204b59483bAfter some experience with the flattened version of Content, we see that it can easily lead to incorrect usage and is a harder API to read. Therefore, this CL changes back to a design similar to what we had prior to https://go.dev/cl/672415, though opting to promote content unmarshalling to the protocol types that use it, which leads to an overall simpler api.
83 lines
1.8 KiB
Go
83 lines
1.8 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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"context"
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"log"
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"os"
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"os/exec"
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"runtime"
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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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const runAsServer = "_MCP_RUN_AS_SERVER"
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func TestMain(m *testing.M) {
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if os.Getenv(runAsServer) != "" {
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os.Unsetenv(runAsServer)
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runServer()
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return
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}
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os.Exit(m.Run())
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}
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func runServer() {
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ctx := context.Background()
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server := mcp.NewServer("greeter", "v0.0.1", nil)
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server.AddTools(mcp.NewServerTool("greet", "say hi", SayHi))
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if err := server.Run(ctx, mcp.NewStdioTransport()); err != nil {
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log.Fatal(err)
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}
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}
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func TestCmdTransport(t *testing.T) {
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// Conservatively, limit to major OS where we know that os.Exec is
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// supported.
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switch runtime.GOOS {
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case "darwin", "linux", "windows":
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default:
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t.Skip("unsupported OS")
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}
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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exe, err := os.Executable()
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if err != nil {
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t.Fatal(err)
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}
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cmd := exec.Command(exe)
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cmd.Env = append(os.Environ(), runAsServer+"=true")
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client := mcp.NewClient("client", "v0.0.1", nil)
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session, err := client.Connect(ctx, mcp.NewCommandTransport(cmd))
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if err != nil {
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log.Fatal(err)
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}
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got, err := session.CallTool(ctx, &mcp.CallToolParams{
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Name: "greet",
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Arguments: map[string]any{"name": "user"},
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})
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if err != nil {
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log.Fatal(err)
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}
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want := &mcp.CallToolResult{
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Content: []mcp.Content{
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&mcp.TextContent{Text: "Hi user"},
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},
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}
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("greet returned unexpected content (-want +got):\n%s", diff)
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}
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if err := session.Close(); err != nil {
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t.Fatalf("closing server: %v", err)
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}
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}
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