From e0334d3c0f8f333232fc69442fadb3e9f4701fe3 Mon Sep 17 00:00:00 2001
From: Bertrand Benjamin <benjamin.bertrand@opytex.org>
Date: Mon, 7 Jan 2019 09:24:19 +0100
Subject: [PATCH] Test(core): doctest reject_random and filter_random

---
 mapytex/calculus/core/random.py | 59 ++++++++++++++++++++++++++++++---
 1 file changed, 54 insertions(+), 5 deletions(-)

diff --git a/mapytex/calculus/core/random.py b/mapytex/calculus/core/random.py
index 431518b..b4187cb 100644
--- a/mapytex/calculus/core/random.py
+++ b/mapytex/calculus/core/random.py
@@ -10,7 +10,7 @@
 Function to create random things
 
 """
-from random import randint, choice
+import random
 
 __all__ = ["reject_random", "filter_random", "FilterRandom"]
 
@@ -27,12 +27,37 @@ def reject_random(min_value = -10,
         :param rejected: rejected values
         :param accept_callbacks: list of function for value rejection
 
+        :example:
+        >>> a = reject_random()
+        >>> a not in [0, 1]
+        True
+        >>> a >= -10
+        True
+        >>> a <= 10
+        True
+        >>> a = reject_random(min_value=3, max_value=11, rejected=[5, 7])
+        >>> a not in [5, 7]
+        True
+        >>> a >= 3
+        True
+        >>> a <= 11
+        True
+        >>> a = reject_random(accept_callbacks=[lambda x: x%2])
+        >>> a%2
+        1
+        >>> random.seed(0)
+        >>> reject_random()
+        2
+        >>> random.seed(1)
+        >>> reject_random()
+        -6
+
     """
     conditions = [lambda x: x not in rejected] + accept_callbacks
 
-    candidate = randint(min_value, max_value)
+    candidate = random.randint(min_value, max_value)
     while not all(c(candidate) for c in conditions):
-        candidate = randint(min_value, max_value)
+        candidate = random.randint(min_value, max_value)
 
     return candidate
 
@@ -49,6 +74,30 @@ def filter_random(min_value = -10,
         :param rejected: rejected values
         :param accept_callbacks: list of function for value rejection
 
+        :example:
+        >>> a = filter_random()
+        >>> a not in [0, 1]
+        True
+        >>> a >= -10
+        True
+        >>> a <= 10
+        True
+        >>> a = filter_random(min_value=3, max_value=11, rejected=[5, 7])
+        >>> a not in [5, 7]
+        True
+        >>> a >= 3
+        True
+        >>> a <= 11
+        True
+        >>> a = filter_random(accept_callbacks=[lambda x: x%2])
+        >>> a%2
+        1
+        >>> random.seed(0)
+        >>> filter_random()
+        -7
+        >>> random.seed(1)
+        >>> filter_random()
+        6
     """
     candidates = set(range(min_value, max_value+1))
     candidates = {c for c in candidates if c not in rejected}
@@ -58,7 +107,7 @@ def filter_random(min_value = -10,
 
     if len(candidates) == 0:
         raise OverflowError("There is no candidates for this range and those conditions")
-    return choice(candidates)
+    return random.choice(candidates)
 
 class FilterRandom(object):
 
@@ -110,7 +159,7 @@ class FilterRandom(object):
     def __call__(self, min_value=-10, max_value=10):
         """ Randomly choose on candidate """
         self.add_candidates(min_value, max_value)
-        return choice(self.candidates(min_value, max_value))
+        return random.choice(self.candidates(min_value, max_value))
 
 
 # -----------------------------