refactor: use of file scope namespace

Author: egbakou

tests/FileSizeFromBase64.NET.Tests/FileSizeHelpersTests.cs

@@ -1,24 +1,23 @@
 using Shouldly;
 using Xunit;
 
-namespace FileSizeFromBase64.NET.Tests
+namespace FileSizeFromBase64.NET.Tests;
+
+public class FileSizeHelpersTests
 {
-    public class FileSizeHelpersTests
-    {
 
-        [Fact]
-        public void  GetFileSizeFromBase64String_Should_Return_0_If_String_Is_Null()
-        {
-            var size = FileSizeHelpers.GetFileSizeFromBase64String(null);
-            size.ShouldBe(0);
-        }
+    [Fact]
+    public void  GetFileSizeFromBase64String_Should_Return_0_If_String_Is_Null()
+    {
+        var size = FileSizeHelpers.GetFileSizeFromBase64String(null);
+        size.ShouldBe(0);
+    }
 
-        [Theory]
-        [ClassData(typeof(Base64FileTheoryData))]
-        public void GetFileSizeFromBase64String_Should_Return_The_Right_Size(Base64File base64File)
-        {
-            var size = FileSizeHelpers.GetFileSizeFromBase64String(base64File.Base64String, base64File.UsePaddingsRules);
-            size.ShouldBe(base64File.Size);
-        }
+    [Theory]
+    [ClassData(typeof(Base64FileTheoryData))]
+    public void GetFileSizeFromBase64String_Should_Return_The_Right_Size(Base64File base64File)
+    {
+        var size = FileSizeHelpers.GetFileSizeFromBase64String(base64File.Base64String, base64File.UsePaddingsRules);
+        size.ShouldBe(base64File.Size);
     }
 }