feat: prepend '/' if MapPath not start with '/'

Author: phnx47

src/MetricServer.cs

@@ -34,8 +34,8 @@ public MetricServer(MetricServerOptions options)
         if (options == null)
             throw new ArgumentNullException(nameof(options));
 
-        if (string.IsNullOrEmpty(options.MapPath) || !options.MapPath.StartsWith("/"))
-            throw new ArgumentException($"mapPath '{options.MapPath}' should start with '/'");
+        if (!options.MapPath.StartsWith("/"))
+            options.MapPath = "/" + options.MapPath;
 
         _options = options;
 

tests/MetricServerTests.cs

@@ -113,13 +113,6 @@ public async Task MapPath_WithEndSlash()
         }
     }
 
-    [Fact]
-    public void Wrong_MapPath()
-    {
-        Assert.Throws<ArgumentException>(() => new MetricServer(
-            new MetricServerOptions { Port = _port, MapPath = "temp" }));
-    }
-
     [Theory]
     [InlineData("/metrics")]
     [InlineData("/metrics12")]
@@ -306,7 +299,6 @@ public async Task Add_Encoding()
         }
     }
 
-
     [Fact]
     public void Null_Options_Throws_ArgumentNullException()
     {