Implement a server-side config service interface.

server/config/service_test.go

+// Copyright 2016 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package config
+
+import (
+        "encoding/base64"
+        "encoding/json"
+        "fmt"
+        "net/http"
+        "net/http/httptest"
+        "net/url"
+        "testing"
+
+        configApi "github.com/luci/luci-go/common/api/luci_config/config/v1"
+        "github.com/luci/luci-go/server/auth"
+        "github.com/luci/luci-go/server/auth/authtest"
+        "github.com/luci/luci-go/server/auth/delegation"
+
+        "golang.org/x/net/context"
+
+        . "github.com/smartystreets/goconvey/convey"
+)
+
+type remoteInterfaceService struct {
+        err     error
+        lastReq *http.Request
+        res     interface{}
+}
+
+func (ris *remoteInterfaceService) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+        ris.lastReq = req
+        if err := ris.err; err != nil {
+                http.Error(rw, err.Error(), http.StatusInternalServerError)
+                return
+        }
+
+        if err := json.NewEncoder(rw).Encode(ris.res); err != nil {
+                http.Error(rw, fmt.Sprintf("failed to encode JSON: %s", err), http.StatusInternalServerError)
+                return
+        }
+}
+
+func TestRemoteService(t *testing.T) {
+        t.Parallel()
+
+        Convey(`Testing the remote service`, t, func() {
+                c := context.Background()
+
+                fs := authtest.FakeState{
+                        Identity: "user:foo@bar.baz",
+                }
+                c = auth.WithState(c, &fs)
+                c = authtest.MockAuthConfig(c)
+
+                ris := remoteInterfaceService{}
+                svr := httptest.NewServer(&ris)
+                defer svr.Close()
+
+                c = WithBackend(c, &ClientBackend{
+                        Provider: &RemoteClientProvider{
+                                BaseURL:                 svr.URL,
+                                testUserDelegationToken: "user token",
+                        },
+                })
+
+                b64 := func(v string) string { return base64.StdEncoding.EncodeToString([]byte(v)) }
+
+                Convey(`Can get the service URL`, func() {
+                        hostURL, err := url.Parse(svr.URL)
+                        if err != nil {
+                                panic(err)
+                        }
+                        hostURL.Path = "/_ah/api/config/v1/"
+
+                        So(ServiceURL(c), ShouldResemble, *hostURL)
+                })
+
+                Convey(`Can resolve a single config`, func() {
+                        ris.res = configApi.LuciConfigGetConfigResponseMessage{
+                                Content:     b64("ohai"),
+                                ContentHash: "####",
+                                Revision:    "v1",
+                        }
+
+                        Convey(`AsService`, func() {
+                                var val string
+                                So(Get(c, AsService, "foo/bar", "baz", String(&val), nil), ShouldBeNil)
+                                So(val, ShouldEqual, "ohai")
+
+                                So(ris.lastReq.URL.Path, ShouldEqual, "/_ah/api/config/v1/config_sets/foo/bar/config/baz")
+                                So(ris.lastReq.Header.Get("Authorization"), ShouldEqual, "Bearer fake_token")
+                                So(ris.lastReq.Header.Get(delegation.HTTPHeaderName), ShouldEqual, "")
+                        })
+
+                        Convey(`AsUser`, func() {
+                                var val string
+                                So(Get(c, AsUser, "foo/bar", "baz", String(&val), nil), ShouldBeNil)
+                                So(val, ShouldEqual, "ohai")
+
+                                So(ris.lastReq.URL.Path, ShouldEqual, "/_ah/api/config/v1/config_sets/foo/bar/config/baz")
+                                So(ris.lastReq.Header.Get("Authorization"), ShouldEqual, "Bearer fake_token")
+                                So(ris.lastReq.Header.Get(delegation.HTTPHeaderName), ShouldEqual, "user token")
+                        })
+
+                        Convey(`AsAnonymous`, func() {
+                                var val string
+                                So(Get(c, AsAnonymous, "foo/bar", "baz", String(&val), nil), ShouldBeNil)
+                                So(val, ShouldEqual, "ohai")
+
+                                So(ris.lastReq.URL.Path, ShouldEqual, "/_ah/api/config/v1/config_sets/foo/bar/config/baz")
+                                So(ris.lastReq.Header.Get("Authorization"), ShouldEqual, "")
+                                So(ris.lastReq.Header.Get(delegation.HTTPHeaderName), ShouldEqual, "")
+                        })
+                })
+
+                Convey(`Can resolve multiple configs`, func() {
+                        ris.res = configApi.LuciConfigGetConfigMultiResponseMessage{
+                                Configs: []*configApi.LuciConfigGetConfigMultiResponseMessageConfigEntry{
+                                        {ConfigSet: "projects/foo", Content: b64("foo"), ContentHash: "####", Revision: "v1"},
+                                        {ConfigSet: "projects/bar", Content: b64("bar"), ContentHash: "####", Revision: "v1"},
+                                },
+                        }
+
+                        for _, tc := range []struct {
+                                name string
+                                t    GetAllType
+                                path string
+                        }{
+                                {"Project", Project, "/_ah/api/config/v1/configs/projects/baz"},
+                                {"Ref", Ref, "/_ah/api/config/v1/configs/refs/baz"},
+                        } {
+                                Convey(tc.name, func() {
+                                        var (
+                                                val  []string
+                                                meta []*Meta
+                                        )
+                                        So(GetAll(c, AsService, tc.t, "baz", StringSlice(&val), &meta), ShouldBeNil)
+                                        So(val, ShouldResemble, []string{"foo", "bar"})
+                                        So(meta, ShouldResemble, []*Meta{
+                                                {"projects/foo", "baz", "####", "v1"},
+                                                {"projects/bar", "baz", "####", "v1"},
+                                        })
+
+                                        So(ris.lastReq.URL.Path, ShouldEqual, tc.path)
+                                })
+                        }
+                })
+        })
+}