Make testsuite emu/plugins/tdl pass on Go 1.20+
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I thought newer versions of Go weren't supposed to break existing code due to the backward compatibility promise. Well... |
Prior to Go 1.20 the pseudo-random number generator was seeded like Seed(1)
at program startup, but in later releases the generator is seeded randomly.
Since the testcase "typeDef1" uses the "rand" op the testcase output does
not always match the expected file: unit-test/exp/typeDef1.json
This is due to the different random order in Go 1.20+. By setting seed=1,
as previously done by Go itself, we get the same result in all Go version.
- Testcase
"params":
{
"size": 6,
"offset": 0,
"op": "rand",
"list": ["TRex", "Cisco", "Golang"]
}
- Go doc:
https://pkg.go.dev/math/rand@master#Seed
Signed-off-by: Björn Svensson <[email protected]>
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Yes, me too. I had to dig deep to find the reason as well.. |
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I see that you changed organisation and user @bdollma-te, are you still a maintainer for trex-emu? |
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Yes yes same person, simply multiple accounts and I commented with the other one. |
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Prior to Go 1.20 the pseudo-random number generator was seeded like Seed(1) at program startup, but in later releases the generator is seeded randomly.
Since the testcase
typeDef1uses therandoperation the testcase output does not always match the expected file:unit-test/exp/typeDef1.json.This is due to the different random order in Go 1.20+.
By setting seed=1 via its
TdlTestBase, as previously done by Go itself, we get the same result in all Go version.References:
Testcase:
"params": { "size": 6, "offset": 0, "op": "rand", "list": ["TRex", "Cisco", "Golang"] }Go doc: https://pkg.go.dev/math/rand@master#Seed