Implement prefix for saved mapping file (#1040)

* Implement PrefixForSavedMappingFile

* Add missing new line

* Add missing new line

* Fix warning

* Fix typo

* Change from readonly to const

* Assign default value

* Use nameof()

* Change from readonly to const

* Update tests

* Update failing test

* Rename settingsMock to settings

* Create public const

* Use const from ProxyAndRecordSettings

---------

Co-authored-by: Mindaugas Laganeckas <mindaugas.laganeckas@nexigroup.com>

src/WireMock.Net/Settings/ProxyAndRecordSettings.cs

@@ -7,6 +7,11 @@ namespace WireMock.Settings;
 /// </summary>
 public class ProxyAndRecordSettings : HttpClientSettings
 {
+    /// <summary>
+    /// Default prefix value for saved mapping file
+    /// </summary>
+    public const string DefaultPrefixForSavedMappingFile = "Proxy Mapping for ";
+
     /// <summary>
     /// The URL to proxy.
     /// </summary>
@@ -95,9 +100,14 @@ public class ProxyAndRecordSettings : HttpClientSettings
     /// </summary>
     public bool AppendGuidToSavedMappingFile { get; set; }
 
+    /// <summary>
+    /// Set prefix for saved mapping file.
+    /// </summary>
+    public string PrefixForSavedMappingFile { get; set; } = DefaultPrefixForSavedMappingFile;
+
     /// <summary>
     /// Proxy all Api calls, irrespective of any condition
     /// </summary>
     [PublicAPI]
     public bool ProxyAll { get; set; } = false;
-}
+}

src/WireMock.Net/Settings/WireMockServerSettingsParser.cs

@@ -120,6 +120,7 @@ public static class WireMockServerSettingsParser
                 SaveMappingToFile = parser.GetBoolValue("SaveMappingToFile"),
                 UseDefinedRequestMatchers = parser.GetBoolValue(nameof(ProxyAndRecordSettings.UseDefinedRequestMatchers)),
                 AppendGuidToSavedMappingFile = parser.GetBoolValue(nameof(ProxyAndRecordSettings.AppendGuidToSavedMappingFile)),
+                PrefixForSavedMappingFile = parser.GetStringValue(nameof(ProxyAndRecordSettings.PrefixForSavedMappingFile), null),
                 Url = proxyUrl!,
                 SaveMappingSettings = new ProxySaveMappingSettings
                 {