internal/kobject: improve error JSON representation

This is now usable by internal/report.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/report/report_test.go

@@ -11,8 +11,10 @@ import (
 	"unsafe"
 
 	"hakurei.app/check"
+	"hakurei.app/internal/kobject"
 	"hakurei.app/internal/report"
 	"hakurei.app/internal/stub"
+	"hakurei.app/internal/uevent"
 )
 
 type representableUE struct{ stub.UniqueError }
@@ -38,10 +40,25 @@ func TestDispatch(t *testing.T) {
 				Message:  "rejecting coldboot loop",
 				Err:      stub.UniqueError(0xcafe),
 			},
-		}, true, []string{
-			`{"kind":"fatal","message":"rejecting coldboot loop","error":"unique error 51966 injected by the test suite"}
-`,
-		}, "dispatch: rejecting coldboot loop: unique error 51966 injected by the test suite\n", nil},
+			{
+				Severity: report.Inconsistent,
+				Message:  "processed inconsistent uevent",
+				Err: (&kobject.Event{
+					Action:   uevent.KOBJ_ADD,
+					DevPath:  "\x00",
+					Env:      map[string]string{"V": "\xfd"},
+					Sequence: 2,
+				}).NewError(kobject.EDuplicateAdd, &kobject.Object{
+					State:   kobject.StateNew,
+					DevPath: "\x00",
+					Env:     map[string]string{"V": "\xff"},
+				}),
+			},
+		}, true, []string{`{"kind":"fatal","message":"rejecting coldboot loop","error":"unique error 51966 injected by the test suite"}
+`, `{"kind":"inconsistent","message":"processed inconsistent uevent","error":{"fault":1,"event":{"action":"add","devpath":"\u0000","env":{"V":"\ufffd"},"seqnum":2,"subsystem":""},"object":{"state":1,"devpath":"\u0000","subsystem":"","env":{"V":"\ufffd"}}}}
+`}, `dispatch: rejecting coldboot loop: unique error 51966 injected by the test suite
+dispatch: processed inconsistent uevent: duplicate add event on devpath "\x00"
+`, nil},
 
 		{"strict", report.DStrict, []report.Error{
 			{