🐛 fix(test): 修复后端测试环境与跨平台隔离

internal/ai/provider/claude_cli_test.go

@@ -676,12 +676,11 @@ func assertClaudeCLIRuntimeErrorIsEnglish(t *testing.T, message string) {
 }
 
 func TestClaudeCLIProvider_ChatStreamAllowsDelayedMeaningfulResponse(t *testing.T) {
-	fakeClaude := writeFakeClaudeScript(t, "#!/bin/sh\necho '{\"type\":\"system\",\"subtype\":\"init\"}'\nsleep 0.2\necho '{\"type\":\"assistant\",\"message\":{\"content\":[{\"type\":\"text\",\"text\":\"OK\"}]}}'\necho '{\"type\":\"result\",\"subtype\":\"success\",\"is_error\":false,\"result\":\"OK\"}'\n")
-	restore := overrideClaudeCLIForTest(t, fakeClaude)
+	restore := overrideClaudeCLIWithTestProcess(t, "delayed-stream-success")
 	defer restore()
 
 	originalRequestTimeout := claudeCLIRequestTimeout
-	claudeCLIRequestTimeout = 1 * time.Second
+	claudeCLIRequestTimeout = 5 * time.Second
 	defer func() {
 		claudeCLIRequestTimeout = originalRequestTimeout
 	}()
@@ -960,6 +959,12 @@ func TestClaudeCLIHelperProcess(t *testing.T) {
 	case "model-success":
 		_, _ = os.Stdout.WriteString(`{"type":"result","subtype":"success","is_error":false,"result":"model request should not run"}`)
 		os.Exit(0)
+	case "delayed-stream-success":
+		_, _ = os.Stdout.WriteString("{\"type\":\"system\",\"subtype\":\"init\"}\n")
+		time.Sleep(200 * time.Millisecond)
+		_, _ = os.Stdout.WriteString("{\"type\":\"assistant\",\"message\":{\"content\":[{\"type\":\"text\",\"text\":\"OK\"}]}}\n")
+		_, _ = os.Stdout.WriteString("{\"type\":\"result\",\"subtype\":\"success\",\"is_error\":false,\"result\":\"OK\"}\n")
+		os.Exit(0)
 	case "sleep":
 		time.Sleep(5 * time.Second)
 		os.Exit(0)

internal/ai/service/claude_code_mcp.go

@@ -503,6 +503,9 @@ func readClaudeCodeMCPServerConfig(configPath string, serverID string, textFuncs
 
 func upsertClaudeCodeMCPServerConfig(configPath string, serverID string, serverConfig claudeCodeMCPServerConfig, textFuncs ...mcpClientInstallTextFunc) error {
 	text := firstMCPClientInstallText(textFuncs)
+	if err := os.MkdirAll(filepath.Dir(configPath), 0o755); err != nil {
+		return fmt.Errorf("%s", mcpClientInstallText(text, "ai.service.mcp_client.claude_code.config_dir_create_failed", map[string]any{"detail": err.Error()}))
+	}
 	root, err := readClaudeCodeConfig(configPath, text)
 	if err != nil {
 		return err
@@ -526,9 +529,6 @@ func upsertClaudeCodeMCPServerConfig(configPath string, serverID string, serverC
 		return fmt.Errorf("%s", mcpClientInstallText(text, "ai.service.mcp_client.claude_code.config_serialize_failed", map[string]any{"detail": err.Error()}))
 	}
 
-	if err := os.MkdirAll(filepath.Dir(configPath), 0o755); err != nil {
-		return fmt.Errorf("%s", mcpClientInstallText(text, "ai.service.mcp_client.claude_code.config_dir_create_failed", map[string]any{"detail": err.Error()}))
-	}
 	if err := os.WriteFile(configPath, append(data, '\n'), 0o644); err != nil {
 		return fmt.Errorf("%s", mcpClientInstallText(text, "ai.service.mcp_client.claude_code.config_write_failed", map[string]any{"detail": err.Error()}))
 	}
@@ -593,15 +593,15 @@ func readCodexMCPServerConfig(configPath string, serverID string, textFuncs ...m
 
 func upsertCodexMCPServerConfig(configPath string, serverID string, serverConfig codexMCPServerConfig, textFuncs ...mcpClientInstallTextFunc) error {
 	text := firstMCPClientInstallText(textFuncs)
+	if err := os.MkdirAll(filepath.Dir(configPath), 0o755); err != nil {
+		return fmt.Errorf("%s", mcpClientInstallText(text, "ai.service.mcp_client.codex.config_dir_create_failed", map[string]any{"detail": err.Error()}))
+	}
 	data, err := os.ReadFile(configPath)
 	if err != nil && !os.IsNotExist(err) {
 		return fmt.Errorf("%s", mcpClientInstallText(text, "ai.service.mcp_client.codex.config_read_failed", map[string]any{"detail": err.Error()}))
 	}
 
 	updated := replaceOrAppendCodexMCPServerBlock(string(data), strings.TrimSpace(serverID), renderCodexMCPServerBlock(serverID, serverConfig))
-	if err := os.MkdirAll(filepath.Dir(configPath), 0o755); err != nil {
-		return fmt.Errorf("%s", mcpClientInstallText(text, "ai.service.mcp_client.codex.config_dir_create_failed", map[string]any{"detail": err.Error()}))
-	}
 	if err := os.WriteFile(configPath, []byte(updated), 0o644); err != nil {
 		return fmt.Errorf("%s", mcpClientInstallText(text, "ai.service.mcp_client.codex.config_write_failed", map[string]any{"detail": err.Error()}))
 	}

internal/ai/service/service.go

@@ -2056,7 +2056,17 @@ func (s *Service) loadSessionFile(sessionID string) (sessionFileData, error) {
 	return sessionData, nil
 }
 
+func (s *Service) ensureSessionsDir() error {
+	if err := os.MkdirAll(s.sessionsDir(), 0o755); err != nil {
+		return s.serviceError("ai_service.backend.error.sessions_dir_create_failed", nil, err)
+	}
+	return nil
+}
+
 func (s *Service) loadOrCreateSessionFile(sessionID string) (sessionFileData, error) {
+	if err := s.ensureSessionsDir(); err != nil {
+		return sessionFileData{}, err
+	}
 	sessionData, err := s.loadSessionFile(sessionID)
 	if err == nil {
 		return sessionData, nil
@@ -2073,9 +2083,8 @@ func (s *Service) loadOrCreateSessionFile(sessionID string) (sessionFileData, er
 }
 
 func (s *Service) saveSessionFile(sessionID string, sessionData sessionFileData) error {
-	dir := s.sessionsDir()
-	if err := os.MkdirAll(dir, 0o755); err != nil {
-		return s.serviceError("ai_service.backend.error.sessions_dir_create_failed", nil, err)
+	if err := s.ensureSessionsDir(); err != nil {
+		return err
 	}
 	if strings.TrimSpace(sessionData.ID) == "" {
 		sessionData.ID = sessionID

internal/app/methods_db_audited_test.go

@@ -133,6 +133,7 @@ func TestDirectDBQueryCannotBypassWriteAuditWhenBatchStartsWithRead(t *testing.T
 }
 
 func TestDirectDBQueryCannotBypassAuditWithNestedWriteSyntax(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	originalVerifyDriverAgentRevisionFunc := verifyDriverAgentRevisionFunc
 	t.Cleanup(func() {

internal/app/methods_db_i18n_test.go

@@ -196,6 +196,9 @@ func TestMethodsDBConnectionValidationAndReleaseUseEnglishMessages(t *testing.T)
 func TestMethodsDBConnectUsesCurrentLanguageForDriverRuntimeReason(t *testing.T) {
 	tmpDir := t.TempDir()
 	db.SetExternalDriverDownloadDirectory(tmpDir)
+	t.Cleanup(func() {
+		db.SetExternalDriverDownloadDirectory("")
+	})
 
 	app := NewAppWithSecretStore(newFakeAppSecretStore())
 	app.configDir = tmpDir

internal/app/methods_db_metadata_retry_test.go

@@ -232,6 +232,7 @@ func TestDBGetIndexesUsesSearchPathForPostgresPureTableMetadata(t *testing.T) {
 }
 
 func TestDBGetColumnsKeepsCurrentDatabaseForKingbaseQualifiedTableMetadata(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	originalResolveDialConfigWithProxyFunc := resolveDialConfigWithProxyFunc
 	t.Cleanup(func() {
@@ -270,6 +271,7 @@ func TestDBGetColumnsKeepsCurrentDatabaseForKingbaseQualifiedTableMetadata(t *te
 }
 
 func TestDBGetIndexesKeepsCurrentDatabaseForKingbaseQualifiedTableMetadata(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	originalResolveDialConfigWithProxyFunc := resolveDialConfigWithProxyFunc
 	t.Cleanup(func() {
@@ -342,6 +344,7 @@ func TestDBGetColumnsKeepsDatabaseForMySQLMetadata(t *testing.T) {
 }
 
 func TestDBGetColumnsInfersOceanBaseOracleFieldsWhenAgentMetadataIsEmpty(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	originalResolveDialConfigWithProxyFunc := resolveDialConfigWithProxyFunc
 	t.Cleanup(func() {
@@ -422,6 +425,7 @@ func TestDBGetColumnsInfersOceanBaseOracleFieldsWhenAgentMetadataIsEmpty(t *test
 }
 
 func TestDBGetColumnsFallsBackToEmptySelectWhenOceanBaseOracleDictionaryIsEmpty(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	originalResolveDialConfigWithProxyFunc := resolveDialConfigWithProxyFunc
 	t.Cleanup(func() {

internal/app/methods_db_multi_test.go

@@ -796,6 +796,7 @@ var _ db.QueryMessageExecer = (*fakeBatchWriteDB)(nil)
 var _ db.StatementQueryMessageExecer = (*fakeBatchWriteSession)(nil)
 
 func TestDBQueryWithCancelReturnsResultSetForExecStoredProcedure(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -907,6 +908,7 @@ func TestDBQueryWithCancelRoutesMilvusSelectPreviewToQuery(t *testing.T) {
 }
 
 func TestDBQueryWithCancelReturnsMessagesForSQLServerQuery(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -942,6 +944,7 @@ func TestDBQueryWithCancelReturnsMessagesForSQLServerQuery(t *testing.T) {
 }
 
 func TestDBQueryWithCancel_DuckDBQueriesDoNotInheritConnectTimeout(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	originalVerifyDriverAgentRevisionFunc := verifyDriverAgentRevisionFunc
 	t.Cleanup(func() {
@@ -1113,6 +1116,7 @@ func TestDBQueryMultiTransactionalKeepsDMLTransactionOpenUntilCommit(t *testing.
 }
 
 func TestDBQueryMultiTransactionalKeepsSQLServerBeginEndBlockOpenUntilRollback(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -1492,6 +1496,7 @@ func TestDBQueryMultiTransactionalOraclePrefersTransactionProviderForFinish(t *t
 }
 
 func TestDBQueryMultiTransactionalUsesOracleImplicitSessionForOceanBaseOracleProtocol(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	originalVerifyDriverAgentRevisionFunc := verifyDriverAgentRevisionFunc
 	t.Cleanup(func() {
@@ -1865,6 +1870,7 @@ func TestDBQueryMultiTransactionalSkipsManagedTransactionForExplicitTransactionS
 }
 
 func TestDBQueryMultiPrefersResultSetForExecStoredProcedure(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -1909,6 +1915,7 @@ func TestDBQueryMultiPrefersResultSetForExecStoredProcedure(t *testing.T) {
 }
 
 func TestDBQueryMultiDoesNotBatchExecStoredProcedureAsWriteStatement(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -1953,6 +1960,7 @@ func TestDBQueryMultiDoesNotBatchExecStoredProcedureAsWriteStatement(t *testing.
 }
 
 func TestDBQueryMultiRunsSQLServerStatisticsBatchNatively(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -2019,6 +2027,7 @@ func TestDBQueryMultiRunsSQLServerStatisticsBatchNatively(t *testing.T) {
 }
 
 func TestDBQueryMultiFallsBackWhenNativeReadOnlyBatchReturnsEmptyResults(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -2248,6 +2257,7 @@ func TestDBQueryMultiFallsBackToPlainQueryWhenSequentialMultiStillReturnsBlankRe
 }
 
 func TestDBQueryMultiPrefersPlainQueryForKingbaseReadResults(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -2370,6 +2380,7 @@ func TestDBQueryMultiPrefersPlainQueryForDamengReadResults(t *testing.T) {
 }
 
 func TestDBQueryMultiPrefersPlainQueryForOceanBaseOracleReadResults(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -2437,6 +2448,7 @@ func TestDBQueryMultiPrefersPlainQueryForOceanBaseOracleReadResults(t *testing.T
 }
 
 func TestDBQueryMultiUsesPinnedSessionForSequentialFallback(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -2498,6 +2510,7 @@ func TestDBQueryMultiUsesPinnedSessionForSequentialFallback(t *testing.T) {
 }
 
 func TestDBQueryMultiKeepsAllResultSetsFromSingleSQLServerStatement(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -2552,6 +2565,7 @@ func TestDBQueryMultiKeepsAllResultSetsFromSingleSQLServerStatement(t *testing.T
 }
 
 func TestDBQueryMultiNormalizesSingleSQLServerSelectAffectedRowsStatementIndex(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -2597,6 +2611,7 @@ func TestDBQueryMultiNormalizesSingleSQLServerSelectAffectedRowsStatementIndex(t
 }
 
 func TestDBQueryMultiNormalizesSQLServerSelectAffectedRowsPairsByStatement(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -2672,6 +2687,7 @@ func TestNormalizeNativeResultStatementIndexesKeepsAmbiguousSQLServerResultsUnas
 }
 
 func TestDBQueryMultiTreatsBareSQLServerProcedureCallAsQueryFirst(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -2767,6 +2783,7 @@ func TestDBQueryMultiTreatsReturningWriteAsQueryFirst(t *testing.T) {
 }
 
 func TestDBQueryMultiTreatsSQLServerOutputWriteAsQueryFirst(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc
@@ -2814,6 +2831,7 @@ func TestDBQueryMultiTreatsSQLServerOutputWriteAsQueryFirst(t *testing.T) {
 }
 
 func TestDBQueryMultiTreatsWrappedMessageBlocksAsQueryFirst(t *testing.T) {
+	installFakeOptionalDriverRuntime(t)
 	originalNewDatabaseFunc := newDatabaseFunc
 	t.Cleanup(func() {
 		newDatabaseFunc = originalNewDatabaseFunc

internal/app/methods_driver_i18n_test.go

@@ -132,7 +132,7 @@ func TestMethodsDriverReleaseHelpersUseLocalizedText(t *testing.T) {
 				"driver_manager.backend.error.driver_version_list_parse_failed",
 			},
 		},
-		"func fetchDriverBundleAssetSizeIndex": {
+		"func fetchDriverBundleAssetIndex": {
 			rawMessages: []string{
 				`fmt.Errorf("release 为空")`,
 				`fmt.Errorf("未找到驱动总包索引资产")`,

internal/app/methods_driver_test_helpers_test.go

@@ -4,6 +4,8 @@ import (
 	"os"
 	"strings"
 	"testing"
+
+	"GoNavi-Wails/internal/connection"
 )
 
 func methodsDriverSource(t *testing.T) string {
@@ -24,6 +26,19 @@ func methodsDriverSource(t *testing.T) string {
 	return strings.Join(parts, "\n\n")
 }
 
+func installFakeOptionalDriverRuntime(t *testing.T) {
+	t.Helper()
+
+	originalDriverRuntimeSupportStatusFunc := driverRuntimeSupportStatusFunc
+	originalVerifyDriverAgentRevisionFunc := verifyDriverAgentRevisionFunc
+	driverRuntimeSupportStatusFunc = func(string) (bool, string) { return true, "" }
+	verifyDriverAgentRevisionFunc = func(connection.ConnectionConfig) error { return nil }
+	t.Cleanup(func() {
+		driverRuntimeSupportStatusFunc = originalDriverRuntimeSupportStatusFunc
+		verifyDriverAgentRevisionFunc = originalVerifyDriverAgentRevisionFunc
+	})
+}
+
 func disableGlobalProxyForTest(t *testing.T) {
 	t.Helper()
 

internal/app/methods_driver_version_test.go

@@ -294,6 +294,8 @@ func TestDriverReleaseDownloadCoordinates(t *testing.T) {
 }
 
 func TestFetchDriverReleaseIndexByURLBuildsMirrorAssets(t *testing.T) {
+	disableGlobalProxyForTest(t)
+
 	for _, name := range []string{
 		"HTTP_PROXY", "HTTPS_PROXY", "ALL_PROXY",
 		"http_proxy", "https_proxy", "all_proxy",

internal/app/methods_jvm_test.go

@@ -103,6 +103,14 @@ func expectedAuditAppendError(t *testing.T, auditRoot string) string {
 	return err.Error()
 }
 
+func setJVMTestLanguage(t *testing.T, app *App, language string) {
+	t.Helper()
+	app.SetLanguage(language)
+	t.Cleanup(func() {
+		app.SetLanguage("zh-CN")
+	})
+}
+
 func assertEnglishJVMConfirmationMessage(t *testing.T, got string, want string) {
 	t.Helper()
 
@@ -118,7 +126,7 @@ func assertEnglishJVMConfirmationMessage(t *testing.T, got string, want string)
 
 func TestTestJVMConnectionUsesPreferredProvider(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	var gotMode string
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
 		gotMode = mode
@@ -172,6 +180,7 @@ func TestTestJVMConnectionReturnsProviderError(t *testing.T) {
 
 func TestTestJVMConnectionTranslatesJMXBusinessPortError(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
+	setJVMTestLanguage(t, app, "zh-CN")
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
 		return fakeJVMProvider{testErr: errors.New("jmx test connection failed: jmx helper ping failed for localhost:18080: JMX command ping failed for localhost:18080: Failed to retrieve RMIServer stub: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: non-JRMP server at remote endpoint]; details={\"exception\":\"java.lang.IllegalStateException\"}")}, nil
 	})
@@ -203,10 +212,7 @@ func TestTestJVMConnectionTranslatesJMXBusinessPortError(t *testing.T) {
 
 func TestTestJVMConnectionLocalizesJMXBusinessPortErrorInEnglish(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
-	t.Cleanup(func() {
-		app.SetLanguage("zh-CN")
-	})
+	setJVMTestLanguage(t, app, "en-US")
 
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
 		return fakeJVMProvider{testErr: errors.New("jmx test connection failed: jmx helper ping failed for localhost:18080: JMX command ping failed for localhost:18080: Failed to retrieve RMIServer stub: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: non-JRMP server at remote endpoint]; details={\"exception\":\"java.lang.IllegalStateException\"}")}, nil
@@ -239,6 +245,7 @@ func TestTestJVMConnectionLocalizesJMXBusinessPortErrorInEnglish(t *testing.T) {
 
 func TestTestJVMConnectionTranslatesAgentConnectionRefused(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
+	setJVMTestLanguage(t, app, "zh-CN")
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
 		return fakeJVMProvider{testErr: errors.New("agent probe request failed: Get \"http://127.0.0.1:19090/gonavi/agent/jvm\": dial tcp 127.0.0.1:19090: connect: connection refused")}, nil
 	})
@@ -266,10 +273,7 @@ func TestTestJVMConnectionTranslatesAgentConnectionRefused(t *testing.T) {
 
 func TestTestJVMConnectionLocalizesAgentConnectionRefusedInEnglish(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
-	t.Cleanup(func() {
-		app.SetLanguage("zh-CN")
-	})
+	setJVMTestLanguage(t, app, "en-US")
 
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
 		return fakeJVMProvider{testErr: errors.New("agent probe request failed: Get \"http://127.0.0.1:19090/gonavi/agent/jvm\": dial tcp 127.0.0.1:19090: connect: connection refused")}, nil
@@ -301,7 +305,7 @@ func TestTestJVMConnectionLocalizesAgentConnectionRefusedInEnglish(t *testing.T)
 
 func TestTestJVMConnectionLocalizesEndpointErrorInEnglish(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
 		return fakeJVMProvider{testErr: errors.New(`endpoint baseurl is invalid: parse ":bad-url": missing protocol scheme`)}, nil
@@ -414,7 +418,7 @@ func TestJVMProbeCapabilitiesIncludesReasonWhenProbeFails(t *testing.T) {
 
 func TestJVMProbeCapabilitiesLocalizesBuiltInReadOnlyReasons(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	restore := swapJVMProviderFactory(jvm.NewProvider)
 	defer restore()
 
@@ -464,7 +468,7 @@ func TestJVMProbeCapabilitiesLocalizesBuiltInReadOnlyReasons(t *testing.T) {
 
 func TestJVMProbeCapabilitiesKeepsProviderReasonThatLooksLikeCatalogKeyRaw(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	providerReason := "jvm.backend.error.change_blocked_read_only"
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
 		return fakeJVMProvider{
@@ -503,6 +507,7 @@ func TestJVMProbeCapabilitiesKeepsProviderReasonThatLooksLikeCatalogKeyRaw(t *te
 
 func TestJVMProbeCapabilitiesTranslatesJMXProbeErrorUsingCurrentMode(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
+	setJVMTestLanguage(t, app, "zh-CN")
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
 		return fakeJVMProvider{
 			probeErr: errors.New("jmx test connection failed: jmx helper ping failed for localhost:18080: JMX command ping failed for localhost:18080: Failed to retrieve RMIServer stub: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: non-JRMP server at remote endpoint]; details={\"exception\":\"java.lang.IllegalStateException\"}"),
@@ -565,6 +570,7 @@ func TestJVMProbeCapabilitiesIncludesReasonWhenProviderFactoryFails(t *testing.T
 
 func TestJVMProbeCapabilitiesUsesReadableLabelForAgentValidationError(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
+	setJVMTestLanguage(t, app, "zh-CN")
 	restore := swapJVMProviderFactory(jvm.NewProvider)
 	defer restore()
 
@@ -594,6 +600,7 @@ func TestJVMProbeCapabilitiesUsesReadableLabelForAgentValidationError(t *testing
 
 func TestJVMProbeCapabilitiesUsesReadableLabelForEndpointValidationError(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
+	setJVMTestLanguage(t, app, "zh-CN")
 	restore := swapJVMProviderFactory(jvm.NewProvider)
 	defer restore()
 
@@ -704,7 +711,7 @@ func TestJVMGetValueReturnsProviderPayload(t *testing.T) {
 
 func TestJVMApplyChangeRequiresConfirmationTokenForHighRiskPreview(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	app.configDir = t.TempDir()
 	readOnly := false
 	var applyReq jvm.ChangeRequest
@@ -826,7 +833,7 @@ func TestJVMApplyChangeReturnsProviderPayload(t *testing.T) {
 
 func TestJVMApplyChangeUsesEnglishGuardFallbackWhenBlockingReasonEmpty(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	app.configDir = t.TempDir()
 	readOnly := false
 	var applyReq jvm.ChangeRequest
@@ -878,7 +885,7 @@ func TestJVMApplyChangeUsesEnglishGuardFallbackWhenBlockingReasonEmpty(t *testin
 
 func TestJVMProviderBlockingReasonThatLooksLikeCatalogKeyStaysRaw(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	app.configDir = t.TempDir()
 	readOnly := false
 	providerReason := "jvm.backend.error.change_blocked_read_only"
@@ -941,7 +948,7 @@ func TestJVMProviderBlockingReasonThatLooksLikeCatalogKeyStaysRaw(t *testing.T)
 
 func TestJVMPreviewChange(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	readOnly := true
 
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
@@ -986,7 +993,7 @@ func TestJVMPreviewChange(t *testing.T) {
 
 func TestJVMApplyChange(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	app.configDir = t.TempDir()
 	readOnly := true
 	var applyReq jvm.ChangeRequest
@@ -1131,7 +1138,7 @@ func TestJVMApplyChangePreviewTokenAllowsConfirmedApply(t *testing.T) {
 
 func TestIssueJVMPreviewConfirmationTokenLocalizesPayloadHashError(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	readOnly := false
 
 	_, err := app.issueJVMPreviewConfirmationToken(connection.ConnectionConfig{
@@ -1175,7 +1182,7 @@ func TestIssueJVMPreviewConfirmationTokenLocalizesPayloadHashError(t *testing.T)
 
 func TestJVMPreviewChangeLocalizesConfirmationTokenFailure(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	readOnly := false
 
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
@@ -1225,7 +1232,7 @@ func TestJVMPreviewChangeLocalizesConfirmationTokenFailure(t *testing.T) {
 
 func TestJVMApplyChangeLocalizesConfirmationTokenFailure(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	readOnly := false
 
 	restore := swapJVMProviderFactory(func(mode string) (jvm.Provider, error) {
@@ -1275,7 +1282,7 @@ func TestJVMApplyChangeLocalizesConfirmationTokenFailure(t *testing.T) {
 
 func TestJVMApplyChangeRejectsUnissuedDeterministicConfirmationToken(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	app.configDir = t.TempDir()
 	readOnly := false
 	var applyReq jvm.ChangeRequest
@@ -1348,7 +1355,7 @@ func TestJVMApplyChangeRejectsUnissuedDeterministicConfirmationToken(t *testing.
 
 func TestJVMApplyChangeRejectsMismatchedPreviewConfirmationContext(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	app.configDir = t.TempDir()
 	readOnly := false
 	applyCalls := 0
@@ -1497,7 +1504,7 @@ func TestJVMApplyChangeRejectsReplayedPreviewConfirmationToken(t *testing.T) {
 
 func TestJVMApplyChangeRejectsExpiredPreviewConfirmationToken(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	app.configDir = t.TempDir()
 	app.jvmPreviewTokenTTL = time.Nanosecond
 	readOnly := false
@@ -1727,7 +1734,7 @@ func TestJVMApplyChangeNormalizesRequestBeforeProviderAndAudit(t *testing.T) {
 
 func TestJVMPreviewChangeRejectsDisallowedProviderMode(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 
 	cfg := connection.ConnectionConfig{
 		Type: "jvm",
@@ -1799,7 +1806,7 @@ func TestJVMListAuditRecordsReturnsLatestRecords(t *testing.T) {
 
 func TestJVMApplyChangeFailsClosedWhenInitialAuditWriteFails(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	tempDir := t.TempDir()
 	blockerPath := filepath.Join(tempDir, "audit-blocker")
 	if err := os.WriteFile(blockerPath, []byte("blocker"), 0o600); err != nil {
@@ -1916,7 +1923,7 @@ func TestJVMApplyChangeLatestAuditRecordIsTerminal(t *testing.T) {
 
 func TestJVMApplyChangeApplySuccessKeepsSuccessWhenTerminalAuditFails(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	tempDir := t.TempDir()
 	auditDir := filepath.Join(tempDir, "audit")
 	if err := os.MkdirAll(auditDir, 0o755); err != nil {
@@ -1982,7 +1989,7 @@ func TestJVMApplyChangeApplySuccessKeepsSuccessWhenTerminalAuditFails(t *testing
 
 func TestJVMApplyChangeApplyFailureReportsFailedAuditWriteError(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	tempDir := t.TempDir()
 	auditDir := filepath.Join(tempDir, "audit")
 	if err := os.MkdirAll(auditDir, 0o755); err != nil {
@@ -2085,7 +2092,7 @@ func TestJVMApplyChangeApplyFailureKeepsProviderErrorWhenFailedAuditSucceeds(t *
 
 func TestJVMApplyChangeUsesProviderErrorWhenFailedAuditAlsoFails(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	tempDir := t.TempDir()
 	auditDir := filepath.Join(tempDir, "audit")
 	if err := os.MkdirAll(auditDir, 0o755); err != nil {
@@ -2140,7 +2147,7 @@ func TestJVMApplyChangeUsesProviderErrorWhenFailedAuditAlsoFails(t *testing.T) {
 
 func TestJVMApplyChangeTerminalAuditWarningAppendsToExistingResultMessage(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	tempDir := t.TempDir()
 	auditDir := filepath.Join(tempDir, "audit")
 	if err := os.MkdirAll(auditDir, 0o755); err != nil {
@@ -2192,7 +2199,7 @@ func TestJVMApplyChangeTerminalAuditWarningAppendsToExistingResultMessage(t *tes
 
 func TestJVMApplyChangeTerminalAuditWarningUsesStandaloneMessageWhenResultMessageEmpty(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	tempDir := t.TempDir()
 	auditDir := filepath.Join(tempDir, "audit")
 	if err := os.MkdirAll(auditDir, 0o755); err != nil {
@@ -2244,7 +2251,7 @@ func TestJVMApplyChangeTerminalAuditWarningUsesStandaloneMessageWhenResultMessag
 
 func TestJVMApplyChangeFailedAuditFailureMessageIncludesUnderlyingError(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	tempDir := t.TempDir()
 	auditDir := filepath.Join(tempDir, "audit")
 	if err := os.MkdirAll(auditDir, 0o755); err != nil {
@@ -2287,7 +2294,7 @@ func TestJVMApplyChangeFailedAuditFailureMessageIncludesUnderlyingError(t *testi
 
 func TestJVMApplyChangeFailureMessageSeparatorUsesLocalizedEnglishSeparator(t *testing.T) {
 	app := NewAppWithSecretStore(nil)
-	app.SetLanguage("en-US")
+	setJVMTestLanguage(t, app, "en-US")
 	tempDir := t.TempDir()
 	auditDir := filepath.Join(tempDir, "audit")
 	if err := os.MkdirAll(auditDir, 0o755); err != nil {

internal/db/optional_driver_agent_impl_test.go

@@ -499,8 +499,8 @@ func TestOptionalDriverAgentUnresponsiveProcessIsReapedAfterTimeout(t *testing.T
 	if !errors.Is(err, context.DeadlineExceeded) {
 		t.Fatalf("expected context deadline error, got %v", err)
 	}
-	if cmd.ProcessState == nil || !cmd.ProcessState.Exited() {
-		t.Fatalf("timed-out driver-agent process was not reaped: %#v", cmd.ProcessState)
+	if cmd.ProcessState == nil {
+		t.Fatal("timed-out driver-agent process was not reaped")
 	}
 }
 

internal/jvm/agent_provider_test.go

@@ -232,6 +232,9 @@ func startAgentFixture(t *testing.T) agentFixtureProcess {
 	}
 
 	classesDir := filepath.Join(t.TempDir(), "agent-fixture-classes")
+	if err := os.MkdirAll(classesDir, 0o755); err != nil {
+		t.Fatalf("create agent fixture classes directory failed: %v", err)
+	}
 	sourceRoot := filepath.Join(testRepoRoot(t), "internal", "jvm", "testdata", "agentfixture", "src")
 	javaFiles, err := filepath.Glob(filepath.Join(sourceRoot, "com", "gonavi", "fixture", "*.java"))
 	if err != nil {

internal/jvm/http_provider_test.go

@@ -9,6 +9,7 @@ import (
 	"net"
 	"net/http"
 	"net/http/httptest"
+	"os"
 	"os/exec"
 	"path/filepath"
 	"strings"
@@ -521,6 +522,9 @@ func startEndpointFixture(t *testing.T) endpointFixtureProcess {
 	}
 
 	classesDir := filepath.Join(t.TempDir(), "endpoint-fixture-classes")
+	if err := os.MkdirAll(classesDir, 0o755); err != nil {
+		t.Fatalf("create endpoint fixture classes directory failed: %v", err)
+	}
 	sourceRoot := filepath.Join(testRepoRoot(t), "internal", "jvm", "testdata", "endpointfixture", "src")
 	javaFiles, err := filepath.Glob(filepath.Join(sourceRoot, "com", "gonavi", "fixture", "*.java"))
 	if err != nil {

internal/jvm/jmx_provider_test.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"net"
+	"os"
 	"os/exec"
 	"path/filepath"
 	"runtime"
@@ -775,6 +776,9 @@ func startJMXFixture(t *testing.T) jmxFixtureProcess {
 	}
 
 	classesDir := filepath.Join(t.TempDir(), "fixture-classes")
+	if err := os.MkdirAll(classesDir, 0o755); err != nil {
+		t.Fatalf("create JMX fixture classes directory failed: %v", err)
+	}
 	sourceRoot := filepath.Join(testRepoRoot(t), "internal", "jvm", "testdata", "jmxfixture", "src")
 	javaFiles, err := filepath.Glob(filepath.Join(sourceRoot, "com", "gonavi", "fixture", "*.java"))
 	if err != nil {

internal/jvm/testdata/agentfixture/src/com/gonavi/fixture/GoNaviTestAgent.java

@@ -5,6 +5,7 @@ import com.sun.net.httpserver.HttpServer;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.UnsupportedEncodingException;
 import java.lang.instrument.Instrumentation;
 import java.net.InetSocketAddress;
 import java.net.URLDecoder;
@@ -350,7 +351,11 @@ public final class GoNaviTestAgent {
     }
 
     private static String decode(String value) {
-        return URLDecoder.decode(value, StandardCharsets.UTF_8);
+        try {
+            return URLDecoder.decode(value, StandardCharsets.UTF_8.name());
+        } catch (UnsupportedEncodingException err) {
+            throw new IllegalStateException("UTF-8 is unavailable", err);
+        }
     }
 
     private static AgentArgs parseArgs(String rawArgs) {

internal/jvm/testdata/endpointfixture/src/com/gonavi/fixture/EndpointTestServer.java

@@ -5,6 +5,7 @@ import com.sun.net.httpserver.HttpServer;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.UnsupportedEncodingException;
 import java.net.InetSocketAddress;
 import java.net.URLDecoder;
 import java.nio.charset.StandardCharsets;
@@ -331,7 +332,11 @@ public final class EndpointTestServer {
     }
 
     private static String decode(String value) {
-        return URLDecoder.decode(value, StandardCharsets.UTF_8);
+        try {
+            return URLDecoder.decode(value, StandardCharsets.UTF_8.name());
+        } catch (UnsupportedEncodingException err) {
+            throw new IllegalStateException("UTF-8 is unavailable", err);
+        }
     }
 
     private static Map<String, Object> requiredObject(Object value, String field) {