Add new test for bucket sort algorithm in sorts/bucket_sort.py (#11605)

* Add new test for bucket sort algorithm in sorts/bucket_sort.py

* Update fractional_knapsack.py

* Update matrix_class.py

* Update bucket_sort.py

* Update bucket_sort.py

---------

Co-authored-by: Maxim Smolskiy <mithridatus@mail.ru>

sorts/bucket_sort.py

@@ -51,12 +51,35 @@ def bucket_sort(my_list: list, bucket_count: int = 10) -> list:
     >>> collection = random.sample(range(-50, 50), 50)
     >>> bucket_sort(collection) == sorted(collection)
     True
+    >>> data = [1, 2, 2, 1, 1, 3]
+    >>> bucket_sort(data) == sorted(data)
+    True
+    >>> data = [5, 5, 5, 5, 5]
+    >>> bucket_sort(data) == sorted(data)
+    True
+    >>> data = [1000, -1000, 500, -500, 0]
+    >>> bucket_sort(data) == sorted(data)
+    True
+    >>> data = [5.5, 2.2, -1.1, 3.3, 0.0]
+    >>> bucket_sort(data) == sorted(data)
+    True
+    >>> bucket_sort([1]) == [1]
+    True
+    >>> data = [-1.1, -1.5, -3.4, 2.5, 3.6, -3.3]
+    >>> bucket_sort(data) == sorted(data)
+    True
+    >>> data = [9, 2, 7, 1, 5]
+    >>> bucket_sort(data) == sorted(data)
+    True
     """
 
     if len(my_list) == 0 or bucket_count <= 0:
         return []
 
     min_value, max_value = min(my_list), max(my_list)
+    if min_value == max_value:
+        return my_list
+
     bucket_size = (max_value - min_value) / bucket_count
     buckets: list[list] = [[] for _ in range(bucket_count)]
 
@@ -73,3 +96,6 @@ if __name__ == "__main__":
     testmod()
     assert bucket_sort([4, 5, 3, 2, 1]) == [1, 2, 3, 4, 5]
     assert bucket_sort([0, 1, -10, 15, 2, -2]) == [-10, -2, 0, 1, 2, 15]
+    assert bucket_sort([1.1, 1.2, -1.2, 0, 2.4]) == [-1.2, 0, 1.1, 1.2, 2.4]
+    assert bucket_sort([5, 5, 5, 5, 5]) == [5, 5, 5, 5, 5]
+    assert bucket_sort([-5, -1, -6, -2]) == [-6, -5, -2, -1]