53 lines
1.8 KiB
C#
53 lines
1.8 KiB
C#
using Microsoft.Extensions.DependencyInjection;
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using ModelContextProtocol.Client;
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using ModelContextProtocol.Protocol;
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using ModelContextProtocol.Server;
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namespace ModelContextProtocol.Tests.Server;
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/// <summary>
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/// Verifies that the built-in <c>ping</c> handler is gated by protocol version.
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/// SEP-2575 (the draft 2026-07-28 revision) removes <c>ping</c>; servers must
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/// respond with <c>-32601 MethodNotFound</c>. Legacy protocol versions still
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/// support <c>ping</c> per the spec.
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/// </summary>
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public sealed class PingProtocolGatingTests : ClientServerTestBase
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{
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public PingProtocolGatingTests(ITestOutputHelper testOutputHelper)
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: base(testOutputHelper, startServer: false)
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{
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}
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protected override void ConfigureServices(ServiceCollection services, IMcpServerBuilder mcpServerBuilder)
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{
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}
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[Fact]
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public async Task Ping_OnDraftSession_ReturnsMethodNotFound()
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{
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StartServer();
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await using var client = await CreateMcpClientForServer(new McpClientOptions
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{
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ProtocolVersion = McpSession.DraftProtocolVersion,
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});
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var ex = await Assert.ThrowsAsync<McpProtocolException>(async () =>
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await client.PingAsync(cancellationToken: TestContext.Current.CancellationToken));
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Assert.Equal(McpErrorCode.MethodNotFound, ex.ErrorCode);
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}
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[Fact]
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public async Task Ping_OnLegacySession_StillSucceeds()
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{
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// Default server config; client pinned to 2025-11-25.
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StartServer();
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await using var client = await CreateMcpClientForServer(new McpClientOptions
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{
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ProtocolVersion = "2025-11-25",
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});
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var result = await client.PingAsync(cancellationToken: TestContext.Current.CancellationToken);
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Assert.NotNull(result);
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}
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}
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