disable duplication linter on predicate tests

Signed-off-by: Bruce Ma <[email protected]>

Author: mars1024

pkg/predicate/predicate_test.go

@@ -414,6 +414,7 @@ var _ = Describe("Predicate", func() {
 
 	})
 
+	// nolint:dupl
 	Describe("When checking an AnnotationChangedPredicate", func() {
 		instance := predicate.AnnotationChangedPredicate{}
 		Context("Where the old object is missing", func() {
@@ -610,6 +611,9 @@ var _ = Describe("Predicate", func() {
 		})
 	})
 
+	// LabelChangedPredicates has almost identical test cases as AnnotationChangedPredicates,
+	// so the duplication linter should be muted here.
+	//nolint:dupl
 	Describe("When checking a LabelChangedPredicate", func() {
 		instance := predicate.LabelChangedPredicate{}
 		Context("Where the old object is missing", func() {