diff --git a/test_graph_count.py b/test_graph_count.py
index 432d1ea..1b9e2ab 100644
--- a/test_graph_count.py
+++ b/test_graph_count.py
@@ -1,8 +1,78 @@
 import unittest
+import numpy as np
+from pathlib import Path
+from graph_count import biedge_count_per_dimension
+
+from graph_count import temporary_file_name
+
+
+class TestRepeatCounts(unittest.TestCase):
+    def test_1_biedge_in_simplex(self):
+        simplex3 = np.ones((4, 4), dtype=int) - np.diag(np.ones(4), dtype=int)
+        simplex3[3, 2] = 1
+        self.assertEqual(
+            biedge_count_per_dimension(simplex3),
+            {1: 2, 2: 4, 3: 2}
+        )
+
+        simplex4 = np.ones((4, 4), dtype=int) - np.diag(np.ones(4), dtype=int)
+        simplex4[4, 3] = 1
+        self.assertEqual(
+            biedge_count_per_dimension(simplex4),
+            {1: 2, 2: 6, 3: 4, 4: 2}
+        )
+
+    def test_2_biedge_in_simplex(self):
+        simplex3 = np.ones((4, 4), dtype=int) - np.diag(np.ones(4), dtype=int)
+        simplex3[3, 2] = 1
+        simplex3[2, 1] = 1
+        self.assertEqual(
+            biedge_count_per_dimension(simplex3),
+            {1: 4, 2: 10, 3: 6}
+        )
+
+
+class TestNoRepeatCounts(unittest.TestCase):
+    def test_1_biedge_in_simplex(self):
+        simplex3 = np.ones((4, 4), dtype=int) - np.diag(np.ones(4), dtype=int)
+        simplex3[3, 2] = 1
+        self.assertEqual(
+            biedge_count_per_dimension(simplex3),
+            {3: 1}
+        )
+
+    def test_2_biedge_in_simplex(self):
+        simplex3 = np.ones((4, 4), dtype=int) - np.diag(np.ones(4), dtype=int)
+        simplex3[3, 2] = 1
+        simplex3[2, 1] = 1
+        self.assertEqual(
+            biedge_count_per_dimension(simplex3),
+            {1: 4, 2: 10, 3: 6}
+        )
+
+
+class TestBooleanMatrix(unittest.TestCase):
+    def test_bool_int(self):
+        simplex3int = np.ones((4, 4), dtype=int) - np.diag(np.ones(4), dtype=int)
+        simplex3bool = np.ones((4, 4), dtype=bool).multiply(np.logical_not(np.diag(np.ones(4), dtype=bool)))
+        self.assertEqual(
+            biedge_count_per_dimension(simplex3int),
+            biedge_count_per_dimension(simplex3bool)
+        )
+
+
+class TestDoesNotOverride(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        Path(temporary_file_name + "1.binary").touch()
+
+    @classmethod
+    def tearDownClass(cls):
+        Path(temporary_file_name + "1.binary").unlink()
+
+    def test_no_override(self):
+        self.assertRaises(FileExistsError, biedge_count_per_dimension, np.ones((4, 4)))
 
-class MyTestCase(unittest.TestCase):
-    def test_something(self):
-        self.assertEqual(True, False)
 
 if __name__ == '__main__':
     unittest.main()