fix unit test dotnet yml

.github/workflows/dotnet.yml

@@ -12,11 +12,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v2
     - name: Setup .NET
-      uses: actions/setup-dotnet@v3
+      uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 6.0.x
+        dotnet-version: 5.0.x
     - name: Restore dependencies
       run: dotnet restore
     - name: Build

README.md

@@ -17,6 +17,7 @@
 <div align="center">
  Your <a href="https://github.com/shps951023/MiniExcel">Star</a> and <a href="https://miniexcel.github.io">Donate</a> can make MiniExcel better 
 </div>
+
 ---
 
 ### Introduction

tests/MiniExcelTests/PerformanceEnhancementTest.cs

@@ -1,84 +0,0 @@
-using CsvHelper;
-using MiniExcelLibs.Tests.Utils;
-using System;
-using System.Collections.Generic;
-using System.Data;
-using System.Diagnostics;
-using System.Globalization;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Xunit;
-
-namespace MiniExcelLibs.Tests
-{
-    public class PerformanceEnhancementTest
-    {
-        [Fact]
-        public void StartsWithPerformanceCompare()
-        {
-            string stringVal = "@@@fileid@@@,tteffadasdas ", findVal = "@@@fileid@@@,";
-            const int LOOP = 5000000;
-            int runTimes = 0;
-            long normalMilliseconds = 0;
-            long ordinalMilliseconds = 0;
-
-            Stopwatch watch = Stopwatch.StartNew();
-            for (int i = 0; i < LOOP; i++)
-            {
-                if (stringVal.StartsWith(findVal)) 
-                    runTimes++;
-            }
-            watch.Stop();
-            normalMilliseconds = watch.ElapsedMilliseconds;
-            Assert.Equal(LOOP, runTimes);
-
-            runTimes = 0;
-            watch = Stopwatch.StartNew();
-            for (int i = 0; i < LOOP; i++)
-            {
-                if (stringVal.StartsWith(findVal,StringComparison.Ordinal)) 
-                    runTimes++;
-            }
-            watch.Stop();
-            ordinalMilliseconds = watch.ElapsedMilliseconds;
-
-            Assert.Equal(LOOP, runTimes);
-            Assert.True(normalMilliseconds > ordinalMilliseconds);
-        }
-
-        [Fact]
-        public void EndWithPerformanceCompare()
-        {
-            string stringVal = "@@@fileid@@@,tteffadasdas ", findVal = " ";
-            const int LOOP = 5000000;
-            int runTimes = 0;
-            long normalMilliseconds = 0;
-            long ordinalMilliseconds = 0;
-
-            Stopwatch watch = Stopwatch.StartNew();
-            for (int i = 0; i < LOOP; i++)
-            {
-                if (stringVal.EndsWith(findVal)) 
-                    runTimes++;
-            }
-            watch.Stop();
-            normalMilliseconds = watch.ElapsedMilliseconds;
-            Assert.Equal(LOOP, runTimes);
-
-            runTimes = 0;
-            watch = Stopwatch.StartNew();
-            for (int i = 0; i < LOOP; i++)
-            {
-                if (stringVal.EndsWith(findVal,StringComparison.Ordinal)) 
-                    runTimes++;
-            }
-            watch.Stop();
-            ordinalMilliseconds = watch.ElapsedMilliseconds;
-
-            Assert.Equal(LOOP, runTimes);
-            Assert.True(normalMilliseconds > ordinalMilliseconds);
-        }
-    }
-}