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gaia/shared/test/unit/mocks/mock_intl_helper.js

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+(function(global) {
+'use strict';
+/* global mozIntl */
+
+const helperCache = new Map();
+
+global.MockIntlHelper = {
+  define: function(name, type, options) {
+    helperCache.set(name, {options, type});
+  },
+  get: function(name) {
+    if (!helperCache.has(name)) {
+      throw new Error('Intl Object with name "' + name + '" is not defined');
+    }
+    var formatter = helperCache.get(name);
+    switch (formatter.type) {
+      case 'number':
+        return Intl.NumberFormat(navigator.languages, formatter.options);
+      case 'datetime':
+        return Intl.DateTimeFormat(navigator.languages, formatter.options);
+      case 'mozdatetime':
+        return mozIntl.DateTimeFormat(navigator.languages, formatter.options);
+      case 'mozduration':
+        return mozIntl.DurationFormat(navigator.languages, formatter.options);
+    }
+  },
+  observe: function() {},
+  unobserve: function() {},
+};
+
+}(this));