ENGCOM-2281: 'Allowed Countries' - get countries for scope 'default'. #16693

 - Merge Pull Request #16693 from swnsma/magento2-1:Allowed-Countries-Get-Countries-For-Default-Scope
 - Merged commits:
   1. 72cb244
   2. e56cbde

Author: magento-engcom-team

app/code/Magento/Directory/Model/AllowedCountries.php

@@ -55,7 +55,7 @@ public function getAllowedCountries(
         $scope = ScopeInterface::SCOPE_WEBSITE,
         $scopeCode = null
     ) {
-        if (empty($scopeCode)) {
+        if ($scopeCode === null) {
             $scopeCode = $this->getDefaultScopeCode($scope);
         }
 

app/code/Magento/Directory/Test/Unit/Model/AllowedCountriesTest.php

@@ -70,4 +70,20 @@ public function testGetAllowedCountries()
             $this->allowedCountriesReader->getAllowedCountries(ScopeInterface::SCOPE_WEBSITE, true)
         );
     }
+
+    public function testGetAllowedCountriesDefaultScope()
+    {
+        $this->storeManagerMock->expects($this->never())
+            ->method('getStore');
+
+        $this->scopeConfigMock->expects($this->once())
+            ->method('getValue')
+            ->with(AllowedCountries::ALLOWED_COUNTRIES_PATH, ScopeInterface::SCOPE_STORE, 0)
+            ->willReturn('AM');
+
+        $this->assertEquals(
+            ['AM' => 'AM'],
+            $this->allowedCountriesReader->getAllowedCountries(ScopeInterface::SCOPE_STORE, 0)
+        );
+    }
 }