shithub: hugo

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tpl/collections: Add some empty slice tests to intersect

See #3686

--- a/tpl/collections/collections_test.go

+++ b/tpl/collections/collections_test.go

@@ -344,6 +344,10 @@

 		{pagesVals{p1v, p4v, p2v, p3v}, pagesVals{p1v, p3v, p3v}, pagesVals{p1v, p3v}},

 		{[]interface{}{p1, p4, p2, p3}, []interface{}{p4, p2, p2}, []interface{}{p4, p2}},

 		{[]interface{}{p1v, p4v, p2v, p3v}, []interface{}{p1v, p3v, p3v}, []interface{}{p1v, p3v}},

+		{pagesPtr{p1, p4, p2, p3}, pagesPtr{}, pagesPtr{}},

+		{pagesVals{}, pagesVals{p1v, p3v, p3v}, pagesVals{}},

+		{[]interface{}{p1, p4, p2, p3}, []interface{}{}, []interface{}{}},

+		{[]interface{}{}, []interface{}{p1v, p3v, p3v}, []interface{}{}},

 	} {

 		errMsg := fmt.Sprintf("[%d]", test)