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Follow-ups to #1610: de-draft 2026-07-28 terminology, renumber error codes, ProtocolVersion floor (#1671)

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Stephen Halter 2026-06-25 14:07:52 -07:00 • committed by GitHub
commit d6b1615988
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1 changed files with 785 additions and 898 deletions
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tests/ModelContextProtocol.AspNetCore.Tests/StreamableHttpServerConformanceTests.cs
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@ -916,13 +916,13 @@ public class StreamableHttpServerConformanceTests(ITestOutputHelper outputHelper
#region SEP-2243 Header Validation Tests
[Fact]
public async Task DraftVersion_RejectsMissingMcpMethodHeader()
public async Task July2026ProtocolVersion_RejectsMissingMcpMethodHeader()
{
// Draft is sessionless and served only on a stateless server (SEP-2567).
// Starting with the 2026-07-28 protocol revision, Streamable HTTP no longer supports sessions (SEP-2567) and is served only on a stateless server.
await StartAsync(stateless: true);
// Initialize with draft version to enable header validation
await CallInitializeWithDraftVersionAndValidateAsync();
// Initialize with the 2026-07-28 protocol version to enable header validation
await CallInitializeWithJuly2026ProtocolVersionAndValidateAsync();
// Send a tools/call request without Mcp-Method header — should be rejected
using var request = new HttpRequestMessage(HttpMethod.Post, "");
@ -935,10 +935,10 @@ public class StreamableHttpServerConformanceTests(ITestOutputHelper outputHelper
}
[Fact]
public async Task DraftVersion_RejectsMismatchedMcpMethodHeader()
public async Task July2026ProtocolVersion_RejectsMismatchedMcpMethodHeader()
{
await StartAsync(stateless: true);
await CallInitializeWithDraftVersionAndValidateAsync();
await CallInitializeWithJuly2026ProtocolVersionAndValidateAsync();
// Send a tools/call request but set Mcp-Method to wrong value
using var request = new HttpRequestMessage(HttpMethod.Post, "");
@ -951,10 +951,10 @@ public class StreamableHttpServerConformanceTests(ITestOutputHelper outputHelper
}
[Fact]
public async Task DraftVersion_AcceptsCorrectMcpMethodHeader()
public async Task July2026ProtocolVersion_AcceptsCorrectMcpMethodHeader()
{
await StartAsync(stateless: true);
await CallInitializeWithDraftVersionAndValidateAsync();
await CallInitializeWithJuly2026ProtocolVersionAndValidateAsync();
// Send a tools/call request with correct Mcp-Method and Mcp-Name headers
using var request = new HttpRequestMessage(HttpMethod.Post, "");
@ -968,12 +968,12 @@ public class StreamableHttpServerConformanceTests(ITestOutputHelper outputHelper
}
[Fact]
public async Task NonDraftVersion_DoesNotRequireMcpMethodHeader()
public async Task LegacyVersion_DoesNotRequireMcpMethodHeader()
{
await StartAsync();
await CallInitializeAndValidateAsync();
// With non-draft version, Mcp-Method header is not required
// With the legacy version, Mcp-Method header is not required
using var request = new HttpRequestMessage(HttpMethod.Post, "");
request.Content = JsonContent(CallTool("echo", """{"message":"hello"}"""));
request.Headers.Add("MCP-Protocol-Version", "2025-03-26");
@ -983,12 +983,12 @@ public class StreamableHttpServerConformanceTests(ITestOutputHelper outputHelper
Assert.Equal(HttpStatusCode.OK, response.StatusCode);
}
private async Task CallInitializeWithDraftVersionAndValidateAsync()
private async Task CallInitializeWithJuly2026ProtocolVersionAndValidateAsync()
{
HttpClient.DefaultRequestHeaders.Remove("mcp-session-id");
using var request = new HttpRequestMessage(HttpMethod.Post, "");
request.Content = JsonContent(InitializeRequestDraft);
request.Content = JsonContent(InitializeRequestJuly2026Protocol);
request.Headers.Add("MCP-Protocol-Version", "2026-07-28");
request.Headers.Add("Mcp-Method", "initialize");
@ -996,11 +996,11 @@ public class StreamableHttpServerConformanceTests(ITestOutputHelper outputHelper
var rpcResponse = await AssertSingleSseResponseAsync(response);
AssertServerInfo(rpcResponse);
// Draft protocol revision (SEP-2567) is sessionless; the server does not return mcp-session-id.
// Subsequent requests carry MCP-Protocol-Version=2026-07-28 to opt back into the draft path.
// Starting with the 2026-07-28 protocol revision (SEP-2567), Streamable HTTP no longer supports sessions; the server does not return mcp-session-id.
// Subsequent requests carry MCP-Protocol-Version=2026-07-28 so each one is handled independently.
}
private static string InitializeRequestDraft => """
private static string InitializeRequestJuly2026Protocol => """
{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2026-07-28","capabilities":{},"clientInfo":{"name":"IntegrationTestClient","version":"1.0.0"}}}
""";