added error event hooks

tests/api.go

@@ -134,6 +134,20 @@ func (scenario *ApiScenario) Test(t *testing.T) {
 		}
 	}
 
+	// to minimize the breaking changes we always expect the error
+	// events to be called on API error
+	if res.StatusCode >= 400 {
+		if scenario.ExpectedEvents == nil {
+			scenario.ExpectedEvents = map[string]int{}
+		}
+		if _, ok := scenario.ExpectedEvents["OnBeforeApiError"]; !ok {
+			scenario.ExpectedEvents["OnBeforeApiError"] = 1
+		}
+		if _, ok := scenario.ExpectedEvents["OnAfterApiError"]; !ok {
+			scenario.ExpectedEvents["OnAfterApiError"] = 1
+		}
+	}
+
 	if len(testApp.EventCalls) > len(scenario.ExpectedEvents) {
 		t.Errorf("[%s] Expected events %v, got %v", prefix, scenario.ExpectedEvents, testApp.EventCalls)
 	}

tests/app.go

@@ -87,6 +87,16 @@ func NewTestApp(optTestDataDir ...string) (*TestApp, error) {
 		TestMailer: &TestMailer{},
 	}
 
+	t.OnBeforeApiError().Add(func(e *core.ApiErrorEvent) error {
+		t.EventCalls["OnBeforeApiError"]++
+		return nil
+	})
+
+	t.OnAfterApiError().Add(func(e *core.ApiErrorEvent) error {
+		t.EventCalls["OnAfterApiError"]++
+		return nil
+	})
+
 	t.OnModelBeforeCreate().Add(func(e *core.ModelEvent) error {
 		t.EventCalls["OnModelBeforeCreate"]++
 		return nil