1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/NumberFormat/prototype/format/format-rounding-priority-auto.js b/js/src/tests/test262/intl402/NumberFormat/prototype/format/format-rounding-priority-auto.js
new file mode 100644
index 0000000000..2199dd6b53
--- /dev/null
+++ b/js/src/tests/test262/intl402/NumberFormat/prototype/format/format-rounding-priority-auto.js
@@ -0,0 +1,49 @@
+// Copyright 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-intl.numberformat.prototype.format
+description: >
+  When roungingPriority is "auto", the constraint on significant digits is
+  preferred over the constraint on fraction digits
+features: [Intl.NumberFormat-v3]
+includes: [testIntl.js]
+---*/
+
+var locales = [
+  new Intl.NumberFormat().resolvedOptions().locale, 'ar', 'de', 'th', 'ja'
+];
+var numberingSystems = ['arab', 'latn', 'thai', 'hanidec'];
+
+// minimumSignificantDigits is less precise
+testNumberFormat(
+  locales,
+  numberingSystems,
+  {useGrouping: false, roundingPriority: 'auto', minimumSignificantDigits: 2, minimumFractionDigitsDigits: 2},
+  {'1': '1.0'}
+);
+
+// minimumSignificantDigits is more precise
+testNumberFormat(
+  locales,
+  numberingSystems,
+  {useGrouping: false, roundingPriority: 'auto', minimumSignificantDigits: 3, minimumFractionDigitsDigits: 2},
+  {'1': '1.00'}
+);
+
+// maximumSignificantDigits is less precise
+testNumberFormat(
+  locales,
+  numberingSystems,
+  {useGrouping: false, roundingPriority: 'auto', maximumSignificantDigits: 2, maximumFractionDigitsDigits: 2},
+  {'1.23': '1.2'}
+);
+
+// maximumSignificantDigits is more precise
+testNumberFormat(
+  locales,
+  numberingSystems,
+  {useGrouping: false, roundingPriority: 'auto', maximumSignificantDigits: 3, maximumFractionDigitsDigits: 1},
+  {'1.234': '1.23'}
+);
+
+reportCompare(0, 0);