1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/JSON/stringify/value-number-non-finite.js b/js/src/tests/test262/built-ins/JSON/stringify/value-number-non-finite.js
new file mode 100644
index 0000000000..1109b956ea
--- /dev/null
+++ b/js/src/tests/test262/built-ins/JSON/stringify/value-number-non-finite.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2019 Aleksey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-serializejsonproperty
+description: >
+  Non-finite numbers as serialized as null.
+info: |
+  JSON.stringify ( value [ , replacer [ , space ] ] )
+
+  [...]
+  12. Return ? SerializeJSONProperty(the empty String, wrapper).
+
+  SerializeJSONProperty ( key, holder )
+
+  [...]
+  4. If Type(value) is Object, then
+    a. If value has a [[NumberData]] internal slot, then
+      i. Set value to ? ToNumber(value).
+  [...]
+  9. If Type(value) is Number, then
+    a. If value is finite, return ! ToString(value).
+    b. Return "null".
+---*/
+
+assert.sameValue(JSON.stringify(Infinity), 'null');
+assert.sameValue(JSON.stringify({key: -Infinity}), '{"key":null}');
+assert.sameValue(JSON.stringify([NaN]), '[null]');
+
+reportCompare(0, 0);