Improve test

Author: gjbex

source-code/testing/Hypothesis/points.py

@@ -46,9 +46,11 @@ def test_distance():
     assert math.isclose(p1.distance(p2), 5.0)
 
 
-@given(x1=st.floats(), y1=st.floats(), x2=st.floats(), y2=st.floats(), x=st.floats(), y=st.floats())
-def test_is_on_line(x1: float, y1: float, x2: float, y2: float, x: float, y: float):
+@given(x1=st.floats(), y1=st.floats(), x2=st.floats(), y2=st.floats())
+def test_is_on_line(x1: float, y1: float, x2: float, y2: float):
     p1 = Point(x1, y1)
     p2 = Point(x2, y2)
-    p = Point(x, y)
+    p = Point((x1 + x2)/2, (y1 + y2)/2)
     assert p.is_on_line(p1, p2)
+    assert p1.is_on_line(p1, p2)
+    assert p2.is_on_line(p1, p2)