1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/resist-fingerprinting/locale.js b/js/src/jit-test/tests/resist-fingerprinting/locale.js
new file mode 100644
index 0000000000..6c15ca88ae
--- /dev/null
+++ b/js/src/jit-test/tests/resist-fingerprinting/locale.js
@@ -0,0 +1,19 @@
+// |jit-test| skip-if: typeof Intl === 'undefined'
+
+function test(locale, timeZone) {
+  let global = newGlobal({locale, forceUTC: true});
+
+  const constructors = ["Collator", "DateTimeFormat", "ListFormat",
+                        "NumberFormat", "PluralRules", "RelativeTimeFormat"];
+  for (const constructor of constructors) {
+    let intl = new global.Intl[constructor];
+    assertEq(intl.resolvedOptions().locale, locale);
+  }
+
+  const date = new global.Date(2012, 0, 10);
+  let tzRE = /\(([^\)]+)\)/;
+  assertEq(tzRE.exec(date)[1], timeZone)
+}
+
+test("de-CH", "Koordinierte Weltzeit");
+test("en", "Coordinated Universal Time");