Split off serialization and key functions to their own packages.

service/datastore/key_test.go

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package datastore
-
-import (
-        "encoding/json"
-        "fmt"
-        "testing"
-
-        . "github.com/smartystreets/goconvey/convey"
-)
-
-func mkKey(aid, ns string, elems ...interface{}) Key {
-        if len(elems)%2 != 0 {
-                panic("odd number of tokens")
-        }
-        toks := make([]KeyTok, len(elems)/2)
-        for i := 0; i < len(elems); i += 2 {
-                toks[i/2].Kind = elems[i].(string)
-                switch x := elems[i+1].(type) {
-                case string:
-                        toks[i/2].StringID = x
-                case int:
-                        toks[i/2].IntID = int64(x)
-                default:
-                        panic("bad token id")
-                }
-        }
-        return NewKeyToks(aid, ns, toks)
-}
-
-func ShouldEqualKey(actual interface{}, expected ...interface{}) string {
-        if len(expected) != 1 {
-                return fmt.Sprintf("Assertion requires 1 expected value, got %d", len(expected))
-        }
-        if KeysEqual(actual.(Key), expected[0].(Key)) {
-                return ""
-        }
-        return fmt.Sprintf("Expected: %q\nActual: %q", actual, expected[0])
-}
-
-func TestKeyEncode(t *testing.T) {
-        t.Parallel()
-
-        keys := []Key{
-                mkKey("appid", "ns", "kind", 1),
-                mkKey("appid", "ns", "nerd", "moo"),
-                mkKey("appid", "ns", "parent", 10, "renerd", "moo"),
-        }
-
-        Convey("Key Round trip", t, func() {
-                for _, k := range keys {
-                        k := k
-                        Convey(k.String(), func() {
-                                enc := KeyEncode(k)
-                                aid, ns, toks, err := KeyToksDecode(enc)
-                                So(err, ShouldBeNil)
-                                dec := NewKeyToks(aid, ns, toks)
-                                So(dec, ShouldNotBeNil)
-                                So(dec, ShouldEqualKey, k)
-
-                                dec2, err := NewKeyFromEncoded(enc)
-                                So(err, ShouldBeNil)
-                                So(dec2, ShouldEqualKey, dec)
-                                So(dec2, ShouldEqualKey, k)
-                        })
-
-                        Convey(k.String()+" (json)", func() {
-                                data, err := KeyMarshalJSON(k)
-                                So(err, ShouldBeNil)
-
-                                aid, ns, toks, err := KeyUnmarshalJSON(data)
-                                So(err, ShouldBeNil)
-                                So(NewKeyToks(aid, ns, toks), ShouldEqualKey, k)
-                        })
-                }
-        })
-
-        Convey("NewKey", t, func() {
-                Convey("single", func() {
-                        k := NewKey("appid", "ns", "kind", "", 1, nil)
-                        So(k, ShouldEqualKey, keys[0])
-                })
-
-                Convey("nest", func() {
-                        k := NewKey("appid", "ns", "renerd", "moo", 0,
-                                NewKey("appid", "ns", "parent", "", 10, nil))
-                        So(k, ShouldEqualKey, keys[2])
-                })
-        })
-
-        Convey("Key bad encoding", t, func() {
-                Convey("extra junk before", func() {
-                        enc := KeyEncode(keys[2])
-                        _, _, _, err := KeyToksDecode("/" + enc)
-                        So(err, ShouldErrLike, "illegal base64")
-                })
-
-                Convey("extra junk after", func() {
-                        enc := KeyEncode(keys[2])
-                        _, _, _, err := KeyToksDecode(enc[:len(enc)-1])
-                        So(err, ShouldErrLike, "EOF")
-                })
-
-                Convey("json encoding includes quotes", func() {
-                        data, err := KeyMarshalJSON(keys[0])
-                        So(err, ShouldBeNil)
-
-                        _, _, _, err = KeyUnmarshalJSON(append(data, '!'))
-                        So(err, ShouldErrLike, "bad JSON key")
-                })
-        })
-}
-
-type dumbKey1 struct{ Key }
-
-func (dk dumbKey1) Namespace() string { return "ns" }
-func (dk dumbKey1) Parent() Key       { return dk.Key }
-func (dk dumbKey1) String() string    { return "dumbKey1" }
-
-type dumbKey2 struct{ Key }
-
-/// This is the dumb part... can't have both IDs set.
-func (dk dumbKey2) IntID() int64     { return 1 }
-func (dk dumbKey2) StringID() string { return "wat" }
-
-func (dk dumbKey2) Kind() string      { return "kind" }
-func (dk dumbKey2) Parent() Key       { return nil }
-func (dk dumbKey2) Namespace() string { return "ns" }
-func (dk dumbKey2) AppID() string     { return "aid" }
-func (dk dumbKey2) String() string    { return "dumbKey2" }
-
-func TestBadKeyEncode(t *testing.T) {
-        t.Parallel()
-
-        Convey("bad keys", t, func() {
-                Convey("incomplete", func() {
-                        So(KeyIncomplete(mkKey("aid", "ns", "kind", 1)), ShouldBeFalse)
-                        So(KeyIncomplete(mkKey("aid", "ns", "kind", 0)), ShouldBeTrue)
-                })
-
-                Convey("invalid", func() {
-                        So(KeyValid(mkKey("aid", "ns", "hat", "face", "__kind__", 1), true, "aid", "ns"), ShouldBeTrue)
-
-                        bads := []Key{
-                                nil,
-                                mkKey("", "ns", "hat", "face"),
-                                mkKey("aid", "ns", "base", 1, "", "id"),
-                                mkKey("aid", "ns", "hat", "face", "__kind__", 1),
-                                mkKey("aid", "ns", "hat", 0, "kind", 1),
-                                dumbKey1{mkKey("aid", "badNS", "hat", 1)},
-                                dumbKey2{},
-                        }
-                        for _, k := range bads {
-                                s := "<nil>"
-                                if k != nil {
-                                        s = k.String()
-                                }
-                                Convey(s, func() {
-                                        So(KeyValid(k, false, "aid", "ns"), ShouldBeFalse)
-                                })
-                        }
-                })
-        })
-}
-
-type keyWrap struct{ Key }
-
-func (k keyWrap) Parent() Key {
-        if k.Key.Parent() != nil {
-                return keyWrap{k.Key.Parent()}
-        }
-        return nil
-}
-
-func TestMiscKey(t *testing.T) {
-        t.Parallel()
-
-        Convey("KeyRoot", t, func() {
-                k := mkKey("appid", "ns", "parent", 10, "renerd", "moo")
-                r := mkKey("appid", "ns", "parent", 10)
-                So(KeyRoot(k), ShouldEqualKey, r)
-                So(KeyRoot(nil), ShouldBeNil)
-        })
-
-        Convey("KeySplit", t, func() {
-                // keyWrap forces KeySplit to not take the GenericKey shortcut.
-                k := keyWrap{mkKey("appid", "ns", "parent", 10, "renerd", "moo")}
-                aid, ns, toks := KeySplit(k)
-                So(aid, ShouldEqual, "appid")
-                So(ns, ShouldEqual, "ns")
-                So(toks, ShouldResemble, []KeyTok{
-                        {Kind: "parent", IntID: 10},
-                        {Kind: "renerd", StringID: "moo"},
-                })
-        })
-
-        Convey("KeySplit (nil)", t, func() {
-                aid, ns, toks := KeySplit(nil)
-                So(aid, ShouldEqual, "")
-                So(ns, ShouldEqual, "")
-                So(toks, ShouldResemble, []KeyTok(nil))
-        })
-
-        Convey("KeySplit ((*GenericKey)(nil))", t, func() {
-                aid, ns, toks := KeySplit((*GenericKey)(nil))
-                So(aid, ShouldEqual, "")
-                So(ns, ShouldEqual, "")
-                So(toks, ShouldResemble, []KeyTok(nil))
-        })
-
-        Convey("KeysEqual", t, func() {
-                k1 := mkKey("a", "n", "knd", 1)
-                k2 := mkKey("a", "n", "knd", 1)
-                So(KeysEqual(k1, k2), ShouldBeTrue)
-                k3 := mkKey("a", "n", "knd", 2)
-                So(KeysEqual(k1, k3), ShouldBeFalse)
-        })
-
-        Convey("KeyString", t, func() {
-                k1 := mkKey("a", "n", "knd", 1, "other", "wat")
-                So(KeyString(k1), ShouldEqual, "/knd,1/other,wat")
-                So(KeyString(nil), ShouldEqual, "")
-        })
-
-        Convey("*GenericKey supports json encoding", t, func() {
-                type TestStruct struct {
-                        Key *GenericKey
-                }
-                t := &TestStruct{
-                        NewKey("aid", "ns", "kind", "id", 0,
-                                NewKey("aid", "ns", "parent", "", 1, nil),
-                        )}
-                d, err := json.Marshal(t)
-                So(err, ShouldBeNil)
-                t2 := &TestStruct{}
-                err = json.Unmarshal(d, t2)
-                So(err, ShouldBeNil)
-                So(t, ShouldResemble, t2)
-        })
-}