54 lines
2.2 KiB
Nim
54 lines
2.2 KiB
Nim
# Nimbus
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# Copyright (c) 2018-2024 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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import
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std/sequtils,
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unittest2,
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../nimbus/evm/evm_errors,
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../nimbus/evm/memory
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proc memory32: EvmMemoryRef =
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result = EvmMemoryRef.new(32)
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proc memory128: EvmMemoryRef =
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result = EvmMemoryRef.new(123)
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proc memoryMain*() =
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suite "memory":
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test "write":
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var mem = memory32()
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# Test that write creates 32byte string == value padded with zeros
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check mem.write(startPos = 0, value = @[1.byte, 0.byte, 1.byte, 0.byte]).isOk
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check(mem.bytes == @[1.byte, 0.byte, 1.byte, 0.byte].concat(repeat(0.byte, 28)))
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test "write rejects values beyond memory size":
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var mem = memory128()
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check mem.write(startPos = 128, value = @[1.byte, 0.byte, 1.byte, 0.byte]).error.code == EvmErrorCode.MemoryFull
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check mem.write(startPos = 128, value = 1.byte).error.code == EvmErrorCode.MemoryFull
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test "extends appropriately extends memory":
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var mem = EvmMemoryRef.new()
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# Test extends to 32 byte array: 0 < (start_position + size) <= 32
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mem.extend(startPos = 0, size = 10)
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check(mem.bytes == repeat(0.byte, 32))
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# Test will extend past length if params require: 32 < (start_position + size) <= 64
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mem.extend(startPos = 28, size = 32)
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check(mem.bytes == repeat(0.byte, 64))
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# Test won't extend past length unless params require: 32 < (start_position + size) <= 64
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mem.extend(startPos = 48, size = 10)
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check(mem.bytes == repeat(0.byte, 64))
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test "read returns correct bytes":
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var mem = memory32()
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check mem.write(startPos = 5, value = @[1.byte, 0.byte, 1.byte, 0.byte]).isOk
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check(@(mem.read(startPos = 5, size = 4)) == @[1.byte, 0.byte, 1.byte, 0.byte])
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check(@(mem.read(startPos = 6, size = 4)) == @[0.byte, 1.byte, 0.byte, 0.byte])
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check(@(mem.read(startPos = 1, size = 3)) == @[0.byte, 0.byte, 0.byte])
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when isMainModule:
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memoryMain()
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