7130f0f081
Meta is a struct that contains a map[string]any, and a ProgressToken field. Each Params and Result type has a Meta as a value field. Meta marshals and unmarshals specially, so the ProgressToken field becomes part of the map. The marshalling code is generalized in anticipation of every Params and Result growing a map of additional properties. Change-Id: I6d2f34270d33501c96437f24f91ef3e51d20d955 Reviewed-on: https://go-review.googlesource.com/c/tools/+/674956 Reviewed-by: Sam Thanawalla <samthanawalla@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Auto-Submit: Jonathan Amsterdam <jba@google.com> Reviewed-by: Robert Findley <rfindley@google.com>
70 lines
1.6 KiB
Go
70 lines
1.6 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
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import (
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"encoding/json"
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"strings"
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"testing"
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"github.com/google/go-cmp/cmp"
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)
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func TestMetaMarshal(t *testing.T) {
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// Verify that Meta values round-trip.
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for _, meta := range []Meta{
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{Data: nil, ProgressToken: nil},
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{Data: nil, ProgressToken: "p"},
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{Data: map[string]any{"d": true}, ProgressToken: nil},
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{Data: map[string]any{"d": true}, ProgressToken: "p"},
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} {
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got := roundTrip(t, meta)
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if !cmp.Equal(got, meta) {
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t.Errorf("\ngot %#v\nwant %#v", got, meta)
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}
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}
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// Check errors.
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for _, tt := range []struct {
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meta Meta
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want string
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}{
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{
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Meta{Data: map[string]any{"progressToken": "p"}, ProgressToken: 1},
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"duplicate",
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},
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{
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Meta{ProgressToken: true},
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"bad type",
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},
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} {
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_, err := json.Marshal(tt.meta)
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if err == nil || !strings.Contains(err.Error(), tt.want) {
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t.Errorf("%+v: got %v, want error containing %q", tt.meta, err, tt.want)
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}
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}
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// Accept progressToken in map if the field is nil.
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// It will unmarshal by populating ProgressToken.
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meta := Meta{Data: map[string]any{"progressToken": "p"}}
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got := roundTrip(t, meta)
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want := Meta{ProgressToken: "p"}
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if !cmp.Equal(got, want) {
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t.Errorf("got %+v, want %+v", got, want)
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}
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}
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func roundTrip[T any](t *testing.T, v T) T {
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t.Helper()
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bytes, err := json.Marshal(v)
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if err != nil {
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t.Fatal(err)
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}
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var res T
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if err := json.Unmarshal(bytes, &res); err != nil {
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t.Fatal(err)
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}
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return res
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}
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