151 lines
3 KiB
Go
151 lines
3 KiB
Go
package vm
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import (
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"math/big"
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"testing"
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"github.com/CityOfZion/neo-go/pkg/vm/stack"
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"github.com/stretchr/testify/assert"
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)
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func TestDupOp(t *testing.T) {
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v := VM{}
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a, err := stack.NewInt(big.NewInt(3))
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assert.Nil(t, err)
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ctx := stack.NewContext([]byte{})
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ctx.Estack.Push(a)
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v.executeOp(stack.DUP, ctx)
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// Stack should have two items
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assert.Equal(t, 2, ctx.Estack.Len())
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item1, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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item2, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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assert.Equal(t, int64(3), item1.Value().Int64())
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assert.Equal(t, int64(3), item2.Value().Int64())
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}
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func TestNipOp(t *testing.T) {
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v := VM{}
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a, err := stack.NewInt(big.NewInt(3))
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assert.Nil(t, err)
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b, err := stack.NewInt(big.NewInt(6))
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assert.Nil(t, err)
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c, err := stack.NewInt(big.NewInt(9))
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assert.Nil(t, err)
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ctx := stack.NewContext([]byte{})
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ctx.Estack.Push(a).Push(b).Push(c)
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v.executeOp(stack.NIP, ctx)
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// Stack should have two items
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assert.Equal(t, 2, ctx.Estack.Len())
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itemC, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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itemA, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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assert.Equal(t, int64(3), itemA.Value().Int64())
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assert.Equal(t, int64(9), itemC.Value().Int64())
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}
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func TestOverOp(t *testing.T) {
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v := VM{}
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a, err := stack.NewInt(big.NewInt(3))
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assert.Nil(t, err)
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b, err := stack.NewInt(big.NewInt(6))
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assert.Nil(t, err)
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ctx := stack.NewContext([]byte{})
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ctx.Estack.Push(a).Push(b)
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// OVER copies the second top stack item a
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// onto the top stack item b.
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// the new stack will be [a,b,a].
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v.executeOp(stack.OVER, ctx)
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// Stack should have three items
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assert.Equal(t, 3, ctx.Estack.Len())
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itemA, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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itemB, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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itemA2, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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assert.Equal(t, int64(3), itemA.Value().Int64())
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assert.Equal(t, int64(6), itemB.Value().Int64())
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assert.Equal(t, int64(3), itemA2.Value().Int64())
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}
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func TestPickOp(t *testing.T) {
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v := VM{}
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a, err := stack.NewInt(big.NewInt(3))
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assert.Nil(t, err)
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b, err := stack.NewInt(big.NewInt(6))
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assert.Nil(t, err)
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c, err := stack.NewInt(big.NewInt(9))
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assert.Nil(t, err)
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d, err := stack.NewInt(big.NewInt(2))
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assert.Nil(t, err)
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ctx := stack.NewContext([]byte{})
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ctx.Estack.Push(a).Push(b).Push(c).Push(d)
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// pop n (= d = 2) from the stack.
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// we will copy the n-item which
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// has index len(stack)-n-1 (= 3-2-1= 0)
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// onto the top stack item.
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// The final stack will be [a,b,c,a]
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v.executeOp(stack.PICK, ctx)
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// Stack should have four items
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assert.Equal(t, 4, ctx.Estack.Len())
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itemA, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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itemC, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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itemB, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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itemA2, err := ctx.Estack.PopInt()
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assert.Nil(t, err)
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assert.Equal(t, int64(3), itemA.Value().Int64())
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assert.Equal(t, int64(9), itemC.Value().Int64())
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assert.Equal(t, int64(6), itemB.Value().Int64())
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assert.Equal(t, int64(3), itemA2.Value().Int64())
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}
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