test: lock in types.Header RLP encoding
#87
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ARR4N
requested review from
a team,
ceyonur,
darioush and
qdm12
and removed request for
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| require.Equal(t, BloomByteLength, rng.Read(hdr.Bloom[:])) | ||
| require.Equal(t, len(BlockNonce{}), rng.Read(hdr.Nonce[:])) | ||
| require.Equal(t, numExtraBytes, rng.Read(hdr.Extra)) | ||
| t.Logf("%T:\n%+v", hdr, hdr) |
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I think we can remove this?
| t.Logf("%T:\n%+v", hdr, hdr) |
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This is to help make the input more readable in the case of a failure of RLP assertion later. Without it, there are just two huge hex blobs. See identifying the input as a specific instance of useful test failures.
| require.NoError(t, err, "hex.DecodeString()") | ||
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| got, err := rlp.EncodeToBytes(hdr) | ||
| require.NoErrorf(t, err, "rlp.EncodeToBytes(%T)", hdr) | ||
| assert.Equalf(t, want, got, "rlp.EncodeToBytes(%T)", hdr) |
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nit I don't think there is a need for assert/require additional error messages, it will log out the line number in the test and the diffs between the two values if there is any by default, so adding a custom message feels redundant. Thoughts?
| require.NoError(t, err, "hex.DecodeString()") | |
| got, err := rlp.EncodeToBytes(hdr) | |
| require.NoErrorf(t, err, "rlp.EncodeToBytes(%T)", hdr) | |
| assert.Equalf(t, want, got, "rlp.EncodeToBytes(%T)", hdr) | |
| require.NoError(t, err) | |
| got, err := rlp.EncodeToBytes(hdr) | |
| require.NoErrorf(t, err) | |
| assert.Equalf(t, want, got) |
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As with identifying input, see identifying the function. Yes, the line number is there, but this makes error messages self-contained.
It may be overkill but it's a habit that dies hard and I think the even small pro outweighs the negligible con of including it.
| require.Equal(t, BloomByteLength, rng.Read(hdr.Bloom[:])) | ||
| require.Equal(t, len(BlockNonce{}), rng.Read(hdr.Nonce[:])) | ||
| require.Equal(t, numExtraBytes, rng.Read(hdr.Extra)) |
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nit it would be nice to populate bloom, nonce and extra before and separate from the assertions, it took me a solid minute to find where it was populated 😄
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Done. I've inlined them instead by creating the necessary methods on ethtest.PseudoRand.
| } | ||
| require.Equal(t, BloomByteLength, rng.Read(hdr.Bloom[:])) | ||
| require.Equal(t, len(BlockNonce{}), rng.Read(hdr.Nonce[:])) | ||
| require.Equal(t, numExtraBytes, rng.Read(hdr.Extra)) |
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nit That check is rather unneeded, since we test the test really, especially given numExtraBytes is defined in the test and we create the slice inline in this test.
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Now obsolete since inlining of the random generation.
2 participants
Why this should be merged
We're making changes to very sensitive code that, if broken, can result in block hashes being different.
How this works
Change-detector test.
How this was tested
A randomly filled
types.Headerwith expected RLP locked as a constant in the test.