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package merkle
import (
"testing"
"github.com/pkg/errors"
"github.com/stretchr/testify/assert"
amino "github.com/tendermint/go-amino"
)
const ProofOpDomino = "test:domino"
// Expects given input, produces given output.
// Like the game dominos.
type DominoOp struct {
key string // unexported, may be empty
Input string
Output string
}
func NewDominoOp(key, input, output string) DominoOp {
return DominoOp{
key: key,
Input: input,
Output: output,
}
}
//nolint:unused
func DominoOpDecoder(pop ProofOp) (ProofOperator, error) {
if pop.Type != ProofOpDomino {
panic("unexpected proof op type")
}
var op DominoOp // a bit strange as we'll discard this, but it works.
err := amino.UnmarshalBinaryLengthPrefixed(pop.Data, &op)
if err != nil {
return nil, errors.Wrap(err, "decoding ProofOp.Data into SimpleValueOp")
}
return NewDominoOp(string(pop.Key), op.Input, op.Output), nil
}
func (dop DominoOp) ProofOp() ProofOp {
bz := amino.MustMarshalBinaryLengthPrefixed(dop)
return ProofOp{
Type: ProofOpDomino,
Key: []byte(dop.key),
Data: bz,
}
}
func (dop DominoOp) Run(input [][]byte) (output [][]byte, err error) {
if len(input) != 1 {
return nil, errors.New("expected input of length 1")
}
if string(input[0]) != dop.Input {
return nil, errors.Errorf("expected input %v, got %v",
dop.Input, string(input[0]))
}
return [][]byte{[]byte(dop.Output)}, nil
}
func (dop DominoOp) GetKey() []byte {
return []byte(dop.key)
}
//----------------------------------------
func TestProofOperators(t *testing.T) {
var err error
// ProofRuntime setup
// TODO test this somehow.
// prt := NewProofRuntime()
// prt.RegisterOpDecoder(ProofOpDomino, DominoOpDecoder)
// ProofOperators setup
op1 := NewDominoOp("KEY1", "INPUT1", "INPUT2")
op2 := NewDominoOp("KEY2", "INPUT2", "INPUT3")
op3 := NewDominoOp("", "INPUT3", "INPUT4")
op4 := NewDominoOp("KEY4", "INPUT4", "OUTPUT4")
// Good
popz := ProofOperators([]ProofOperator{op1, op2, op3, op4})
err = popz.Verify(bz("OUTPUT4"), "/KEY4/KEY2/KEY1", [][]byte{bz("INPUT1")})
assert.Nil(t, err)
err = popz.VerifyValue(bz("OUTPUT4"), "/KEY4/KEY2/KEY1", bz("INPUT1"))
assert.Nil(t, err)
// BAD INPUT
err = popz.Verify(bz("OUTPUT4"), "/KEY4/KEY2/KEY1", [][]byte{bz("INPUT1_WRONG")})
assert.NotNil(t, err)
err = popz.VerifyValue(bz("OUTPUT4"), "/KEY4/KEY2/KEY1", bz("INPUT1_WRONG"))
assert.NotNil(t, err)
// BAD KEY 1
err = popz.Verify(bz("OUTPUT4"), "/KEY3/KEY2/KEY1", [][]byte{bz("INPUT1")})
assert.NotNil(t, err)
// BAD KEY 2
err = popz.Verify(bz("OUTPUT4"), "KEY4/KEY2/KEY1", [][]byte{bz("INPUT1")})
assert.NotNil(t, err)
// BAD KEY 3
err = popz.Verify(bz("OUTPUT4"), "/KEY4/KEY2/KEY1/", [][]byte{bz("INPUT1")})
assert.NotNil(t, err)
// BAD KEY 4
err = popz.Verify(bz("OUTPUT4"), "//KEY4/KEY2/KEY1", [][]byte{bz("INPUT1")})
assert.NotNil(t, err)
// BAD KEY 5
err = popz.Verify(bz("OUTPUT4"), "/KEY2/KEY1", [][]byte{bz("INPUT1")})
assert.NotNil(t, err)
// BAD OUTPUT 1
err = popz.Verify(bz("OUTPUT4_WRONG"), "/KEY4/KEY2/KEY1", [][]byte{bz("INPUT1")})
assert.NotNil(t, err)
// BAD OUTPUT 2
err = popz.Verify(bz(""), "/KEY4/KEY2/KEY1", [][]byte{bz("INPUT1")})
assert.NotNil(t, err)
// BAD POPZ 1
popz = []ProofOperator{op1, op2, op4}
err = popz.Verify(bz("OUTPUT4"), "/KEY4/KEY2/KEY1", [][]byte{bz("INPUT1")})
assert.NotNil(t, err)
// BAD POPZ 2
popz = []ProofOperator{op4, op3, op2, op1}
err = popz.Verify(bz("OUTPUT4"), "/KEY4/KEY2/KEY1", [][]byte{bz("INPUT1")})
assert.NotNil(t, err)
// BAD POPZ 3
popz = []ProofOperator{}
err = popz.Verify(bz("OUTPUT4"), "/KEY4/KEY2/KEY1", [][]byte{bz("INPUT1")})
assert.NotNil(t, err)
}
func bz(s string) []byte {
return []byte(s)
}