3da831b0c9* mcp: move to 2025-06-18 schema Add types and fields for the latest MCP schema. The main challenge here was dealing with the presence of _meta fields on many types, like Tool, Prompt and Resource. - Distinguish between the _meta field of a request's params, which includes a progress token, from the _meta field on other types, which is simply a map. - Redefine GetMeta to return a pointer to the map. We wanted to avoid that, but I don't see a clean way to do so. An alternative would be to have GetMeta return a map, and SetMeta to set it. - Provide GetProgressToken for requests only (not notifications or other types). - Still to do: deal with the meta and annotation fields of ContentBlock, which are currently duplicated for Resource and ResourceContents. * Meta and progress token redesign
102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
// Copyright 2025 The Go MCP SDK Authors. All rights reserved.
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// Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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package mcp_test
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import (
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"encoding/json"
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"testing"
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"github.com/google/go-cmp/cmp"
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"github.com/modelcontextprotocol/go-sdk/mcp"
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)
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func TestContent(t *testing.T) {
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tests := []struct {
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in *mcp.ContentBlock
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want string // json serialization
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}{
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{mcp.NewTextContent("hello"), `{"type":"text","text":"hello"}`},
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{
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mcp.NewImageContent([]byte("a1b2c3"), "image/png"),
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`{"type":"image","mimeType":"image/png","data":"YTFiMmMz"}`,
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},
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{
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mcp.NewAudioContent([]byte("a1b2c3"), "audio/wav"),
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`{"type":"audio","mimeType":"audio/wav","data":"YTFiMmMz"}`,
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},
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{
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mcp.NewResourceContents(
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mcp.NewTextResourceContents("file://foo", "text", "abc"),
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),
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`{"type":"resource","resource":{"uri":"file://foo","mimeType":"text","text":"abc"}}`,
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},
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{
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mcp.NewResourceContents(
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mcp.NewBlobResourceContents("file://foo", "image/png", []byte("a1b2c3")),
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),
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`{"type":"resource","resource":{"uri":"file://foo","mimeType":"image/png","blob":"YTFiMmMz"}}`,
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},
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}
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for _, test := range tests {
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got, err := json.Marshal(test.in)
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if err != nil {
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t.Fatal(err)
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}
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if diff := cmp.Diff(test.want, string(got)); diff != "" {
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t.Errorf("json.Marshal(%v) mismatch (-want +got):\n%s", test.in, diff)
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}
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var out *mcp.ContentBlock
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if err := json.Unmarshal(got, &out); err != nil {
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t.Fatal(err)
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}
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if diff := cmp.Diff(test.in, out); diff != "" {
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t.Errorf("json.Unmarshal(%q) mismatch (-want +got):\n%s", string(got), diff)
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}
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}
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}
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func TestResourceContents(t *testing.T) {
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for _, tt := range []struct {
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rc mcp.ResourceContents
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want string // marshaled JSON
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}{
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{
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mcp.ResourceContents{URI: "u", Text: "t"},
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`{"uri":"u","text":"t"}`,
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},
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{
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mcp.ResourceContents{URI: "u", MIMEType: "m", Text: "t"},
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`{"uri":"u","mimeType":"m","text":"t"}`,
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},
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{
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mcp.ResourceContents{URI: "u", Text: "", Blob: nil},
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`{"uri":"u","text":""}`,
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},
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{
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mcp.ResourceContents{URI: "u", Blob: []byte{}},
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`{"uri":"u","blob":""}`,
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},
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{
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mcp.ResourceContents{URI: "u", Blob: []byte{1}},
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`{"uri":"u","blob":"AQ=="}`,
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},
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} {
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data, err := json.Marshal(tt.rc)
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if err != nil {
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t.Fatal(err)
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}
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if got := string(data); got != tt.want {
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t.Errorf("%#v:\ngot %s\nwant %s", tt.rc, got, tt.want)
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}
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var urc mcp.ResourceContents
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if err := json.Unmarshal(data, &urc); err != nil {
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t.Fatal(err)
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}
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if diff := cmp.Diff(tt.rc, urc); diff != "" {
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t.Errorf("mismatch (-want, +got):\n%s", diff)
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}
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}
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}
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