From f0a317cc511a4a7b04a701c32881d1e3331f3711 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Thu, 16 May 2019 21:57:56 +0800
Subject: Change roles in UserInfo into isadmin.

---
 Timeline.Tests/Helpers/UserInfoComparers.cs | 49 +++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Timeline.Tests/Helpers/UserInfoComparers.cs

(limited to 'Timeline.Tests/Helpers/UserInfoComparers.cs')

diff --git a/Timeline.Tests/Helpers/UserInfoComparers.cs b/Timeline.Tests/Helpers/UserInfoComparers.cs
new file mode 100644
index 00000000..d88b6622
--- /dev/null
+++ b/Timeline.Tests/Helpers/UserInfoComparers.cs
@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Timeline.Entities;
+
+namespace Timeline.Tests.Helpers
+{
+    public static class UserInfoComparers
+    {
+        public static IEqualityComparer<UserInfo> EqualityComparer { get; } = new EqualityComparerImpl();
+        public static IComparer<UserInfo> Comparer { get; } = Comparer<UserInfo>.Create(Compare);
+
+
+        private class EqualityComparerImpl : IEqualityComparer<UserInfo>
+        {
+            bool IEqualityComparer<UserInfo>.Equals(UserInfo x, UserInfo y)
+            {
+                return Compare(x, y) == 0;
+            }
+
+            int IEqualityComparer<UserInfo>.GetHashCode(UserInfo obj)
+            {
+                return obj.Username.GetHashCode() ^ obj.IsAdmin.GetHashCode();
+            }
+        }
+
+        public static int Compare(UserInfo left, UserInfo right)
+        {
+            if (left == null)
+            {
+                if (right == null)
+                    return 0;
+                return -1;
+            }
+
+            if (right == null)
+                return 1;
+
+            var uc = string.Compare(left.Username, right.Username);
+            if (uc != 0)
+                return uc;
+
+            if (left.IsAdmin == right.IsAdmin)
+                return 0;
+
+            return left.IsAdmin ? -1 : 1;
+        }
+    }
+}
-- 
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