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// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package primitiveregistry_test
import (
"fmt"
"testing"
"github.com/google/go-cmp/cmp"
"github.com/tink-crypto/tink-go/v2/internal/primitiveregistry"
"github.com/tink-crypto/tink-go/v2/key"
)
type testParameters struct {
key.Parameters
hasIDRequirement bool
}
func (p *testParameters) HasIDRequirement() bool {
return p.hasIDRequirement
}
func (p *testParameters) Equal(other key.Parameters) bool {
otherP, ok := other.(*testParameters)
if !ok {
return false
}
return p.hasIDRequirement == otherP.hasIDRequirement
}
type testKey struct {
key.Key
params *testParameters
id uint32
}
func (k *testKey) Parameters() key.Parameters {
return k.params
}
func (k *testKey) IDRequirement() (uint32, bool) {
if k.params.HasIDRequirement() {
return k.id, true
}
return 0, false
}
func (k *testKey) Equal(other key.Key) bool {
otherK, ok := other.(*testKey)
if !ok {
return false
}
return k.id == otherK.id && k.params.Equal(otherK.params)
}
type testPrimitive struct {
ID uint32
}
type anotherTestKey struct {
key.Key
}
func (k *anotherTestKey) Parameters() key.Parameters {
return nil
}
func (k *anotherTestKey) IDRequirement() (uint32, bool) {
return 0, false
}
func (k *anotherTestKey) Equal(other key.Key) bool {
_, ok := other.(*anotherTestKey)
return ok
}
func testPrimitiveConstructor(k key.Key) (any, error) {
testK, ok := k.(*testKey)
if !ok {
return nil, fmt.Errorf("unexpected key type: %T", k)
}
id, _ := testK.IDRequirement()
return &testPrimitive{ID: id}, nil
}
func TestRegisterPrimitiveConstructorAndPrimitive_Success(t *testing.T) {
if err := primitiveregistry.RegisterPrimitiveConstructor[*testKey](testPrimitiveConstructor); err != nil {
t.Fatalf("primitiveregistry.RegisterPrimitiveConstructor() err = %v, want nil", err)
}
defer primitiveregistry.UnregisterPrimitiveConstructor[*testKey]()
k := &testKey{params: &testParameters{hasIDRequirement: true}, id: 123}
p, err := primitiveregistry.Primitive(k)
if err != nil {
t.Fatalf("primitiveregistry.Primitive() err = %v, want nil", err)
}
testP, ok := p.(*testPrimitive)
if !ok {
t.Fatalf("primitive is not of type *testPrimitive")
}
if !cmp.Equal(testP, &testPrimitive{ID: 123}) {
t.Errorf("primitiveregistry.Primitive() = %v, want %v", testP, &testPrimitive{ID: 123})
}
}
func TestRegisterPrimitiveConstructor_SameConstructorTwiceIsNoOp(t *testing.T) {
if err := primitiveregistry.RegisterPrimitiveConstructor[*testKey](testPrimitiveConstructor); err != nil {
t.Fatalf("primitiveregistry.RegisterPrimitiveConstructor() err = %v, want nil", err)
}
defer primitiveregistry.UnregisterPrimitiveConstructor[*testKey]()
if err := primitiveregistry.RegisterPrimitiveConstructor[*testKey](testPrimitiveConstructor); err != nil {
t.Fatalf("primitiveregistry.RegisterPrimitiveConstructor() err = %v, want nil", err)
}
}
func TestRegisterPrimitiveConstructor_FailsIfDifferentConstructorRegistered(t *testing.T) {
if err := primitiveregistry.RegisterPrimitiveConstructor[*testKey](testPrimitiveConstructor); err != nil {
t.Fatalf("primitiveregistry.RegisterPrimitiveConstructor() err = %v, want nil", err)
}
defer primitiveregistry.UnregisterPrimitiveConstructor[*testKey]()
anotherConstructor := func(k key.Key) (any, error) {
return nil, nil
}
if err := primitiveregistry.RegisterPrimitiveConstructor[*testKey](anotherConstructor); err == nil {
t.Fatalf("primitiveregistry.RegisterPrimitiveConstructor() err = nil, want error")
}
}
func TestPrimitive_Fails(t *testing.T) {
for _, tc := range []struct {
name string
key key.Key
}{
{
name: "anotherTestKey",
key: &anotherTestKey{},
},
{
name: "nilKey",
key: nil,
},
} {
t.Run(tc.name, func(t *testing.T) {
if _, err := primitiveregistry.Primitive(tc.key); err == nil {
t.Fatalf("primitiveregistry.Primitive() err = nil, want error")
}
})
}
}
func TestUnregisterRemovesConstructor(t *testing.T) {
if err := primitiveregistry.RegisterPrimitiveConstructor[*testKey](testPrimitiveConstructor); err != nil {
t.Fatalf("primitiveregistry.RegisterPrimitiveConstructor() err = %v, want nil", err)
}
k := &testKey{params: &testParameters{hasIDRequirement: true}, id: 123}
if _, err := primitiveregistry.Primitive(k); err != nil {
t.Fatalf("primitiveregistry.Primitive() err = %v, want nil", err)
}
primitiveregistry.UnregisterPrimitiveConstructor[*testKey]()
if _, err := primitiveregistry.Primitive(k); err == nil {
t.Fatalf("primitiveregistry.Primitive() err = nil, want error")
}
}
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