164 lines
3.4 KiB
Go
164 lines
3.4 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 TestRollOp(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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// and move 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 [b,c,a]
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v.executeOp(stack.ROLL, 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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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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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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}
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func TestRotOp(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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// move the third top stack a item onto
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// the top stack item c.
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// The final stack will be [b,c,a]
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v.executeOp(stack.ROT, 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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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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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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}
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func TestSwapOp(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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// Swaps the top two stack items.
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// The final stack will be [b,a]
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v.executeOp(stack.SWAP, 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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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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assert.Equal(t, int64(3), itemA.Value().Int64())
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assert.Equal(t, int64(6), itemB.Value().Int64())
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}
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func TestTuckOp(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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// copy the top stack item c and
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// inserts it before the second top stack item.
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// The final stack will be [a,c,b,c]
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v.executeOp(stack.TUCK, 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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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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itemC2, 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(9), itemC.Value().Int64())
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assert.Equal(t, int64(6), itemB.Value().Int64())
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assert.Equal(t, int64(9), itemC2.Value().Int64())
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assert.Equal(t, int64(3), itemA.Value().Int64())
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}
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