[User] Refactor and Unit Test Coverage for class \Magento\User\Model\Backend\Config\ObserverConfig

Author: edenduong

app/code/Magento/User/Test/Unit/Model/Backend/Config/ObserverConfigTest.php

@@ -63,6 +63,28 @@ protected function setUp()
         );
     }
 
+    /**
+     * Test when admin password lifetime = 0 days
+     */
+    public function testIsLatestPasswordExpiredWhenNoAdminLifeTime()
+    {
+        $this->backendConfigMock->expects(self::any())->method('getValue')
+            ->with(self::XML_ADMIN_SECURITY_PASSWORD_LIFETIME)
+            ->willReturn('0');
+        $this->assertEquals(false, $this->model->_isLatestPasswordExpired([]));
+    }
+
+    /**
+     * Test when admin password lifetime = 2 days
+     */
+    public function testIsLatestPasswordExpiredWhenHasAdminLifeTime()
+    {
+        $this->backendConfigMock->expects(self::any())->method('getValue')
+            ->with(self::XML_ADMIN_SECURITY_PASSWORD_LIFETIME)
+            ->willReturn('2');
+        $this->assertEquals(true, $this->model->_isLatestPasswordExpired(['last_updated' => 1571428052]));
+    }
+
     /**
      * Test when security lockout threshold = 100 minutes
      */