays_largest_value_is_not_found()
{
var array = new[] { 1, 3, 4, 6, 8, 9, 11 };
var value = 13;
Assert.Equal(-1, BinarySearch.Find(array, value));
}
public void Finds_a_value_at_the_end_of_an_array()
{
var array = new[] { 1, 3, 4, 6, 8, 9, 11 };
var value = 11;
Assert.Equal(6, BinarySearch.Find(array, value));
}
public void A_value_larger_than_the_arrays_largest_value_is_not_included()
{
var array = new[] { 1, 3, 4, 6, 8, 9, 11 };
var sut = new BinarySearch(array);
Assert.Equal(-1, sut.Find(13));
}
public void Identifies_that_a_value_is_not_included_in_the_array()
{
var array = new[] { 1, 3, 4, 6, 8, 9, 11 };
var value = 7;
Assert.Equal(-1, BinarySearch.Find(array, value));
}
public void TestBinarySearchReturnsCorrectIndex()
{
var expected = 0;
var index = BinarySearch.Find(new int[] { 1, 2, 3, 4, 5, 6 }, 1);
Assert.AreEqual(expected, index);
}
public void Nothing_is_included_in_an_empty_array()
{
var array = Array.Empty <int>();
var value = 1;
Assert.Equal(-1, BinarySearch.Find(array, value));
}
public void Identifies_that_a_value_is_not_included_in_the_array()
{
var array = new[] { 1, 3, 4, 6, 8, 9, 11 };
var sut = new BinarySearch(array);
Assert.Equal(-1, sut.Find(7));
}
public void Finds_a_value_in_an_array_with_one_element()
{
var array = new[] { 6 };
var sut = new BinarySearch(array);
Assert.Equal(0, sut.Find(6));
}
public void Finds_a_value_at_the_end_of_an_array()
{
var array = new[] { 1, 3, 4, 6, 8, 9, 11 };
var sut = new BinarySearch(array);
Assert.Equal(6, sut.Find(11));
}
public void Finds_a_value_in_an_array_of_even_length()
{
var array = new[] { 1, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377 };
var sut = new BinarySearch(array);
Assert.Equal(5, sut.Find(21));
}
public void BinarySearchTest()
{
for (int i = 0; i < 10; i++)
{
for (int j = 0; j < 100; j++)
{
int[] data = ArrayUtilities.CreateRandomArray(j, -100, 100);
Array.Sort(data);
for (int n = -100; n <= 100; n++)
{
int index = BinarySearch.Find(data, n);
if (index < 0)
{
Assert.IsTrue(Array.BinarySearch(data, n) < 0);
}
else
{
Assert.AreEqual(n, data[index]);
}
}
}
}
}
public void Finds_a_value_in_the_middle_of_an_array()
{
var array = new[] { 1, 3, 4, 6, 8, 9, 11 };
var sut = new BinarySearch(array);
Assert.Equal(3, sut.Find(6));
}
public void TestBinarySearchRetursnCorrectWhenValueNotFound()
{
var expected = -1;
var index = BinarySearch.Find(new int[] { 1, 2, 3, 4, 5, 6 }, 122);
Assert.AreEqual(expected, index);
}
public void Finds_a_value_in_the_middle_of_an_array()
{
var array = new[] { 1, 3, 4, 6, 8, 9, 11 };
var value = 6;
Assert.Equal(3, BinarySearch.Find(array, value));
}
public void Nothing_is_included_in_an_empty_array()
{
var array = new int[0];
var sut = new BinarySearch(array);
Assert.Equal(-1, sut.Find(1));
}
public void Finds_a_value_in_an_array_with_one_element()
{
var array = new[] { 6 };
var value = 6;
Assert.Equal(0, BinarySearch.Find(array, value));
}
public void Finds_a_value_in_an_array_of_odd_length()
{
var array = new[] { 1, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 634 };
var value = 144;
Assert.Equal(9, BinarySearch.Find(array, value));
}
public void Finds_a_value_in_an_array_of_even_length()
{
var array = new[] { 1, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377 };
var value = 21;
Assert.Equal(5, BinarySearch.Find(array, value));
}
public void Nothing_is_found_when_the_left_and_right_bounds_cross()
{
var array = new[] { 1, 2 };
var value = 0;
Assert.Equal(-1, BinarySearch.Find(array, value));
}
public void BinarySearchWorks_Hard()
{
int[] elements = { 6, 13, 14, 25, 33, 43, 51, 53, 64, 72, 84, 93, 95, 96, 97 };
int result = BinarySearch.Find(elements, 97);
Assert.Equal(result, 14);
}
public void BinarySearchNoElement()
{
int[] array = { 1, 3, 7, 11, 14, 15, 18 };
int result = BinarySearch <int> .Find(array, 2);
Assert.AreEqual(-1, result);
}
public void BinarySearchUsual()
{
int[] array = { 1, 3, 7, 11, 14, 15, 18 };
int result = BinarySearch <int> .Find(array, 15);
Assert.AreEqual(5, result);
}
public void Test_Correct_Input()
{
int[] array = new int[] { 4, 8, 13, 15, 19, 26, 29, 35, 39, 47, 58, 69 };
int actual = BinarySearch.Find(array, 8);
int expected = 1;
Assert.AreEqual(expected, actual);
}
static void Main(string[] args)
{
int[] storage = { 1, 3, 4, 8, 20, 50, 77, 100 };
int number = -500;
BinarySearch searchRoutine = new BinarySearch();
Console.WriteLine($"The index of the search numer {number} is {searchRoutine.Find(number, storage)}");
Console.ReadKey();
}
public void TestFind()
{
int[] array = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
BinarySearch <int> searcher = new BinarySearch <int>();
int idx = searcher.Find(array, 3);
Assert.AreEqual(idx, 2);
}
public void BinarySearch_Find_FindMiddle()
{
var search = new BinarySearch();
var list = new List <int>()
{
2, 4, 6
};
var result = search.Find(list, 4);
Assert.AreEqual(1, result.PositionFound);
list = new List <int>()
{
2, 4, 6, 8
};
result = search.Find(list, 6);
Assert.AreEqual(2, result.PositionFound);
}
private static void BinarySearchFunctionality()
{
var mass = new int[4] {
1, 2, 3, 4
};
const int num = 2;
var index = BinarySearch <int> .Find(mass, num, Comparer <int> .Default);
Console.WriteLine($"The element {num} has {index} index");
}
public void TestBinarySearch()
{
var array = new BinarySearchItem[]
{
new BinarySearchItem {
Id = 1
},
new BinarySearchItem {
Id = 3
},
new BinarySearchItem {
Id = 5
},
new BinarySearchItem {
Id = 7
},
new BinarySearchItem {
Id = 9
},
new BinarySearchItem {
Id = 11
},
new BinarySearchItem {
Id = 15
},
new BinarySearchItem {
Id = 21
},
new BinarySearchItem {
Id = 29
},
};
var binarySearch = new BinarySearch <BinarySearchItem>();
var result1 = binarySearch.Find(array, new BinarySearchItem {
Id = 21
});
var result2 = binarySearch.Find(array, new BinarySearchItem {
Id = 6
});
}
public void BinarySearch_Find_NoFind()
{
var search = new BinarySearch();
var list = new List <int>()
{
2, 4, 6
};
var result = search.Find(list, 5);
Assert.IsNull(result.PositionFound);
}
private int? ExecuteFind( int[] array, int value )
{
var searcher = new BinarySearch();
return searcher.Find(array, value);
}
