refactor: 集中显式注入并归位凭据领域规则

internal/database/domain/credential/preparation_test.go

@@ -0,0 +1,59 @@
+package credential_test
+
+import (
+	"testing"
+
+	credential "git.ddupan.top/panxiao81/ayatori/internal/database/domain/credential"
+)
+
+func TestPreparationResume(t *testing.T) {
+	for _, test := range []struct {
+		name            string
+		phase           credential.Phase
+		version         int64
+		continueAllowed bool
+		result          credential.Phase
+	}{
+		{"尚未创建", credential.Pinned, 0, true, credential.Pinned},
+		{"依赖恢复", credential.Unavailable, 0, true, credential.Unavailable},
+		{"中断创建", credential.Creating, 0, false, credential.Conflict},
+		{"未确认冲突", credential.Conflict, 0, false, credential.Conflict},
+		{"已确认后读取失败", credential.Unavailable, 1, true, credential.Unavailable},
+		{"已确认后冲突重验", credential.Conflict, 1, true, credential.Conflict},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			original := credential.State{Phase: test.phase, Version: test.version, Message: "保留原诊断"}
+			state, allowed := original.Resume()
+			if allowed != test.continueAllowed || state.Phase != test.result || state.Version != original.Version {
+				t.Fatal("恢复判定或确认版本发生变化")
+			}
+			if test.phase == credential.Conflict && state.Message != original.Message {
+				t.Fatal("冲突重入应保留原诊断")
+			}
+		})
+	}
+}
+
+func TestPreparationLocationAndConfirmation(t *testing.T) {
+	location := credential.Location{Mount: "applications", Path: "database/uid"}
+	state := credential.State{Location: &location, Phase: credential.Creating}
+	if issue := state.CheckLocation(location); issue != nil {
+		t.Fatal("固定位置不应被拒绝")
+	}
+	if issue := state.CheckLocation(credential.Location{Mount: "other", Path: location.Path}); issue == nil || issue.Phase != credential.Unavailable {
+		t.Fatal("配置变化必须停止，不迁移已固定位置")
+	}
+	for _, version := range []int64{0, -1, 2} {
+		result, issue := state.Created(version)
+		if issue == nil || issue.Phase != credential.Conflict || result.Confirmed() {
+			t.Fatal("错误版本不得确认创建")
+		}
+	}
+	result, issue := state.Created(1)
+	if issue != nil || !result.Confirmed() || result.Phase != credential.Prepared || result.Location != state.Location {
+		t.Fatal("首次写入回读应确认并保留位置")
+	}
+	if state.Version != 0 {
+		t.Fatal("领域判定不得修改调用方的旧状态")
+	}
+}