73 lines
3.1 KiB
Nim
73 lines
3.1 KiB
Nim
# Nimbus
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# Copyright (c) 2018 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 unittest, macros, strformat, strutils, sequtils,
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ttmath,
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../src/[constants, opcode_values, errors, vm/memory]
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proc memory32: Memory =
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result = newMemory()
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result.extend(0.u256, 32.u256)
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proc memory128: Memory =
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result = newMemory()
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result.extend(0.u256, 128.u256)
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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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mem.write(startPosition = 0.u256, size = 4.u256, value = @[1.byte, 0.byte, 1.byte, 0.byte])
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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 invalid position":
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# expect(ValidationError):
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# var mem = memory32()
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# mem.write(startPosition = -1.i256, size = 2.i256, value = @[1.byte, 0.byte])
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# expect(ValidationError):
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# TODO: work on 256
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# var mem = memory32()
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# echo "pow ", pow(2.i256, 255) - 1.i256
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# mem.write(startPosition = pow(2.i256, 256), size = 2.i256, value = @[1.byte, 0.byte])
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test "write rejects invalid size":
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# expect(ValidationError):
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# var mem = memory32()
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# mem.write(startPosition = 0.i256, size = -1.i256, value = @[1.byte, 0.byte])
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expect(ValidationError):
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var mem = memory32()
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mem.write(startPosition = 0.u256, size = pow(2.u256, 256), value = @[1.byte, 0.byte])
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test "write rejects invalid value":
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expect(ValidationError):
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var mem = memory32()
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mem.write(startPosition = 0.u256, size = 4.u256, value = @[1.byte, 0.byte])
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test "write rejects valyes beyond memory size":
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expect(ValidationError):
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var mem = memory128()
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mem.write(startPosition = 128.u256, size = 4.u256, value = @[1.byte, 0.byte, 1.byte, 0.byte])
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test "extends appropriately extends memory":
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var mem = newMemory()
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# Test extends to 32 byte array: 0 < (start_position + size) <= 32
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mem.extend(startPosition = 0.u256, size = 10.u256)
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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(startPosition = 28.u256, size = 32.u256)
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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(startPosition = 48.u256, size = 10.u256)
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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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mem.write(startPosition = 5.u256, size = 4.u256, value = @[1.byte, 0.byte, 1.byte, 0.byte])
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check(mem.read(startPosition = 5.u256, size = 4.u256) == @[1.byte, 0.byte, 1.byte, 0.byte])
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check(mem.read(startPosition = 6.u256, size = 4.u256) == @[0.byte, 1.byte, 0.byte, 0.byte])
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check(mem.read(startPosition = 1.u256, size = 3.u256) == @[0.byte, 0.byte, 0.byte])
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