decode done(?)

tests/test_reimplement_set.py

@@ -0,0 +1,21 @@
+import unittest
+
+from reimplement.set import downsample_set
+
+
+class DownsampleSetTest(unittest.TestCase):
+    def test_masks_high_half_and_keeps_sorted_unique_values(self):
+        self.assertEqual(downsample_set([1, 3, 6, 8, 10, 14], 3), [0, 1, 2, 3, 6])
+
+    def test_removes_duplicates_created_by_masking(self):
+        self.assertEqual(downsample_set([1, 6, 14], 3), [1, 6])
+
+    def test_keeps_low_only_set_unchanged(self):
+        self.assertEqual(downsample_set([1, 3, 6], 3), [1, 3, 6])
+
+    def test_masks_high_only_set(self):
+        self.assertEqual(downsample_set([8, 10, 14], 3), [0, 2, 6])
+
+
+if __name__ == "__main__":
+    unittest.main()