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using System.Reflection;
using NUnit.Framework;

namespace XenAdminTests.UnitTests.UnitTestHelper
{
    class VerifyGetters : IUnitTestVerifier
    {
        private readonly object classToVerify = null;

        /// <param name="classToVerify">A class with getters and setters to verify</param>
        public VerifyGetters(object classToVerify)
        {
            this.classToVerify = classToVerify;
        }

        /// <summary>
        /// Use this when you want to test that some expected data has already been set in a class
        /// </summary>
        /// <example>
        /// </example>
        /// <param name="expected">A struct of expected data content with members having the same name and return type as the getters and setters of the class</param>
        public void Verify(object expected)
        {
            FieldInfo[] fields = expected.GetType().GetFields();
            foreach (FieldInfo fieldInfo in fields)
            {
                string fieldName = fieldInfo.Name;
                object expectedValue = fieldInfo.GetValue(expected);
                PropertyInfo getter = classToVerify.GetType().GetProperty(fieldName);

                object actualValue = getter.GetValue(classToVerify, null);
                if (expectedValue is string)
                    actualValue = actualValue.ToString();

                Assert.AreEqual(expectedValue, actualValue, "Property mismatched: " + fieldName);
            }
        }
    }
}