Tests for odd_even_transposition_parallel (#10926)

* [ADD] tests for odd_even_transposition_parallel

* adding another test because build failed 6 hrs

* comment out all tests to see if it fails

* list(range(10)[::-1]) test uncommented

* [a, x, c] test uncommented

* [1.9, 42.0, 2.8] test uncommented

* [False, True, False] test uncommented

* [1, 32.0, 9] test uncommented

* [1, 32.0, 9] test uncommented

* [-442, -98, -554, 266, -491, 985, -53, -529, 82, -429] test uncommented

* test non global lock

* [DEL] Testing multiple data types. Couldn't get doctest to work

* [ADD] Comment on why non global process lock

Author: RaymondDashWu

sorts/odd_even_transposition_parallel.py

@@ -13,7 +13,8 @@
 from multiprocessing import Lock, Pipe, Process
 
 # lock used to ensure that two processes do not access a pipe at the same time
-process_lock = Lock()
+# NOTE This breaks testing on build runner. May work better locally
+# process_lock = Lock()
 
 """
 The function run by the processes that sorts the list
@@ -28,7 +29,7 @@
 
 
 def oe_process(position, value, l_send, r_send, lr_cv, rr_cv, result_pipe):
-    global process_lock
+    process_lock = Lock()
 
     # we perform n swaps since after n swaps we know we are sorted
     # we *could* stop early if we are sorted already, but it takes as long to
@@ -72,6 +73,26 @@ def oe_process(position, value, l_send, r_send, lr_cv, rr_cv, result_pipe):
 
 
 def odd_even_transposition(arr):
+    """
+    >>> odd_even_transposition(list(range(10)[::-1])) == sorted(list(range(10)[::-1]))
+    True
+    >>> odd_even_transposition(["a", "x", "c"]) == sorted(["x", "a", "c"])
+    True
+    >>> odd_even_transposition([1.9, 42.0, 2.8]) == sorted([1.9, 42.0, 2.8])
+    True
+    >>> odd_even_transposition([False, True, False]) == sorted([False, False, True])
+    True
+    >>> odd_even_transposition([1, 32.0, 9]) == sorted([False, False, True])
+    False
+    >>> odd_even_transposition([1, 32.0, 9]) == sorted([1.0, 32, 9.0])
+    True
+    >>> unsorted_list = [-442, -98, -554, 266, -491, 985, -53, -529, 82, -429]
+    >>> odd_even_transposition(unsorted_list) == sorted(unsorted_list)
+    True
+    >>> unsorted_list = [-442, -98, -554, 266, -491, 985, -53, -529, 82, -429]
+    >>> odd_even_transposition(unsorted_list) == sorted(unsorted_list + [1])
+    False
+    """
     process_array_ = []
     result_pipe = []
     # initialize the list of pipes where the values will be retrieved