nimbus-eth1/tests/stack_test.nim

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2018-02-07 16:16:04 +00:00
import unittest, macros, strformat, strutils, sequtils, constants, opcode_values, errors, vm / [stack, value], ttmath
suite "stack":
test "push only valid":
for value in @[0.vint, (pow(2.i256, 256) - 1.i256).vint, "ves".vbinary]:
var stack = newStack()
stack.push(value)
check(stack.values == @[value])
for value in @[(-1).vint, (-2).vint, "yzyzyzyzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz".vbinary]:
var stack = newStack()
expect(ValidationError):
stack.push(value)
test "push does not allow stack to exceed 1024":
var stack = newStack()
for z in 0 .. < 1024:
stack.push(z)
check(stack.len == 1024)
expect(FullStack):
stack.push(1025)
test "dup does not allow stack to exceed 1024":
var stack = newStack()
stack.push(1.i256)
for z in 0 ..< 1023:
stack.dup(1.i256)
check(stack.len == 1024)
expect(FullStack):
stack.dup(1.i256)
test "pop returns latest stack item":
var stack = newStack()
for element in @[1.vint, 2.vint, 3.vint]:
stack.push(element)
check(stack.popInt == 3)
stack = newStack()
for element in @["1".vbinary]:
stack.push(element)
check(stack.popBinary == "1")
test "swap correct":
var stack = newStack()
for z in 0 ..< 5:
stack.push(z)
check(stack.values == @[0.vint, 1.vint, 2.vint, 3.vint, 4.vint])
stack.swap(3)
check(stack.values == @[0.vint, 4.vint, 2.vint, 3.vint, 1.vint])
stack.swap(1)
check(stack.values == @[0.vint, 4.vint, 2.vint, 1.vint, 3.vint])
test "dup correct":
var stack = newStack()
for z in 0 ..< 5:
stack.push(z)
check(stack.values == @[0.vint, 1.vint, 2.vint, 3.vint, 4.vint])
stack.dup(1)
check(stack.values == @[0.vint, 1.vint, 2.vint, 3.vint, 4.vint, 4.vint])
stack.dup(5)
check(stack.values == @[0.vint, 1.vint, 2.vint, 3.vint, 4.vint, 4.vint, 1.vint])
test "pop raises InsufficientStack appropriately":
var stack = newStack()
expect(InsufficientStack):
discard stack.popInt()
test "swap raises InsufficientStack appropriately":
var stack = newStack()
expect(InsufficientStack):
stack.swap(0)
test "dup raises InsufficientStack appropriately":
var stack = newStack()
expect(InsufficientStack):
stack.dup(0)