diff --git a/classes.py b/classes.py
index 3ebca7a..212b6f4 100644
--- a/classes.py
+++ b/classes.py
@@ -1,6 +1,9 @@
 # Une classe sert à stocker des attributs ensemble.
 from dataclasses import dataclass
 from statistics import mean
+from matplotlib import pyplot as plt
+import datetime as dt
+from random import randint
 
 
 @dataclass
@@ -9,7 +12,7 @@ class Point:
     y: float
 
 
-from random import randint
+origin = Point(0, 0)  # origin.x = 0, origin.y = 0
 
 
 class Dice:
@@ -38,39 +41,18 @@ class DiceCup:
         return mean([dice.value for dice in self.dices])
 
 
-cup = DiceCup([Dice() for _ in range(1000)])
-results = {}
-for i in range(10000):
-    cup.shake()
-    try:
-        results[cup.total()] = results[cup.total()] + 1
-    except KeyError:
-        results[cup.total()] = 1
+def show_graph():
+    cup = DiceCup([Dice() for _ in range(1000)])
+    results = {}
+    for i in range(10000):
+        cup.shake()
+        try:
+            results[cup.total()] = results[cup.total()] + 1
+        except KeyError:
+            results[cup.total()] = 1
 
-from matplotlib import pyplot as plt
-
-plt.scatter(results.keys(), results.values())
-plt.show()
-
-
-class Point:
-    def __init__(self, x, y):  # Dunder init "Double underscore init"
-        self.x = x
-        self.y = y
-
-    def __repr__(self):
-        return f"Point(x={self.x}, y={self.y})"
-
-    def dist_from_origin(self):
-        return (self.x**2 + self.y**2) ** 0.5
-
-    def dist(self, other):
-        """Compute distance between two points."""
-        return ((self.x - other.x) ** 2 + (self.y - other.y) ** 2) ** 0.5
-
-
-origin = Point(0, 0)  # origin.x = 0, origin.y = 0
-print(origin)
+    plt.scatter(results.keys(), results.values())
+    plt.show()
 
 
 def dist_from_origin(x, y):
@@ -103,9 +85,6 @@ def dist(p1, p2):
     return ((p1.x - p2.x) ** 2 + (p1.y - p2.y) ** 2) ** 0.5
 
 
-import datetime as dt
-
-
 @dataclass
 class Recette:
     nom: str
diff --git a/point.py b/point.py
new file mode 100644
index 0000000..014480d
--- /dev/null
+++ b/point.py
@@ -0,0 +1,14 @@
+class Point:
+    def __init__(self, x, y):  # Dunder init "Double underscore init"
+        self.x = x
+        self.y = y
+
+    def __repr__(self):
+        return f"Point(x={self.x}, y={self.y})"
+
+    def dist_from_origin(self):
+        return (self.x**2 + self.y**2) ** 0.5
+
+    def dist(self, other):
+        """Compute distance between two points."""
+        return ((self.x - other.x) ** 2 + (self.y - other.y) ** 2) ** 0.5
diff --git a/tests/test_point.py b/tests/test_point.py
new file mode 100644
index 0000000..a2769cd
--- /dev/null
+++ b/tests/test_point.py
@@ -0,0 +1,32 @@
+from math import isclose
+
+from hypothesis import given
+from hypothesis.strategies import floats
+
+from point import Point
+
+
+def test_origin_is_at_zero():
+    origin = Point(0, 0)
+    assert origin.dist_from_origin() == 0
+
+
+bound = 2**128
+
+
+@given(floats(allow_nan=False, min_value=-bound, max_value=bound))
+def test_not_origin_is_not_at_zero(x):
+    if isclose(x, 0, abs_tol=0.001):
+        return
+    not_origin = Point(x, 0)
+    assert not_origin.dist_from_origin() > 0
+
+
+@given(
+    floats(allow_nan=False, min_value=-bound, max_value=bound),
+    floats(allow_nan=False, min_value=-bound, max_value=bound),
+)
+def test_dist(x, y):
+    origin = Point(0, 0)
+    p1 = Point(x, y)
+    assert origin.dist(p1) == p1.dist(origin)