1 files changed, 57 insertions, 0 deletions
diff --git a/tests/test_fifo.py b/tests/test_fifo.py
new file mode 100644
index 0000000..933af56
--- /dev/null
+++ b/tests/test_fifo.py
@@ -0,0 +1,57 @@
+import unittest
+
+from cachetools import FIFOCache
+
+from . import CacheTestMixin
+
+
+class LRUCacheTest(unittest.TestCase, CacheTestMixin):
+
+    Cache = FIFOCache
+
+    def test_fifo(self):
+        cache = FIFOCache(maxsize=2)
+
+        cache[1] = 1
+        cache[2] = 2
+        cache[3] = 3
+
+        self.assertEqual(len(cache), 2)
+        self.assertEqual(cache[2], 2)
+        self.assertEqual(cache[3], 3)
+        self.assertNotIn(1, cache)
+
+        cache[2]
+        cache[4] = 4
+        self.assertEqual(len(cache), 2)
+        self.assertEqual(cache[3], 3)
+        self.assertEqual(cache[4], 4)
+        self.assertNotIn(2, cache)
+
+        cache[5] = 5
+        self.assertEqual(len(cache), 2)
+        self.assertEqual(cache[4], 4)
+        self.assertEqual(cache[5], 5)
+        self.assertNotIn(3, cache)
+
+    def test_fifo_getsizeof(self):
+        cache = FIFOCache(maxsize=3, getsizeof=lambda x: x)
+
+        cache[1] = 1
+        cache[2] = 2
+
+        self.assertEqual(len(cache), 2)
+        self.assertEqual(cache[1], 1)
+        self.assertEqual(cache[2], 2)
+
+        cache[3] = 3
+
+        self.assertEqual(len(cache), 1)
+        self.assertEqual(cache[3], 3)
+        self.assertNotIn(1, cache)
+        self.assertNotIn(2, cache)
+
+        with self.assertRaises(ValueError):
+            cache[4] = 4
+        self.assertEqual(len(cache), 1)
+        self.assertEqual(cache[3], 3)