Add Dailymotion to the list of supported providers

src/OpenIddict.Client.AspNetCore/OpenIddictClientAspNetCoreExtensions.cs

@@ -48,14 +48,14 @@ public static class OpenIddictClientAspNetCoreExtensions
 
         // Register the option initializer used by the OpenIddict ASP.NET Core client integration services.
         // Note: TryAddEnumerable() is used here to ensure the initializers are only registered once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<AuthenticationOptions>, OpenIddictClientAspNetCoreConfiguration>(),
             ServiceDescriptor.Singleton<IPostConfigureOptions<AuthenticationOptions>, OpenIddictClientAspNetCoreConfiguration>(),
 
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictClientOptions>, OpenIddictClientAspNetCoreConfiguration>(),
             ServiceDescriptor.Singleton<IPostConfigureOptions<OpenIddictClientAspNetCoreOptions>, OpenIddictClientAspNetCoreConfiguration>()
-        });
+        ]);
 
         return new OpenIddictClientAspNetCoreBuilder(builder.Services);
     }

src/OpenIddict.Client.DataProtection/OpenIddictClientDataProtectionExtensions.cs

@@ -40,11 +40,11 @@ public static class OpenIddictClientDataProtectionExtensions
         builder.Services.TryAddSingleton<RequireDataProtectionTokenFormat>();
 
         // Note: TryAddEnumerable() is used here to ensure the initializers are registered only once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictClientOptions>, OpenIddictClientDataProtectionConfiguration>(),
             ServiceDescriptor.Singleton<IPostConfigureOptions<OpenIddictClientDataProtectionOptions>, OpenIddictClientDataProtectionConfiguration>()
-        });
+        ]);
 
         return new OpenIddictClientDataProtectionBuilder(builder.Services);
     }

src/OpenIddict.Client.Owin/OpenIddictClientOwinExtensions.cs

@@ -49,11 +49,11 @@ public static class OpenIddictClientOwinExtensions
 
         // Register the option initializer used by the OpenIddict OWIN client integration services.
         // Note: TryAddEnumerable() is used here to ensure the initializers are only registered once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictClientOptions>, OpenIddictClientOwinConfiguration>(),
             ServiceDescriptor.Singleton<IPostConfigureOptions<OpenIddictClientOwinOptions>, OpenIddictClientOwinConfiguration>()
-        });
+        ]);
 
         return new OpenIddictClientOwinBuilder(builder.Services);
     }

src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationExtensions.cs

@@ -72,8 +72,8 @@ public static class OpenIddictClientSystemIntegrationExtensions
 
         // Register the option initializer and the background service used by the OpenIddict client system integration services.
         // Note: TryAddEnumerable() is used here to ensure the initializers and the background service are only registered once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IHostedService, OpenIddictClientSystemIntegrationHttpListener>(),
             ServiceDescriptor.Singleton<IHostedService, OpenIddictClientSystemIntegrationPipeListener>(),
 
@@ -81,7 +81,7 @@ public static class OpenIddictClientSystemIntegrationExtensions
             ServiceDescriptor.Singleton<IPostConfigureOptions<OpenIddictClientOptions>, OpenIddictClientSystemIntegrationConfiguration>(),
 
             ServiceDescriptor.Singleton<IPostConfigureOptions<OpenIddictClientSystemIntegrationOptions>, OpenIddictClientSystemIntegrationConfiguration>()
-        });
+        ]);
 
         return new OpenIddictClientSystemIntegrationBuilder(builder.Services);
     }

src/OpenIddict.Client.SystemNetHttp/OpenIddictClientSystemNetHttpExtensions.cs

@@ -40,11 +40,11 @@ public static class OpenIddictClientSystemNetHttpExtensions
         builder.Services.TryAddSingleton<RequireHttpMetadataUri>();
 
         // Note: TryAddEnumerable() is used here to ensure the initializers are registered only once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictClientOptions>, OpenIddictClientSystemNetHttpConfiguration>(),
             ServiceDescriptor.Singleton<IConfigureOptions<HttpClientFactoryOptions>, OpenIddictClientSystemNetHttpConfiguration>()
-        });
+        ]);
 
         return new OpenIddictClientSystemNetHttpBuilder(builder.Services);
     }

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationExtensions.cs

@@ -39,11 +39,11 @@ public static partial class OpenIddictClientWebIntegrationExtensions
             .Select(descriptor => descriptor.ServiceDescriptor));
 
         // Note: TryAddEnumerable() is used here to ensure the initializers are registered only once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictClientOptions>, OpenIddictClientWebIntegrationConfiguration>(),
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictClientSystemNetHttpOptions>, OpenIddictClientWebIntegrationConfiguration>()
-        });
+        ]);
 
         // Note: the IPostConfigureOptions<OpenIddictClientOptions> service responsible for populating
         // the client registrations MUST be registered before OpenIddictClientConfiguration to ensure

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Exchange.cs

@@ -11,6 +11,7 @@ using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Net.Http.Json;
 using System.Text;
+using System.Text.Json;
 using OpenIddict.Extensions;
 using static OpenIddict.Client.SystemNetHttp.OpenIddictClientSystemNetHttpConstants;
 using static OpenIddict.Client.SystemNetHttp.OpenIddictClientSystemNetHttpHandlerFilters;
@@ -356,6 +357,16 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                     return default;
                 }
 
+                // Note: when using the client credentials grant, Dailymotion returns a "refresh_token"
+                // node with a JSON null value, which isn't allowed by OpenIddict (that requires a string).
+                //
+                // To work around that, the "refresh_token" node is removed when it is set to a null value .
+                if (context.Registration.ProviderType is ProviderTypes.Dailymotion && (JsonElement?)
+                    context.Response[Parameters.RefreshToken] is { ValueKind: JsonValueKind.Null })
+                {
+                    context.Response.RefreshToken = null;
+                }
+
                 // Note: Deezer doesn't return a standard "expires_in" parameter
                 // but returns an equivalent "expires" integer parameter instead.
                 if (context.Registration.ProviderType is ProviderTypes.Deezer)

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs

@@ -686,6 +686,12 @@ public static partial class OpenIddictClientWebIntegrationHandlers
 
             context.UserinfoEndpoint = context.Registration.ProviderType switch
             {
+                // Dailymotion's userinfo endpoint requires sending the user identifier in the URI path.
+                ProviderTypes.Dailymotion when (string?) context.TokenResponse?["uid"] is string identifier
+                    => OpenIddictHelpers.CreateAbsoluteUri(
+                        left : new Uri("https://api.dailymotion.com/user", UriKind.Absolute),
+                        right: new Uri(identifier, UriKind.Relative)),
+
                 // HubSpot doesn't have a static userinfo endpoint but allows retrieving basic information
                 // by using an access token info endpoint that requires sending the token in the URI path.
                 ProviderTypes.HubSpot when
@@ -852,10 +858,20 @@ public static partial class OpenIddictClientWebIntegrationHandlers
 
             Debug.Assert(context.UserinfoRequest is not null, SR.GetResourceString(SR.ID4008));
 
+            // Dailymotion limits the number of fields returned by the userinfo endpoint
+            // but allows returning additional information using special parameters that
+            // determine what fields will be returned as part of the userinfo response.
+            if (context.Registration.ProviderType is ProviderTypes.Dailymotion)
+            {
+                var settings = context.Registration.GetDailymotionSettings();
+
+                context.UserinfoRequest["fields"] = string.Join(",", settings.UserFields);
+            }
+
             // Facebook limits the number of fields returned by the userinfo endpoint
             // but allows returning additional information using special parameters that
             // determine what fields will be returned as part of the userinfo response.
-            if (context.Registration.ProviderType is ProviderTypes.Facebook)
+            else if (context.Registration.ProviderType is ProviderTypes.Facebook)
             {
                 var settings = context.Registration.GetFacebookSettings();
 
@@ -1084,9 +1100,9 @@ public static partial class OpenIddictClientWebIntegrationHandlers
             context.MergedPrincipal.SetClaim(ClaimTypes.Name, issuer: issuer, value: context.Registration.ProviderType switch
             {
                 // These providers return the username as a custom "username" node:
-                ProviderTypes.ArcGisOnline or ProviderTypes.Discord  or ProviderTypes.DeviantArt or
-                ProviderTypes.Lichess      or ProviderTypes.Mixcloud or ProviderTypes.Trakt      or
-                ProviderTypes.WordPress
+                ProviderTypes.ArcGisOnline or ProviderTypes.Dailymotion or ProviderTypes.Discord  or
+                ProviderTypes.DeviantArt   or ProviderTypes.Lichess     or ProviderTypes.Mixcloud or
+                ProviderTypes.Trakt        or ProviderTypes.WordPress
                     => (string?) context.UserinfoResponse?["username"],
 
                 // Basecamp and Harvest don't return a username so one is created using the "first_name" and "last_name" nodes:
@@ -1166,12 +1182,12 @@ public static partial class OpenIddictClientWebIntegrationHandlers
                     => (string?) context.UserinfoResponse?["username"],
 
                 // These providers return the user identifier as a custom "id" node:
-                ProviderTypes.Basecamp or ProviderTypes.Deezer        or ProviderTypes.Discord    or
-                ProviderTypes.Facebook or ProviderTypes.GitHub        or ProviderTypes.Harvest    or
-                ProviderTypes.Kroger   or ProviderTypes.Lichess       or ProviderTypes.Nextcloud  or
-                ProviderTypes.Patreon  or ProviderTypes.Reddit        or ProviderTypes.Smartsheet or
-                ProviderTypes.Spotify  or ProviderTypes.SubscribeStar or ProviderTypes.Twitter    or
-                ProviderTypes.Zoom
+                ProviderTypes.Basecamp   or ProviderTypes.Dailymotion or ProviderTypes.Deezer        or
+                ProviderTypes.Discord    or ProviderTypes.Facebook    or ProviderTypes.GitHub        or
+                ProviderTypes.Harvest    or ProviderTypes.Kroger      or ProviderTypes.Lichess       or
+                ProviderTypes.Nextcloud  or ProviderTypes.Patreon     or ProviderTypes.Reddit        or
+                ProviderTypes.Smartsheet or ProviderTypes.Spotify     or ProviderTypes.SubscribeStar or
+                ProviderTypes.Twitter    or ProviderTypes.Zoom
                     => (string?) context.UserinfoResponse?["id"],
 
                 // Bitbucket returns the user identifier as a custom "uuid" node:

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xml

@@ -263,6 +263,61 @@
              Description="The User Pool ID" />
   </Provider>
 
+  <!--
+                              ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
+                              ██ ▄▄▀█ ▄▄▀█▄ ▄██ █████ ███ ██ ▄▀▄ ██ ▄▄▄ █▄▄ ▄▄█▄ ▄██ ▄▄▄ ██ ▀██ ██
+                              ██ ██ █ ▀▀ ██ ███ █████▄▀▀▀▄██ █ █ ██ ███ ███ ████ ███ ███ ██ █ █ ██
+                              ██ ▀▀ █ ██ █▀ ▀██ ▀▀ ████ ████ ███ ██ ▀▀▀ ███ ███▀ ▀██ ▀▀▀ ██ ██▄ ██
+                              ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
+  -->
+
+  <Provider Name="Dailymotion" Id="e289f3ca-6d1d-45f9-8be0-8a649cc4a700"
+            Documentation="https://developers.dailymotion.com/guides/platform-api-authentication/">
+    <Environment Issuer="https://api.dailymotion.com/">
+      <Configuration AuthorizationEndpoint="https://api.dailymotion.com/oauth/authorize"
+                     TokenEndpoint="https://api.dailymotion.com/oauth/token">
+        <GrantType Value="authorization_code" />
+        <GrantType Value="client_credentials" />
+        <GrantType Value="password" />
+        <GrantType Value="refresh_token" />
+      </Configuration>
+    </Environment>
+
+    <Setting PropertyName="UserFields" ParameterName="fields" Collection="true" Type="String"
+             Description="The list of user fields to expand from the userinfo endpoint (by default, most common fields are requested)">
+      <Item Value="active"          Default="true" Required="false" />
+      <Item Value="address"         Default="true" Required="false" />
+      <Item Value="birthday"        Default="true" Required="false" />
+      <Item Value="city"            Default="true" Required="false" />
+      <Item Value="country"         Default="true" Required="false" />
+      <Item Value="cover_url"       Default="true" Required="false" />
+      <Item Value="created_time"    Default="true" Required="false" />
+      <Item Value="email"           Default="true" Required="false" />
+      <Item Value="facebook_url"    Default="true" Required="false" />
+      <Item Value="first_name"      Default="true" Required="false" />
+      <Item Value="followers_total" Default="true" Required="false" />
+      <Item Value="following_total" Default="true" Required="false" />
+      <Item Value="fullname"        Default="true" Required="false" />
+      <Item Value="gender"          Default="true" Required="false" />
+      <Item Value="id"              Default="true" Required="false" />
+      <Item Value="instagram_url"   Default="true" Required="false" />
+      <Item Value="language"        Default="true" Required="false" />
+      <Item Value="last_name"       Default="true" Required="false" />
+      <Item Value="linkedin_url"    Default="true" Required="false" />
+      <Item Value="nickname"        Default="true" Required="false" />
+      <Item Value="pinterest_url"   Default="true" Required="false" />
+      <Item Value="screenname"      Default="true" Required="false" />
+      <Item Value="status"          Default="true" Required="false" />
+      <Item Value="twitter_url"     Default="true" Required="false" />
+      <Item Value="url"             Default="true" Required="false" />
+      <Item Value="username"        Default="true" Required="false" />
+      <Item Value="verified"        Default="true" Required="false" />
+      <Item Value="videos_total"    Default="true" Required="false" />
+      <Item Value="views_total"     Default="true" Required="false" />
+      <Item Value="website_url"     Default="true" Required="false" />
+    </Setting>
+  </Provider>
+
   <!--
                                             ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
                                             ██ ▄▄▀██ ▄▄▄██ ▄▄▄██ ▄▄▄ ██ ▄▄▄██ ▄▄▀██

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationProviders.xsd

@@ -87,6 +87,7 @@
                                     <xs:enumeration value="authorization_code" />
                                     <xs:enumeration value="client_credentials" />
                                     <xs:enumeration value="implicit" />
+                                    <xs:enumeration value="password" />
                                     <xs:enumeration value="refresh_token" />
                                     <xs:enumeration value="urn:ietf:params:oauth:grant-type:device_code" />
                                   </xs:restriction>

src/OpenIddict.Server.AspNetCore/OpenIddictServerAspNetCoreExtensions.cs

@@ -52,15 +52,15 @@ public static class OpenIddictServerAspNetCoreExtensions
 
         // Register the option initializer used by the OpenIddict ASP.NET Core server integration services.
         // Note: TryAddEnumerable() is used here to ensure the initializers are only registered once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<AuthenticationOptions>, OpenIddictServerAspNetCoreConfiguration>(),
             ServiceDescriptor.Singleton<IPostConfigureOptions<AuthenticationOptions>, OpenIddictServerAspNetCoreConfiguration>(),
 
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictServerOptions>, OpenIddictServerAspNetCoreConfiguration>(),
 
             ServiceDescriptor.Singleton<IPostConfigureOptions<OpenIddictServerAspNetCoreOptions>, OpenIddictServerAspNetCoreConfiguration>()
-        });
+        ]);
 
         return new OpenIddictServerAspNetCoreBuilder(builder.Services);
     }

src/OpenIddict.Server.DataProtection/OpenIddictServerDataProtectionExtensions.cs

@@ -40,11 +40,11 @@ public static class OpenIddictServerDataProtectionExtensions
         builder.Services.TryAddSingleton<RequireDataProtectionTokenFormat>();
 
         // Note: TryAddEnumerable() is used here to ensure the initializers are registered only once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictServerOptions>, OpenIddictServerDataProtectionConfiguration>(),
             ServiceDescriptor.Singleton<IPostConfigureOptions<OpenIddictServerDataProtectionOptions>, OpenIddictServerDataProtectionConfiguration>()
-        });
+        ]);
 
         return new OpenIddictServerDataProtectionBuilder(builder.Services);
     }

src/OpenIddict.Server.Owin/OpenIddictServerOwinExtensions.cs

@@ -54,11 +54,11 @@ public static class OpenIddictServerOwinExtensions
 
         // Register the option initializers used by the OpenIddict OWIN server integration services.
         // Note: TryAddEnumerable() is used here to ensure the initializers are only registered once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictServerOptions>, OpenIddictServerOwinConfiguration>(),
             ServiceDescriptor.Singleton<IPostConfigureOptions<OpenIddictServerOwinOptions>, OpenIddictServerOwinConfiguration>()
-        });
+        ]);
 
         return new OpenIddictServerOwinBuilder(builder.Services);
     }

src/OpenIddict.Validation.AspNetCore/OpenIddictValidationAspNetCoreExtensions.cs

@@ -42,13 +42,13 @@ public static class OpenIddictValidationAspNetCoreExtensions
 
         // Register the option initializer used by the OpenIddict ASP.NET Core validation integration services.
         // Note: TryAddEnumerable() is used here to ensure the initializers are only registered once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<AuthenticationOptions>, OpenIddictValidationAspNetCoreConfiguration>(),
             ServiceDescriptor.Singleton<IPostConfigureOptions<AuthenticationOptions>, OpenIddictValidationAspNetCoreConfiguration>(),
 
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictValidationOptions>, OpenIddictValidationAspNetCoreConfiguration>()
-        });
+        ]);
 
         return new OpenIddictValidationAspNetCoreBuilder(builder.Services);
     }

src/OpenIddict.Validation.DataProtection/OpenIddictValidationDataProtectionExtensions.cs

@@ -36,11 +36,11 @@ public static class OpenIddictValidationDataProtectionExtensions
         builder.Services.TryAdd(OpenIddictValidationDataProtectionHandlers.DefaultHandlers.Select(descriptor => descriptor.ServiceDescriptor));
 
         // Note: TryAddEnumerable() is used here to ensure the initializers are registered only once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictValidationOptions>, OpenIddictValidationDataProtectionConfiguration>(),
             ServiceDescriptor.Singleton<IPostConfigureOptions<OpenIddictValidationDataProtectionOptions>, OpenIddictValidationDataProtectionConfiguration>()
-        });
+        ]);
 
         return new OpenIddictValidationDataProtectionBuilder(builder.Services);
     }

src/OpenIddict.Validation.Owin/OpenIddictValidationOwinExtensions.cs

@@ -43,10 +43,10 @@ public static class OpenIddictValidationOwinExtensions
 
         // Register the option initializers used by the OpenIddict OWIN validation integration services.
         // Note: TryAddEnumerable() is used here to ensure the initializers are only registered once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictValidationOptions>, OpenIddictValidationOwinConfiguration>()
-        });
+        ]);
 
         return new OpenIddictValidationOwinBuilder(builder.Services);
     }

src/OpenIddict.Validation.ServerIntegration/OpenIddictValidationServerIntegrationExtensions.cs

@@ -31,11 +31,11 @@ public static class OpenIddictValidationServerIntegrationExtensions
         }
 
         // Note: TryAddEnumerable() is used here to ensure the initializers are registered only once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictValidationOptions>, OpenIddictValidationServerIntegrationConfiguration>(),
             ServiceDescriptor.Singleton<IPostConfigureOptions<OpenIddictValidationOptions>, OpenIddictValidationServerIntegrationConfiguration>()
-        });
+        ]);
 
         return new OpenIddictValidationServerIntegrationBuilder(builder.Services);
     }

src/OpenIddict.Validation.SystemNetHttp/OpenIddictValidationSystemNetHttpExtensions.cs

@@ -40,11 +40,11 @@ public static class OpenIddictValidationSystemNetHttpExtensions
         builder.Services.TryAddSingleton<RequireHttpMetadataUri>();
 
         // Note: TryAddEnumerable() is used here to ensure the initializers are registered only once.
-        builder.Services.TryAddEnumerable(new[]
-        {
+        builder.Services.TryAddEnumerable(
+        [
             ServiceDescriptor.Singleton<IConfigureOptions<OpenIddictValidationOptions>, OpenIddictValidationSystemNetHttpConfiguration>(),
             ServiceDescriptor.Singleton<IConfigureOptions<HttpClientFactoryOptions>, OpenIddictValidationSystemNetHttpConfiguration>()
-        });
+        ]);
 
         return new OpenIddictValidationSystemNetHttpBuilder(builder.Services);
     }

test/OpenIddict.Abstractions.Tests/Primitives/OpenIddictExtensionsTests.cs

@@ -1026,7 +1026,7 @@ public class OpenIddictExtensionsTests
 
     [Theory]
     [InlineData(null)]
-    [InlineData(new object[] { new string[0] })]
+    [InlineData([new string[0]])]
     public void Claim_SetDestinations_RemovesPropertyForEmptyArray(string[] destinations)
     {
         // Arrange