Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/internal/service/openai_compact_body_signal_test.go

@@ -0,0 +1,56 @@
+//go:build unit
+
+package service
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestHasCompactionTriggerInInput_DetectsCompactSignal(t *testing.T) {
+	body := []byte(`{
+		"model":"gpt-5.5",
+		"stream":true,
+		"input":[
+			{"type":"message","role":"user","content":"hello"},
+			{"type":"compaction_trigger"}
+		]
+	}`)
+	require.True(t, HasCompactionTriggerInInput(body))
+}
+
+func TestHasCompactionTriggerInInput_NoTrigger(t *testing.T) {
+	body := []byte(`{
+		"model":"gpt-5.5",
+		"input":[
+			{"type":"message","role":"user","content":"hello"}
+		]
+	}`)
+	require.False(t, HasCompactionTriggerInInput(body))
+}
+
+func TestHasCompactionTriggerInInput_EmptyInput(t *testing.T) {
+	body := []byte(`{"model":"gpt-5.5","input":[]}`)
+	require.False(t, HasCompactionTriggerInInput(body))
+}
+
+func TestHasCompactionTriggerInInput_NoInputField(t *testing.T) {
+	body := []byte(`{"model":"gpt-5.5"}`)
+	require.False(t, HasCompactionTriggerInInput(body))
+}
+
+func TestHasCompactionTriggerInInput_EmptyBody(t *testing.T) {
+	require.False(t, HasCompactionTriggerInInput(nil))
+	require.False(t, HasCompactionTriggerInInput([]byte{}))
+}
+
+func TestHasCompactionTriggerInInput_StringInput(t *testing.T) {
+	body := []byte(`{"model":"gpt-5.5","input":"compaction_trigger"}`)
+	require.False(t, HasCompactionTriggerInInput(body))
+}
+
+func TestHasCompactionTriggerInInput_CompactTriggerOnly(t *testing.T) {
+	body := []byte(`{"model":"gpt-5.5","input":[{"type":"compaction_trigger"}]}`)
+	require.True(t, HasCompactionTriggerInInput(body))
+}