Allow to override format* methods on service, fixes ember-intl#1684

addon/services/intl.js

@@ -64,22 +64,34 @@ export default class extends Service {
   }
 
   /** @public **/
-  formatRelative = createFormatterProxy('relative');
+  formatRelative(value, formatOptions) {
+    return this._format('relative', value, formatOptions);
+  }
 
   /** @public **/
-  formatMessage = createFormatterProxy('message');
+  formatMessage(value, formatOptions) {
+    return this._format('message', value, formatOptions);
+  }
 
   /** @public **/
-  formatNumber = createFormatterProxy('number');
+  formatNumber(value, formatOptions) {
+    return this._format('number', value, formatOptions);
+  }
 
   /** @public **/
-  formatTime = createFormatterProxy('time');
+  formatTime(value, formatOptions) {
+    return this._format('time', value, formatOptions);
+  }
 
   /** @public **/
-  formatDate = createFormatterProxy('date');
+  formatDate(value, formatOptions) {
+    return this._format('date', value, formatOptions);
+  }
 
   /** @public **/
-  formatList = createFormatterProxy('list');
+  formatList(value, formatOptions) {
+    return this._format('list', value, formatOptions);
+  }
 
   /** @private **/
   @tracked _locale = null;
@@ -346,10 +358,9 @@ export default class extends Service {
       this._ee.off('localeChanged', ...args);
     };
   }
-}
 
-function createFormatterProxy(name) {
-  return function serviceFormatterProxy(value, formatOptions) {
+  /** @private */
+  _format(name, value, formatOptions) {
     let locale;
     let intl;
     if (formatOptions && formatOptions.locale) {
@@ -365,5 +376,5 @@ function createFormatterProxy(name) {
     }
 
     return this._formatters[name].format(intl, value, formatOptions);
-  };
+  }
 }

package.json

@@ -135,6 +135,10 @@
   "engines": {
     "node": "14.* || >= 16"
   },
+  "volta": {
+    "node": "14.19.3",
+    "yarn": "1.22.11"
+  },
   "ember": {
     "edition": "octane"
   },
@@ -162,4 +166,4 @@
     "configPath": "tests/dummy/config",
     "demoURL": "https://ember-intl.github.io/ember-intl/"
   }
-}
+}

tests/unit/services/intl-test.ts

@@ -6,11 +6,12 @@ import { setupTest } from 'ember-qunit';
 import { get } from '@ember/object';
 import td from 'testdouble';
 import { setupIntl, TestContext } from 'ember-intl/test-support';
-import type { TOptions } from 'ember-intl/services/intl';
+import IntlService from 'ember-intl/services/intl';
+import { TOptions } from 'ember-intl/services/intl';
 import { next } from '@ember/runloop';
 const LOCALE = 'en-us';
 
-module('service:init initialization', function (hooks) {
+module('service:intl initialization', function (hooks) {
   setupTest(hooks);
 
   test('it calls `setLocale` on init', async function (this: TestContext, assert) {
@@ -26,6 +27,24 @@ module('service:init initialization', function (hooks) {
   });
 });
 
+module('service:intl inheritance', function (hooks) {
+  setupTest(hooks);
+
+  test('it calls overriden method', async function (this: TestContext, assert) {
+    assert.expect(2);
+
+    this.owner.register('service:intl', class extends IntlService {
+      formatNumber(value, options) {
+        assert.step('custom formatNumber')
+        return super.formatNumber(value, options);
+      }
+    })
+
+    this.owner.lookup('service:intl').formatNumber(1)
+    assert.verifySteps(['custom formatNumber'])
+  });
+});
+
 module('service:intl', function (hooks) {
   setupTest(hooks);
   setupIntl(hooks, LOCALE, {}, { missingMessage: false });