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

backend/internal/service/openai_passthrough_normalization_test.go

@@ -0,0 +1,104 @@
+package service
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"github.com/tidwall/gjson"
+)
+
+func TestNormalizeOpenAIPassthroughOAuthBody_RemovesUnsupportedUser(t *testing.T) {
+	body := []byte(`{"model":"gpt-5.4","input":"hello","user":"user_123","metadata":{"user_id":"user_123"},"prompt_cache_retention":"24h","safety_identifier":"sid","stream_options":{"include_usage":true}}`)
+
+	normalized, changed, err := normalizeOpenAIPassthroughOAuthBody(body, false)
+	require.NoError(t, err)
+	require.True(t, changed)
+	for _, field := range openAIChatGPTInternalUnsupportedFields {
+		require.False(t, gjson.GetBytes(normalized, field).Exists(), "%s should be stripped", field)
+	}
+	require.True(t, gjson.GetBytes(normalized, "stream").Bool())
+	require.False(t, gjson.GetBytes(normalized, "store").Bool())
+}
+
+func TestNormalizeOpenAIPassthroughOAuthBody_CompactRemovesUnsupportedUser(t *testing.T) {
+	body := []byte(`{"model":"gpt-5.4","input":"hello","user":"user_123","metadata":{"user_id":"user_123"},"stream":true,"store":true}`)
+
+	normalized, changed, err := normalizeOpenAIPassthroughOAuthBody(body, true)
+	require.NoError(t, err)
+	require.True(t, changed)
+	require.False(t, gjson.GetBytes(normalized, "user").Exists())
+	require.False(t, gjson.GetBytes(normalized, "metadata").Exists())
+	require.False(t, gjson.GetBytes(normalized, "stream").Exists())
+	require.False(t, gjson.GetBytes(normalized, "store").Exists())
+}
+
+func TestNormalizeOpenAIPassthroughOAuthBody_StringInputWrappedAsArray(t *testing.T) {
+	body := []byte(`{"model":"gpt-5.4","input":"hello world"}`)
+
+	normalized, changed, err := normalizeOpenAIPassthroughOAuthBody(body, false)
+	require.NoError(t, err)
+	require.True(t, changed)
+
+	input := gjson.GetBytes(normalized, "input")
+	require.True(t, input.IsArray(), "string input should be converted to array")
+	items := input.Array()
+	require.Len(t, items, 1)
+	require.Equal(t, "message", items[0].Get("type").String())
+	require.Equal(t, "user", items[0].Get("role").String())
+	require.Equal(t, "hello world", items[0].Get("content").String())
+}
+
+func TestNormalizeOpenAIPassthroughOAuthBody_EmptyStringInputWrappedAsEmptyArray(t *testing.T) {
+	body := []byte(`{"model":"gpt-5.4","input":"  "}`)
+
+	normalized, changed, err := normalizeOpenAIPassthroughOAuthBody(body, false)
+	require.NoError(t, err)
+	require.True(t, changed)
+
+	input := gjson.GetBytes(normalized, "input")
+	require.True(t, input.IsArray())
+	require.Len(t, input.Array(), 0, "whitespace-only input should become empty array")
+}
+
+func TestNormalizeOpenAIPassthroughOAuthBody_ObjectInputWrappedAsArray(t *testing.T) {
+	body := []byte(`{"model":"gpt-5.4","input":{"type":"message","role":"user","content":"hi"}}`)
+
+	normalized, changed, err := normalizeOpenAIPassthroughOAuthBody(body, false)
+	require.NoError(t, err)
+	require.True(t, changed)
+
+	input := gjson.GetBytes(normalized, "input")
+	require.True(t, input.IsArray(), "object input should be wrapped in array")
+	items := input.Array()
+	require.Len(t, items, 1)
+	require.Equal(t, "message", items[0].Get("type").String())
+}
+
+func TestNormalizeOpenAIPassthroughOAuthBody_ArrayInputUnchanged(t *testing.T) {
+	body := []byte(`{"model":"gpt-5.4","input":[{"type":"message","role":"user","content":"hi"}]}`)
+
+	normalized, _, err := normalizeOpenAIPassthroughOAuthBody(body, false)
+	require.NoError(t, err)
+
+	input := gjson.GetBytes(normalized, "input")
+	require.True(t, input.IsArray())
+	require.Len(t, input.Array(), 1)
+	require.Equal(t, "message", input.Array()[0].Get("type").String())
+}
+
+func TestDetectOpenAIPassthroughInstructionsRejectReason(t *testing.T) {
+	for _, tt := range []struct {
+		name string
+		body string
+		want string
+	}{
+		{name: "missing is optional", body: `{"model":"gpt-5.1-codex"}`, want: ""},
+		{name: "non string remains rejected", body: `{"instructions":{"text":"invalid"}}`, want: "instructions_not_string"},
+		{name: "empty remains rejected", body: `{"instructions":"  "}`, want: "instructions_empty"},
+		{name: "non empty remains accepted", body: `{"instructions":"client guidance"}`, want: ""},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			require.Equal(t, tt.want, detectOpenAIPassthroughInstructionsRejectReason("gpt-5.1-codex", []byte(tt.body)))
+		})
+	}
+}