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71 lines
2.3 KiB
71 lines
2.3 KiB
package merkletree
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import (
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"math/big"
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"testing"
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"github.com/iden3/go-iden3-crypto/constants"
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cryptoUtils "github.com/iden3/go-iden3-crypto/utils"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestHashParsers(t *testing.T) {
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h0 := NewHashFromBigInt(big.NewInt(0))
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assert.Equal(t, "0", h0.String())
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h1 := NewHashFromBigInt(big.NewInt(1))
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assert.Equal(t, "1", h1.String())
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h10 := NewHashFromBigInt(big.NewInt(10))
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assert.Equal(t, "10", h10.String())
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h7l := NewHashFromBigInt(big.NewInt(1234567))
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assert.Equal(t, "1234567", h7l.String())
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h8l := NewHashFromBigInt(big.NewInt(12345678))
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assert.Equal(t, "12345678...", h8l.String())
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b, ok := new(big.Int).SetString("4932297968297298434239270129193057052722409868268166443802652458940273154854", 10) //nolint:lll
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assert.True(t, ok)
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h := NewHashFromBigInt(b)
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assert.Equal(t, "4932297968297298434239270129193057052722409868268166443802652458940273154854", h.BigInt().String()) //nolint:lll
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assert.Equal(t, "49322979...", h.String())
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assert.Equal(t, "265baaf161e875c372d08e50f52abddc01d32efc93e90290bb8b3d9ceb94e70a", h.Hex())
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b1, err := NewBigIntFromHashBytes(b.Bytes())
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assert.Nil(t, err)
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assert.Equal(t, new(big.Int).SetBytes(b.Bytes()).String(), b1.String())
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b2, err := NewHashFromBytes(b.Bytes())
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assert.Nil(t, err)
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assert.Equal(t, b.String(), b2.BigInt().String())
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h2, err := NewHashFromHex(h.Hex())
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assert.Nil(t, err)
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assert.Equal(t, h, h2)
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_, err = NewHashFromHex("0x12")
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assert.NotNil(t, err)
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// check limits
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a := new(big.Int).Sub(constants.Q, big.NewInt(1))
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testHashParsers(t, a)
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a = big.NewInt(int64(1))
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testHashParsers(t, a)
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}
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func testHashParsers(t *testing.T, a *big.Int) {
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require.True(t, cryptoUtils.CheckBigIntInField(a))
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h := NewHashFromBigInt(a)
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assert.Equal(t, a, h.BigInt())
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hFromBytes, err := NewHashFromBytes(h.Bytes())
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assert.Nil(t, err)
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assert.Equal(t, h, hFromBytes)
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assert.Equal(t, a, hFromBytes.BigInt())
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assert.Equal(t, a.String(), hFromBytes.BigInt().String())
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hFromHex, err := NewHashFromHex(h.Hex())
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assert.Nil(t, err)
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assert.Equal(t, h, hFromHex)
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aBIFromHBytes, err := NewBigIntFromHashBytes(h.Bytes())
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assert.Nil(t, err)
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assert.Equal(t, a, aBIFromHBytes)
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assert.Equal(t, new(big.Int).SetBytes(a.Bytes()).String(), aBIFromHBytes.String())
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}
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