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

backend/internal/service/channel_monitor_service_grok_test.go

@@ -0,0 +1,88 @@
+//go:build unit
+
+package service
+
+import "testing"
+
+func TestApplyMonitorUpdate_ProviderOnlySwitchToGrokUsesDefaultModel(t *testing.T) {
+	grok := MonitorProviderGrok
+	existing := &ChannelMonitor{
+		Provider:        MonitorProviderOpenAI,
+		APIMode:         MonitorAPIModeResponses,
+		Endpoint:        "https://api.openai.com/v1",
+		PrimaryModel:    "gpt-5",
+		IntervalSeconds: 60,
+	}
+
+	err := applyMonitorUpdate(existing, ChannelMonitorUpdateParams{Provider: &grok})
+	if err != nil {
+		t.Fatalf("provider-only switch to Grok failed: %v", err)
+	}
+	if existing.PrimaryModel != MonitorDefaultGrokModel {
+		t.Fatalf("expected Grok default model %q, got %q", MonitorDefaultGrokModel, existing.PrimaryModel)
+	}
+	if existing.APIMode != MonitorAPIModeChatCompletions {
+		t.Fatalf("expected Grok API mode %q, got %q", MonitorAPIModeChatCompletions, existing.APIMode)
+	}
+}
+
+func TestApplyMonitorUpdate_SwitchToGrokPreservesExplicitModel(t *testing.T) {
+	grok := MonitorProviderGrok
+	explicitModel := "grok-4.3"
+	existing := &ChannelMonitor{
+		Provider:        MonitorProviderOpenAI,
+		APIMode:         MonitorAPIModeChatCompletions,
+		Endpoint:        "https://api.openai.com/v1",
+		PrimaryModel:    "gpt-5",
+		IntervalSeconds: 60,
+	}
+
+	err := applyMonitorUpdate(existing, ChannelMonitorUpdateParams{
+		Provider:     &grok,
+		PrimaryModel: &explicitModel,
+	})
+	if err != nil {
+		t.Fatalf("switch to Grok with explicit model failed: %v", err)
+	}
+	if existing.PrimaryModel != explicitModel {
+		t.Fatalf("expected explicit model %q, got %q", explicitModel, existing.PrimaryModel)
+	}
+}
+
+func TestApplyMonitorUpdate_SameGrokProviderDoesNotResetExistingModel(t *testing.T) {
+	grok := MonitorProviderGrok
+	existing := &ChannelMonitor{
+		Provider:        MonitorProviderGrok,
+		APIMode:         MonitorAPIModeChatCompletions,
+		Endpoint:        "https://api.x.ai",
+		PrimaryModel:    "grok-4.3",
+		IntervalSeconds: 60,
+	}
+
+	err := applyMonitorUpdate(existing, ChannelMonitorUpdateParams{Provider: &grok})
+	if err != nil {
+		t.Fatalf("same-provider Grok update failed: %v", err)
+	}
+	if existing.PrimaryModel != "grok-4.3" {
+		t.Fatalf("same-provider update reset existing model to %q", existing.PrimaryModel)
+	}
+}
+
+func TestApplyMonitorUpdate_SwitchToGrokRejectsResponsesMode(t *testing.T) {
+	grok := MonitorProviderGrok
+	responses := MonitorAPIModeResponses
+	existing := &ChannelMonitor{
+		Provider:        MonitorProviderOpenAI,
+		APIMode:         MonitorAPIModeChatCompletions,
+		PrimaryModel:    "gpt-5",
+		IntervalSeconds: 60,
+	}
+
+	err := applyMonitorUpdate(existing, ChannelMonitorUpdateParams{
+		Provider: &grok,
+		APIMode:  &responses,
+	})
+	if err == nil {
+		t.Fatal("Grok responses mode should remain unsupported")
+	}
+}