1 files changed, 68 insertions, 0 deletions
diff --git a/tests/basics/deque1.py b/tests/basics/deque1.py
new file mode 100644
index 000000000..19966fcb0
--- /dev/null
+++ b/tests/basics/deque1.py
@@ -0,0 +1,68 @@
+try:
+    try:
+        from ucollections import deque
+    except ImportError:
+        from collections import deque
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+
+d = deque((), 2)
+print(len(d))
+print(bool(d))
+
+try:
+    d.popleft()
+except IndexError:
+    print("IndexError")
+
+print(d.append(1))
+print(len(d))
+print(bool(d))
+print(d.popleft())
+print(len(d))
+
+d.append(2)
+print(d.popleft())
+
+d.append(3)
+d.append(4)
+print(len(d))
+print(d.popleft(), d.popleft())
+try:
+    d.popleft()
+except IndexError:
+    print("IndexError")
+
+d.append(5)
+d.append(6)
+d.append(7)
+print(len(d))
+print(d.popleft(), d.popleft())
+print(len(d))
+try:
+    d.popleft()
+except IndexError:
+    print("IndexError")
+
+# Case where get index wraps around when appending to full deque
+d = deque((), 2)
+d.append(1)
+d.append(2)
+d.append(3)
+d.append(4)
+d.append(5)
+print(d.popleft(), d.popleft())
+
+# Negative maxlen is not allowed
+try:
+    deque((), -1)
+except ValueError:
+    print("ValueError")
+
+# Unsupported unary op
+try:
+    ~d
+except TypeError:
+    print("TypeError")