250 lines
8.0 KiB
Go
250 lines
8.0 KiB
Go
/*
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Copyright 2026.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package application
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import (
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"context"
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"errors"
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"testing"
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"git.ddupan.top/panxiao81/ayatori/internal/database/domain/instance"
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)
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const serviceTestPassword = "test-only"
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// 延续源项目 Service 测试，用于穷举身份与装配失败；真实行为由 adapter 集成测试验证。
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type sourceStub struct {
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credentials Credentials
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err error
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}
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func (s *sourceStub) Read(context.Context, instance.CredentialReference) (Credentials, error) {
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return s.credentials, s.err
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}
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type databaseStub struct {
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closes int
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err error
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metadata DatabaseMetadata
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}
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func (d *databaseStub) InspectMetadata(context.Context) (DatabaseMetadata, error) {
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return d.metadata, d.err
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}
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func (d *databaseStub) Close() {
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d.closes++
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}
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type connectorStub struct {
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databases []*databaseStub
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err error
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}
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func (c *connectorStub) Connect(context.Context, instance.Endpoint, Credentials) (Database, error) {
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if c.err != nil {
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return nil, c.err
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}
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db := &databaseStub{
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metadata: DatabaseMetadata{
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Version: "17",
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AvailableExtensions: []string{"plpgsql"},
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},
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}
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c.databases = append(c.databases, db)
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return db, nil
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}
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func serviceTarget(t *testing.T, uid, host, secret string, generation int64) instance.ObservationTarget {
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t.Helper()
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id, err := instance.NewIdentity(uid, "shared")
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if err != nil {
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t.Fatal(err)
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}
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revision, err := instance.NewRevision(generation)
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if err != nil {
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t.Fatal(err)
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}
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endpoint, err := instance.NewEndpoint(instance.EndpointValues{
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Host: host,
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HostAddr: "127.0.0.1",
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Port: 5432,
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ManagementDatabase: "postgres",
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TLSMode: instance.TLSDisable,
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})
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if err != nil {
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t.Fatal(err)
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}
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ref, err := instance.NewCredentialReference(instance.CredentialReferenceValues{
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Name: secret,
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UsernameKey: "user",
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PasswordKey: "pass",
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})
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if err != nil {
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t.Fatal(err)
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}
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definition, err := instance.NewDefinition(endpoint, ref)
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if err != nil {
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t.Fatal(err)
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}
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target, err := instance.NewObservationTarget(id, revision, definition)
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if err != nil {
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t.Fatal(err)
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}
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return target
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}
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func TestInstanceConnectionIdentity(t *testing.T) {
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source := &sourceStub{credentials: Credentials{username: testUsername, password: serviceTestPassword}}
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connector := &connectorStub{}
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service, err := NewInstanceService(source, connector)
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if err != nil {
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t.Fatal(err)
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}
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defer service.Close()
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ctx := context.Background()
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cases := []struct {
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name string
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target instance.ObservationTarget
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wantConnections int
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}{
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{"initial connection", serviceTarget(t, "uid-1", "first", "admin", 1), 1},
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{"generation alone", serviceTarget(t, "uid-1", "first", "admin", 2), 1},
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{"endpoint changed", serviceTarget(t, "uid-1", "second", "admin", 3), 2},
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{"reference changed", serviceTarget(t, "uid-1", "second", "replacement", 4), 3},
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{"same name with new UID", serviceTarget(t, "uid-2", "second", "replacement", 1), 4},
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}
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for _, testCase := range cases {
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observation, err := service.ObserveMetadata(ctx, testCase.target)
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if err != nil {
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t.Fatal(err)
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}
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if !observation.Target().Matches(testCase.target) {
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t.Fatalf("%s: observation was bound to a previous target", testCase.name)
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}
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if len(connector.databases) != testCase.wantConnections {
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t.Fatalf("%s: got %d connections, want %d", testCase.name, len(connector.databases), testCase.wantConnections)
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}
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}
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for _, db := range connector.databases[:3] {
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if db.closes != 1 {
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t.Fatal("replaced connection not closed exactly once")
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}
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}
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service.Forget("shared")
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service.Forget("shared")
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if connector.databases[3].closes != 1 {
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t.Fatal("forget did not close exactly once")
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}
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}
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func TestMetadataObservationFreshnessAndFailure(t *testing.T) {
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source := &sourceStub{credentials: Credentials{username: testUsername, password: serviceTestPassword}}
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connector := &connectorStub{}
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service, err := NewInstanceService(source, connector)
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if err != nil {
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t.Fatal(err)
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}
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defer service.Close()
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ctx := context.Background()
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target := serviceTarget(t, "metadata-uid", "first", "admin", 1)
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observed, err := service.ObserveMetadata(ctx, target)
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if err != nil || observed.Version() != "17" || !observed.Target().Matches(target) {
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t.Fatalf("metadata observation: %v", err)
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}
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requested := instance.NewExtensionSet([]string{"plpgsql"})
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if observed.Extensions().Check(requested).Decision != instance.ExtensionsAccepted {
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t.Fatal("extension list was not observed")
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}
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// 连接可以复用，但每轮必须重新查询；旧观察还必须与 adapter 的可变 slice 脱离。
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database := connector.databases[0]
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database.metadata.AvailableExtensions[0] = "replacement"
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if observed.Extensions().Check(requested).Decision != instance.ExtensionsAccepted {
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t.Fatal("adapter mutation changed a completed observation")
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}
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refreshed, err := service.ObserveMetadata(ctx, target)
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if err != nil || refreshed.Extensions().Check(requested).Decision != instance.ExtensionsUnsupported {
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t.Fatalf("extension list was cached across observations: %v", err)
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}
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database.metadata.AvailableExtensions = nil
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empty, err := service.ObserveMetadata(ctx, target)
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if err != nil || empty.Extensions().Check(requested).Decision != instance.ExtensionsUnsupported {
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t.Fatalf("successful empty list was treated as unobserved: %v", err)
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}
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// 即使 adapter 附带部分数据，错误仍使整个观察失效。
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database.err = ErrObservation
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failed, err := service.ObserveMetadata(ctx, target)
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if !errors.Is(err, ErrObservation) || failed.Version() != "" || failed.Target().Validate() == nil {
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t.Fatal("failed query returned a bound observation")
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}
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if failed.Extensions().Check(requested).Decision != instance.ExtensionSupportUnobserved {
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t.Fatal("failed query was interpreted as an empty extension list")
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}
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if _, err := service.ObserveMetadata(ctx, target); err != nil {
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t.Fatalf("retry after query failure: %v", err)
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}
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connector.databases[1].metadata.Version = ""
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if _, err := service.ObserveMetadata(ctx, target); !errors.Is(err, ErrObservation) {
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t.Fatal("missing server version was accepted as complete metadata")
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}
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}
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func TestInstanceAssemblyFailureRecovery(t *testing.T) {
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ctx := context.Background()
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target := serviceTarget(t, "uid-1", "first", "admin", 1)
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source := &sourceStub{
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credentials: Credentials{username: testUsername, password: serviceTestPassword},
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err: errors.New("unsafe source error"),
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}
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connector := &connectorStub{err: ErrConnection}
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service, err := NewInstanceService(source, connector)
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if err != nil {
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t.Fatal(err)
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}
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defer service.Close()
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if version, err := service.ObserveVersion(ctx, target); version != "" || !errors.Is(err, ErrCredentialsUnavailable) {
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t.Fatal("unsafe source error escaped")
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}
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source.err = nil
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if version, err := service.ObserveVersion(ctx, target); version != "" || !errors.Is(err, ErrConnection) {
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t.Fatal("connection failure returned evidence")
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}
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connector.err = nil
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if _, err := service.ObserveVersion(ctx, target); err != nil {
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t.Fatal(err)
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}
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connector.databases[0].err = ErrObservation
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if version, err := service.ObserveVersion(ctx, target); version != "" || !errors.Is(err, ErrObservation) {
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t.Fatal("failed query returned evidence")
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}
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if connector.databases[0].closes != 1 {
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t.Fatal("failed connection retained")
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}
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if _, err := service.ObserveVersion(ctx, target); err != nil {
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t.Fatal("retry failed", err)
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}
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service.Close()
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service.Close()
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if connector.databases[1].closes != 1 {
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t.Fatal("shutdown did not close once")
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}
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if _, err := service.ObserveVersion(ctx, target); !errors.Is(err, ErrClosed) {
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t.Fatal("closed service accepted work")
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}
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}
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