rlp: add more tests for nil pointer / optional field encoding (#26077)
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@ -439,6 +439,16 @@ type optionalPtrField struct {
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B *[3]byte `rlp:"optional"`
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}
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type nonOptionalPtrField struct {
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A uint
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B *[3]byte
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}
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type multipleOptionalFields struct {
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A *[3]byte `rlp:"optional"`
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B *[3]byte `rlp:"optional"`
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}
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type optionalPtrFieldNil struct {
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A uint
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B *[3]byte `rlp:"optional,nil"`
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@ -744,6 +754,30 @@ var decodeTests = []decodeTest{
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ptr: new(optionalPtrField),
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value: optionalPtrField{A: 1, B: &[3]byte{1, 2, 3}},
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},
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{
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// all optional fields nil
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input: "C0",
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ptr: new(multipleOptionalFields),
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value: multipleOptionalFields{A: nil, B: nil},
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},
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{
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// all optional fields set
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input: "C88301020383010203",
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ptr: new(multipleOptionalFields),
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value: multipleOptionalFields{A: &[3]byte{1, 2, 3}, B: &[3]byte{1, 2, 3}},
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},
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{
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// nil optional field appears before a non-nil one
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input: "C58083010203",
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ptr: new(multipleOptionalFields),
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error: "rlp: input string too short for [3]uint8, decoding into (rlp.multipleOptionalFields).A",
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},
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{
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// decode a nil ptr into a ptr that is not nil or not optional
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input: "C20180",
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ptr: new(nonOptionalPtrField),
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error: "rlp: input string too short for [3]uint8, decoding into (rlp.nonOptionalPtrField).B",
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},
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{
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input: "C101",
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ptr: new(optionalPtrFieldNil),
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@ -290,6 +290,10 @@ var encTests = []encTest{
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{val: &optionalBigIntField{A: 1}, output: "C101"},
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{val: &optionalPtrField{A: 1}, output: "C101"},
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{val: &optionalPtrFieldNil{A: 1}, output: "C101"},
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{val: &multipleOptionalFields{A: nil, B: nil}, output: "C0"},
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{val: &multipleOptionalFields{A: &[3]byte{1, 2, 3}, B: &[3]byte{1, 2, 3}}, output: "C88301020383010203"},
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{val: &multipleOptionalFields{A: nil, B: &[3]byte{1, 2, 3}}, output: "C58083010203"}, // encodes without error but decode will fail
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{val: &nonOptionalPtrField{A: 1}, output: "C20180"}, // encodes without error but decode will fail
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// nil
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{val: (*uint)(nil), output: "80"},
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