1 files changed, 30 insertions, 0 deletions
diff --git a/tests/extmod/ujson_dump.py b/tests/extmod/ujson_dump.py
new file mode 100644
index 000000000..b1cb4a9cb
--- /dev/null
+++ b/tests/extmod/ujson_dump.py
@@ -0,0 +1,30 @@
+try:
+    from uio import StringIO
+    import ujson as json
+except:
+    try:
+        from io import StringIO
+        import json
+    except ImportError:
+        print("SKIP")
+        raise SystemExit
+
+s = StringIO()
+json.dump(False, s)
+print(s.getvalue())
+
+s = StringIO()
+json.dump({"a": (2, [3, None])}, s)
+print(s.getvalue())
+
+# dump to a small-int not allowed
+try:
+    json.dump(123, 1)
+except (AttributeError, OSError): # CPython and uPy have different errors
+    print('Exception')
+
+# dump to an object not allowed
+try:
+    json.dump(123, {})
+except (AttributeError, OSError): # CPython and uPy have different errors
+    print('Exception')