diff --git a/exp/tests/test_geometry.py b/exp/tests/test_geometry.py
new file mode 100644
--- /dev/null
+++ b/exp/tests/test_geometry.py
@@ -0,0 +1,67 @@
+import math
+import random
+from unittest import TestCase
+
+from geometry import Line,EPoint
+
+random.seed(361)
+
+
+class TestLine(TestCase):
+	def testFromNormal(self):
+		p=Line.fromNormal(1,0,-1) # x-1=0
+		self.assertEqual(p._alpha,0)
+		self.assertEqual(p._d,1)
+
+		q=Line.fromNormal(1,1,-2) # x+y-2=0
+		self.assertAlmostEqual(q._alpha,math.pi/4)
+		self.assertAlmostEqual(q._d,math.sqrt(2))
+
+		r=Line.fromNormal(0,1,1) # y+1=0
+		self.assertAlmostEqual(r._alpha,math.pi*3/2)
+		self.assertEqual(r._d,1)
+
+	def testFromPoints(self):
+		ab=Line.fromPoints(EPoint(1,3),EPoint(1,-1))
+		self.assertEqual(ab._alpha,0)
+		self.assertEqual(ab._d,1)
+
+		cd=Line.fromPoints(EPoint(0,2),EPoint(-1,3))
+		self.assertAlmostEqual(cd._alpha,math.pi/4)
+		self.assertAlmostEqual(cd._d,math.sqrt(2))
+
+		ef=Line.fromPoints(EPoint(-2,-1),EPoint(-4,-1))
+		self.assertAlmostEqual(ef._alpha,math.pi*3/2)
+		self.assertEqual(ef._d,1)
+
+	def testIntersect(self):
+		for i in range(10):
+			a=EPoint(random.randint(-100,100),random.randint(-100,100))
+			b=EPoint(random.randint(-100,100),random.randint(-100,100))
+			c=EPoint(random.randint(-100,100),random.randint(-100,100))
+			ab=Line.fromPoints(a,b)
+			ac=Line.fromPoints(a,c)
+			a_=ab.intersect(ac)
+			self.assertAlmostEqual(a.x,a_.x)
+			self.assertAlmostEqual(a.y,a_.y)
+
+	def testDistanceTo(self):
+		p=Line(0,1)
+		q=Line(math.pi/4,math.sqrt(2))
+		r=Line(math.pi*3/2,1)
+
+		a=EPoint(0,0)
+		b=EPoint(1,0)
+		c=EPoint(-1,-1)
+
+		self.assertAlmostEqual(p.distanceTo(a),1)
+		self.assertAlmostEqual(p.distanceTo(b),0)
+		self.assertAlmostEqual(p.distanceTo(c),2)
+
+		self.assertAlmostEqual(q.distanceTo(a),math.sqrt(2))
+		self.assertAlmostEqual(q.distanceTo(b),math.sqrt(2)/2)
+		self.assertAlmostEqual(q.distanceTo(c),2*math.sqrt(2))
+
+		self.assertAlmostEqual(r.distanceTo(a),1)
+		self.assertAlmostEqual(r.distanceTo(b),1)
+		self.assertAlmostEqual(r.distanceTo(c),0)