From 58dda0b23e09a9b8a03ac9528fc6eb5908c7bf9e Mon Sep 17 00:00:00 2001
From: Jin Qiao <jinqiao@neo.org>
Date: Mon, 27 Apr 2020 14:12:56 +0800
Subject: [PATCH] Remove ProtocolSettings Initialize

---
 src/neo/ProtocolSettings.cs                | 28 +-------
 tests/neo.UnitTests/UT_ProtocolSettings.cs | 78 ----------------------
 2 files changed, 1 insertion(+), 105 deletions(-)

diff --git a/src/neo/ProtocolSettings.cs b/src/neo/ProtocolSettings.cs
index ca6deaf96e..08cf86392b 100644
--- a/src/neo/ProtocolSettings.cs
+++ b/src/neo/ProtocolSettings.cs
@@ -1,7 +1,6 @@
 using Microsoft.Extensions.Configuration;
 using System;
 using System.Linq;
-using System.Threading;
 
 namespace Neo
 {
@@ -15,32 +14,7 @@ public class ProtocolSettings
         public uint MillisecondsPerBlock { get; }
         public int MemoryPoolMaxTransactions { get; }
 
-        static ProtocolSettings _default;
-
-        static bool UpdateDefault(IConfiguration configuration)
-        {
-            var settings = new ProtocolSettings(configuration.GetSection("ProtocolConfiguration"));
-            return null == Interlocked.CompareExchange(ref _default, settings, null);
-        }
-
-        public static bool Initialize(IConfiguration configuration)
-        {
-            return UpdateDefault(configuration);
-        }
-
-        public static ProtocolSettings Default
-        {
-            get
-            {
-                if (_default == null)
-                {
-                    var configuration = Utility.LoadConfig("protocol");
-                    UpdateDefault(configuration);
-                }
-
-                return _default;
-            }
-        }
+        public static readonly ProtocolSettings Default = new ProtocolSettings(Utility.LoadConfig("protocol").GetSection("ProtocolConfiguration"));
 
         private ProtocolSettings(IConfigurationSection section)
         {
diff --git a/tests/neo.UnitTests/UT_ProtocolSettings.cs b/tests/neo.UnitTests/UT_ProtocolSettings.cs
index e1a9e91cbb..214e9bbaca 100644
--- a/tests/neo.UnitTests/UT_ProtocolSettings.cs
+++ b/tests/neo.UnitTests/UT_ProtocolSettings.cs
@@ -1,36 +1,12 @@
 using FluentAssertions;
-using Microsoft.Extensions.Configuration;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using Neo.Wallets;
-using System.Collections.Generic;
-using System.Reflection;
 
 namespace Neo.UnitTests
 {
     [TestClass]
     public class UT_ProtocolSettings
     {
-        // since ProtocolSettings.Default is designed to be writable only once, use reflection to 
-        // reset the underlying _default field to null before and after running tests in this class.
-        static void ResetProtocolSettings()
-        {
-            var defaultField = typeof(ProtocolSettings)
-                .GetField("_default", BindingFlags.Static | BindingFlags.NonPublic);
-            defaultField.SetValue(null, null);
-        }
-
-        [TestInitialize]
-        public void Initialize()
-        {
-            ResetProtocolSettings();
-        }
-
-        [TestCleanup]
-        public void Cleanup()
-        {
-            ResetProtocolSettings();
-        }
-
         [TestMethod]
         public void CheckFirstLetterOfAddresses()
         {
@@ -47,60 +23,6 @@ public void Default_Magic_should_be_mainnet_Magic_value()
             ProtocolSettings.Default.Magic.Should().Be(mainNetMagic);
         }
 
-        [TestMethod]
-        public void Can_initialize_ProtocolSettings()
-        {
-            var expectedMagic = 12345u;
-
-            var dict = new Dictionary<string, string>()
-            {
-                { "ProtocolConfiguration:Magic", $"{expectedMagic}" }
-            };
-
-            var config = new ConfigurationBuilder().AddInMemoryCollection(dict).Build();
-            ProtocolSettings.Initialize(config).Should().BeTrue();
-            ProtocolSettings.Default.Magic.Should().Be(expectedMagic);
-        }
-
-        [TestMethod]
-        public void Cant_initialize_ProtocolSettings_after_default_settings_used()
-        {
-            var mainNetMagic = 0x4F454Eu;
-            ProtocolSettings.Default.Magic.Should().Be(mainNetMagic);
-
-            var updatedMagic = 54321u;
-            var dict = new Dictionary<string, string>()
-            {
-                { "ProtocolConfiguration:Magic", $"{updatedMagic}" }
-            };
-
-            var config = new ConfigurationBuilder().AddInMemoryCollection(dict).Build();
-            ProtocolSettings.Initialize(config).Should().BeFalse();
-            ProtocolSettings.Default.Magic.Should().Be(mainNetMagic);
-        }
-
-        [TestMethod]
-        public void Cant_initialize_ProtocolSettings_twice()
-        {
-            var expectedMagic = 12345u;
-            var dict = new Dictionary<string, string>()
-            {
-                { "ProtocolConfiguration:Magic", $"{expectedMagic}" }
-            };
-
-            var config = new ConfigurationBuilder().AddInMemoryCollection(dict).Build();
-            ProtocolSettings.Initialize(config).Should().BeTrue();
-
-            var updatedMagic = 54321u;
-            dict = new Dictionary<string, string>()
-            {
-                { "ProtocolConfiguration:Magic", $"{updatedMagic}" }
-            };
-            config = new ConfigurationBuilder().AddInMemoryCollection(dict).Build();
-            ProtocolSettings.Initialize(config).Should().BeFalse();
-            ProtocolSettings.Default.Magic.Should().Be(expectedMagic);
-        }
-
         [TestMethod]
         public void TestGetMemoryPoolMaxTransactions()
         {