119 lines
3.5 KiB
Go
119 lines
3.5 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 oauthex
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import (
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"context"
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"encoding/json"
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"net/http"
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"net/http/httptest"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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"testing"
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)
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func TestAuthMetaParse(t *testing.T) {
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// Verify that we parse Google's auth server metadata.
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data, err := os.ReadFile(filepath.FromSlash("testdata/google-auth-meta.json"))
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if err != nil {
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t.Fatal(err)
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}
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var a AuthServerMeta
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if err := json.Unmarshal(data, &a); err != nil {
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t.Fatal(err)
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}
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// Spot check.
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if g, w := a.Issuer, "https://accounts.google.com"; g != w {
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t.Errorf("got %q, want %q", g, w)
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}
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}
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func TestGetAuthServerMetaPKCESupport(t *testing.T) {
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ctx := context.Background()
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tests := []struct {
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name string
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hasPKCESupport bool
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wantError string
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}{
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{
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name: "server_with_pkce_support",
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hasPKCESupport: true,
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},
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{
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name: "server_without_pkce_support",
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hasPKCESupport: false,
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wantError: "does not implement PKCE",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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// Start a fake OAuth 2.1 auth server
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wrapper := http.NewServeMux()
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wrapper.HandleFunc("/.well-known/oauth-authorization-server", func(w http.ResponseWriter, r *http.Request) {
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u, _ := url.Parse("https://" + r.Host)
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issuer := "https://localhost:" + u.Port()
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metadata := AuthServerMeta{
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Issuer: issuer,
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AuthorizationEndpoint: issuer + "/authorize",
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TokenEndpoint: issuer + "/token",
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RegistrationEndpoint: issuer + "/register",
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JWKSURI: issuer + "/.well-known/jwks.json",
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ScopesSupported: []string{"openid", "profile", "email"},
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ResponseTypesSupported: []string{"code"},
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GrantTypesSupported: []string{"authorization_code"},
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TokenEndpointAuthMethodsSupported: []string{"none"},
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}
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// Add PKCE support based on test case
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if tt.hasPKCESupport {
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metadata.CodeChallengeMethodsSupported = []string{"S256"}
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}
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// If hasPKCESupport is false, CodeChallengeMethodsSupported remains empty
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(metadata)
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})
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ts := httptest.NewTLSServer(wrapper)
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defer ts.Close()
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// The fake server sets issuer to https://localhost:<port>, so compute that issuer.
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u, _ := url.Parse(ts.URL)
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issuer := "https://localhost:" + u.Port()
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metadataURL := issuer + "/.well-known/oauth-authorization-server"
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// The fake server presents a cert for example.com; set ServerName accordingly.
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httpClient := ts.Client()
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if tr, ok := httpClient.Transport.(*http.Transport); ok {
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clone := tr.Clone()
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clone.TLSClientConfig.ServerName = "example.com"
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httpClient.Transport = clone
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}
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meta, err := GetAuthServerMeta(ctx, metadataURL, issuer, httpClient)
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if tt.wantError != "" {
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if err == nil {
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t.Fatal("wanted error but got none")
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}
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if !strings.Contains(err.Error(), tt.wantError) {
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t.Errorf("wanted error to contain %q, but got: %v", tt.wantError, err)
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}
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} else {
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if err != nil {
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t.Fatalf("unwanted error: %v", err)
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}
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if meta == nil {
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t.Fatal("wanted metadata but got nil")
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}
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// Verify PKCE support is present
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if len(meta.CodeChallengeMethodsSupported) == 0 {
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t.Error("wanted PKCE support but CodeChallengeMethodsSupported is empty")
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}
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}
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})
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}
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}
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